Internal-combustion engines – Charge forming device – Heating of combustible mixture
Patent
1982-08-16
1984-01-10
Lazarus, Ronald H.
Internal-combustion engines
Charge forming device
Heating of combustible mixture
219206, 261142, F02M 3100
Patent
active
044247877
ABSTRACT:
An encapsulated PTC heater for a cold-start carburetor comprises a ceramic PTC wafer having ohmic terminal means on its opposite faces, and a thickened annular rim portion adapted to withstand appreciable clamping forces. The rim has portions of said ohmic terminal means. An annular metal holder assemblage has opposite ring portions overlying said thickened rim portion, and has ring-like contacts engaged with the rim portion to bring current thereto. One of the ring-like contacts is nested in an insulating annulus to isolate it from the remainder of the metal holder assemblage, and has a terminal lug extending through an insulating bushing to the exterior. The other ring-like contact is resilient in nature, and is clamped against the rim portion of the wafer by lugs of an annular metal housing constituting part of the holder assemblage. The resilience of the ring-like contact, in conjunction with the thickened rim portion of the wafer enable crimping or folding of the clamping lugs to be effected for assembly purposes without cracking of the wafer, and insure reliable contact being made to the wafer at all times.
REFERENCES:
patent: 1472233 (1923-10-01), Taylor
patent: 4177778 (1979-12-01), Naitou
patent: 4279234 (1981-07-01), Marcoux
patent: 4308845 (1982-01-01), Sarto
patent: 4345569 (1982-08-01), Hattori
patent: 4359974 (1982-11-01), Igashira
patent: 4362142 (1982-12-01), Igashira
patent: 4387676 (1983-06-01), Couceiro
patent: 4387690 (1983-06-01), Chiavaroli
Berlow Cynthia
Lazarus Ronald H.
Sun Chemical Corporation
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