US PATENT SUBCLASS 335 / 139
.~.~ With timing or indexing means (e.g., clock mechanism)


Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
138  DF  .~ Step-by-step type (e.g., closure responsive to predetermined number of control pulses {2}
139.~.~ With timing or indexing means (e.g., clock mechanism)


DEFINITION

Classification: 335/139

(under subclass 138) Subject matter wherein the structure includes means whereby the successive steps take place at definite intervals, after a predetermined time or in a given order or whereby it is possible to determine the interval during which the contacts are held in the make or break condition after arrival in that condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30, for automatic circuit interrupters with mechanical motor controlled (e.g., clock movement) latch or trip setting delay means.

64+, for retarded or delayed type switches wherein the contact actuation takes place after a predetermined interval governed by a motor of clock work mechanism.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, 410, for rotating contact type snap switches operating in a step-by-step manner whereby the movable contact member is rotated by a series of pulses.

236, Automatic Temperature and Humidity Regulation,

76, for control and regulating systems utilizing step-by-step actuation of an electric motor.

307, Electrical Transmission or Interconnection Systems,

141, for switch actuation means with time delay which may employ step-by-step switch actuation means.