The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 1991
Filed:
Nov. 20, 1990
Applicant:
Inventors:
George A Higgins, Hagley, GB;
Kevin R McWilliams, Stratford-upon-Avon, GB;
Assignee:
Germamaspeed Limited, Droitwich, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219464 ; 219448 ;
Abstract
A radiant electric heater has one or more infra-red image (22, 24) having a relatively high temperature coefficient of resistance. To reduce the inrush current when the lamps are first energized, a series resistance coil (54) is provided together with circuitry (64, 68, 70) to bypass the series resistance after a short time interval. Because the energy dissipated in the coil is relatively limited. It can be concealed beneath a peripheral insulating well (18) of the heater.