Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1996-06-28
1998-09-08
Walczak, David J.
Electricity: circuit makers and breakers
Electric switch details
Actuators
200242, 200570, 200571, H01H 308
Patent
active
058032398
ABSTRACT:
A rotary switch is mounted in a housing having a hollow interior. The rotary switch includes a shaft, which rotatably extends through a male threaded mounting. The rotatable shaft defines a bore which extends from an inlet defined on an exterior surface of the shaft, through a length of the shaft. The bore communicates with an outlet defined in the exterior surface of the shaft. The outlet is disposed within the hollow interior of the housing, while the inlet of the bore is positioned external to the housing. The bore defines a passageway within the body of the shaft through which a cleaning fluid may pass. The inlet of the bore is covered by a knob which is removably secured to the shaft. A first contact is connected to the rotatable shaft. A second contact is disposed within the interior of the housing for contacting the first contact. The first contact is also disposed within the interior of the housing. The bore may be used in cleaning the contacts positioned within the interior of the housing. To clean the first contact and the second contact, the knob is removed and a tube, connected to a pressurized canister is inserted into the bore. Fluid from the canister passes through the bore and over the first contact and the second contact thereby cleaning them.
REFERENCES:
patent: 1497688 (1924-06-01), Kunkle
patent: 2045417 (1936-06-01), Siegel
patent: 2786904 (1957-03-01), Hewes et al.
patent: 4000382 (1976-12-01), Kolb
patent: 5192939 (1993-03-01), Kossow et al.
patent: 5563387 (1996-10-01), Myers et al.
Bray David William
Petro Paul Ronald
Bray David W.
Walczak David J.
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