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:
Feb. 26, 1985
Filed:
Jan. 05, 1982
James A Nicholas, Scarsdale, NY (US);
Richard Krukowski, Chatham, NJ (US);
Other;
Abstract
A portable manual muscle tester has an external actuator, a case capable of being held in one hand and a digital display indicating peak force applied to the actuator. Strain gages connected in a bridge circuit are located on a flexure contacted by the actuator. The flexure is a cantilever beam shaped to fit the small case and to prevent reflected or mounting stresses being registered in the force display. The circuit from the strain gage bridge to the display includes an instrumentation amplifier followed by a peak freeze circuit that includes operational amplifiers and a peak freeze capacitor. The peak freeze capacitor provides a voltage that is read by a digital volt meter. A further operational amplifier connected as an integrator feeds back from the peak freeze circuit to an input of the instrumentation amplifier to reset the meter to zero after the displayed force reading has been noted.