H - Electricity – 01 – H
Patent
H - Electricity
01
H
340/187
H01H 13/20 (2006.01) H01H 1/06 (2006.01) H01H 13/70 (2006.01)
Patent
CA 1104235
RCA 71357/71358 SWITCH MECHANISM FOR A CALCULATOR TYPE KEYBOARD ABSTRACT OF THE DISCLOSURE A calculator type keyboard includes push-button switch contact mechanisms formed as integral parts of a con- ductive web. Each of the mechanisms includes support arms inter- secting 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 contact 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. While 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. -1-
292124
Morneau Roland L.
Rca Corporation
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