Safety loop for a light fixture

Details Safety loop for a light fixture Safety loop for a light fixture

2011-08-02

2011-08-02

Tran, Thuy Vinh (Department: 2821)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

C315S309000

Reexamination Certificate

active

07990673

ABSTRACT:
A light fixture and a method for control of a light fixture is supervised by at least one thermoswitch which protects the light source by disconnecting the power supply to the light source at elevated temperature. To achieve a safety circuit in a light fixture without switching the supply circuit to a light source, the at least one thermoswitch is connected to a low voltage safety loop, which safety loop is connected to a current source that generates a constant current in the safety loop. The safety loop is supervised by a current measuring device. Hereby, it is achieved that the switching, if temperature rises, is achieved by switching contacts that only carry a very limited current. This will increase the life time of the thermoswitch and very small switches can be used.

REFERENCES:
patent: 4150887 (1979-04-01), Huber
patent: 4536817 (1985-08-01), Pejouhy
patent: 4675777 (1987-06-01), Watrous
patent: 4713721 (1987-12-01), Pelonis
patent: 5077645 (1991-12-01), Habinak
patent: 5978196 (1999-11-01), O'Boyle
patent: 6349023 (2002-02-01), Greenberg
patent: 7372210 (2008-05-01), Scolaro et al.
patent: 7595595 (2009-09-01), Mehta
patent: 7605549 (2009-10-01), Mehta et al.
patent: 7737640 (2010-06-01), Marques et al.
patent: 2009/0033235 (2009-02-01), Mehta
patent: 1 577 918 (2005-09-01), None
patent: 93/01640 (1993-01-01), None

Affiliated with

Also associated with

Rating

Safety loop for a light fixture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety loop for a light fixture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety loop for a light fixture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2748329