US PATENT SUBCLASS 29 / 602.1
.~.~ Electromagnet, transformer or inductor

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
592.1  DF  .~ Electrical device making {14}
602.1.~.~ Electromagnet, transformer or inductor {6}
603.01  DF  .~.~.~> Magnetic recording reproducing transducer (e.g., tape head, core, etc.) {4}
604  DF  .~.~.~> Data storage inductor or core
605  DF  .~.~.~> By winding or coiling
606  DF  .~.~.~> By assembling coil and core
607  DF  .~.~.~> Including permanent magnet or core {2}
609.1  DF  .~.~.~> Acoustic transducer

DEFINITION

Classification: 29/602.1

Electromagnet, transformer or inductor:

(under subclass 592.1) Process for making a device which either (1) exhibits magnetic attraction when electrical current is applied, or (2) changes the magnitude or phase of

an alternating current by inductive coupling, or (c) impedes a change of current flow by induced magnetism.

(1) Note. Included in this and the indented subclasses is a process of making a permanent magnet, that is, a magnetic body which has been magnetized, or which may later be magnetized, and an electromagnetic coil, with or without a core of magnetic material. See the Search Note below referencing this (1) Note.

(1.5) Note. For an electromagnet or transformer or a related product, see below the search notes below referencing this (1.5) Note.

(2) Note. For other classes which provide for combination of winding or coiling and coating for impregnating operations.

(3) Note. For the making of an electromagnet, inductance, or coil by a winding operation, see note (2) above, where the process or apparatus also includes coating or impregnating, and see the search notes below that reference this (3) Note for other classes and subclasses which provide for winding or coiling.

(4) Note. For making a magnet or magnetic core from comminuted materials and for the classes which provide for analogous method or apparatus for making an article from comminuted materials see the search notes below referencing this note.

(5) Note. For other classes and subclasses which provide for making magnets and magnetic cores from laminated metal, see the search notes referring to the (3) Note above, where the laminating is performed by winding operations. Also see the search notes referencing this (5) Note. (6) Note. A process of making a magnet or magnet inductance or transformer core which includes the operation of magnetizing the core and another operation are in general classified with such other operation unless the class which provides for the other operation excludes combined operations in which case the patent is classified in this or one of the indented subclasses. For example, processes of making magnets and magnet inductance or transformer cores which include the operation of magnetizing the core and another operation are, in general, classified with such other operation unless the class which provides for the other operation excludes combined operations in which case the patent is classified in this or one of the indented subclasses. For example, Class 148, Metal Treatment, subclass 100 contains many patents for significant heat treatment of metal and intentionally magnetizing

(7) Note. For other classes which provide for manufacturing process and apparatus, see the notes to the definitions of Class 29, subclasses 25.01+ and subclass 25.41 of this class. Subclasses 25.41+ provides for electric condenser making.

Subclasses 25.01+ provide for a method or apparatus for making a semiconductor or barrier layer device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25.01+, see (7) Note, above.

25.41+, see (7) Note, above.

33+, for a miscellaneous organized machine not otherwise classified adapted to perform a plurality of operations upon metal in manufacturing an electromagnet, inductor or transformer or a part thereof. (see the (3) Note above)

33+, for a miscellaneous organized machine not classified in any other class or subclass, adapted to perform a plurality of operations upon metal, including a machine designed for making an electromagnet, inductor, or transformer, or for making a part thereof. See the reference to subclasses 33+ in (3) Note, above.

598, for a miscellaneous process of making a rotor or part thereof, other than a commutator, for a dynamoelectric machine.

729+, for miscellaneous apparatus for assembling or disassembling an electrical device, including means to assemble an electromagnet, an inductance device, a transformer, or associated parts thereof. Note that indented subclass 732 provides for such apparatus for assembling a motor, a generator, or a subcombination thereof.

SEE OR SEARCH CLASS

53, Package Making, for a method of or apparatus for encompassing or encasing goods or materials with a separate cover or band which serves as means for identifying, protecting, or unit handling the goods or materials. (See (2) Note above) 53, Package Making, for a method of or apparatus for encompassing or encasing goods or materials with a separate cover or band which serves as means for identifying, protecting, or unit handling the goods or materials. (see the (3) Note above)

72, Metal Deforming,

66, 135, and 371 for wire coiling. (see the (3) Note above)

72, Metal Deforming, for a method of metal deforming, per se, and see the reference to Class 72 in (3) Note, above.

75, Specialized Metallurgical Processes, Compositions for Use therein, Consolidated, Metal Powder Compositions, and Loose Metal Particulate Mixtures, for a process of producing a metal or an alloy and

122.1, for a process of making an alloy. See the (1.5) Note and (4) Note, above.

75, Specialized Metallurgical Processes, Compositions for Use therein, Consolidated, Metal Powder Compositions, and Loose Metal Particulate Mixtures,

255+, for loose mixtures of two or more comminuted elemental metals or alloys. (see the (4) Note above)

106, Compositions: Coating or Plastic, for a miscellaneous coating, impregnating, or plastic composition.

140, Wireworking,

71+, for miscellaneous apparatus for coiling or winding wire which involves combined wire working operations. See indented subclass 92.1 for a device on or by which material, generally wire, is wound to produce a coil of predetermined form or shape, the device being mostly formers for winding an armature inductance and a electromagnet coil. Winding wire upon a stationary form is in subclass 71. Where the coil or winding is intended to be removed from the mandrel or former, or where the coil is shaped after winding, the patent is in Class 140. See Class 140, subclass 76 for making a ferrule of wire by coiling, subclass 86 for making a wire cork or stopper extractor of spiral form and, subclass 92 for making a spiral stud (shirt stud) which includes a conical of wire. (see the (3) Note above) 140, Wireworking, for a miscellaneous process and apparatus for wire working including the working of wire by banding or twisting it to form a specific article or fabric, the applying of wire to an article, and cutting, feeding, straightening and tensioning wire. See the reference to Class 140 in (3) Note above.

