Identification device

Communications: electrical – Continuously variable indicating – With meter reading

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Details

340572, 343 65SS, 235449, G01S 956, H04Q 700, H04Q 900

Patent

active

043330720

ABSTRACT:
A closed coupled identification system for verifying the identity of an animal, object or other thing, has a probe including a circuit adapted to be connected to a source of alternating current and a separate, preferably miniature, circuit adapted to be implanted within or attached to the animal, object or thing. The probe circuit is held adjacent the implanted circuit for mutually inductively coupling the circuits so that a load applied to the implanted circuit has an effect on the current in the probe circuit. A programmable load is included in the implanted circuit, along with means for sequentially connecting and disconnecting the load to and from the implanted circuit in response to alternating current cycles in the probe circuit, according to a predetermined code program. A signal is derived from the probe circuit having a waveform corresponding to the coded program in the implant circuit. Further means are employed to decode the waveform and to display a number or other representation corresponding to the code program and indicating the identity of the implanted circuit, and, hence of the animal, object or thing.

REFERENCES:
patent: 3299424 (1967-01-01), Vinding
patent: 3689885 (1972-09-01), Kaplan
patent: 3752960 (1973-08-01), Walton
patent: 3816709 (1974-06-01), Walton
patent: 3859624 (1975-01-01), Kriofsky
patent: 3898619 (1975-08-01), Carsten
patent: 3964024 (1976-06-01), Hutton
patent: 4068232 (1978-01-01), Meyers
patent: 4087791 (1978-05-01), Lemberger
patent: 4114151 (1978-09-01), Denne
IBM Tech. Dis. Bull., vol. 20, No. 7, Dec. 1977, "Externally Powered Semiconductor Trans.", Dillon et al.

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