Intermittent drive for surveillance camera
Abstract
Abstract THE SURVEILLANCE CAMERA WHEN STARTED TAKES A SERIES OF STILL PICTURES IN RELATIVELY RAPID PROGRESSION. A CONTINUOUSLY ROTATED SHUTTER DISC HAS A SLIT APERTURE IN EXPOSURE POSITION ABOUT ONE-THIRD OF THE TIME. THE FILM SPROCKET IS ADVANCED DURING THE TIME WHEN THE SHUTTER IS CLOSED BY A SIMPLE GEAR MECHANISM. THE DRIVEN GEAR CONNECTED TO THE SPROCKET IS A COMPLETE GEAR AND THE DRIVING GEAR SYNCHRONIZED WITH THE SHUTTER IS MULTILATED GEA. A SIMPLE YIELDING MOUNTING FOR THE MUTILATED DRIVING GEAR CONSTITUTED THE SOLE MEANS FOR ENSURING PROPER MESHING OF THE GEARS. A BELT TRANSMISSION BETWEEN THE SPROCKET AND THE TAKEUP SPOOL ENSURES AGAINST THE IMPOSITION OF ANY TENSION ON THE FILM DURING EXPOSURE THAT MIGHT CAUSE A BLURRED IMAGE.
Inventors
- 👤 Bernard F Mcnamee
Bibliographic Details
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