Cigar lighter igniting unit

申请号 US49829474 申请日 1974-08-19 公开(公告)号 US3892944A 公开(公告)日 1975-07-01
申请人 SUN CHEMICAL CORP; 发明人 HORWITT LAURENCE G; MATTIS DONALD J;
摘要 Our invention comprises a ''''pop-out'''' igniting unit adapted for use with the socket or receptacle portion of an electric cigar lighter of the type mounted in automobile instrument panels. Our unit has the usual knob at the outer end and a convolutely-wound electric heating coil at the inner end with a spacer tube therebetween. The heating coil is surrounded and enclosed on the side adjacent the spacer tube by a conductive cup. The cup has inwardly projecting lanced shoulder portions, circumferentiallyspaced to support the coil in a manner to provide coil ventilation. The spacer tube is mounted within a cylindrical friction sleeve which also serves as a guide member. The spacer tube is held in retracted relation within the sleeve by an internally mounted coil spring. The sleeve is telescoped within a cylindrical ashguard which moves axially to enclose the heating element when the igniting unit is removed from the receptacle. The spacer tube has an annular partition adjacent the heating coil cup which is provided with closely spaced peripheral indentations in which corresponding projections on the cup are adapted to be engaged, with a deformable layer of insulating material therebetween, such engagement occurring without manual assistance during assembly.
权利要求
1. A low-cost, automated-production, automatic electric cigar lighter igniting unit comprising, in combination: a. a metal plug body having a stamped, sheet-metal heating element cup insulatedly carried on its inner end, said cup constituting one contact of an electrical heating element circuit and the metal plug body constituting another contact of said circuit, b. said cup having integral, projecting, heating-element support means formed in its side walls at locations spaced backward from the edge of the cup, and c. an electrical heating element constituted of spirally-wound resistance ribbon disposed in said cup and having its ends connected respectively to the plug body and cup to be energized therethrough, d. at least one outer convolution of said element being disposed in front of and closely adjacent the element support means and being adapted to contact the same to provide a back-up for the element when pressure is exerted against the opposite or frontal side thereof, e. the convolutions of the heating element having a non-linear cross-sectional configuration and interlocking with each other to form a compact, substantially disk-like member the portions of which resist relative axial displacement, f. said integral, heating-element support means of the cup comprising a plurality of lanced, inwardly-protruding projections engageable with the element at spaced intervals around the circumference of the cup and providing openings in said side walls at the rear of the heating element.
2. A low-cost, automated-production, automatic electric cigar lighter igniting unit as in claim 1, wherein: a. the lanced projections of the heating element cup have a curvilinear cross-sectional configuration.
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