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:
Oct. 07, 1986
Filed:
Apr. 22, 1985
Wen H Ko, Cleveland Hts., OH (US);
Gong-Jong Yeh, Cleveland, OH (US);
The North American Manufacturing Company, Cleveland, OH (US);
Abstract
There is provided an improvement in a pulsating radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency, means responsive to pulses of radiation at the frequency for creating a control signal related to the received radiation and a driving circuit for pulsating the radiation emitting means in the series circuit. The improvement comprises a modification of the driving circuit to produce voltage pulses in the series circuit at a time base width less than the reciprocal of the frequency (in seconds), with means for sensing current flow in the series circuit, means for limiting current flow in the series circuit and means for adjusting the pulse width continuously as an inverse function of the sensed circuit whereby short distinct pulses can be created for better discrimination and accuracy in the detector system.