US Patent Class 219
ELECTRIC HEATING
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| DF | CLASS NOTES | |
| 600 | DF | INDUCTIVE HEATING |
| 601 | DF | .~ With diverse-type heating |
| 602 | DF | .~ Metal working |
| 603 | DF | .~.~ Bonding |
| 604 | DF | .~.~.~ Container sealing |
| 605 | DF | .~.~.~ Wire (e.g., cable, etc.) |
| 606 | DF | .~.~.~ Ring |
| 607 | DF | .~.~.~ Tube (i.e., pipe) |
| 608 | DF | .~.~.~.~ With electrical control (e.g., speed, temperature, gaging thickness, etc.) |
| 609 | DF | .~.~.~.~ Layering (e.g., coating, lining, etc.) |
| 610 | DF | .~.~.~.~ With preheating or postheating |
| 611 | DF | .~.~.~.~ Plural (e.g., end to end, etc.) |
| 612 | DF | .~.~.~.~ Seam bonding |
| 613 | DF | .~.~.~.~.~ With impeder |
| 614 | DF | .~.~.~.~.~ With guiding device |
| 615 | DF | .~.~.~ Brazing (e.g., cladding, etc.) |
| 616 | DF | .~.~.~ Soldering |
| 617 | DF | .~.~.~ Welding |
| 618 | DF | .~ With heat exchange |
| 619 | DF | .~.~ Roller (e.g., godet, etc.) |
| 620 | DF | .~.~ Cooking |
| 621 | DF | .~.~.~ Utensil (e.g., pot, pan, etc.) |
| 622 | DF | .~.~.~ With support |
| 623 | DF | .~.~.~.~ Having cooling device |
| 624 | DF | .~.~.~ Core or coil structure |
| 625 | DF | .~.~.~ Intermediate member condition responsive |
| 626 | DF | .~.~.~.~ Load sensing |
| 627 | DF | .~.~.~.~ Temperature |
| 628 | DF | .~.~ Fluid or liquid heater |
| 629 | DF | .~.~.~ By tube (i.e., pipe) |
| 630 | DF | .~.~.~.~ Core or coil structure |
| 631 | DF | .~.~.~.~.~ Core rotation |
| 632 | DF | .~.~ With cooling arrangement |
| 633 | DF | .~.~ Bonding (e.g., nonmetallic, etc.) |
| 634 | DF | .~.~ Susceptor |
| 635 | DF | .~ Specific heating application |
| 636 | DF | .~.~ Wire (e.g., cable, etc.) |
| 637 | DF | .~.~ Rod |
| 638 | DF | .~.~.~ Semiconductor |
| 639 | DF | .~.~.~ Irregular (e.g., camshaft, etc.) |
| 640 | DF | .~.~ Gear |
| 641 | DF | .~.~ Valve |
| 642 | DF | .~.~ Ring or link |
| 643 | DF | .~.~ Tube (i.e., pipe) |
| 644 | DF | .~.~.~ Interior surface |
| 645 | DF | .~.~ Strip (e.g., sheet, etc.) |
| 646 | DF | .~.~ Slab (e.g., ingot, etc.) |
| 647 | DF | .~ With workpiece support |
| 648 | DF | .~.~ Levitation |
| 649 | DF | .~.~ Materials |
| 650 | DF | .~.~ With monitoring (e.g., regulating, etc.) |
| 651 | DF | .~.~ Gas environment |
| 652 | DF | .~.~ Rotation of workpiece |
| 653 | DF | .~.~ Conveyor |
| 654 | DF | .~.~.~ Charge or discharge |
| 655 | DF | .~.~.~ Multiple stations |
| 656 | DF | .~.~.~.~ Plural heating zones |
| 657 | DF | .~.~.~ Curve path |
| 658 | DF | .~.~.~ Lift (i.e., vertical movement) |
| 659 | DF | .~.~ Pressure applicator (e.g., clamp, etc.) |
| 660 | DF | .~ With power supply system |
| 661 | DF | .~.~ Power switching |
| 662 | DF | .~.~.~ Plural load inductors |
| 663 | DF | .~.~.~ Condition responsive |
| 664 | DF | .~.~.~.~ Input monitoring |
| 665 | DF | .~.~.~.~ Load sensing |
| 666 | DF | .~.~.~.~.~ With tuning |
| 667 | DF | .~.~.~.~.~ Temperature |
| 668 | DF | .~.~.~ With protection |
| 669 | DF | .~.~.~ Polyphase |
| 670 | DF | .~.~ With specific transformer |
| 671 | DF | .~.~ With plural load inductors |
| 672 | DF | .~ Specific inductor configuration |
| 673 | DF | .~.~ U-coil section |
| 674 | DF | .~.~ Cylindrical coil |
| 675 | DF | .~.~ Planar coil |
| 676 | DF | .~.~ With inductor support |
| 677 | DF | .~.~ With cooling arrangement |
| 678 | DF | MICROWAVE HEATING |
| 679 | DF | .~ With diverse device |
| 680 | DF | .~ With diverse-type heating |
| 681 | DF | .~.~ Convection heating |
| 682 | DF | .~.~.~ Steam generating |
| 683 | DF | .~.~.~ Gas burner |
| 684 | DF | .~.~.~ Tunnel type |
| 685 | DF | .~.~ Resistive heating |
| 686 | DF | .~ Gas environment (e.g., pressurized, etc.) |
| 687 | DF | .~ Fluid heater |
| 688 | DF | .~.~ Water |
| 689 | DF | .~.~ Beverage (e.g., coffee, etc.) |
| 690 | DF | .~ Waveguide applicator |
| 691 | DF | .~.~ Slotted |
| 692 | DF | .~.~.~ Meander (e.g., zigzag, etc.) |
| 693 | DF | .~.~.~ Having load passage |
| 694 | DF | .~.~ With dummy load |
| 695 | DF | .~.~ Input power port arrangement |
| 696 | DF | .~.~.~ With tuning |
| 697 | DF | .~.~.~ Plural feed |
| 698 | DF | .~ Tunnel furnace |
| 699 | DF | .~.~ With leakage suppression |
| 700 | DF | .~.~ Conveyor |
| 701 | DF | .~.~.~ Plural heating zones |
| 702 | DF | .~ With control system |
| 703 | DF | .~.~ Defrost |
| 704 | DF | .~.~ Load condition sensor |
| 705 | DF | .~.~.~ Plural diverse types |
| 706 | DF | .~.~.~ By ultrasonic or acoustic |
| 707 | DF | .~.~.~ Gas or vapor |
| 708 | DF | .~.~.~ Weight |
| 709 | DF | .~.~.~ Field intensity/reflection |
| 710 | DF | .~.~.~ Temperature |
| 711 | DF | .~.~.~.~ By infrared |
| 712 | DF | .~.~.~.~ Probe |
| 713 | DF | .~.~.~.~.~ Wireless type |
| 714 | DF | .~.~ Remote (e.g., card, etc.) |
| 715 | DF | .~.~ Power switching |
| 716 | DF | .~.~.~ With detector |
