William W Gosselin

US Patent:

7180039, Feb 20, 2007

Filed:

Aug 18, 2005

Appl. No.:

11/161829

Inventors:

Jonathan B. Arold - Exeter NH, US
William H. Gosselin - York ME, US
Michael J. Frappier - Concord NH, US
Joseph P. Stark - Newfields NH, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01H 37/12
G01K 7/02

US Classification:

219519, 219494, 219482, 219542, 219546, 374110, 374182, 392360, 392365, 392379, 392478

Abstract:

A heater is provided that has a temperature sensing control system which can be used for both temperature control and over-temperature protection against element burnout. The temperature control system is comprised of an inlet temperature sensing assembly positioned at the inlet to the heater element and an exit thermocouple positioned in the exit end of the heater element. The exit thermocouple may be used for control the heater temperature and provide over-temperature protection. The inlet temperature sensing assembly is used to detect low or no air flow conditions which could lead to heater element failure.