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, 1979
Filed:
May. 19, 1977
Yoshiharu Ohta, Izumi, JP;
Shinji Tominaga, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A device for visually indicating the camera incident light conditions and the readiness of an associated photoflash network on a single element includes an incandescent indicating lamp connected through parallel transistors to a current source. One transistor is controlled in response to the light incident on a photoconductor to apply a steady current to the lamp when the photoconductor incident light is below a predetermined level. The other transistor is controlled by a relax action oscillator including the photoflash triggering capacitor to apply an intermittent current at a visually perceptable frequency to the lamp when the charge on the photoflash main capacitor is at least at a predetermined value. The lamp is advantageously located as to be visible through the camera view finder.