| 717 | DF | .~.~.~ Plural power supplies |
| 718 | DF | .~.~.~ Having duty cycle |
| 719 | DF | .~.~ With timer |
| 720 | DF | .~.~ With display or alarm |
| 721 | DF | .~.~ Starting circuitry |
| 722 | DF | .~.~ Interlock circuitry and structure |
| 723 | DF | .~.~.~ With additional safety feature |
| 724 | DF | .~.~.~ With latch assembly |
| 725 | DF | .~ Cookware (e.g., vessel, utensil, etc.) |
| 726 | DF | .~.~ With food mixer |
| 727 | DF | .~.~ Expandable |
| 728 | DF | .~.~ With field modifier |
| 729 | DF | .~.~.~ Shielding |
| 730 | DF | .~.~ With heat exchange (e.g., susceptor, etc.) |
| 731 | DF | .~.~.~ By fluent material (e.g., steaming, boiling, or frying, etc.) |
| 732 | DF | .~.~ With stand or handle |
| 733 | DF | .~.~ With drainage |
| 734 | DF | .~.~ With cover |
| 735 | DF | .~.~.~ Having vent |
| 736 | DF | .~ Radiation protection |
| 737 | DF | .~.~ With leakage detector |
| 738 | DF | .~.~ With leakage prevention |
| 739 | DF | .~.~.~ Door assembly |
| 740 | DF | .~.~.~.~ With screen or window |
| 741 | DF | .~.~.~.~ With choke or seal |
| 742 | DF | .~.~.~.~.~ Slotted choke |
| 743 | DF | .~.~.~.~.~ Choke cavity cover |
| 744 | DF | .~.~.~ Absorption |
| 745 | DF | .~ Field modification |
| 746 | DF | .~.~ With power feed structure |
| 747 | DF | .~.~.~ Phase shifting |
| 748 | DF | .~.~.~ Radiator (e.g., antenna, etc.) |
| 749 | DF | .~.~.~.~ Rotating |
| 750 | DF | .~.~.~ With tuning or particular modes |
| 751 | DF | .~.~ Mixer (e.g., rotating stirrer, etc.) |
| 752 | DF | .~.~ By load support movement |
| 753 | DF | .~.~.~ Horizontal and vertical |
| 754 | DF | .~.~.~ Horizontal (e.g., turntable, etc.) |
| 755 | DF | .~.~.~.~ Portable |
| 756 | DF | .~ Enclosed cavity structure |
| 757 | DF | .~.~ With cooling or ventilation |
| 758 | DF | .~.~ With cavity illumination |
| 759 | DF | .~ With heat exchange (e.g., susceptor, etc.) |
| 760 | DF | .~ With specific transformer |
| 761 | DF | .~ With specific generator |
| 762 | DF | .~ Load support |
| 763 | DF | .~.~ Shelf |
| 764 | DF | CAPACITIVE DIELECTRIC HEATING |
| 765 | DF | .~ Bonding |
| 766 | DF | .~.~ Shoe |
| 767 | DF | .~.~ Die embroidery |
| 768 | DF | .~.~ Sewing machine type |
| 769 | DF | .~.~ Container sealing |
| 770 | DF | .~ Specific heating application |
| 771 | DF | .~.~ Food |
| 772 | DF | .~.~ Fluent material |
| 773 | DF | .~.~ Sheet (e.g., board, etc.) |
| 774 | DF | .~ With workpiece support |
| 775 | DF | .~.~ Conveyor |
| 776 | DF | .~.~.~ Multiple stations |
| 777 | DF | .~.~ Pressure applicator (e.g., clamp, etc.) |
| 778 | DF | .~ With power supply system |
| 779 | DF | .~.~ Condition responsive |
| 780 | DF | .~ Specific electrode configuration |
| 50 | DF | METAL HEATING (E.G., RESISTANCE HEATING) |
| 51 | DF | .~ Chain |
| 52 | DF | .~.~ Methods |
| 53 | DF | .~ Rail bond |
| 54 | DF | .~.~ Arc weld |
| 55 | DF | .~.~ Resistance weld methods |
| 56 | DF | .~ Wire, rod, or bar bonding |
| 56.1 | DF | .~.~ Of wire leads |
| 56.21 | DF | .~.~.~ By microbonding |
| 56.22 | DF | .~.~.~ Methods |
| 57 | DF | .~.~ Butt bonding (e.g., welding) |
| 58 | DF | .~.~ Methods |
| 59.1 | DF | .~ Of cylinders (e.g., pipes and tubes) |
| 60 R | DF | .~.~ Electric arc |
| 60.2 | DF | .~.~.~ Tube sheet welding |
| 61 | DF | .~.~.~ Methods |
| 60 A | DF | .~.~.~ Rotatable tube welders |
| 61.1 | DF | .~.~ Having internal support means |
| 61.11 | DF | .~.~.~ With forming means |
| 61.12 | DF | .~.~.~ With cleaning means |
| 61.13 | DF | .~.~.~ With edge guidance means |
| 61.2 | DF | .~.~ Utilizing high frequency resistance heating |
| 61.3 | DF | .~.~ With edge guidance means |
| 61.4 | DF | .~.~ With adjustable electrode means |
| 61.5 | DF | .~.~ With condition responsive control of the welding process |
| 61.6 | DF | .~.~ Using three or more electrodes |
| 61.7 | DF | .~.~ With cooling means |
| 62 | DF | .~.~ Helical seam |
| 63 | DF | .~.~ Rotary transformer part |
| 64 | DF | .~.~ Container (e.g., cans) |
| 65 | DF | .~.~ Nonrotary electrode (e.g., oscillating) |
| 66 | DF | .~.~ Inside electrode |
| 67 | DF | .~.~ Resistance heating methods |
| 68 | DF | .~ Cutting or disintegrating (e.g., machining engraving) |
| 69.1 | DF | .~.~ Electric arc |
| 69.11 | DF | .~.~ Electric spark machining |
| 69.12 | DF | .~.~.~ Wire cutting |
| 69.13 | DF | .~.~.~ Circuits |
| 69.14 | DF | .~.~.~ Dielectric composition and purification |
| 69.15 | DF | .~.~.~ Electrodes |
| 69.16 | DF | .~.~.~ Gap spacing control |
| 69.17 | DF | .~.~.~ Methods |
| 69.18 | DF | .~.~.~ Pulse |
| 69.19 | DF | .~.~.~ Safety circuits |
| 69.2 | DF | .~.~.~ Vibrating electrodes or workpiece |
| 70 | DF | .~.~.~ Hand-type tools |
| 71 | DF | .~ Liquid electrode |
| 72 | DF | .~ Nonatmospheric environment at hot spot (e.g., resistance weld under oil, vacuum) |
| 73 | DF | .~.~ Slag (e.g., submerged arc) |
