Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1980-07-09
1981-10-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
7386174, G01D 534
Patent
active
042950449
ABSTRACT:
A flow switch apparatus and method for use in determining the quantity of a beverage liquid passing through a conduit, the apparatus including a light path across the conduit and an actuator arm interposed across the light path, the actuator arm being activated by fluid flow through the conduit. The light path is formed by a light source transmitting light toward a light detector. The light detector produces an electronic signal when adequate light received by the light detector. The signal produced by the switch apparatus is in the form of digital logic voltage levels which can be monitored remotely by conventional electronic apparatus to accumulate the flow information provided by the flow switch. The conduit is adapted to be vertically oriented to accommodate the actuator arm resting under gravity in occulusion of the light path when there is no fluid flow in the conduit.
REFERENCES:
patent: 1776297 (1930-09-01), Sanderson
patent: 1967018 (1934-07-01), Bohner
patent: 2316255 (1943-04-01), Knobel et al.
patent: 3814935 (1974-06-01), Kissel
patent: 3914994 (1975-10-01), Banner
Anderson Kenneth W.
Cazier Verl O.
Summerhays Brent
Electronic Systems Engineering, Inc.
Jensen Allen R.
Nelms David C.
Workman H. Ross
Young J. Winslow
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