Thermal sensor for detection of potential mechanical failures and transmission of temperature warning signals
US5438322A · kind A · utility
21Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1994 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Jun 9, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61K9/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.