Electronic vacuum sensor

Details Electronic vacuum sensor Electronic vacuum sensor

1994-02-18

1996-05-21

Chilcot, Jr., Richard E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73723, 128748, 128673, G01L 2700

Patent

active

055178464

ABSTRACT:
A disposable electronic vacuum sensor capable of detecting a relatively low vacuum pressure of about 0.04 to 0.05 inches of water. The sensor includes a body having an LED and an opening at one end, and a channel extending longitudinally into the body from the opening. A power source is housed within the body, and a pair of generally parallel first and second contact blades extend longitudinally through the channel. The first contact blade is attached to the upper surface of the channel and coupled to the LED, the LED is coupled the power source, and the power source is coupled to the second contact blade. The LED is activated by a high-sensitivity vacuum switch comprising the first and second contact blades and a thin flexible diaphragm extending longitudinally through the channel between the second contact blade and the lower surface of the channel. When the opening comes in contact with vacuum pressure, the pressure travels along the diaphragm and raises the diaphragm so that it contacts the second contact blade. The second contact blade is then moved upward by the diaphragm until it contacts the first contact blade, thereby completing a circuit between the LED and the power source and illuminating the LED to indicate vacuum pressure.

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