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, 200 83Q, 200 83N, 200 6186, 251634, 431 89, H01H 3534, H01H 3540, F23N 506

Patent

active

042420830

ABSTRACT:
A fluid flow sensing device having a housing provided with a fluid flow passage therethrough defined by an inlet and outlet separated by a valve seat controlled by a movable valve member that is operated by a pressure differential between the inlet and the outlet acting on a flexible diaphragm carried by the housing, the device having an electrical switch construction operatively associated with the valve member and having the switch contacts thereof disposed in the fluid flow passage so as to be exposed to fluid therethrough and being actuated by the pressure differential acting on the flexible diaphragm. The switch contacts comprise a pair of spaced apart contacts carried by the flexible diaphragm and a bridging contact member carried by the valve member and being adapted to make contact with the pair of contacts and thereby bridge the pair of contacts to close the switch construction to operate electronic switching, the electronic switching being disposed inside the housing.

REFERENCES:
patent: 1931475 (1933-10-01), Brasch
patent: 2800544 (1957-07-01), Caparone
patent: 3164414 (1965-01-01), Stelzer
patent: 3475746 (1969-10-01), Nelson
patent: 4081621 (1978-03-01), Hartley

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