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| DF | CLASS NOTES | |
| 1 | DF | AUTOMATIC SUBSTITUTION OF DISCHARGE DEVICE, ELECTRODE OR LAMP |
| 2 | DF | .~ With current-shifting switch |
| 3 | DF | .~ Differential separation type |
| 4 | DF | .~ Common electrode-operating type |
| 5 | DF | .~.~ Electrode magazine type |
| 6 | DF | .~.~ Current- and/or potential-actuated release |
| 7 | DF | PLURAL DEVICES |
| 8 | DF | .~ Series-connected |
| 9 | DF | WITH SIGNAL, INDICATOR AND/OR ALARM |
| 10 | DF | WTH AUTOMATIC SHUNT AND/OR CUTOUT |
| 11 | DF | .~ Shunt circuit closing |
| 12 | DF | .~.~ Regulating magnet placed in the shunt |
| 13 | DF | .~.~ With compensating impedance |
| 14 | DF | .~.~.~ Feed-regulating mechanism, actuated switch |
| 15 | DF | .~.~ Current- and/or potential-actuated switch |
| 16 | DF | .~.~.~ Feed-regulating mechanism, actuated switch |
| 17 | DF | .~ Switch-operated type |
| 18 | DF | .~.~ Current- and/or potential-actuated switch |
| 19 | DF | .~.~.~ Feed-regulating mechanism, switch-actuated type |
| 20 | DF | WTH DISCHARGE-DEFLECTING MEANS |
| 21 | DF | WITH AUXILIARY MATERIAL SUPPLY TO THE DISCHARGE |
| 22 | DF | .~ Fluent material feed |
| 23 | DF | WITH ELECTRODE TIP CLEANER OR FILM-PUNCTURING MEANS |
| 24 | DF | .~ Repeated contact type |
| 25 | DF | WITH ECONOMIZER |
| 26 | DF | WITH VENTILATOR, FUME FLOW SHIELD, FUME CONDENSER AND/OR TEMPERATURE MODIFYING MEANS |
| 27 | DF | .~ Movable type, connected to the electrode or electrode-moving mechanism |
| 28 | DF | .~ Ventilator, fume director and/or condenser |
| 29 | DF | .~ Liquid-circulating type |
| 30 | DF | .~ Radiating transmitter type |
| 31 | DF | POLYPHASE A.C. SUPPLY |
| 32 | DF | WITH TRANSFORMER IN SUPPLY LINE |
| 33 | DF | THREE OR MORE SERIES-CONNECTED ELECTRODES |
| 34 | DF | WITH AUXILIARY-STARTING ELECTRODE |
| 35 | DF | WITH AUXILIARY-CONTROL ELECTRODE FOR THE ELECTRODE-MOVING MECHANISM |
| 36 | DF | PLURAL CATHODE AND/OR ANODE TYPE |
| 37 | DF | .~ Consumption feed type |
| 38 | DF | .~ Interconnectd feed operator |
| 39 | DF | OSCILLATORY AND/OR ROTARY ELECTRODE MOTION TYPE |
| 40 | DF | .~ Interconnected feeding and oscillating and/or rotating mechanism |
| 41 | DF | .~.~ Rotary motion-type power supply |
| 42 | DF | .~ Rotary electrode |
| 43 | DF | .~.~ Plural rotary electrode |
| 44 | DF | DISK OR PLATE ELECTRODE TYPE |
| 45 | DF | INCLINED OR PARALLEL ELECTRODES |
| 46 | DF | .~ Pivoted electrode |
| 47 | DF | .~.~ Plural pivoted electrodes |
| 48 | DF | .~.~.~ Linear feed |
| 49 | DF | .~.~ Linear feed |
| 50 | DF | .~ Interconnected feed operator |
| 51 | DF | PLURAL MOVABLE ELECTRODES |
| 52 | DF | .~ Plural electrode feeding |
| 53 | DF | .~.~ Interconnected operator |
| 54 | DF | .~.~.~ With separate movement of one electrode |
| 55 | DF | .~.~.~ With diverse rates of feed |
| 56 | DF | .~.~.~ Gear-, belt-, or chain-connected |
| 57 | DF | MANUAL FEED |
| 58 | DF | .~ With power drive |
| 59 | DF | CONSUMPTION FEED TYPE |
| 60 | DF | .~ Electrodes |
| 61 | DF | FLUID TRANSMISSION |
| 62 | DF | MOTOR SPEED-CONTROLLED |
| 63 | DF | RADIANT ENERGY RESPONSIVE CONTROL TYPE |
| 64 | DF | ELECTRIC DISCHARGE CONTROL CIRCUIT |
| 65 | DF | WITH ELECTRODE SEPARATING MECHANISM AND FEEDING MECHANISM |
