Modular telephone keyset structure

Details Modular telephone keyset structure Modular telephone keyset structure

1980-10-06

1983-03-01

Rubinson, G. Z.

179 1PC, 179 99R, 179178, 179179, H04M 102

Patent

active

043755844

ABSTRACT:
A modular telephone keyset instrument is arranged within a rectangular casing having indentations in the top for receiving a telephone handset. Electrical (electronic) circuits are provided on a mother PC board, a daughter PC board and a key switch PC board, stacked within the housing from bottom to top, respectively. The daughter and keyset PC boards are connected to the mother PC board by ribbon cables. A hook switch, mounted on and attached to the daughter PC board extends through one of the indentations in the top to sense whether the telephone handset is placed in the indentations.

REFERENCES:
patent: 3727168 (1973-04-01), Henschen et al.
patent: 3881071 (1975-04-01), Willis et al.
patent: 3916103 (1975-10-01), Morrell et al.
patent: 3941951 (1976-03-01), Engstrom et al.
patent: 4277652 (1981-07-01), Branden et al.
patent: 4292477 (1981-09-01), Adams et al.
Rolm Telecommunications Brochure; Rolm Corporation; Santa Clara, California; Apr. 1979.
Northern Telecom Brochure; "The SL-1 in Profile;" Northern Telecom; Sep. 1977.
"The Dimension Console: Something for Everyone;" Bell Labs Record; vol. 54, No. 9; p. 239-243; Oct. 1976.
H. Hansbauer & S. Schon; "Modular Telephone User Equipment Line;" Siemens Telefon report; Nos. 2-3; pp. 73-83; Mar. 1973.

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