Optical card-key data connector

Details Optical card-key data connector Optical card-key data connector

1984-07-06

1988-08-23

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

70278, 3408253, H04Q 100

Patent

active

047664339

ABSTRACT:
A card-key device with an embedded microprocessor is able to communicate with a computer-based security system via an optical connection. The optical connection is made by linking a light-emitting diode with a phototransistor through a "light tunnel" created by a mechanical connection. Electromagnetic sensors and grippers are used to assure each side of the connection that a valid connection has been made, as well as to supply power to the card-key on-board microprocessor. The card-key's on-board microprocessor can be used to retrieve an identifying number, to store data for the security system, or to perform other data transformation functions for the security system.

REFERENCES:
patent: 2170287 (1939-08-01), Kinnebrew
patent: 3683239 (1972-08-01), Sturman
patent: 3786391 (1974-01-01), Mathauser
patent: 3808577 (1974-04-01), Mathauser
patent: 3810258 (1974-05-01), Mathauser
patent: 4211456 (1980-07-01), Sears
patent: 4250533 (1981-02-01), Nelson
patent: 4288780 (1981-09-01), Theodoru et al.
patent: 4500881 (1985-02-01), Beane
R. T. Chase et al., "Security Identification and Lock-Actuating Device", IBM Tech. Disc. Bulletin, vol. 11, No. 7, Dec. 1968, pp. 738, 739.

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