High-temperature detecting apparatus

Details High-temperature detecting apparatus High-temperature detecting apparatus

1977-03-23

1978-09-05

Sebastian, Leland A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

73361, 136233, 307117, 340595, H01N 3500

Patent

active

041124782

ABSTRACT:
A high-temperature detecting apparatus most suitably used with a system for protecting a catalytic apparatus provided for purifying exhaust gas of an automobile is disclosed. A reed relay coil is connected between the cold junctions of a thermocouple in such a manner that the reed relay is driven directly by an electromotive force generated in the thermocouple due to heat in the exhaust gas. The thermocouple and the reed relay are integrally arranged by means of a metal cover. This arrangement reduces the connection resistance between the thermocouple and the coil, thereby making it possible to directly drive the reed relay by the output of the thermocouple.

REFERENCES:
patent: 3821562 (1974-06-01), Davis et al.
patent: 3829849 (1974-08-01), Stauffer
patent: 3883753 (1975-05-01), Harrison, Jr. et al.
patent: 3921453 (1975-11-01), Platzer, Jr.

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