Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1976-12-06
1978-04-11
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 1R, 200 67DB, 200159A, 200159B, 200275, H01H 1320, H01H 106
Patent
active
040840719
ABSTRACT:
A calculator type keyboard includes push-button switch mechanisms formed as integral parts of a conductive web. Each of the mechanisms includes support arms intersecting in a crisscross configuration only a portion of which is deformed in a dome-like contour. Contact blades extend from the intersection of the support arms and have ends coupled to adjacent support arms by bridge members. As the switch mechanism is depressed to various degrees, the supported contact blades make contact with respective binary code conductors, the dome-like contour deflects through a snap action position and finally the apex of the dome-like contour makes contact with a centrally located flag contact. Although closure of the contact blades and code conductors is maintained, radial wiping movements of the contact blades across the surfaces of the code conductors occur.
REFERENCES:
patent: 3600528 (1971-08-01), Leposavic
patent: 3742157 (1973-06-01), Leposavic
patent: 3777082 (1973-12-01), Hatley et al.
patent: 3941964 (1976-03-01), Yoder
patent: 3952174 (1976-04-01), Boulanger et al.
patent: 3973091 (1976-08-01), Kaminski
patent: 3979568 (1976-09-01), Johnson
patent: 3987259 (1976-10-01), Larson
patent: 3996429 (1976-12-01), Chu et al.
patent: 4029916 (1977-06-01), Chu
Emanuel Peter M.
Rasmussen Paul J.
RCA Corporation
Scott James R.
Whitacre Eugene M.
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