F - Mech Eng,Light,Heat,Weapons – 23 – Q
Patent
F - Mech Eng,Light,Heat,Weapons
23
Q
327/120
F23Q 7/00 (2006.01)
Patent
CA 1115354
ABSTRACT An automatic electric cigar lighter for automobiles and the like, comprising a socket-presenting holder device and an ignitor plug receivable in the socket. The plug comprises a manually operable part carrying a heating element which can be electrically connected to the holder circuit, the latter having a normally open heat-responsive switch that becomes closed when the manually operable part is first pushed to a deep position in the holder device. The socket, in addition to its grounding circuit, has a "hot" contact that is engage- able with a cooperable contact on the plug to effect the cir- cuit through the heating element. The holder device also carries a bi-stable bimetallic member which is engageable with one of the parts of the normally-open switch to control the latter. The bimetallic member normally occupies an open- circuiting position wherein it abuts the one switch part to maintain the switch open. When the manually operable part of the ignitor plug is first depressed, the cooperable contact of the ignitor plug is brought into engagement with the "hot" con- tact of the socket while at the same time the bimetallic mem- ber is actuated to its close-circuiting position, this effect- ing energization of the heating element and resulting in rapid heating of the bimetallic member. After several seconds, the member snaps back to its circuit-opening position wherein it causes disengagement of the switch parts, resulting in de-ener- gization of the element. Central portions of the bi-stable bi- metallic member are free and not attached anywhere to any parts of the switch or socket, but instead are merely disposed in close proximity to the switch part, such that the member can quickly effect opening of the switch without need for mechanical securement of its central actuator portion. The advantage of the present construction over that of prior devices is that there are eliminated the many problems which were previously associated with conventional fastenings made to a bimetallic member, such as securing a contact to the member, etc. Im- proved reliability and operation, together with significantly lower manufacturing and assembly costs, are thus realized.
313951
Horwitt Laurence G.
Mattis Donald J.
Smart & Biggar
Sun Chemical Corporation
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