Inertia switch for detecting impending locking of a rotary memb

Details Inertia switch for detecting impending locking of a rotary memb Inertia switch for detecting impending locking of a rotary memb

1974-07-22

1976-04-27

Scott, James R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

188181R, 200 80R, H01H 3510, B60T 800

Patent

active

039536912

ABSTRACT:
An inertia switch for detecting impending locking of a rotaty member, such as a vehicle wheel, and having a variable deceleration detection threshold has a flywheel rotatable on a shaft adapted to be driven by the rotary member, a flywheel drive element on the shaft and biased by a spring into engagement with a stop on the flywheel, the flywheel and drive element carrying respective contacts of a pair of closable contacts which are open when the drive element is engaged with the stop, and a weighted lever pivoted on the flywheel eccentrically of the shaft, and co-operable with the drive element to apply a force dependent upon the rotational speed of the flywheel to oppose closing of the contacts. A rigid link on the spring may connect a free end of the lever with the drive element, and the lever may be a bell crank having one weighted limb and a second limb which abuts against the drive element and to which the spring can be attached. The tension in the spring and the maximum separation of the contacts are adjustable.

REFERENCES:
patent: 2687047 (1954-08-01), O'Connor
patent: 2853571 (1958-09-01), Henderson et al.
patent: 2966564 (1960-12-01), Cunningham
patent: 2972027 (1961-02-01), Henry-Biabaud
patent: 2975248 (1961-03-01), Lucien
patent: 3352388 (1967-11-01), Leiber
patent: 3563350 (1971-02-01), Leiber

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