The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1988
Filed:
May. 16, 1985
Joseph A Volk, Chesterfield, MO (US);
Joseph A Volt, Jr, Florissant, MO (US);
Chusak Tansuwan, Los Altos, CA (US);
Beta Raven Inc., Earth City, MO (US);
Abstract
An ultrasonic speed sensor produces a linear voltage directly proportional to the speed of material falling through a chute and contacting a plate. A transducer coupled to the plate produces a second linear voltage which is directly proportional to the force applied to the plate by the material as it impacts the plate. An electronic dual slope integrator circuit combines these two linear DC voltages to produce a digital pulse output whose frequency is directly proportional to the flow rate of the material. The digital pulse output may be used to drive a totalizer which totals the amount of material flowing through the chute, and an indication meter to provide an instantaneous readout of the flow rate.