Multiple staged rotary switch

Details Multiple staged rotary switch Multiple staged rotary switch

1993-09-17

1995-07-25

Pellinen, A. D.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 11DA, 200 6R, H01H 1958

Patent

active

054364132

ABSTRACT:
A plurality of contacts for rotary switches are concentrically formed on a printed circuit board accommodated in a case. A fixed cylinder is disposed opposite to the concentric arrangement of the contacts. A rotary shaft of a first rotary knob pierces through and supports the fixed cylinder so as to drive slidable contact pieces for a first rotary switch. A rotary cylinder which functions as a rotary shaft of a second rotary knob is fitted to the outer periphery of the fixed cylinder so as to drive slidable contact pieces for a second rotary switch. Spring coils for the first and second rotary knobs are mounted on the fixed cylinder. The spring coils provide the first and second rotary knobs with tensions for their rotation reference positions. Thus, the positions of slidable contact pieces of the rotary switches are elastically maintained to their reference angle positions.

REFERENCES:
patent: 4166200 (1979-08-01), Reichen et al.
patent: 4281526 (1981-08-01), Lipschutz
patent: 4387279 (1983-06-01), Brevick
"Rotary Switches", by T. Ormond, Electrical Design News, vol. 28, No. 1, Jan. 6, 1983, pp. 99-106.

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