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:
Jul. 20, 1976
Filed:
May. 13, 1974
Sachio Ohmori, Yokohama, JA;
Kouichi Takahata, Tokyo, JA;
Nippon Kogaku K.K., Tokyo, JA;
Abstract
A data photographing system has a flash capacitor which is charged by a power source and discharged through a flash tube in response to a trigger signal for illuminating data, and has a control circuit for producing the trigger signal only if the flash capacitor has been charged to a predetermined voltage level. The control circuit includes a voltage detector, such as a Zener diode, and a synchronizing switch adapted to be closed in response to actuation of the shutter release mechanism of the camera. The control circuit may also include a trigger capacitor which is charged by the power source and which is discharged through the primary winding of a transformer to produce a trigger signal of stepped-up voltage across the secondary winding of the transformer. The trigger capacitor may be discharged directly through the Zener diode and the synchronizing switch or through an SCR controlled thereby.