Safety device of the friction ratchet type operable on extinctio

Details Safety device of the friction ratchet type operable on extinctio Safety device of the friction ratchet type operable on extinctio

1977-11-17

1979-08-28

Favors, Edward G.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

F23H 500

Patent

active

041659627

ABSTRACT:
A device for comprising a support bar and a holding bar formed with holes respectively extending therethrough and arranged coaxially in alignment with each other and a valve operating rod slidably extending through the holes and supported by the bars. When a heater wire is elongated by a gas flame, an auxiliary spring acts to incline the holding bar, causing the holding bar to hold the valve operating rod by the principle of friction ratchet, with the rod maintaining a stop valve in its open position. On contraction of the heater wire due to extinction of the gas flame, the holding bar returns to its original position, releasing the valve operating rod, which in turn closes the stop valve under the action of a spring.

REFERENCES:
patent: 320694 (1885-06-01), Rice et al.
patent: 1984444 (1934-12-01), Thornhill

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