(under subclass 51) Devices in which a switch is automatically operated upon engagement or disengagement of the complementary coupling parts.
(1) Note. This subclass includes, for example, lamp sockets wherein upon removal of the lamp therefrom, a switch automatically opens the circuit of the socket contacts, thus preventing short-circuiting of the socket contacts by tools, foreign matter, etc., or preventing shock by accidental touching of the contacts.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51.07+, for connector coupling devices in which a circuit is made or broken by relative motion of a coupling member with respect to a complementary coupling member without completely separating the coupled parts.
SEE OR SEARCH CLASS
439, Electrical Connectors,
135+, and especially subclasses 137+ for connectors having movable nonuse covering means operable upon disengagement of the coupling parts to cover or prevent access to any contact thereof; and subclasses 310+ for an electrical connector having a "dead" contact actuated after mating.
