Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1974-08-05
1976-03-30
Borchelt, Archie R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73301, 73304R, 250209, 250214DC, 340244R, G01F 2322
Patent
active
039476928
ABSTRACT:
A digital transducer comprises a container having two disparate materials therein defining an interface, the interface being movable through the container responsive to a force, or forces, applied to one, or both, of the materials. A plurality of sensors are spaced along the container for sensing the interface, each of which is responsive to the presence of one of the materials. Means are included for suppressing the outputs of all of the sensing means responsive to the one material except that one sensing means which is responsive to the one material and nearest the interface.
REFERENCES:
patent: 3186224 (1965-06-01), Mair
Article in "IZV Inst. Elektron," (Bulgaria), Vol. 5, 1971, pp. 167-172, by M. Marinov, A Contact Levelmeter with Transistor Converter in Decimal Code.
Borchelt Archie R.
LaRoche E. R.
Viron E. Payne, Inc.
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