Choked condition detector for an air-purifying device

Details Choked condition detector for an air-purifying device Choked condition detector for an air-purifying device

1974-10-02

1976-06-15

Caldwell, John W.

Electricity: circuit makers and breakers

Electric switch details

Indicators

55274, 55DIG34, 116114PV, 340239F, H01H 300, G01D 1300

Patent

active

039638910

ABSTRACT:
The invention relates to a device for detecting the choked condition of an air purifier in which the device comprises a casing having a first compartment in pressure relation with said purifier and a second compartment in relation to atmospheric pressure, an indicator connected to a diaphragm between said compartments and a switch inserted in the supply circuit of an electric indicator device and actuated by said diaphragm, locking and unlocking means being provided so as to maintain said switch in the closed position and to liberate said switch from said closed position. The invention permits the remote indication of internal pressure of an air purifier of an internal combustion engine, so as to indicate the degree of fouling or choking of this purifier, even when the engine is stopped.

REFERENCES:
patent: 1094279 (1914-04-01), Wagner
patent: 3397395 (1968-08-01), Pierce
patent: 3443365 (1969-05-01), Lee et al.
patent: 3678881 (1972-07-01), Shinn

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