Telephonic communications – Supervisory or control line signaling – Substation originated
Patent
1988-08-26
1989-09-12
Dwyer, James L.
Telephonic communications
Supervisory or control line signaling
Substation originated
379368, 379388, 379 40, 341 23, 341 28, 40337, H04M 127
Patent
active
048667641
ABSTRACT:
A telephone has a first keypad provided with conventionally numbered touch tone keys. A second keypad has a plurality of transparent keys, each provided with a slot for the insertion of a small picture or symbolic representation. Optical fiber may be embedded in each of the transparent keys for illuminating the pictures. The telephone is provided for use with a conventional handset or as a speaker phone. Each of the keys in the second keypad are connected to actuate the speaker phone section of the telephone. The keys of the second keypad are each associated with a memory for the assignment of a telephone number associated with the picture or symbolic representation inserted within the key slot. A large emergency 911 key is also provided. The telephone is designed for use by small children.
REFERENCES:
patent: D221951 (1971-09-01), Kindley
patent: D275480 (1984-09-01), Thalmair
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patent: D284662 (1986-07-01), McKenzie et al.
patent: 2853585 (1958-09-01), Danziger et al.
patent: 4385212 (1983-05-01), Tyler
patent: 4680790 (1987-07-01), Packard et al.
patent: 4720849 (1988-01-01), Tayama
D. O. Johnson, Jr., "Keyboard with Changeable Encoding and Key Designation," IBM TDB, vol. 13, No. 7, 12-1970.
Dwyer James L.
Kearns Jerry T.
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