Tunnel furnace height detector

Details Tunnel furnace height detector Tunnel furnace height detector

1989-03-24

1990-09-18

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

33544, 33832, 266 99, G01B 500, G01K 114

Patent

active

049573748

ABSTRACT:
A tunnel furnace height detector used for detecting ceiling heights of a tunnel furnace. The detector includes a plurality of detecting units arranged on a trolley traveling in the tunnel furnace in a manner such that their heights are progressively lowered by predetermined distances. Each of the detecting units includes a support base, and a solid piece pivotally connected to the support base automatically returnable from a pivotally moved position forced by an external force to an original position. The solid piece has one end in contact with a lowered ceiling and the other end closing and opening a measuring circuit system forming a closed circuit.

REFERENCES:
patent: 449920 (1891-04-01), Thom
patent: 3158364 (1964-11-01), Cremer et al.
patent: 3573444 (1971-04-01), Kawabata et al.
patent: 4483631 (1984-11-01), Kydd
patent: 4761892 (1988-08-01), Jankkila

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