148, Metal Treatment,

100, 122 for a process of modifying magnetic properties of metal except as indicated in (2) Note in the definition of Class 148, subclass 100, and the appended search note to Class 29. Thus, a method consisting of working or assembling metallic material, having intended effect upon the magnetic properties of the material, combined with broad treatment in a magnetic field, is classified in subclasses 602.1+ of this class (29). See the (1) Note above. (Also see (6) Note above).

148, Metal Treatment,

300+, for metal stock having magnetic properties resulting from a process classifiable in any of subclasses 100 to 122. See the (1.5) Note above. (Also see the other references to Class 148 in the (4) Note of this subclass (602.1))

148, Metal Treatment,

104, relating to dust cores for a process that involves microstructural change wherein magnetic properties of free metal or metal alloys are developed, improved, modified, or preserved. See the (4) Note above.

148, Metal Treatment, for a miscellaneous process of treating solid metal, including magnetic material, and the resulting product. See the reference to Class 148, Notes (1.5), (4), and (6), above.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, for a process and apparatus for making a laminated article.

184, and 446, for example, include the operations of winding and adhering the windings. This reference to Class 156 should be compared with the reference to Classes 242 and 427 in this note. See (2) Note above.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, for a miscellaneous process of laminating layers with a nonmetallic adhesive. See the (5) Note above. 156, Adhesive Bonding and Miscellaneous Chemical Manufacture, for a process and apparatus for making a laminated article or fabric.

178, Telegraphy,

45, for a conductor which is provided with loading (magnetic) means and subclass 46 for the structure of induction or inductance coil for cables. See the (1.5) Note above.

241, Solid Material Comminution or Disintegration, for a miscellaneous process and apparatus for the comminution and disintegration of solid material. (see the (4) Note above)

242, Winding, Tensioning, or Guiding,

430+, for a machine or method of winding an electromagnet, transformer, or inductor coil where a coating is applied to the winding as an incident to the winding. Class 242 includes coating the wire or other material as it is being wound. This reference to Class 242 should be compared with the reference to Class 156 in this note. (See (2) Note above)

242, Winding, Tensioning, or Guiding, for apparatus or process of making by winding an article such as an electromagnet, inductor, or coil. Class 242 includes other operations incidental or essential to the winding operation. Usually in Class 242, the wire or other material is wound upon a mandrel or former upon which the wire or other material is to remain, or the wire is wound into a form such as cylinder or conoid which is analogous to the form in which wire or thread is wound for the purpose of storage. (see the (3) Note above)

242, Winding, Tensioning, or Guiding,

899, for a miscellaneous process and apparatus for making an article by winding and miscellaneous apparatus for winding or unwinding flexible material, such as wire or fabric, from a holder. See the reference to Class 242 in (2) and (3) Notes, above.

252, Compositions,

62.51, and the classes and subclasses specified in the notes thereto for a composition specialized and designed for use as magnetic material, a substance peculiar to such a composition and the process of making such a composition and substance. Subclass 62.51 also takes a process of making such a composition combined with magnetizing and/or broad molding as well as any combination these steps with a heat treating operation except where heat treatment modifies a magnetic property of a metallic component of the composition, in which case the process is classified in Class 148. See the (1.5) Note above. 252, Compositions,

62.51, for a miscellaneous magnetic composition. The notes of Class 252, subclass 62.51, refer to classes and subclasses for miscellaneous compositions containing nonmetallic materials and comminuted metals which exhibit magnetic properties. See the (4) Note above. (Also see a the (1.5) Note, above.)

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

117, for a method of forming an article by uniting of discrete bulk assembled particles. (see the (4) Note above)

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for a miscellaneous process for the working, especially by molding and casting of miscellaneous plastic materials, to make and reproduce an article of definite shape and for a process for the shaping and embossing of a sheet of miscellaneous plastic material to make an article of a definite shape including combinations with other operations, e.g., coating. Also see the (4) Note, above.

269, Work Holders, for a miscellaneous work holder.

324, Electricity: Measuring and Testing,

200, for a process apparatus for testing the magnetic properties of an article or material and also for a testing process and apparatus which utilize magnetic effects.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

209, for magnet and electromagnet structure. See the (1.5) Note above.

336, Inductor Devices, for the structure of a transformer or inductive reactor. See the (1.5) Note above. 360, Dynamic Magnetic Information Storage or Retrieval,

131, and the classes specified in the notes to the definition of that subclass for magnetic records. See the (1.5) Note above.

419, Powder Metallurgy Processes, for a process of making a compact or sintered article from comminuted metal or metal-containing composition by the application of heat or pressure without melting of the ingredients. See the (4) Note above.

420, Alloys or Metallic Compositions, appropriate subclasses for a single metal in comminuted form. (see the (4) Note above)

427, Coating Processes, for a process of coating, per se, note especially

58, for process wherein an electrical product is produced and subclass 127 for a process wherein a product having a magnetic base or coating is produced. See the (1.5) Note above.

427, Coating Processes, for a process of coating, per se, and note especially

58+, for a process wherein an electrical product is produced and subclass 127 for a process wherein a product having a magnetic base or coating is produced. See the (3) Note above.

428, Stock Material or Miscellaneous Articles,

546+, for a metal blank containing metal particles. See the (4) Note above.

428, Stock Material or Miscellaneous Articles,

432, and 457 for a plural layer product in which at least one layer is a metal and is next to a layer of nonmetal material and subclass 900 (a cross-reference art collection) for a product having a magnetic feature. See the (5) Note above.