| 73.1 | DF | .~.~.~ Including electroslag welding |
| 73.11 | DF | .~.~.~.~ For coating |
| 73.2 | DF | .~.~.~ With granular flux supply |
| 73.21 | DF | .~.~.~.~ For deposition welding |
| 74 | DF | .~.~ Gas supply (e.g., by ingredient of electrode, by external source) |
| 75 | DF | .~.~.~ Nonconsumable electrode (e.g., atomic hydrogen) |
| 76.1 | DF | .~ For deposition welding (e.g., coating or building up) |
| 76.11 | DF | .~.~ With cooling means |
| 76.12 | DF | .~.~ Of multiple distinct layers |
| 76.13 | DF | .~.~ By spark discharge |
| 76.14 | DF | .~.~ By electric arc |
| 76.15 | DF | .~.~.~ With nonconsumable electrode |
| 76.16 | DF | .~.~.~ Plasma |
| 76.17 | DF | .~.~ By resistance heating |
| 77 | DF | .~.~ Cutting edges of tools |
| 78.01 | DF | .~ For bonding with pressure (e.g., resistance welding) |
| 85.1 | DF | .~.~ Brazing or soldering |
| 85.12 | DF | .~.~.~ Utilizing radiant energy |
| 85.13 | DF | .~.~.~.~ Methods |
| 85.14 | DF | .~.~.~ With filler metal in circuit |
| 85.15 | DF | .~.~.~.~ Methods |
| 85.16 | DF | .~.~.~ Electrically heated tool (e.g., electrodes, heaters, etc.) |
| 85.17 | DF | .~.~.~ Furnaces or enclosures |
| 85.18 | DF | .~.~.~ Wire lead bonders |
| 85.19 | DF | .~.~.~ Machine for predetermined operation |
| 85.2 | DF | .~.~.~ Fluxes or solders |
| 85.21 | DF | .~.~.~ Solder preforms |
| 85.22 | DF | .~.~.~ Methods |
| 78.02 | DF | .~.~ By solid-state bonding (e.g., diffusion) |
| 78.11 | DF | .~.~ Honeycomb |
| 78.12 | DF | .~.~.~ Methods |
| 78.13 | DF | .~.~ With additional heating device |
| 78.14 | DF | .~.~ With work cleaning means |
| 78.15 | DF | .~.~ With work cutting means |
| 78.16 | DF | .~.~ With work deforming means (e.g., tube sealing) |
| 79 | DF | .~.~ With conveyer for workpiece |
| 80 | DF | .~.~.~ Spot bond |
| 81 | DF | .~.~ Roller electrode |
| 82 | DF | .~.~.~ Roller moves over work |
| 83 | DF | .~.~.~ Methods |
| 84 | DF | .~.~.~ Electrode structure |
| 86.1 | DF | .~.~ By spot bonding |
| 86.21 | DF | .~.~.~ With hand-manipulative portable devices |
| 86.22 | DF | .~.~.~ With separately applied pressure and heat |
| 86.23 | DF | .~.~.~ With welding pressure controlled by the work support |
| 86.24 | DF | .~.~.~ With work orientation means |
| 86.25 | DF | .~.~.~ With significant electrode support |
| 86.31 | DF | .~.~.~.~ Having cooling means |
| 86.32 | DF | .~.~.~.~ Having magnetic force actuated electrode |
| 86.33 | DF | .~.~.~.~ Having adjustment means |
| 86.41 | DF | .~.~.~.~.~ With condition responsive control means |
| 86.51 | DF | .~.~.~.~.~.~ Responsive to pressure |
| 86.61 | DF | .~.~.~.~.~.~.~ By force balancing |
| 86.7 | DF | .~.~.~.~.~ For predetermined welding operation |
| 86.8 | DF | .~.~.~.~ Having interchangeable welding electrodes |
| 86.9 | DF | .~.~.~ For one-face welding |
| 87 | DF | .~.~.~ Multiple spot type |
| 88 | DF | .~.~.~ Electrode positionable along fixed bus bar (e.g., reaction bar type) |
| 89 | DF | .~.~.~ Fluid pressure actuated electrode |
| 90 | DF | .~.~.~ Plier or tong type |
| 91.1 | DF | .~.~.~ With condition responsive control of the welding process |
| 91.2 | DF | .~.~.~ Methods |
| 91.21 | DF | .~.~.~.~ Of welding through insulation |
| 91.22 | DF | .~.~.~.~ With additional heating to same spot |
| 91.23 | DF | .~.~.~.~ With work deforming |
| 92 | DF | .~.~.~.~ Current limitation (e.g., by interposed insulation) |
| 93 | DF | .~.~.~.~.~ By localized projection |
| 94 | DF | .~.~.~.~.~ By interposed button |
| 95 | DF | .~.~ Percussive |
| 96 | DF | .~.~.~ Methods |
| 97 | DF | .~.~ Flash |
| 98 | DF | .~.~.~ Stud |
| 99 | DF | .~.~.~.~ Methods |
| 100 | DF | .~.~.~ Methods |
| 101 | DF | .~.~ Butt |
| 102 | DF | .~.~.~ Extended seam |
| 103 | DF | .~.~.~ One part fed |
| 104 | DF | .~.~.~ Methods |
| 105 | DF | .~.~.~.~ Preparation of edges |
| 106 | DF | .~.~.~.~ By use of a bridging member (e.g., splice plate) |
| 107 | DF | .~.~.~.~ End or edge to surface |
| 108 | DF | .~.~ Systems of current supply |
| 109 | DF | .~.~.~ With indicator (e.g., recorder) |
| 110 | DF | .~.~.~ Controlled in response to current, voltage, or temperature |
| 111 | DF | .~.~.~ Repeat or interrupted current systems (e.g., multiple welds, multiple heated weld) |
| 112 | DF | .~.~.~ Stored energy discharge (e.g., inductive) |
| 113 | DF | .~.~.~.~ Condenser discharge |
| 114 | DF | .~.~.~ With space-discharge tube control (e.g., thyratron, ignitron) |
| 115 | DF | .~.~.~ Synchronous switching on and off |
| 116 | DF | .~.~.~ With transformer |
| 117.1 | DF | .~.~ Methods |
| 118 | DF | .~.~.~ Particular material (e.g., dissimilar, aluminum) |
| 119 | DF | .~.~ Electrodes (e.g., structure) |
| 120 | DF | .~.~.~ With cooling |
| 121.11 | DF | .~ By arc |
| 121.12 | DF | .~.~ Using electron beam |
| 121.13 | DF | .~.~.~ Welding |
| 121.14 | DF | .~.~.~.~ Methods |
