Thermally controlled valve with safety inspection feature

Details Thermally controlled valve with safety inspection feature Thermally controlled valve with safety inspection feature

1978-02-09

1980-08-05

Makay, Albert J.

Automatic temperature and humidity regulation

Thermostatic

Expanding fluid

116216, 116DIG5, 137553, 165 11R, 236 12R, G05D 2312

Patent

active

042158168

ABSTRACT:
Thermal actuating or like apparatus in which a sight conduit is comprised in a valve housing enabling the changing position of a thermal actuator within the housing to be observed from outside the housing. A fiber optic device acts as the sight conduit and provides for a display externally of the housing of color coded or like markings on the actuator. In one aspect thereof, the invention makes possible a substantially continuous comparison of the operations of redundant actuators so that an operator or user of the apparatus may be alerted to failure of one of the actuator units.

REFERENCES:
patent: 1885698 (1932-11-01), Fabbro
patent: 2189235 (1940-02-01), Wanner
patent: 3467175 (1969-09-01), O'Connor
patent: 3926368 (1975-12-01), Geen
patent: 3961184 (1976-06-01), Schurrer
patent: 4013218 (1977-03-01), King
patent: 4019567 (1977-04-01), Wixson et al.
patent: 4091280 (1978-05-01), Ellis et al.

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