Protected sensor for granular materials

Details Protected sensor for granular materials Protected sensor for granular materials

1981-10-13

1985-03-05

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

73304C, 324 61P, G08B 2100

Patent

active

045034249

ABSTRACT:
An apparatus for detecting the presence of granular material at a predetermined location in conduit adapted to contain the flow of granular material and in containers adapted to store granular material, wherein the upper portion of a sensing terminal is embedded in a protective housing. The protective housing has a material deflecting surface formed thereon and the lower portion of the sensing terminal protrudes from the protective housing opposite the material deflecting surface. The sensing terminal is adapted to exhibit a change in at least one of its electrical characteristics when the lower portion is in communication with granular material. Means are provided for mounting the protective housing and sensing terminal in a predetermined orientation relative to the container or conduit wall so that the flow of granular material is substantially diverted away from the lower portion of the sensing terminal.

REFERENCES:
patent: 1164882 (1915-12-01), Sommer
patent: 2316875 (1943-04-01), Laboulais
patent: 2774959 (1956-12-01), Edelman et al.
patent: 3013256 (1961-12-01), Damast
patent: 3879644 (1975-04-01), Maltby
patent: 4208909 (1980-06-01), Maltby et al.
Sales brochure--Turck MultiProx, Inc. entitled "Capacitive Proximity Switches".
Article entitled, "Capacitive Sensing" from Machine Design, May 15, 1980, pp. 304-305.
Sales brochure--Omron Electronics, Inc. entitled, "Proximity Sensor".
Sales brochure--Endress & Hauser, Inc. entitled, Vibratol "Electronic Level Control for Solids".
Sales brochure--National Soncis Corporation entitled "The Product Adviser".

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