| 121.15 | DF | .~.~.~ Deposition (e.g., sputtering) |
| 121.16 | DF | .~.~.~ Melting |
| 121.17 | DF | .~.~.~.~ Methods |
| 121.18 | DF | .~.~.~ Cutting |
| 121.19 | DF | .~.~.~.~ Etching or trimming |
| 121.2 | DF | .~.~.~.~.~ Methods |
| 121.21 | DF | .~.~.~ Chamber |
| 121.22 | DF | .~.~.~.~ Sealing |
| 121.23 | DF | .~.~.~.~ Monitoring |
| 121.24 | DF | .~.~.~ Nonvacuum environment |
| 121.25 | DF | .~.~.~ Shaping |
| 121.26 | DF | .~.~.~.~ With focusing |
| 121.27 | DF | .~.~.~.~ With electrode or gun structure |
| 121.28 | DF | .~.~.~ Position control |
| 121.29 | DF | .~.~.~.~ Swept or scanned |
| 121.3 | DF | .~.~.~.~ Condition responsive |
| 121.31 | DF | .~.~.~ Workpiece position control |
| 121.32 | DF | .~.~.~.~ Condition responsive |
| 121.33 | DF | .~.~.~ With fluid supply (e.g., shielding gas or coolant) |
| 121.34 | DF | .~.~.~ Power supply |
| 121.35 | DF | .~.~.~ Methods |
| 121.36 | DF | .~.~ Using plasma |
| 121.37 | DF | .~.~.~ Melting |
| 121.38 | DF | .~.~.~.~ Methods |
| 121.39 | DF | .~.~.~ Cutting |
| 121.4 | DF | .~.~.~.~ Etching |
| 121.41 | DF | .~.~.~.~.~ Methods |
| 121.42 | DF | .~.~.~.~.~ Rate control |
| 121.43 | DF | .~.~.~.~.~ With chamber |
| 121.44 | DF | .~.~.~.~ Methods |
| 121.45 | DF | .~.~.~ Welding |
| 121.46 | DF | .~.~.~.~ Methods |
| 121.47 | DF | .~.~.~ Spray coating |
| 121.48 | DF | .~.~.~ Plasma torch structure |
| 121.49 | DF | .~.~.~.~ Cooling system |
| 121.5 | DF | .~.~.~.~ Nozzle system |
| 121.51 | DF | .~.~.~.~ Gas supply system |
| 121.52 | DF | .~.~.~.~ Electrode structure |
| 121.53 | DF | .~.~.~.~ Consumable electrode |
| 121.54 | DF | .~.~.~ Control systems |
| 121.55 | DF | .~.~.~.~ Gas supply |
| 121.56 | DF | .~.~.~.~ Arc positioning |
| 121.57 | DF | .~.~.~.~ Arc ignition |
| 121.58 | DF | .~.~.~ With work holder |
| 121.59 | DF | .~.~.~ Methods |
| 121.6 | DF | .~.~ Using laser |
| 121.61 | DF | .~.~.~ Beam energy control |
| 121.62 | DF | .~.~.~.~ Condition responsive |
| 121.63 | DF | .~.~.~ Welding |
| 121.64 | DF | .~.~.~.~ Methods |
| 121.65 | DF | .~.~.~ Melting |
| 121.66 | DF | .~.~.~.~ Methods |
| 121.67 | DF | .~.~.~ Cutting |
| 121.68 | DF | .~.~.~.~ Etching or trimming |
| 121.69 | DF | .~.~.~.~.~ Methods |
| 121.7 | DF | .~.~.~.~ Hole punching |
| 121.71 | DF | .~.~.~.~.~ Methods |
| 121.72 | DF | .~.~.~.~ Methods |
| 121.73 | DF | .~.~.~ Shaping |
| 121.74 | DF | .~.~.~.~ With mirror |
| 121.75 | DF | .~.~.~.~ With lens |
| 121.76 | DF | .~.~.~ Multiple beams |
| 121.77 | DF | .~.~.~.~ With sing source |
| 121.78 | DF | .~.~.~ Beam position control |
| 121.79 | DF | .~.~.~.~ Path adjustment |
| 121.8 | DF | .~.~.~.~ Swept or scanned |
| 121.81 | DF | .~.~.~.~ Condition responsive |
| 121.82 | DF | .~.~.~ Workpiece position control |
| 121.83 | DF | .~.~.~ With monitoring |
| 121.84 | DF | .~.~.~ With fluid supply |
| 121.85 | DF | .~.~.~ Method |
| 121.86 | DF | .~.~.~ Chamber |
| 122 | DF | .~.~ Control of arc direction |
| 123 | DF | .~.~.~ Magnetic |
| 124.01 | DF | .~.~ With ignition by retraction |
| 124.02 | DF | .~.~ With gap control |
| 124.03 | DF | .~.~.~ By arc voltage |
| 124.1 | DF | .~.~ With automatic positioning of arc |
| 124.21 | DF | .~.~.~ Including work cutting |
| 124.22 | DF | .~.~.~ In response to work shape |
| 124.31 | DF | .~.~.~.~ Having carriage supported by work |
| 124.32 | DF | .~.~.~.~ Having variable welding head travel rate (e.g., gravity feed) |
| 124.33 | DF | .~.~.~.~ Having electrode angle control |
| 124.34 | DF | .~.~.~.~ By using probe means |
| 124.4 | DF | .~.~.~ In response to work position |
| 124.5 | DF | .~.~.~ In response to the transfer rate of the weld metal |
| 125.1 | DF | .~.~ With predetermined welding operation |
| 125.11 | DF | .~.~.~ For closed path welding (e.g., circumferential welding) |
| 125.12 | DF | .~.~.~ For oscillating electrode welding |
| 126 | DF | .~.~.~ Vertical work (e.g., horizontal seam in vertical wall) |
| 127 | DF | .~.~ Spot arc bonding (e.g., arc riveting) |
| 128 | DF | .~.~ With working of bonding metal (e.g., by peening) |
| 129 | DF | .~.~ Brazzing or soldering |
| 130.01 | DF | .~.~ Including circuits for monitoring arc parameters |
| 130.1 | DF | .~.~ Including arc-power supplies |
| 130.21 | DF | .~.~.~ With automatic output control (e.g., shortcircuit, infrared) |
| 130.31 | DF | .~.~.~.~ Responsive to arc voltage only |
| 130.32 | DF | .~.~.~.~ Responsive to arc current only |
| 130.33 | DF | .~.~.~.~ Responsive to both arc voltage and arc current |
| 130.4 | DF | .~.~.~ With arc ignition and stabilization arrangements |
| 130.5 | DF | .~.~.~ With predetermined time variation of arc voltage or current (e.g., programmed) |
| 130.51 | DF | .~.~.~.~ Pulsating or periodic output |
| 132 | DF | .~.~.~ Remote control |
| 133 | DF | .~.~.~ With generator (e.g., gas engine driven) |
| 134 | DF | .~.~.~.~ Electric motor driven |
