Patent GB-962746-A (GB)
Title: Cinematographic camera
Inventor: PLANERT WOLFGANG
IPC: G03B19/18
Filed: 1961-12-01
Abstract: 962,746. Cinematographic cameras; drives. KAMERA-UND KINOWERKE DRESDEN VEB. Dec. 1, 1961, No. 43069/61. Heading G2E. A cinematographic camera comprises a main drive shaft rotatable manually or by a reversible electric motor, film feed, shutter and film winding mechanisms which are drivable by a spring motor, the winding shaft of which is connected to said main drive shaft, or which are drivable by said reversible-electric motor, a first one way coupling connected between said main drive shaft and said spring motor or, in the case of the provision of said reversible electric motor, between said main drive shaft and said film feed, shutter and film winding mechanisms, and a second one-way coupling connected between said main drive shaft and an additional motor in the form of a spring mechanism wherein in one direction of rotation of the main drive shaft the first coupling effects winding of the spring motor or, in the case of the provision of said reversible electric motor, drive of the film feed, shutter and film winding mechanisms, while the second coupling remains ineffective, and in the reverse direction of rotation of the main drive shaft the second coupling effects winding of the additional motor while the first coupling remains ineffective. In a first embodiment (Fig. 1) a first spring drive motor 2 comprising a spring 7 drives the camera mechanisms (film feed, shutter and film winding-not shown) through a gear wheel 3. The spring core 6 of the motor 2 is coupled to a manual winding key 5 by way of a pin 10, a stub shaft 11, a one-way spring coupling 9 and a winding shaft 4, 4<SP>1</SP>. An additional spring motor comprising a spring 23 drives for example the adjusting mechanism (not shown) of a Zoom lens through a gear wheel 25 integral with a housing member 24. The spring core 21 of this additional motor is coupled to the same winding key 5 by way of a pin 20, a stub shaft 22, a one-way spring coupling 19, a winding shaft 16, a nut 15 and gears 12-14 (gear 13 not shown). Pawls acting on ratchet wheels 8, 26 prevent running down of the two motors. The coupling between the two motors is such that on rotating key 5 to and fro, one motor is wound by the rotation in one direction and the other motor is wound by the rotation in the other direction, In a modified embodiment (Figs. 4 and 5), a reversible electric motor 29, powered by batteries 30, drives the camera mechanisms (not shown) through a shaft 31, gear wheels 32, 33, a one-way spring coupling 36 and gear wheels 35, 37. The additional motor of this embodiment is the same as that described above, i.e. is again spring driven and includes a one-way spring coupling and a winding shaft 16. The electric motor 29 is coupled to the winding shaft 16 of this additional motor by way of the shaft 31, the gear wheel 32, further gear wheels 34, 40, a shaft 41, bevel gears 42, 43, a shaft 44, a worm 45, and a worm wheel 46. Rotation of the motor 29 in one direction operates the camera shutter and film feeding mechanism and in the other direction the winding of the spring motor.