Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1982-05-25
1985-02-26
Schreyer, Stafford D.
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
2003022, 200333, H01H 902
Patent
active
045019363
ABSTRACT:
A protective cover for the push-button array of a push-button telephone set having a planar surface through the push-buttons extend, comprise a flexible elastomeric sheet having at least one recessed portion with side walls forming a pocket which overlies each of the push-buttons on said telephone set and permits individual displacement of the underlying telephone set push-buttons. The sheet has a skirt portion extending laterally beyond the side walls of the pocket and the sheet is continuous between its lateral edges, whereby the entire push-button array is overlaid by the cover and thereby protected against spilled liquids or other environmental hazards. Surrounding the sheet is a metal frame having a channel on the internal periphery into which the sheet extends and is permanently secured.
Strips of adhesive material, preferably a continuous strip, is provided on the underside of the sheet for permanently securing the sheet and metal frame to the planar surface of the telephone set to prevent its removal by unauthorized persons. A removable cover is placed over the adhesive strips which is removed before attachment of the cover to the planar surface.
REFERENCES:
patent: 1600603 (1926-09-01), Schwegler
patent: 3749870 (1973-07-01), Oakes
patent: 4028257 (1978-03-01), Bagley
patent: 4293764 (1981-10-01), Amrheim
"Keyboard Cover", Telephony, Jul. 20, 1981, p. 94.
APM Corporation
Schreyer Stafford D.
Schroeder L. C.
Weingram Edward R.
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