| 136 | DF | .~.~ Welding |
| 137 R | DF | .~.~.~ Process |
| 137 PS | DF | .~.~.~.~ Power supply |
| 137 WM | DF | .~.~.~.~ Weld metal composition |
| 137.2 | DF | .~.~ With consumable electrode device |
| 137.31 | DF | .~.~.~ Gun |
| 137.41 | DF | .~.~.~.~ Having fume extractor |
| 137.42 | DF | .~.~.~.~ Having gas flow limiting shape (e.g., gas diffuser) |
| 137.43 | DF | .~.~.~.~ Having spatter shield |
| 137.44 | DF | .~.~.~.~ Having integral electrode guide |
| 137.51 | DF | .~.~.~.~.~ With flexibility |
| 137.52 | DF | .~.~.~.~.~ With wear resistant liner |
| 137.61 | DF | .~.~.~.~ Having filler electrical contact structure |
| 137.62 | DF | .~.~.~.~ Having cooling means |
| 137.63 | DF | .~.~.~.~ Having supply connection means (e.g., quick disconnect) |
| 137.7 | DF | .~.~.~ Rate control |
| 137.71 | DF | .~.~.~.~ Circuits |
| 137.8 | DF | .~.~.~ Including filler wire deforming |
| 137.9 | DF | .~.~.~ Supply cables (e.g., for current, shielding gas, coolant) |
| 138 | DF | .~.~ Electrode holder (e.g., spring biased tong) |
| 139 | DF | .~.~.~ Plural adjustable electrodes (e.g., hand torch) |
| 140 | DF | .~.~.~ Spring jaw (e.g., sprung by electrode) |
| 141 | DF | .~.~.~.~ With separate actuator |
| 142 | DF | .~.~.~ Plunger jaw (e.g., screw actuated) |
| 143 | DF | .~.~.~.~ Spring biased |
| 144 | DF | .~.~.~ Positive grip |
| 145.1 | DF | .~ Weld rod structure |
| 145.21 | DF | .~.~ Nonconsumable |
| 145.22 | DF | .~.~ Flux cored |
| 145.23 | DF | .~.~ Flux coated |
| 145.31 | DF | .~.~.~ Partially |
| 145.32 | DF | .~.~.~ With wire wrap |
| 145.41 | DF | .~.~ Nonmetal cover |
| 146.1 | DF | .~ Weld rod composition |
| 146.21 | DF | .~.~ Nonconsumable |
| 146.22 | DF | .~.~ Nonferrous |
| 146.23 | DF | .~.~ Containing nickel, chromium, and iron |
| 146.24 | DF | .~.~ Metal deoxidizer or denitrogenizer |
| 146.3 | DD | .~.~.~ Particulate |
| 146.31 | DF | .~.~ Particulate |
| 146.32 | DF | .~.~.~ Alloying |
| 146.41 | DF | .~.~.~.~ Nickel or chromium |
| 146.51 | DF | .~.~.~ Containing carbide |
| 146.52 | DF | .~.~.~ Shielding |
| 147 | DF | .~.~ With eye shield |
| 148 | DF | .~ Bonding |
| 149 | DF | .~ With forging or shaping (e.g., of powder) |
| 150 R | DF | .~.~ Upsetting |
| 151 | DF | .~.~.~ Anvil electrode |
| 152 | DF | .~.~.~ Simultaneous with heating |
| 150 V | DF | .~.~.~ Riveting |
| 153 | DF | .~.~ Bending or twisting |
| 154 | DF | .~.~ Subsequent to heating |
| 155 | DF | .~ Endless strip |
| 156 | DF | .~ Rods and bars |
| 157 | DF | .~ Rivets |
| 158 | DF | .~ Work holders |
| 159 | DF | .~.~ Rotating supports |
| 160 | DF | .~.~ Mandrels (e.g., anvil) |
| 161 | DF | .~.~ Clamp |
| 162 | DF | .~ Methods |
| 200 | DF | HEATING DEVICES |
| 201 | DF | .~ Combined with diverse-type art device |
| 202 | DF | .~.~ Vehicle or vehicle component |
| 203 | DF | .~.~.~ Windshield or window |
| 204 | DF | .~.~.~ Steering device |
| 205 | DF | .~.~.~ Motor or engine |
| 206 | DF | .~.~.~.~ Manifold |
| 207 | DF | .~.~.~.~ Carburetor |
| 208 | DF | .~.~.~.~ Radiator or cooling system |
| 209 | DF | .~.~ Electrical devices |
| 210 | DF | .~.~.~ Crystal or other vibratory device |
| 211 | DF | .~.~ Apparel |
| 212 | DF | .~.~ Bed covering (e.g., blanket) |
| 213 | DF | .~.~ Static structure (e.g., building pavement, etc.) |
| 214 | DF | .~.~ Vending, dispensing, or display device |
| 215 | DF | .~.~ Shoe machinery |
| 216 | DF | .~.~ Printing or reproduction device |
| 217 | DF | .~.~ Chair, bed, or other body-supporting means |
| 218 | DF | .~.~ Table or cabinet |
| 219 | DF | .~.~ Mirror |
| 220 | DF | .~.~ Light means |
| 221 | DF | .~ Tool or instrument |
| 222 | DF | .~.~ Hair heaters |
| 223 | DF | .~.~.~ Singeing apparatus |
| 224 | DF | .~.~.~ Electrolytic |
| 225 | DF | .~.~.~ With heated clamp means (e.g., hand-held) |
| 226 | DF | .~.~.~ With heated casing |
| 227 | DF | .~.~ Hand-manipulative |
| 228 | DF | .~.~.~ With heat distribution means (i.e., heat applied to extended area) |
| 229 | DF | .~.~.~ With heated tip or other heat concentration means (i.e., heat applied to localized area) |
| 230 | DF | .~.~.~.~ With tip cooling, clamping, or lighting means |
| 231 | DF | .~.~.~.~ Convertible |
| 232 | DF | .~.~.~.~ Internal arc-type heating unit |
| 233 | DF | .~.~.~.~ Tip in electrical circuit |
| 234 | DF | .~.~.~.~.~ Work in circuit |
| 235 | DF | .~.~.~.~.~ With transformer secondary |
| 236 | DF | .~.~.~.~ Coil or loop-type heating element |
| 237 | DF | .~.~.~.~.~ Integral with tip |
| 238 | DF | .~.~.~.~.~ Detachable tip |
| 239 | DF | .~.~.~.~.~.~ Threaded |
| 240 | DF | .~.~.~ With power supply, voltage or current control, or connection and/or disconnection means |
| 241 | DF | .~.~.~.~ With thermal control means |
| 242 | DF | .~.~.~ Supports |
| 243 | DF | .~ Combined with pressure application means |
| 244 | DF | .~.~ Rotatable |
