Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1981-09-14
1984-01-03
Brown, Thomas W.
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
200 6BB, 200303, H01H 904, H01H 2102, H04M 108
Patent
active
044244207
ABSTRACT:
A pivoval switch mechanism usable as the hookswitch of a telephone instrument. The switch mechanism includes a transverse camshaft supported between actuating arms of an actuating lever. The camshaft carries a plurality of transversely spaced contact spring operating cams, each cam positioned between respective contact springs of a spring pair. The camshaft is journaled adjacent its transverse ends within bearing openings of an enclosing housing, the housing enclosing the camshaft, cams and contact springs. The contact springs are leaf springs resting in two parallel arrays of slots in the housing, the springs being identical. The spings each have an angled ridge contactor positioned to engage a ridge on a like spring member spaced therefrom.
REFERENCES:
patent: 2068713 (1937-01-01), Schellenger
patent: 2262306 (1941-11-01), Thompson
patent: 2566840 (1951-09-01), Krumreich
patent: 3637953 (1972-01-01), Ru/ ster et al.
patent: 3974347 (1976-08-01), Lockard
"Dial and Hook Switch for Model 601 Telephone Set", by M. Murakami, Rev. of the Elec. Comm'n. Labs., vol. 26, No. 9-10, (Sep.-Oct. 1978), pp. 1312-1317.
Brown Thomas W.
International Telephone and Telegraph Corporation
O'Halloran John T.
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