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:
Nov. 18, 2003
Filed:
May. 24, 2002
Yoshiyuki Asakura, Aichi-ken, JP;
Honda Electronics Co., Ltd., Aichi-Ken, JP;
Abstract
A flasher type fish sonar includes an ultrasonic vibrator transmitting and receiving ultrasonic waves in water, a transmitting circuit supplying oscillating signals to the ultrasonic vibrator, a receiving circuit amplifying reflected signals received by the ultrasonic vibrator, an A/D converter converting the reflected signals to digital signals, an input circuit receiving the digital signals from the A/D converter through a control circuit, a flasher display including a rotary disk having a rotated luminous body and a display board having a window displaying luminosity of the luminous body in response to the digital signals from the input circuit through brushes and slip rings, and a constant current circuit in the input circuit which eliminates changes of electric current flowing to the luminous body due to contact resistance between the slip rings and the brushes.