(under subclass 51.09) Devices in which separation of the coupling members automatically close a switch, usually to "short-circuit" the contacts of one of the coupling members.
(1) Note. This subclass includes, for example, (a) lamp sockets for series lighting systems having switching means automatically operable upon removal of the lamp to "short-circuit" the contacts of the socket thus permitting the remainder of the lamps in series therewith to remain lit, and (b) connector couplings used in train-line signaling
systems in which separation of the coupling members causes the contacts of one of the coupling members to come together, thus completing a circuit for signaling or other purposes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51.11, for connector coupling devices having independent manually operated switching means for short circuiting the contacts of one of the coupling members.
118, for connector coupling devices having shunt-circuit closing means automatically operable in response to an over-load in the circuit.
SEE OR SEARCH CLASS 439, Electrical Connectors,
188, for an electrical connector having a circuit interrupting provision effected by mating or having a "dead" contact actuated after mating; and see Lines With Other Classes and Within This Class in this class (Class 200) definition. Search subclasses 507+ for a jumper to be temporarily inserted across an electrical flow path having means for matching or interengaging union with such connector to divert or shunt the flow of electricity so as to shorten the path and/or to preserve the circuit continuity.
