Optics: motion pictures – Camera and/or projector drive mechanisms – With film engaging claws reciprocally driven to engage film
Patent
1977-02-08
1978-10-31
Hayes, Monroe H.
Optics: motion pictures
Camera and/or projector drive mechanisms
With film engaging claws reciprocally driven to engage film
226 62, 226 67, G03B 122
Patent
active
041231538
ABSTRACT:
An advance mechanism for perforated materials for advancing the material through a path of light. The mechanism includes a support structure adapted to be in line with a source of light so that light passes through an aperture in the support. The perforated material is supported and advanced along a pathway into and out of alignment with the aperture. A pawl mechanism including a spring is on the support adjacent to the aperture and normally positioned in a normally retracted position in alignment with a slot adjacent to the aperture in the support. Drive structure biases the spring and directs the pawl through the slot into engagement with a perforation in the material and then along the slot a predetermined distance to advance the material and then release the pawl permitting the spring to return the pawl to the retracted position out of the slot. The pawl is then returned to the normally retracted position. The movement of the pawl along the length of the slot is restricted. A rotatable drive cylinder is on the support and an integrally formed coupling extends therefrom. The coupling is adapted to be coupled directly to the drive shaft of a motor and to prevent relative rotation of the cylinder with respect to the shaft of the motor and thereby prevent slippage between the cylinder and the drive shaft of the motor.
REFERENCES:
patent: 3264051 (1966-08-01), Melton
patent: 3306697 (1967-02-01), Nemeth
patent: 3507569 (1970-04-01), Goto
Hayes Monroe H.
Instructional Communications Technology, Inc.
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