US PATENT SUBCLASS 335 / 140
.~.~ Ratchet and pawl-type actuator

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
140.~.~ Ratchet and pawl-type actuator

DEFINITION

Classification: 335/140

(under subclass 138) Subject matter wherein the structure includes ratchet and pawl type mechanical operating means under the control of an armature or armatures whereby the contacts are actuated to and from a closed condition in a step-by-step manner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123, for devices in which a plurality of sets of contacts are actuated selectively or sequentially operated by ratchet and pawl means.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism, appropriate subclasses, particularly

575+, for specific machine elements and mechanisms of the pawl and ratchet type. 200, Electricity: Circuit Makers and Breakers,

61.69, for a circuit maker or breaker whose cycle of operation corresponds to more than one opening and closing of a closure means.

340, Communications: Electrical,

825.65+, for remote controlled signalling devices with pulse counting means, subclasses 309.1+ for systems which are timer controlled.

361, Electricity: Electrical Systems and Devices,

160+, for electric circuits for relays or electromagnets utilizing a time delayed operating switch.