| 66 | DF | .~ Electromagnetic separating |
| 67 | DF | .~.~ Electromagnetic feed |
| 68 | DF | POSITIVE FEED |
| 69 | DF | .~ Rotary electric motor |
| 70 | DF | .~.~ With motor-braking |
| 71 | DF | .~.~ With motor circuit impedance regulator |
| 72 | DF | .~.~.~ Switch-controlled motor circuit |
| 73 | DF | .~.~ Switch-controlled motor circuit |
| 74 | DF | .~.~.~ With regulation of switch operator |
| 75 | DF | .~.~ Auxiliary motor circuit current supply |
| 76 | DF | .~.~ Differential wound armature and/or field |
| 77 | DF | .~ Pawl and ratchet |
| 78 | DF | .~ Electromagnetic operator |
| 79 | DF | .~ Power-transmission control |
| 80 | DF | .~.~ Gear train |
| 81 | DF | .~.~.~ Reversible |
| 82 | DF | ESCAPEMENT FEED CONTROL |
| 83 | DF | DETENT OR BRAKE-CONTROLLED ROTARY FEED MEMBER OR GEAR |
| 84 | DF | .~ Movable feed frame type |
| 85 | DF | .~.~ Pivoted frame |
| 86 | DF | .~.~.~ Multiple magnet-operated |
| 87 | DF | .~ Locked during separating stroke |
| 88 | DF | .~.~ Positive-acting brake or detent |
| 89 | DF | THERMOSTATIC OPERATOR OR CONTROLLER |
| 90 | DF | .~ With mechanical energy-storing device |
| 91 | DF | WITH RESILIENT OR LOST MOTION CONNECTION |
| 92 | DF | WITH MECHANICAL ENERGY-STORING DEVICE |
| 93 | DF | .~ Rod gripper biasing type |
| 94 | DF | .~ With electric motive power |
| 95 | DF | .~.~ Biased lever |
| 96 | DF | .~.~.~ Spring-biased |
| 97 | DF | .~.~ Spring-biased |
| 98 | DF | WITH ELECTRODE COUNTERBALANCE |
| 99 | DF | WITH RETARDER |
| 100 | DF | .~ Retarded feeding type |
| 101 | DF | RELEASABLE ELECTRODE OR RODGRIPPER TYPE |
| 102 | DF | .~ Plural clutches |
| 103 | DF | .~ With separation limit stop |
| 104 | DF | .~ Magnetic clutch |
| 105 | DF | .~ Electromagnetically operated |
| 106 | DF | .~.~ Plural electromagnet coils |
| 107 | DF | .~.~.~ Three or more |
| 108 | DF | .~.~.~ Interconnected lever systems |
| 109 | DF | .~.~.~.~ Common oscillating lever or armature |
| 110 | DF | .~.~.~ Coaxial coils |
| 111 | DF | .~.~ Concentric magnet and electrode |
| 112 | DF | SLIDING ELECTRODE TYPE |
| 113 | DF | ELECTROMAGNETIC OPERATOR AND/OR FEED-CONTROLLING |
| 114 | DF | .~ With control of the electromagnet circuit |
| 115 | DF | .~.~ With current or voltage regulator |
| 116 | DF | .~.~.~ Current- or potential-responsive |
| 117 | DF | .~.~ Shunt magnet control |
| 118 | DF | .~.~.~ With control of series magnet |
| 119 | DF | .~ With electromagnetically operated separating |
| 120 | DF | .~.~ Movable coil |
| 121 | DF | .~.~ Plural coils |
| 122 | DF | .~.~.~ Three or more |
| 123 | DF | .~.~.~ Interconnected lever system |
| 124 | DF | .~.~.~.~ Common oscillating lever or armature |
| 125 | DF | .~.~.~ Coaxial coils |
| 126 | DF | .~.~.~ Opposed magnetic flux type |
| 127 | DF | .~.~ Concentric magnet and electrode |
| 128 | DF | .~ Vibration-damped electromagnet |
| 129 | DF | WITH CURRENT-TRANSFER DEVICE |
| 130 | DF | FRAMES AND ELECTRODE SUPPORTS |
| 131 | DF | .~ With electric switch |
| 132 | DF | .~ With electric impedance |
| 133 | DF | .~ With electrode guides |
| 134 | DF | .~ Adjustable electrode supports |
| 135 | DF | WITH CURRENT OR VOLTAGE REGULATOR |
| 136 | DF | MISCELLANEOUS |