Telephone instrument

Details Telephone instrument Telephone instrument

1986-12-24

1988-04-05

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Substation originated

379428, 379434, 379436, H04M 102

Patent

active

047364114

ABSTRACT:
A telephone instrument comprising a handset and a base unit in which the base unit is substantially smooth on its upper surface except for a raised area having a spherical surface and a slight recess which respectively cooperate with a correspondingly formed spherically shaped indentation and a small raised semi-cylindrical portion on the handset. In this manner, the base unit provides a substantially smooth upper surface, so as not to provide any area that might retain dirt or grime. In one embodiment, the telephone instrument is formed of thermoplastic rubber and is substantially water-resistant, with all electrical components contained within the handset.

REFERENCES:
patent: D265401 (1982-07-01), Genoro et al.
patent: D277378 (1985-01-01), Cooke et al.
patent: D281687 (1985-12-01), Sakow
patent: D282739 (1986-02-01), Salovaara
patent: 2623128 (1952-12-01), Myles
patent: 3521008 (1970-07-01), Tyson
patent: 4436965 (1984-03-01), Morse
patent: 4446333 (1984-05-01), Kessler
Dracon Industries, "Our New TS-21 Test Set is Even Newer", Telephony, Nov. 20, 1978, p. 21.
"Data-Entry Keyboard is Touch Sensitive", IEEE Spectrum, p. 100A, Jan. 1978.
"PortaCom PC-8110", Data Products, pp. 1-4, 5/69.

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