Pushbutton switch key arrangement for keyboards having indicia

Details Pushbutton switch key arrangement for keyboards having indicia Pushbutton switch key arrangement for keyboards having indicia

1975-09-25

1978-01-03

Scott, James R.

Electricity: circuit makers and breakers

Electric switch details

Indicators

200 5A, 200159A, 200159B, 200275, 200340, H01H 900, H01H 1314

Patent

active

040668606

ABSTRACT:
Pushbutton switch configurations are provided in which one or a plurality of pushbutton switches are formed with integrated bases, actuating springs and key top structures to facilitate fabrication of arrays of such switches in a substantially unitary matrix or in line configuration. In a preferred embodiment a metal base is etched to form spring and key top frame patterns which are press formed into key top and vertically extending supporting spring structures integral with the base plate in a desired matrix or line configuration. Epoxy or similar resin material can then be integrated with the key top frame to complete each pushbutton switch. Suitable operating indicia are press formed or etched in the key top surfaces and contrasted with resin as desired.

REFERENCES:
patent: 3582594 (1971-01-01), Twyford
patent: 3612802 (1971-10-01), Beadle et al.
patent: 3627927 (1971-12-01), Schmitz et al.
patent: 3823309 (1974-07-01), Caruso
patent: 3856998 (1974-12-01), Sims, Jr.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3932722 (1976-01-01), Obata et al.
patent: 3950846 (1976-04-01), Johnson
Long, E. E., IBM Tech. Disc. Bull., "Low-Cost Key-Top Structure for Serpentine Strip Keyboard," vol. 17, No. 5, 10-1974, p. 1479.
Yarborough, J. L., IBM Tech. Discl. Bull., "Nonteasable Switch Actuator," vol. 16, No. 5, 10-1973, pp. 1520, 1521.
Johnson, Jr., D. O., IBM Tech. Disc. Bull., "Keyboard and Wiping Contact Assembly," vol. 13, No. 7, 12-1970, pp. 1962, 1963.

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