Portable automatic number outpulser

Details Portable automatic number outpulser Portable automatic number outpulser

1977-06-27

1978-11-21

Claffy, Kathleen H.

Communications: electrical

Land vehicle alarms or indicators

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

179 2DP, 340149R, H04M 142

Patent

active

041267680

ABSTRACT:
An automatic, portable digit outpulser for use with a telephone is disclosed. In one preferred embodiment, the outpulser resembles a credit card encasing electronic circuitry and having a low-profile acoustic device mounted on one surface of the card for acoustically coupling the outpulser to the transmitter of a telephone. Optical and mechanical coupling arrangements are also disclosed. The electronic circuitry includes a memory for storing representations of telephone digits to be outpulsed and multifrequency signal generating circuitry for generating audio frequency signals, similar to those generated by a standard telephone equipped with a multifrequency key set, in accordance with the stored digit representations. The memory also contains control data words which are individually alternated in sequence with digit words. The signal generating circuitry is directly responsive to the digit and control words for generating both digit signals and interdigital timing periods.

REFERENCES:
patent: 3806874 (1974-04-01), Ehrat
patent: 3823308 (1974-07-01), Goldberg
patent: 3859634 (1975-01-01), Perron et al.
patent: 3872435 (1975-03-01), Cestaro
patent: 3934122 (1976-01-01), Riccitelli
patent: 3976840 (1976-08-01), Cleveland et al.
patent: 4011414 (1977-03-01), Warren
"Pocket Data Terminal," Radio-Electronics, Jan., Feb. 1976, Charles Edwards.
"Wallet Terminal Keyboard With Acoustic Coupler," IBM Technical Disclosure Bulletin, vol. 10, No. 3, Aug. 1967.

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