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:
Mar. 30, 1982
Filed:
Feb. 12, 1979
Stephen D Parker, Erlanger, KY (US);
Fleit & Jacobson, Washington, DC (US);
Abstract
Method and apparatus for calibrating a gamma counter, such as a fibrinogen monitor, employing a pulse-height analyzer and a control circuit to determine the optimum high-voltage setting on the photomultiplier tube of a scintillation counter. A first pair of upper and lower pulse-height levels are automatically selected and counts measured to determine if the spectrum of the radioactive source is positioned correctly in the pulse-height domain. A series of measurements are made with differing high-voltage settings to ascertain the desired location of the spectrum. A second pair of upper and lower levels is provided for use in the actual monitoring operation and is automatically set after each calibration operation.