公开(公告)号：US3612968A

公开(公告)日：1971-10-12

申请号：US3612968D

申请日：1970-03-11

申请人： BUNKER RAMO

发明人： MARZ FRANK H

IPC分类号： G04C3/06 ,  H02K33/02 ,  H02K33/00

CPC分类号： H02K33/02 ,  G04C3/067

摘要： Permanent magnet mounted on an oscillatory arm controlled by a hairspring swings past a stationary coil having oppositely wound sensing and driving portions. Voltage induced in the sense coil by movement of the magnet triggers a transistor; pulses of current caused thereby to flow in the collector-emitter circuit of the transistor pass through the driving portion of the coil. With the coil connections shown the action is regenerative, running the transistor to saturation. The field of the drive coil imparts a mechanical force to the magnet, and maintains it in oscillatory movement.

公开(公告)号：US3620004A

公开(公告)日：1971-11-16

申请号：US3620004D

申请日：1969-09-25

申请人： BUNKER RAMO

发明人： MARZ FRANK H

IPC分类号： G03B21/44 ,  G03B1/00 ,  G04B19/20 ,  G04B19/34 ,  G04C3/00 ,  G04B19/30

CPC分类号： G04B19/34

摘要： DEVICE USING FILM WITH SUCESSIVE FRAMES BEARING DIFFERENT INDICIA, AND HAVING MEANS FOR STEP-BY-STEP ADVANCEMENT OF THE FILM IS SYNCHRONISM WITH THE PASSAGE OF TIME, WITH SUCESSIVE FRAMES PAUSING IN REGISTER WITH A FILM GATE FOR IMAGE PROJECTION OF THEIR INDICIA ONTO A SCREEN, AND THE DEVICE HAVING FURTHER PROVISION FOR MANUALLY CONTROLLED RAPID ADVANCE OR RETRACTION OF THE FILM.