Thermal sensor for detection of potential mechanical failures an

Details Thermal sensor for detection of potential mechanical failures an Thermal sensor for detection of potential mechanical failures an

1994-06-09

1995-08-01

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

246169A, 340449, 340682, G08B 1706

Patent

active

054383226

ABSTRACT:
A frequency generating circuit and a cap-freeing mechanism in a bolt are responsive to a longitudinal movement of a piston in response to overheating of an associated bearing. The cap-freeing mechanism transfers a force from the piston to a cap, thereby freeing the cap from a head portion of the bolt and allowing an antenna to extend to the outside of the bolt. The frequency generating circuit is activated by a connection made between a switch and a battery of the circuit by the piston. Upon becoming activated, the frequency generating circuit sends a predetermined frequency or frequency pattern through the antenna.

REFERENCES:
patent: 4812826 (1989-03-01), Kaufman et al.

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