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:
Jun. 14, 1977
Filed:
May. 10, 1976
Akira Kikuyama, Ena, JA;
Kazutoshi Ichinose, Ena, JA;
Ricoh Watch Co., Ltd., Tokyo, JA;
Abstract
A high precision timepiece pace measuring device wherein a first mask circuit inhibits the entry of a first signal of the timepiece so as to initiate a measurement of the pace of the timepiece from a second signal of the timepiece, while a second mask circuit inhibits the entry of timepiece signals, external noises and the like during a period from a time at the initiation of the measurement to a time immediately before the termination thereof, wherein a counter circuit which receives the timepiece signals as its inputs is connected to a nine's complement presetting circuit, to a carry detecting circuit and to normal and nine's complement circuits which are respectively selected in accordance with the presence and absence of a carry in the counter circuit, and wherein output pulses of the counter circuit are fed back via a counter matrix circuit so as to set the mask period of the second mask circuit.