Fluid flow sensing switch device

Details Fluid flow sensing switch device Fluid flow sensing switch device

1978-08-23

1980-12-30

Lowrance, George E.

Combustion

Timer, programmer, retarder or condition responsive control

Of igniter and feed controlled sequence

137119, 137503, 200 83A, 200830Q, 20083N, 200 6186, 251 634, 431 89, H01H 3534, H01H 3540, F23N 506

Patent

active

042420822

ABSTRACT:
A fluid flow sensing switch device having a housing provided with a fluid flow passage therethrough defined by an inlet and an outlet separated by a valve seat controlled by a movable valve member that is operated by the pressure differential between the inlet and the outlet, the device having an electrical switch construction operatively associated with the valve member and having the switch contacts thereof actuated by the pressure differential. The switch contacts of the switch construction are disposed in the fluid flow passage so as to be exposed to fluid flow therethrough and have a part thereof carried by the valve member.

REFERENCES:
patent: 1931475 (1933-10-01), Brasch
patent: 1938327 (1933-12-01), Green
patent: 2800544 (1957-07-01), Caparone
patent: 3164414 (1965-01-01), Stelzer
patent: 3475746 (1969-10-01), Nelson
patent: 3551620 (1970-12-01), Hoover
patent: 3898403 (1975-08-01), Gragson
patent: 4000386 (1976-12-01), Brouwer
patent: 4081621 (1978-03-01), Hartley

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