| 245 | DF | .~.~ Sole plate-type pressure application means (e.g., flatiron) |
| 246 | DF | .~.~.~ Combined with stand |
| 247 | DF | .~.~.~.~ With complementary electrical connector means to external circuit terminating in stand |
| 248 | DF | .~.~.~ With condition-responsive indicator |
| 249 | DF | .~.~.~ Convertible |
| 250 | DF | .~.~.~ With power supply, voltage or current-control means |
| 251 | DF | .~.~.~.~ Thermally responsive |
| 252 | DF | .~.~.~.~.~ Adjustable |
| 253 | DF | .~.~.~.~.~ Comprising fusible metal, expansible liquid, or bar means |
| 254 | DF | .~.~.~ With heating unit structure |
| 255 | DF | .~.~.~.~ Plural heating units |
| 256 | DF | .~.~.~ With electrical circuit completion or terminal structure |
| 257 | DF | .~.~.~.~ Automatically operated |
| 258 | DF | .~.~.~ With heat storage, exchange, or reflector means |
| 259 | DF | .~.~.~ Supporting devices |
| 260 | DF | .~ Resistive element: igniter type |
| 261 | DF | .~.~ With blower, suction, or other ignition facilitating means |
| 262 | DF | .~.~ With current control or external circuit connection or disconnection means |
| 263 | DF | .~.~.~ Automatic |
| 264 | DF | .~.~.~.~ Thermally responsive |
| 265 | DF | .~.~.~.~.~ Bimetallic or other flexible means |
| 266 | DF | .~.~.~ Resilient means |
| 267 | DF | .~.~ With housing casing or support means for igniter unit |
| 268 | DF | .~.~ With source of power or current |
| 269 | DF | .~.~ With indicating means |
| 270 | DF | .~.~ With igniter unit structure |
| 383 | DF | .~ Electric arc-type devices |
| 384 | DF | .~.~ With perforating or disintegrating means |
| 385 | DF | .~ Combined with container, enclosure, or support for material to be heated |
| 386 | DF | .~.~ Portable or mobile |
| 387 | DF | .~.~.~ Food conveying type (e.g., lunch box) |
| 388 | DF | .~.~ With means whereby material to be heated may be passed continuously through heated area (e.g., conveyor) |
| 389 | DF | .~.~ Revolving enclosure |
| 390 | DF | .~.~ Muffle-type enclosure |
| 391 | DF | .~.~ Oven type |
| 392 | DF | .~.~.~ Combined with additional material support |
| 393 | DF | .~.~.~ Oven performs plural diverse functions |
| 394 | DF | .~.~.~ With plural ovens |
| 395 | DF | .~.~.~ With plurality of separate heating units |
| 396 | DF | .~.~.~.~ Of diverse construction or functioning in diverse manners |
| 397 | DF | .~.~.~.~ Of different resistive values |
| 398 | DF | .~.~.~.~ Selectively energized |
| 399 | DF | .~.~.~ With heat energy transfer, distribution, or accumulator means |
| 400 | DF | .~.~.~.~ By convection |
| 401 | DF | .~.~.~ With steam generating means |
| 402 | DF | .~.~.~ With casing or support for heating unit or units |
| 403 | DF | .~.~.~.~ Retractable or detachable (from heated enclosure) |
| 404 | DF | .~.~.~.~ Hinged or adjustable (within the heated enclosure) |
| 405 | DF | .~.~.~.~ Including heat energy reflecting or directing means |
| 406 | DF | .~.~.~ With resistance heating means surrounding heating area |
| 407 | DF | .~.~.~.~ Embedded within or between walls of container |
| 408 | DF | .~.~.~ With resistance heating unit or units fixed enclosed by or located within heating area |
| 409 | DF | .~.~.~ With heating unit structure or composition |
| 410 | DF | .~.~.~.~ With plural section heating element |
| 411 | DF | .~.~.~.~ With infrared generating means |
| 412 | DF | .~.~.~ With current or voltage control or regulating means |
| 413 | DF | .~.~.~.~ Automatically responsive to condition of heating area |
| 414 | DF | .~.~.~ With switch or other external circuit completing means |
| 415 | DF | .~.~ Deep well |
| 416 | DF | .~.~.~ Convertible |
| 417 | DF | .~.~.~ With plurality of separate heating units |
| 418 | DF | .~.~.~ With adjustable position heating unit or units |
| 419 | DF | .~.~.~ With current control or external circuit opening or closing means |
| 420 | DF | .~.~ Crucible or furnace type (i.e., adapted to hold meltable material) |
| 421 | DF | .~.~.~ Melting pot |
| 422 | DF | .~.~.~ With plural separate heating units |
| 423 | DF | .~.~.~ With protection means for heating unit or switch |
| 424 | DF | .~.~.~ With resistance heating element surrounding or embedded within walls of container |
| 425 | DF | .~.~.~ With current or voltage control means |
| 426 | DF | .~.~.~ With significant heating unit structure or composition |
| 427 | DF | .~.~.~.~ Container comprises resistance heating element |
| 428 | DF | .~.~ Plural containers |
| 429 | DF | .~.~ With vessel and stand |
| 430 | DF | .~.~.~ With heat storage or transfer means |
| 431 | DF | .~.~.~ With pressure generating or maintaining means |
| 432 | DF | .~.~.~ Vessel separable from stand |
| 433 | DF | .~.~.~ With heating unit unitary with or attached to the stand |
| 434 | DF | .~.~.~.~ Adjustable relative to vessel or stand |
