Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1989-02-23
1990-06-05
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 5A, 200 86R, 200306, H01H 3534
Patent
active
049316010
ABSTRACT:
Layers of a thin, electrically insulating material are bonded together to form a switch. The bottom layer of the switch has electrically conductive areas aligned with openings through a second layer. A third layer has a pattern of spaced lines of an electrical conductor positioned over the openings in the second layer. Fluid pressure applied to the bottom layer causes flexing of the bottom layer toward the third layer to bring the electrically conductive areas into contact with the pattern of conductive lines on the third layer, thereby closing the switch. A vent chamber in the second layer is pneumatically coupled to the openings in the second layer so that when the switch is closed air in the openings in the second layer can be vented to the vent chamber. The switch can be used to sense changes in fluid pressure in a water system, for example.
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Eastman Kodak Company
Tolin Gerald P.
Turner John B.
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