Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Reexamination Certificate
2007-04-17
2010-10-05
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
Reexamination Certificate
active
07808760
ABSTRACT:
An electrical device including a heat sensing circuit interrupter to enable a load to be selectively coupled to or disconnected from a power source in accordance with a level of a sensed temperature includes a relay assembly operable between a closed state when the sensed temperature is below a predetermined limit temperature, thereby enabling the coupling of the load to the power source, and an open state when the sensed temperature is above the predetermined limit temperature, thereby electrically disconnecting the load from the power source. The device further includes a sensor assembly including a light source operatively associated with a light sensor. The light sensor is configured to be sensitive to specific levels of the sensed temperature and the light source is configured to emit light along a plurality of optical paths at any one of a plurality of wavelengths sensitive to temperature. The light sensor is further configured to sense temperature at any one of a plurality of operating points on the electrical device and trigger the relay assembly between the closed state and the open state.
REFERENCES:
patent: 3740613 (1973-06-01), Strachan
patent: 4255655 (1981-03-01), Kikuchi
patent: 4372693 (1983-02-01), Lutz
patent: 4537560 (1985-08-01), Emeterio et al.
patent: 5262749 (1993-11-01), Kopelman
patent: 5825602 (1998-10-01), Tosaka et al.
patent: 5995350 (1999-11-01), Kopelman
patent: 6049143 (2000-04-01), Simpson et al.
patent: 6477021 (2002-11-01), Haun et al.
patent: 6707652 (2004-03-01), Engel
patent: 6802747 (2004-10-01), Orange
patent: 6948846 (2005-09-01), Engel
patent: 2005/0212646 (2005-09-01), Watchorn
patent: 2006/0028316 (2006-02-01), Fabian et al.
patent: 550 863 (1932-05-01), None
patent: 2 312 767 (1976-12-01), None
patent: 2 292 850 (1996-03-01), None
patent: 2393043 (2004-03-01), None
patent: 61 014529 (1986-01-01), None
patent: WO 97/03480 (1997-01-01), None
PCT International Search Report for PCT/US/2007/009433 dated Dec. 20, 2007.
PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority for PCT/US2007/007596, dated Sep. 10, 2007.
Jackson Stephen W
Tutunjian & Bitetto, P.C.
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