Telephone indicator

Details Telephone indicator Telephone indicator

1983-10-14

1985-10-01

Rubinson, Gene Z.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

179 27FC, 179 81C, 179 84L, 340365VL, H04M 122

Patent

active

045448086

ABSTRACT:
An indicator for use with a multiline telephone, which displays the status of both a local and called telephone set. The status indicator is comprised of a first indicator enclosed within a second for displaying by a shade or color the status of a called line, and a second indicator at least partly surrounding the first for partly displaying the first for displaying by shade or color with the second indicator the status of the calling line, whereby a party observing the indicator obtains simultaneous indication of the status of the calling and the called lines. Preferably the first indicator is a circle, enclosed within the second indicator which is a square, both being elements of a liquid crystal display. Each square indicator can be located next to a line access pushbutton with which it is associated.

REFERENCES:
patent: 3770898 (1973-11-01), Woodward
patent: 3906168 (1975-09-01), McEowen
patent: 3920929 (1975-11-01), Tate
patent: 3937901 (1976-02-01), Matheny
patent: 3953683 (1976-04-01), Gabrielson
patent: 4004106 (1977-01-01), Yachabach et al.
patent: 4022989 (1977-05-01), Hoppough
patent: 4212011 (1980-07-01), Waldron
patent: 4257045 (1981-05-01), Miles
patent: 4352959 (1982-10-01), Warnecke et al.
patent: 4394544 (1983-07-01), DeLeon

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