Fluid-dispensing apparatus having level control and alarm means

Details Fluid-dispensing apparatus having level control and alarm means Fluid-dispensing apparatus having level control and alarm means

1975-08-01

1977-03-22

Yusko, Donald J.

Communications: electrical

Systems

Call station

128214C, 128214E, 340239R, G08B 2100

Patent

active

040140105

ABSTRACT:
The apparatus comprises a flexible tube through which fluid flows from a supply, and a opaque ball which is adjustably disposed within the tube. When fluid is first fed through the tube, an air bubble forms, and the location of this bubble is set by squeezng the tube and forcing the air bubble to an upper portion of the tube. The opaque ball rests on the top surface of the fluid in the air bubble. A photoelectric detector assembly comprising a source of light and a light detector is mounted on the tube, with the beam of light interrupted by the opaque ball. The light detector is connected to an electronic circuit which is arranged to perform no function so long as the beam of light from the source is interrupted by the ball. When all of the fluid has been fed through the tube from the source, and the level begins to drop in the tube, the opaque ball drops below the light beam and permits the light detector to receive light from the light source, and the resultant current flow operates the electronic circuit to provide a warning that the fluid has dropped below the set level and that the tube itself will be empty in a known period of time thereafter.

REFERENCES:
patent: 352647 (1886-11-01), Ghegan
patent: 3003500 (1961-10-01), Barton et al.
patent: 3150360 (1964-09-01), Stenzel
patent: 3543752 (1970-12-01), Hesse et al.
patent: 3689908 (1972-09-01), Ray

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