Heatable windshield temperature control

Details Heatable windshield temperature control Heatable windshield temperature control

Filed on

1988-07-05

Date issued

1990-01-16

Examiner

Paschall, M. H.

Patent Class

Electric heating

SubClass

Heating devices

SubSubClass

Combined with diverse-type art device

Other Related Categories

219543, 219494, 219499, H05B 102

Type

Patent

Status

active

Patent number

048945137

Description

ABSTRACT:
A temperature control device for a heatable windshield which includes a temperature sensitive resistance member that extends into critical areas of the windshield to monitor the windshield temperature and prevent overheating. The voltage drop across the member is compared to a set voltage drop value as the windshield is powered and becomes heated. When the member's voltage drop exceeds the set value, the power to the heatable windshield is automatically interrupted to prevent overheating.

REFERENCES:
patent: 3789191 (1974-01-01), Spindler
patent: 3789192 (1974-01-01), Spindler
patent: 4057671 (1977-11-01), Shoop
patent: 4277672 (1981-07-01), Jones
patent: 4323726 (1982-04-01), Criss et al.
patent: 4434358 (1984-02-01), Apfelbeck et al.
patent: 4543466 (1985-09-01), Ramus
patent: 4565919 (1986-01-01), Bitter et al.
patent: 4577094 (1986-03-01), Mil
patent: 4610771 (1986-09-01), Gillery
patent: 4668270 (1987-05-01), Ramus

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