Coded data generation or conversion – Bodily actuated code generator – With rotary dial
Patent
1989-04-03
1990-11-13
Scott, J. R.
Coded data generation or conversion
Bodily actuated code generator
With rotary dial
200 11R, 200 11DA, 341 20, H03M 1100, H01H 1900
Patent
active
049705121
ABSTRACT:
A rotary switch which cooperates with a printed circuit board employs a knob member having a handle portion that protrudes through an opening in a panel of an equipment housing. The printed circuit board is spaced beneath the panel and has printed wiring contacts that are disposed along a circular path beneath the knob member. Switches which include the printed wiring contacts are opened and closed when the knob member is rotated. In one embodiment, four pairs of printed wiring contacts are disposed on the PCB at 90.degree. intervals and a spacer sheet having openings positioned at the contact pairs rests on the PCB. A contactor sheet rests on the spacer sheet and supports contactor elements that are positioned to protrude through the openings and bridge the contactor pairs when the appropriate region of the contactor sheet is depressed. Such depression is accomplished by contactor legs extending from a contactor member affixed to the underside of the knob member. A decoder circuit connected to the contact pairs provides output signals corresponding to the angular position of the knob member. Such a rotary switch is particularly useful for setting the time for appliances such electrical clocks or video cassette recorders.
REFERENCES:
patent: 2165200 (1939-07-01), Batcheller
patent: 3584163 (1971-06-01), White
patent: 3903383 (1975-09-01), Marker
patent: 4066851 (1978-01-01), White et al.
patent: 4246452 (1981-01-01), Chandler
patent: 4405841 (1983-09-01), Van Zeeland
patent: 4430540 (1984-02-01), Scalf
patent: 4435796 (1984-03-01), Saito et al.
patent: 4536628 (1985-08-01), Willhaus
patent: 4625084 (1986-11-01), Fowler et al.
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