US PATENT SUBCLASS 335 / 53
.~.~.~.~.~ Combined with timing or delay means

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

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
47  DF  .~ Utilizing conductive liquid (e.g., mercury) {4}
49  DF  .~.~ With liquid-displacement means {3}
51  DF  .~.~.~ Magnetic {1}
52  DF  .~.~.~.~ Piston or plunger {1}
53.~.~.~.~.~ Combined with timing or delay means

DEFINITION

Classification: 335/53

(under subclass 52) Subject matter wherein the structure includes a means in addition to the plunger whereby the circuit to be controlled may be maintained open or closed for predetermined interval of time.

SEE OR SEARCH THIS CLASS, SUBCLASS:

28+, for automatic circuit interrupters with latch or trip with timing means for reclosing or resetting.

39+, for automatic circuit interrupters with magnetic latch or trip control of the time delay type.

59+, for other electromagnetically actuated switches with time delay means.

139, for step-by-step switches with timing or indexing means. 218, for magnets or electromagnets of the temperature responsive type with time delay means.

239+, for electromagnet with time delay armature movement control means.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

33+, for nonmagnetically actuated switches with time delay.