F - Mech Eng,Light,Heat,Weapons – 23 – Q
Patent
F - Mech Eng,Light,Heat,Weapons
23
Q
327/120
F23Q 7/22 (2006.01) F23Q 7/00 (2006.01)
Patent
CA 1056022
ABSTRACT An electrical igniting unit for use with ignitor devices such as are commonly utilized in electrical cigar lighters, engine ignitor plugs, and the like comprising a heating element, such as a wound spiral of resistance ribbon, carried in an annular metal holder or cup and spanning the mouth or opening thereof. The inner end of the spiral ribbon is secured to a central metal stud as by crimping or welding it in a slotted head thereof. Means are provided for securing the outer coil convolution to the rim of the holder or cup by curling inward the rim edge into a tight curl which is laid over on the end portions of the coil convolution whereby a relatively large area of the coil end is tightly and securely pinched under con- tinual pressure to establish a low-resistance, effective me- chanical and electrical connection between the cup and the coil throughout the useful life of the latter. The advantage of the present construction over prior devices is that less expense is involved in assembly without sacrifice or reliability or long operating life.
256734
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