JOHN HALL
Real Estate Appraisers in Nutley, NJ
License number
New Jersey 42RC00134400
Issued Date
Aug 26, 1996
Expiration Date
Dec 31, 2015
Category
Real Estate Appraisers
Type
Cert Residential Appraiser
Address
Address
Nutley, NJ
Professional information
John Hall, Nutley NJ
Work:
Century 21
Nutley
(973) 661-3808
Nutley
(973) 661-3808
Discharge Lamp With Automatic Shut Off
US Patent:
4629939, Dec 16, 1986
Filed:
Dec 21, 1984
Appl. No.:
6/684519
Inventors:
Stephen W. Jaworowicz - Horseheads NY
John F. Hall - Nutley NJ
John F. Hall - Nutley NJ
Assignee:
North American Philips Lighting Corporation - New York NY
International Classification:
H01J 744
US Classification:
315 73
Abstract:
A high intensity discharge lamp with a safety switch which automatically shuts off the lamp upon rupture of the outer envelope. The switch is formed by a carbon rod disposed in the interior space between the arc tube and the outer envelope and connected in series with one of the electrodes so that the current flow through the rod maintains it at an elevated temperature during operation of the lamp. Upon rupture of the outer envelope, the carbon rod oxidizes and falls, thereby interrupting the electrical path to the electrodes.