| 435 | DF | .~.~.~ With external electrical circuit connection or disconnection means |
| 436 | DF | .~.~.~ With heating unit attaching or support means |
| 437 | DF | .~.~.~.~ Immersible |
| 438 | DF | .~.~ With vessel |
| 439 | DF | .~.~.~ With heat storage or transfer means |
| 440 | DF | .~.~.~ With pressure generating or maintaining means (e.g., pressure cooker) |
| 441 | DF | .~.~.~ With temperature or current control means |
| 442 | DF | .~.~.~.~ Adjustable |
| 443.1 | DF | .~.~ Exposed horizontal planar support surface for material to be heated (e.g., hot plate, etc.) |
| 444.1 | DF | .~.~.~ Material is an electronic semiconductor device |
| 445.1 | DF | .~.~.~ With indicator |
| 446.1 | DF | .~.~.~ Having sensor |
| 447.1 | DF | .~.~.~.~ Responsive to presence of material (e.g., food, a cooking vessel, etc.) |
| 448.11 | DF | .~.~.~.~ Responsive to temperature |
| 448.12 | DF | .~.~.~.~.~ Having microprocessor to control output of the heating device |
| 448.13 | DF | .~.~.~.~.~ Of material (e.g., food, a cooking vessel, etc.) |
| 448.14 | DF | .~.~.~.~.~.~ Using thermistor-type sensor |
| 448.15 | DF | .~.~.~.~.~.~ Using temperature expansible fluid-type sensor |
| 448.16 | DF | .~.~.~.~.~.~ Using bimetallic member-type sensor |
| 448.17 | DF | .~.~.~.~.~ Of the exposed horizontal planar support surface |
| 448.18 | DF | .~.~.~.~.~.~ Using bimetallic member-type sensor |
| 448.19 | DF | .~.~.~.~.~ By rod or wire in a tube (e.g., thermo-cutoff probe, etc.) |
| 449.1 | DF | .~.~.~ Heating by convection |
| 450.1 | DF | .~.~.~ For direct contact with food (e.g., grill, griddle, etc.) |
| 451.1 | DF | .~.~.~ Having support for a heating unit |
| 452.11 | DF | .~.~.~.~ Frame, casing, or housing (e.g., range top, stove top, countertop, etc.) |
| 452.12 | DF | .~.~.~.~.~ Supporting an imperforate exposed horizontal planar surface to overlie the heating unit (e.g., cooktop, etc.) |
| 452.13 | DF | .~.~.~.~.~ Convertible (e.g., to an oven, to storage, etc.) |
| 453.11 | DF | .~.~.~.~ Allowing heating unit movement |
| 453.12 | DF | .~.~.~.~.~ Enabling the exposed horizontal planar surface to conform to material having other than a planar surface |
| 453.13 | DF | .~.~.~.~.~ Using hinge for tilting or pivoting |
| 453.14 | DF | .~.~.~.~.~.~ Of pintle and gudgeon type |
| 453.15 | DF | .~.~.~.~.~.~.~ Having an axis at an acute or obtuse angle to the exposed horizontal planar surface |
| 454.11 | DF | .~.~.~.~ Bracket having a hub and three or more angularly spaced horizontal projections (e.g., a spider, etc.) |
| 454.12 | DF | .~.~.~.~.~ Having means to secure to the heating unit or a surrounding support |
| 455.11 | DF | .~.~.~.~ Pan or cup (e.g., a drip pan, etc.) |
| 455.12 | DF | .~.~.~.~.~ Reflector-type |
| 456.1 | DF | .~.~.~.~ Ring having a flange overlaying hole in a surrounding support surface |
| 457.1 | DF | .~.~.~ Having direct manually actuated electrical switch |
| 458.1 | DF | .~.~.~ Having electrical connection |
| 459.1 | DF | .~.~.~.~ Receptacle (e.g., socket, an insulator block, a terminal block, etc.) |
| 460.1 | DF | .~.~.~ Heating element gapped from underside of the exposed horizontal support surface (e.g., ceramic plate, radiation-type, etc.) |
| 461.1 | DF | .~.~.~.~ Support for the heating element |
| 462.1 | DF | .~.~.~.~ Plural heating elements |
| 463.1 | DF | .~.~.~ Formed by tubularly shaped heating unit |
| 464.1 | DF | .~.~.~.~ Having plural tubular heating units |
| 465.1 | DF | .~.~.~ Heating element contacting planar underside of the exposed horizontal planar support surface (e.g., sheet metal, etc.) |
| 466.1 | DF | .~.~.~.~ Foil or film-type of heating element |
| 467.1 | DF | .~.~.~.~ Support for the heating element |
| 468.1 | DF | .~.~.~ Heating element is embedded in the exposed horizontal planar support surface |
| 468.2 | DF | .~.~.~ Heating element is in a groove formed on underside of the exposed horizontal planar support surface (e.g., cast metal plate, etc.) |
| 469 | DF | .~.~ Cylindrical or roller-type support for material to be heated |
| 470 | DF | .~.~.~ With plural heating units |
| 471 | DF | .~.~.~ With external electrical circuit completion means |
| 472 | DF | .~ Plural functions simultaneously or convertible |
| 473 | DF | .~.~ To nonheating device |
| 474 | DF | .~.~ To diverse-type electric heating device |
| 475 | DF | .~ With plural heat utilization means (single heater) |
| 476 | DF | .~ Plural separate heating devices |
| 477 | DF | .~.~ With common power supply or current control means |
| 478 | DF | .~.~ With unitary housing, support, or casing means |
| 479 | DF | .~.~ Diverse type (each electric) |
| 480 | DF | .~.~ Selectively activated |
| 481 | DF | .~ With protective means for heater |
| 482 | DF | .~ With power supply and voltage or current regulation or current control means |
