Rotary switch with redundant contacts

Details Rotary switch with redundant contacts Rotary switch with redundant contacts

1998-04-22

2000-01-04

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

200 37R, 200 38C, H01H 3500

Patent

active

060113251

ABSTRACT:
A rotary switch for providing deicing power to the heaters of a helicopter rotor includes a conductive rotor with conductive protrusions located thereon. Conductive fingers are arranged such that a pair of conductive fingers are in electrical communication with a pair of conductive protrusions for a given position of the conductive rotor. The pair of conductive fingers are in electrical communication with the heaters of a helicopter rotor such that if one the pair of electrical fingers fails to make electrical contact with its respective conductive protrusion electrical power is still delivered to the heater.

REFERENCES:
patent: 4144930 (1979-03-01), Ferdelman
patent: 4292502 (1981-09-01), Adams
patent: 4346269 (1982-08-01), Slavin et al.
patent: 4493954 (1985-01-01), Kimmel et al.
patent: 4581500 (1986-04-01), Henderson et al.

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