Automatic electric cigar lighter

Electric heating – Heating devices – Resistive element: igniter type

Patent

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Details

219264, 219265, F23Q 722

Patent

active

041684222

ABSTRACT:
An automatic electric cigar lighter, particularly a cigar lighter igniting unit for automobiles and the like. The cigar lighter comprises a holder device presenting an outwardly facing socket, and a unique ignitor plug receivable in the socket. Disposed at the inner end of the plug is a heating element which is electrically connected in circuit with a heat-responsive switch that is also carried by the plug. The socket in addition to its grounding circuit has a "hot" contact which is engageable with a cooperable contact on the plug to effect the circuit through the heating element. The plug comprises a manually operable part by which the heat-responsive switch can be closed, thereby to complete the heating circuit through the element. A bimetallic member is also carried by the plug, engageable with one of the switch parts and normally lying in a circuit-opening position wherein it maintains the switch parts separated and from which it can be shifted to a closed-circuit position. In both positions it can receive radiant heat from the heating element, and when in the closed-circuit position it can snap to the circuit-opening position to effect opening of the lighter circuit and de-energization of the heating element after useful incandescence has been reached. Central portions of the bimetallic member are free and not attached anywhere to any parts of the plug, but instead are merely disposed in close proximity to one of the switch parts, such that the member can quickly effect opening of the switch without need for mechanical securement of its central portions. This eliminates problems previously associated with the usual fastenings made to a bimetallic member, such as securing a contact to the member, etc. Improved reliability and operation, together with faster operation, are thus realized.

REFERENCES:
patent: 2207462 (1940-07-01), Kurtz
patent: 2220978 (1940-11-01), Shakespeare et al.
patent: 2637799 (1953-05-01), Wood
patent: 2999142 (1961-09-01), Woodhall et al.
patent: 3258567 (1966-06-01), Colavecchio
patent: 3870857 (1975-03-01), Horwitt et al.

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