US PATENT SUBCLASS 335 / 48
.~.~ Comprising three or more electrodes or circuit-completion 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}
48.~.~ Comprising three or more electrodes or circuit-completion means

DEFINITION

Classification: 335/48

(under subclass 47) Subject matter wherein the structure includes a plurality of three or more electrodes through which a current may enter or leave the liquid or other contact means whereby at least two or more external electrical circuits may be completed through the device.

(1) Note. Devices which, in fact constitute a plurality of separate mercury switches supported in a single group and which, may or may not depend upon a single magnet for actuation, are considered to come within the above subclass definition as special mercury switches. Devices of this type will have the original placed here and an official cross-reference placed in subclasses 159+ below.

(2) Note. Normally patents having the original classified here or in any other of the special type groups below will not be crossed down into the general multiple contact subclasses 106+ below, unless the disclosed subject matter discloses contact structure which may be of general utility in switches other than the special type with which it is disclosed or claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for automatic circuit interrupters of the polyphase or multiple type.

11, for automatic circuit interrupters of the plural switch type. 60, for retarded or delayed type electromagnetically actuated switches which complete plural circuits alternately, consecutively or selectively.

72, for switches with plural contacts.

88+, for periodically operative switches with means for completing plural circuits.

106+, for multiple type switching devices not restricted to the specific types listed above.

152, for plural vacuum or sealed switches.

159+, for plural switches.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

1+, for multiple circuit switches in general, subclasses 19.06+ for periodic switches of the multiple contact type, and subclass 32 for periodic switches with liquid contact.