Snap action electrical switching mechanism with dual set points

Details Snap action electrical switching mechanism with dual set points Snap action electrical switching mechanism with dual set points

1992-04-30

1993-08-03

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

73745, 200 814, 200 82R, H01H 3538

Patent

active

052331423

ABSTRACT:
A first belleville spring, having a given preload, controls a translatable, elongate, contact disc assembly, to cause a shunting disc to remove from, and close into contact with a pair of circuit contacts. The assembly is disposed within a translatable carriage, and a second belleville spring having a greater preload controls translation of the carriage, to cause the shunting disc to close into contact with, and remove from, a second pair of circuit contacts. As a consequence dual set points of switching operation is provided. A fluid medium, admitted into a housing for the assembly and carriage, effects translation of the assembly and carriage.

REFERENCES:
patent: 3668347 (1972-06-01), Korsgren
patent: 3876845 (1975-04-01), Griffith
patent: 4225760 (1980-09-01), Griffith
patent: 4757165 (1988-07-01), Marcoux
patent: 4794214 (1988-12-01), Sanford
patent: 4853504 (1989-08-01), Tanaka
patent: 5004873 (1991-04-01), Schnut

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