Flame detector with test lamp and adjustable field of view

Details Flame detector with test lamp and adjustable field of view Flame detector with test lamp and adjustable field of view

1982-03-02

1985-07-16

Anderson, Bruce C.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250372, G01J 504, G08B 1712

Patent

active

045298815

ABSTRACT:
A radiation detector for use in hazardous locations, comprising an explosion proof housing with a viewing window and a detector element positioned inside the housing to receive radiation through the viewing window, and means within the housing to apply test radiation onto the external face of the viewing window directly. In one embodiment of the invention the viewing window is recessed in a housing cavity with a flared wall and the test radiation is applied from a housing portion that extends forwardly of the plane of the viewing window. In a preferred embodiment of the invention the housing is formed of front and rear portions which are rotatable in relation to each other, and the viewing window is mounted in a surface of the front portion which is inclined at a 45.degree. angle to the axis of rotation of the portions, and the rear portion has mounting means enabling mounting of the detector so that it can rotate about an axis disposed at a 45.degree. angle to the axis of rotation of the portions, thereby allowing adjustment of the detector to view in any desired direction.

REFERENCES:
patent: 3952196 (1976-04-01), Larsen
patent: 4369364 (1983-01-01), Kuntermann
patent: 4435093 (1984-03-01), Krause et al.
patent: 4464575 (1984-08-01), Cholin et al.

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