| 483 | DF | .~.~ Controlling or regulating plural separate distinct heating resistance elements(i.e., one control system for all elements) |
| 484 | DF | .~.~.~ Of diverse resistance characteristics or value |
| 485 | DF | .~.~.~ With total current or power limiting means |
| 486 | DF | .~.~.~ Selectively, sequentially or alternately |
| 487 | DF | .~.~.~.~ With indicator means |
| 488 | DF | .~.~ With voltage limitation, conversion, or adapting means |
| 489 | DF | .~.~ Combined manual and automatic regulating or control means |
| 490 | DF | .~.~ Automatic regulating or control means |
| 491 | DF | .~.~.~ Combined (e.g., electromechanical and thermal) |
| 492 | DF | .~.~.~ Comprising timing or cycling means |
| 493 | DF | .~.~.~.~ Electromechanical |
| 494 | DF | .~.~.~ Thermally responsive |
| 495 | DF | .~.~.~.~ Thermomagnetic |
| 496 | DF | .~.~.~ Pressure responsive |
| 497 | DF | .~.~.~ Comprising voltage and/or current measuring and comparing or combining means |
| 498 | DF | .~.~.~.~ Including follow-up servo means |
| 499 | DF | .~.~.~.~ Including bridge means |
| 500 | DF | .~.~.~ Including electron or glow-discharge tube means |
| 501 | DF | .~.~.~ Including semiconductor means (e.g., transistor) |
| 502 | DF | .~.~.~ Utilizing light-sensitive and/or responsive means |
| 503 | DF | .~.~.~ Inductive reactor means (e.g., auto transformer) |
| 504 | DF | .~.~.~ Comprising variable resistance means |
| 505 | DF | .~.~.~.~ Comprising nonlinear or negative temperature coefficient resistance means |
| 506 | DF | .~.~.~ With signal or indicating means |
| 507 | DF | .~ With current connection and/or disconnection means (e.g., switch) |
| 508 | DF | .~.~ Plural means intermittently or selectively operated |
| 509 | DF | .~.~ Automatically operated |
| 510 | DF | .~.~.~ Thermally responsive |
| 511 | DF | .~.~.~.~ With auxiliary heating means for thermal switch means |
| 512 | DF | .~.~.~.~ Comprising linearly expansible metal |
| 513 | DF | .~.~.~.~ Comprising expansible fluid (e.g., alcohol or mercury) |
| 514 | DF | .~.~.~.~ With solenoid means |
| 515 | DF | .~.~.~.~ Adjustable means |
| 516 | DF | .~.~.~.~ Insertable into or in direct contact with heated material |
| 517 | DF | .~.~.~.~ Fusible link |
| 518 | DF | .~.~.~ Responsive to weight, position, or presence of body to be heated |
| 519 | DF | .~.~.~ Including electromagnetic relay means |
| 520 | DF | .~ With heater-unit housing, casing, or support means (e.g., frame and single sheet) |
| 521 | DF | .~.~ Including or comprising holding or support means for material to be heated |
| 522 | DF | .~.~ Housing, casing, or support performs plural diverse functions (e.g., window) |
| 523 | DF | .~.~ Housing, casing, or support insertable into material or space to be heated (e.g., immersion type) |
| 524 | DF | .~.~ Comprising hinged or separable compartment (e.g., waffle iron type) |
| 525 | DF | .~.~.~ With plurality of or sectional heating means |
| 526 | DF | .~.~ With means for attaching housing or casing to an external device (e.g., magnetic or vacuum) |
| 527 | DF | .~.~.~ Body-supported (e.g., human body) |
| 528 | DF | .~.~ Flexible or resilient (e.g., warming pad) |
| 529 | DF | .~.~.~ Cloth or other fabric |
| 530 | DF | .~.~ With heat storage or transfer means (vanes) |
| 531 | DF | .~.~ With thermal insulation or cooling means |
| 532 | DF | .~.~ With open frame or grid-type support |
| 533 | DF | .~.~ Portable (e.g., with handle) |
| 534 | DF | .~.~ Rigid tubular housing, casing, or support (e.g., flattened tube) |
| 535 | DF | .~.~ Specially formed or adapted to fit material to be heated (e.g., a pipe) |
| 536 | DF | .~.~ With heating unit mounting or attaching means |
| 537 | DF | .~.~.~ Plural units combined with single casing housing or support |
| 538 | DF | .~ With heating unit structure |
| 539 | DF | .~.~ Comprising plural separate and distinct resistive elements |
| 540 | DF | .~.~ With heat storage or transfer means (e.g., fins or plate) |
| 541 | DF | .~.~ With terminal or connector means (e.g., to external circuit means) |
| 542 | DF | .~.~ With resistive-element attaching, securing or electrical insulation means |
| 543 | DF | .~.~.~ Comprising coating printed or deposited on core sheath or support means |
| 544 | DF | .~.~.~ Element embedded within or completely surrounded by core, sheath, or support means |
| 545 | DF | .~.~.~ Resistive element interwoven with fabric support |
| 546 | DF | .~.~ Core, sheath, or support means for heating element |
| 547 | DF | .~.~.~ Comprising material to be heated |
| 548 | DF | .~.~.~ Of particular construction or material |
| 549 | DF | .~.~.~.~ Flexible |
| 550 | DF | .~.~.~.~ Sectional or interconnectable insulator means |
| 551 | DF | .~.~.~.~ Gasket or wafer-type insulator means |
| 552 | DF | .~.~ Heating element structure |
| 553 | DF | .~.~.~ Of particular construction and/or material (e.g., infrared generator) |