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:
Apr. 13, 1976
Filed:
Jan. 30, 1975
Jean Claude Berney, Lausanne, CH;
Other;
Abstract
Apparatus for measuring the running of watches comprising an oscillator delivering a precise frequency fr coupled to a divider delivering a frequency fd, the mean value of the frequency fd being synchronized on a whole number multiple n of the frequency to be measured fm, by means of an on-off comparator which delivers a voltage +V and switches the rate of division of the divider to a value of X-Y when the signal of frequency fm is ahead of frequency fd or delivers a voltage -V and switches the rate of division of the divider to X + Y when the signal of frequency fm is behind the frequency fd. The output voltage of the comparator is applied to a resistor-capacitor network in such manner to obtain the mean value of this voltage, the mean value being proportional to the relative difference of frequency ##EQU1## WHERE FMO = FR/NX.