Rotary switch

Details Rotary switch Rotary switch

1982-10-18

1984-12-25

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 11DA, 200291, H01H 1900, H01H 2100

Patent

active

044905882

ABSTRACT:
A miniature multistage rotary switch having an injection-moulded metal casing and a threaded bushing moulded thereto for serving as the bearing of the switch spindle and for mounting the switch on a panel. Detent balls are supported inside a rotor and are pressed radially towards the outside against a ball-rest unit of the casing provided with detent grooves. In order to avoid the use of a lubricant the casing, within the area of the ball-rest unit, is made from a suitable plastics material and is firmly connected to the remaining metallic part of the casing.
An annular groove is formed in the switch metal casing inner surface. The groove includes a circular portion intersected by radial slots equal in number to the detent positions. The slots contain one or more locking pin members extending across the annular groove formation circular portion. A switch rotor stop cam rotates within the annular groove and abuts the locking pin member(s). The switch rotor operational range is determined by the spacing of one or more locking pin members.

REFERENCES:
patent: 3303313 (1967-02-01), Okamoto
patent: 3437766 (1969-04-01), Ahrens
patent: 3754106 (1973-08-01), MacDonald
patent: 3803370 (1974-04-01), Garcia
patent: 4246453 (1981-01-01), Marchese et al.

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