Condition responsive apparatus having an improved motion transfe

Electricity: circuit makers and breakers – Fluid pressure – Flow-responsive type

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Details

200 83P, 200283, H01H 3534

Patent

active

042608627

ABSTRACT:
A pressure responsive electrical switch uses precalibrated snap acting monometallic or bimetallic discs freely disposed in a disc seat formed on a base member. Over pressure protection in the form of a surface spaced just beyond the normal snapped position may be provided to avoid calibration changes. A flexible thin gasket is positioned over the disc and is sealed to the base by trapping between the base and a cap which is clamped to the base. Several seal variations are shown to provide varying degrees and types of seals. A rocker member having a specially curved surface rests on a movable contact arm and transfers motion from the disc to the movable arm. A support for the movable arm has a portion which is formed with a complementary curved portion which cooperates with the rocker member and a stationary contact to limit the amount of stress imparted to the movable contact arm. Several different embodiments of precalibrated disc switches are shown including a differential pressure switch and a switch in which the disc is part of the electrical circuit.

REFERENCES:
patent: 3230328 (1966-01-01), Chapin
patent: 3302269 (1967-02-01), Cooper
patent: 3553402 (1971-01-01), Hire
patent: 3584168 (1971-06-01), Halpert

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