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. 29, 1999
Filed:
Aug. 08, 1997
Akihiro Ogura, Saitama, JP;
Masanori Tone, Saitama, JP;
Kazuo Arai, Yokohama, JP;
Tetsuhide Takeyama, Tokyo, JP;
Toshitaka Higuchi, Tokyo, JP;
Kansei Corporation, Omiya, JP;
Abstract
A transmitted illumination type meter comprises a transparent light transmitting board having both a light entering bore and a shaft passing bore formed therethrough; a translucent dial plate placed on a front surface of the board, the dial plate having a shaft passing opening mated with the shaft passing bore of the board; a movement positioned behind the board; a light source positioned within the light entering bore; a drive shaft extending from the movement to the outside of the dial plate through the shaft passing bore and the shaft passing opening; a transparent pointer connected to the drive shaft to move over a front surface of the dial plate; and an annular convex peripheral wall defining the light entering bore. The annular convex peripheral wall allows light beams from the light source to enter the board and travel in parallel in the same. A plurality of stepped annular light reflecting surfaces are formed on a rear surface of the board and arranged to be concentric with the light entering bore. The annular light reflecting surfaces reflect the light beams from the annular convex peripheral wall toward the front surface of the light transmitting board. A Fresnel lens is formed on the front surface of the board and arranged to be concentric with the light entering bore. The Fresnel lens projects the light beams from the annular light reflecting surfaces toward the dial plate.