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:
Aug. 22, 1978
Filed:
Jun. 27, 1977
Kenneth W Robbins, Wilmington, MA (US);
Gerald F Ross, Lexington, MA (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
The operating characteristics of deep well pumping equipment in a geothermal well power-generation system are observed by cooperating sensor and communication elements permanently associated with the geothermal well equipment itself. Bridge circuit sensors detect well water temperature and water pressure below and above the pump, while a further sensor detects pump rotational speed. The data is transmitted by a multiplexing acoustic communication link coupled to receiver and display means located at the earth's surface. An electrical generator driven at the pump speed serves as the rotational speed pick off and additionally supplies multiplexing and signal processor power for use at the down-well site. The signal processor includes novel diode circuits in each bridge sensor channel for monitoring the operation of the individual sensors and their common power source, thereby providing a surface display of the parameter being measured by a particular sensor channel and additionally providing a calibrating display of the operating status of that channel.