US PATENT SUBCLASS 123 / 149 R
.~.~ Dynamos

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

143 R  DF  IGNITERS {6}
146.5 R  DF  .~ Sparkers {11}
149 R.~.~ Dynamos {7}
149 A  DF  .~.~.~> Inductor type
149 B  DF  .~.~.~> Impulse starters
149 D  DF  .~.~.~> Flywheel type
149 E  DF  .~.~.~> Oscillating armature type
149 F  DF  .~.~.~> Special waveforms {1}
149 G  DF  .~.~.~> Movable pole shoes and bell-magnets
149 H  DF  .~.~.~> Reciprocating

Unofficial Alpha Subclasses: R A B D E F FA G H

DEFINITION

Classification: 123/149

Mechanism whereby a dynamo-electric machine is operated by an engine and is adapted to furnish a current of electricity for the purpose of igniting the successive, combustible charges supplied thereto and patents disclosing and claiming a dynamo

in combination with igniting mechanism, which, considered by itself, would be classifiable in some one of the following igniter subclasses, the connection between the two being other than by means of mere conducting-wires, and patents disclosing and claiming dynamo-electric machines having features of construction or peculiarities in mode of operation particularly adapting them for use with internal-combustion engines for the purposes of igniting the successive combustible charges supplied thereto and rendering their use in other relations or with other devices impossible, or at least unlikely. Dynamo coming within the last of the above cases are generally so intimately associated with or built into the elements constituting the engine with which they are used as to be incapable of separation therefrom and of operation or existence as separate mechanism.

(1) Note. Dynamo-electric machines complete in themselves having no element in common with an internal-combustion engine and capable when put in operation of furnishing a current of electricity available for any purpose to which the current produced by the said dynamo is suitable are classified in suitable subclasses of Class 310, Electrical Generator or Motor Structure, according to the type of device in question, and neither a positive statement in the specification to the effect that the device in question is intended to be used to furnish current for the igniting device of an internal-combustion engine nor the fact that a claim positively includes an internal-combustion engine or its igniting device in general terms will be sufficient to cause a patent for such a dynamo to be classified as an igniting device for internal combustion engines.

(2) Note. Mechanism interposed between an internal combustion engine and a dynamo driven thereby and designed to furnish current for the igniting device of such engine, the purposes of said mechanism being to maintain a constant speed of the dynamo irrespective of variations in speed of the engine, are not classified in this subclass. For such devices see Class 188, Brakes, subclasses 180+; Class 192, Clutches and Power-Stop Control, subclasses 103, 104 and 105 and Class 310, Electrical Generator or Motor Structure, subclasses 75+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, and 594+, for low tension and high tension ignition systems.

SEE OR SEARCH CLASS

290, Prime-Mover Dynamo Plants.