192 clutches and power-stop control – Clutch and brake – Sliding operation
Patent
1976-08-11
1978-03-07
Wyche, Benjamin W.
192 clutches and power-stop control
Clutch and brake
Sliding operation
192 95, 74554, G05G 102, F16D 6702
Patent
active
040775038
ABSTRACT:
This knob assembly comprises a knob housing slidable on a body contained therein, and fixed to a centrally located control shaft. The body has means controlled by springs, to frictionally engage a disc non-rotatably keyed to a panel for said control shaft. Normally the knob housing can be freely spun, but when it is pushed in, it is lockingly engaged with the body whereby rotation of the pushed in knob housing will rotate the shaft with friction drag imposed on rotation of the shaft to thereby prevent inadvertent rotation of the shaft after setting of the angular position of the shaft. A spring causes the knob housing to pull out to disengage the knob housing from the body, to allow the knob housing to substantially spin freely again. The springs which cause friction between the body and the keyed disc, are stronger than the spring which pulls the knob housing out or returns it to normal when the knob housing is released. To assemble the knob housing with the control shaft, the disc is first non-rotatably keyed to the control shaft panel. The knob housing is then pushed toward the panel, compressing the springs which impose friction drag on the disc, thereby reducing clearance between the disc and body, while the knob housing is pushed in. The body is fixed to the shaft to maintain the close clearance condition between the body and the disc when the forward pressure on the knob housing is thereafter released. The knob housing return spring disengages the knob housing from the body. A retaining ring on the knob housing engages the disc to limit its outward movement when pressure on the knob housing is released.
REFERENCES:
patent: 2787353 (1957-04-01), Spraragen
patent: 2829538 (1958-04-01), Mueller
patent: 3873066 (1975-03-01), Opyrchal
patent: 3986409 (1976-10-01), Tripp et al.
Lieberman Lester
Oddo Ralph
Felshin J. B.
Jan Hardware Manufacturing Co., Inc.
Wyche Benjamin W.
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