Limit switch operating shaft return spring damping device

Details Limit switch operating shaft return spring damping device Limit switch operating shaft return spring damping device

1975-06-25

1976-09-28

Hohauser, Herman J.

Electricity: circuit makers and breakers

Limit switch

200153K, 74107, H01H 316

Patent

active

039833437

ABSTRACT:
An improved limit switch operator head assembly is disclosed. The assembly includes a rotatable operating shaft which is rotatable in reverse switch commutating directions, and a helically coiled torsion spring for effecting return of the operating shaft to a center or non switch commutating position. It further includes a U-shaped member formed of thin spring steel which is held in friction producing abutting relation against the coils of the torsion spring to damp the snap-back action of the latter and thereby prevent reverse rotations of the operating shaft beyond its center position.

REFERENCES:
patent: 3649785 (1972-03-01), Dietrich
patent: 3793492 (1974-02-01), Duncan et al.

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