H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/206
H01H 35/34 (2006.01)
Patent
CA 1042962
ABSTRACT OF THE DISCLOSURE An oil pressure switch comprising a housing having an inlet end connectable to an oil pressure line to admit oil from the line within the housing. A flexible membrane is secured in the housing and having opposed surfaces. One of these opposed surfaces is in contact with the oil admitted to the housing whilst the other of the surfaces is in engagement with a spring biased electrical contact. The spring biased electrical contact is in abutting engagement with a stationary electrical contact. Connection means is provided for each of the electrical contacts. The membrane is displaced by pressure in the oil line whereby the spring biased contact is caused to be displaced against its spring biased direction to cause dis- engagement with the stationary electrical contact. The flexible membrane is a flat member of flexible impervious material having a peripheral ridge of larger thickness than the major portion of the flat member. The ridge is clamped in a continuous cavity which is of larger cross-sectional area than the cross section of the ridge. The ridge is oval in cross-section with the long central axis of the oval extending transversely of the planar axis of the flat member.
231451
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