Electric shutter operating mechanism

Abstract

Abstract A SHUTTER OPERATING MECHANISM COMPRISES THREE ROTARY DRIVING MEMBERS. THE FIRST AND SECOND DRIVING MEMBERS ARE COAXIAL AND ARE COUPLED BY A FIRST DRIVING SPRING. THE FIRST DRIVING MEMBER OPENS THE SHUTTER BY MOVEMENT IN ONE DIRECTION FROM A COCKED POSITION AND CLOSES THE SHUTTER BY FURTHER MOVEMENT IN THE SAME DIRECTION. THE THIRD DRIVING MEMBER IS BIASED IN A DIRECTION TO CLOSE THE SHUTTER BY A SECOND DRIVING SPRING AND IS HELD AGAINST SUCH BIAS BY THE ARMATURE OF AN ELECTROMAGNET WHEN ENERGIZED. THE SECOND AND THIRD DRIVING MEMBERS ARE COUPLED BY MODIFIED GEAR TEETH SO THAT, IN COCKED CONDITION THE SECOND DRIVING MEMBER BIASED BY THE FIRST DRIVING SPRING ACTS ON THE THIRD DRIVING MEMBER TO HOLD THE ARMATURE AGAINST THE UNENERGIZED ELECTROMAGNET. AT THE END OF THE OPENING MOVEMENT, THE RESIDUE FORCE OF FIRST DRIVING MEMBER IS DISSIPATED BY BEING DIRECTED FROM THE SECOND DRIVING MEMBER TO THE THIRD DRIVING MEMBER IN AN APPROXIMATELY RADIAL DIRECTION BY THE GEAR TEETH. UPON RELEASE OF THE THIRD DRIVING MEMBER BY THE ELCTROMAGNET, ROTATION OF THE THIRD DRIVING MEMBER BY THE SECOND DRIVING SPRING IS TRANSMITTED THROUGH THE GEAR TEETH TO THE SECOND DRIVING MEMBER AND HENCE TO THE SPRING-COUPLED FIRST DRIVING MEMBER TO CLOSE THE SHUTTER. D R A W I N G

Inventors

• 👤 K Kitai

Bibliographic Details