System for indicating the distance limit for flash photography
Abstract
Abstract A SYSTEM FOR INDICATING DISTANCE LIMITS TO FLASH PHOTOGRAPHY WHICH COMPRISES AN ELECTRICALLY CONDUCTIVE SURFACE PROVIDED ON A GUIDE NUMBER CHANGING MEMBER OF THE CAMERA AND A CONTACT ATTACHED TO A DISTANCE ADJUSTING MEMBER AND DISPOSED IN MATING RELATIONSHIP WITH THE CONDUCTIVE SURFACE. DURING OPERATING OF THE GUIDE NUMBER CHANGING MEMBER AND DISTANCE ADJUSTING MEMBER, THE DISTANCE BETWEEN THE CONDUCTIVE SURFACE AND THE CONTACT IS VARIED. THE CONTACT AND CONDUCTIVE SURFACE ARE BROUGHT INTO ENGAGEMENT WITH EACH OTHER TO CLOSE THE ELECTRIC CIR- CUIT OF AN ELECTRICAL MEMBER FOR INDICATING A WARNING WHEN THE DISTANCE LIMITED OF PROPER EXPOSURE FOR FLASH PHOTOGRAPHY HAS BEEN REACHED.
Inventors
- 👤 Toshio Hayashi
Bibliographic Details
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