Bolt type seal with fiber optic seal

Details Bolt type seal with fiber optic seal Bolt type seal with fiber optic seal

1989-03-06

1991-01-08

Nicholson, Eric K.

Closure fasteners

Seal bolts

70440, 292307R, 411395, E05B 4100, E05B 3902

Patent

active

049829858

ABSTRACT:
The present invention provides a heavy duty seal for hasps and latches in combination with a light duty tamper-indicating seal, which extends through the heavy duty seal for indicating tampering or breaking of the heavy duty seal. A sheathed bundle of optical fibers extends through aligned bores in parts of a heavy duty bolt type seal. End portions of the bundle are locked in a locking block and terminal ends of the fibers are exposed in surfaces of the block for observation and indications of light transmittal.

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patent: 4717235 (1988-01-01), Kitagawa et al.
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