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:
Sep. 04, 1979
Filed:
Dec. 21, 1977
Tetsuo Yamaguchi, Yokohama, JP;
Abstract
A chronograph includes a reference time counter for measuring a reference time upon receipt of a reference pulse, a plurality of short time counters for measuring a short time difference occurring between runners upon receipt of the reference pulse, a reference pulse control circuit for controlling the supply of the reference pulse to these counters, and an addition circuit for adding the contents of the reference counter to those of the short time counters successively in response to each addition command. The reference pulse control circuit selects either of the reference counter and the short time counters successively in response to each operation of a first switch of a time measuring operator and further supplies the reference pulse to only the selected counter. The reference time counter stores the resultant time resulting from the addition made responsive to each addition command through the operation of a second switch by a single time measuring operator. The resultant time is sequentially displayed through a display circuit so that a single operator can measure the times of a plurality of runners.