Self-monitoring seal

Details Self-monitoring seal Self-monitoring seal

1978-06-26

1981-04-14

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340507, 340542, 340691, G08B 1306

Patent

active

042622840

ABSTRACT:
Self-monitoring seals have ends of fiber optic bundle loops mounted in stressed tamper resistant containers. A battery operates microelectronics to change a display in predetermined sequence. Tampering with the container or interrupting or changing the light transmission through the fiber optic bundle disrupts the predetermined display sequence.

REFERENCES:
patent: 3588811 (1971-06-01), Prickett
patent: 3710372 (1973-01-01), Andersson et al.
patent: 3735353 (1973-05-01), Donovan et al.
patent: 3993987 (1976-11-01), Stevens
patent: 4000416 (1976-12-01), Goell

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