Shutter mechanism

Details Shutter mechanism Shutter mechanism

1977-01-28

1978-09-12

Griffin, Donald A.

G03B 908

Patent

active

041141750

ABSTRACT:
The shutter mechanism includes an aperture-unblocking member mounted for movement between an unactivated aperture-blocking position and an activated aperture-unblocking position. A cocked drive mechanism is coupled to the aperture-unblocking member and is operative when released for moving the member from the unactivated to the activated position. An inertial braking mechanism is driven by the drive mechanism when the latter moves the aperture-unblocking member to the activated position, and is operative during such movement for applying to the drive mechanism an inertial braking force slowing the movement of the aperture-unblocking member to the activated position. The drive mechanism includes a drive cam, and the inertial braking mechanism includes a driven cam. The surface of the drive cam bears upon the surface of the driven cam and transmits to the driven cam the drive force by means of which the drive mechanism drives the inertial braking mechanism. The cams are so configured that, as the drive mechanism drives the inertial braking mechanism, the surface of the drive cam rolls along the surface of the driven cam.

REFERENCES:
patent: 3575097 (1971-04-01), Gonzalez
patent: 3810225 (1974-05-01), Nakamura
patent: 3982256 (1976-09-01), Ohmori et al.

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