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:
May. 01, 1990
Filed:
Nov. 29, 1988
Applicant:
Inventors:
Hidemi Egami, Zama, JP;
Katsuo Saito, Yokohama, JP;
Hiroshi Satomura, Hatogaya, JP;
Katsuya Oikawa, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21S / ;
U.S. Cl.
CPC ...
362217 ; 362218 ; 362221 ; 355 30 ; 355 67 ; 355 71 ;
Abstract
An illumination device for causing a discharge tube to emit a light by applying a high frequency electromagnetic field thereto from outside including a high frequency wave oscillating circuit, a discharge tube, and a shield for shielding the oscillating circuit and the discharge tube to prevent the adverse effect of high frequency noise. When used in an original reading apparatus of the movable optical system type, the portion of the illumination device from the high frequency wave oscillating circuit to the discharge tube is reciprocally moved as a unit with the shield.