Electricity: circuit makers and breakers – Solid contact – Push button operated
Patent
1990-08-20
1991-11-05
Cusick, Ernest G.
Electricity: circuit makers and breakers
Solid contact
Push button operated
200530, 200534, 200536, 200241, H01H 302, H01H 1314, H01H 136
Patent
active
050632760
ABSTRACT:
A plunger axially depressible within a tubular housing against a return spring has a conductive pin contact contained within a helically shaped slot through the plunger to project radially from opposite sides of the plunger. A spring biases the pin toward a first pair of stationary contacts. Depression of the plunger effects abutting engagement of the pin on the stationary contacts and continued depression causes the slot to rotationally wipe the pin on the stationary contacts. A conductive washer is slidably disposed over the plunger, keyed to a helical track on the exterior surface of the plunger to cooperatively abut and subsequently rotationally wipe a second pair of stationary contacts to provide a second pole for the switch.
REFERENCES:
patent: 2065904 (1936-12-01), Meuer
patent: 2083118 (1937-06-01), Goldstone
patent: 2155765 (1939-04-01), Meuer
patent: 2422097 (1947-06-01), Hansen
patent: 2605375 (1950-05-01), Ellithorpe
patent: 3104300 (1963-09-01), Hutt
patent: 3539749 (1970-11-01), MacPheat
patent: 4650935 (1987-03-01), Ootsuka et al.
IBM Tech. Discl. Bull., vol. 15, No. 1, 6-1972.
Cusick Ernest G.
Eaton Corporation
Vande Zande L. G.
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