Force-limiting coupling apparatus

Details Force-limiting coupling apparatus Force-limiting coupling apparatus

1981-02-23

1982-03-09

Little, Willis

Electricity: circuit makers and breakers

Electric switch details

Indicators

H01H 900

Patent

active

043191088

ABSTRACT:
A close-wound coil spring moves a driven member in response to movement of a drive member. The spring is moved when one end thereof receives transverse force from the moving drive member; the other end of the moving spring transversely applies force to the driven member. If the transverse forces on the spring are less than a given amount, as when the driven member moves relatively slowly, the spring acts as a rigid lever capable of moving the driven member synchronously with, and during the same time interval as, the drive member. If the transverse forces on the spring exceed the given amount, as when the driven member moves suddenly or at high speed, the spring flexes according to Hooke's Law and moves the driven member asynchronously with, and during a different time interval from, the drive member. In the latter case, the spring's flexure limits the force applied to the driven member, preventing damage thereto.

REFERENCES:
patent: 2909940 (1959-10-01), Dawkins
patent: 3055227 (1962-09-01), Martin
patent: 4180788 (1979-12-01), Barkan
patent: 4238657 (1980-12-01), Opfer et al.

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