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. 20, 1977
Filed:
Jun. 04, 1975
Yasunobu Yagita, Maisaka, JA;
Keisuke Honda, , JA;
Abstract
A scanning circuit consisting of a plurality of time delay circuits and a plurality of holding circuits at least equal in number to the delay circuits is provided for a fish detecting sonar. In response to the input pulse applied to the input terminal of the first stage delay circuit in synchronism with the sound pulse propagated, the delay circuits are triggered to reproduce the input pulses which are sequentially delayed by a time interval equal to the pulse width of the input pulse, and the output pulses from the delay circuits are held only by the holding circuits to which are applied the recording or echo signals. The output pulses held by the holding circuits are picked up by a brush, which slides over the contacts connected to the output terminals, respectively, of the holding circuits, and applied to a recording pen or stylus for recording. The above arrangement permits the recording or display even when the speed of the brush is relatively slow.