Chimney obstruction detection apparatus

Details Chimney obstruction detection apparatus Chimney obstruction detection apparatus

1982-06-15

1984-05-29

Corbin, John K.

350308, G02B 718

Patent

active

044511205

ABSTRACT:
An inspection apparatus for furnace flues and chimneys includes a reflecting plate biasly coupled, at its lower end to an interior wall of the flue. The reflecting plate is urged, by the bias coupling, to a non-use position adjacent the interior wall of the flue. The plate is moved to its reflecting or use position, within the interior of the flue, by the movement of a connecting rod operatively connected to the reflecting plate. In the reflecting plate use position, light entering the flue from the top is reflected to a sight glass in the flue wall. The absence of reflected light from the reflecting plate indicates an obstruction of the flue.
Also disclosed is a modular inspection device for use with existing furnace flues.

REFERENCES:
patent: 2408495 (1946-10-01), Wager
patent: 2852979 (1958-09-01), Hund

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