Spring lock knob assembly

Details Spring lock knob assembly Spring lock knob assembly

1977-12-19

1980-05-06

Wyche, Benjamin

Machine element or mechanism

Control lever and linkage systems

Elements

74553, 74554, 74504, 188166, 192 95, 192 76, G05G 516, G05G 110, F16D 1314

Patent

active

042010969

ABSTRACT:
A knob assembly comprising a cup-shaped knob shell having therein a coaxial pair of oppositely wound coil springs disposed for binding engagement with a surrounding wall of a race and having respective terminal end portions engaging an encircled portion of an axially rotatable bushing which is provided with fastening means for rotatably engaging an axially inserted shaft, the springs having other terminal end portions engaged by respective oppositely rotatable lever arms mounted on the bushing and having end portions aligned with axially spaced projections of the knob shell, whereby axial movement of the shell causes the projections to pivot the lever arms in opposite angular directions to release the coil springs windingly from binding engagement with the wall of the race and permit rotation of the bushing and engaged shaft in response to rotary movement of the knob shell.

REFERENCES:
patent: 1159717 (1915-11-01), Scott
patent: 3774571 (1973-11-01), Shimanckas
patent: 3837441 (1974-09-01), Uno et al.
patent: 4012966 (1977-05-01), Lieberman et al.
patent: 4036079 (1977-07-01), Pratt

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