Film advance and rewind mechanism
AssigneeKeystone Camera Corporation
InventorsArthur Zawodny, Jerzy Krysicki
Life of this patent
Estimating the term…
Abstract
A film advance and rewind mechanism is disclosed in which a thumbwheel is rotatable in only one direction and is drivingly coupled to a take-up spool only when rotated, the take-up spool being free to rotate in a rewind direction when a supply spool is rotated in a rewind direction.
Claims7
In a camera including means for journalling supply and take-up spool means, film advance means for driving said take-up spool means to move film in an advancing direction from said supply spool means to said take-up spool means, and film rewind means for driving said supply spool means to move film back in a rewind direction from said take-up spool means to said supply spool means, said film-advance means comprising:
- engagement means for operation in response to engagement thereof by a finger of a user and movement thereof in one direction, and coupling means between said engagement means and said take-up spool means, said coupling means being normally in a first condition in which said take-up spool means is decoupled from said engagement means for allowing movement of the film in said rewind direction, and said coupling means being operable to a second condition in response to operation of said engagement means to rotate said take-up spool means and to move the film in said advancing direction, said engagement means comprising a wheel having a peripheral surface for engagement by a finger of the user, and journalling means supporting said wheel for rotation about an axis shifted transversely from a first position to a second position in response to engagement of said peripheral surface by the finger of a user.
In a camera including means for journalling supply and take-up spool means, film advance means for driving said take-up spool means to move film in an advancing direction from said supply spool means to said take-up spool means, and film rewind means for driving said supply spool means to move film back in a rewind direction from said take-up spool means to said supply spool means, said film-advance means comprising:
- engagement means comprising a wheel having a peripheral surface for engagement by a finger of a user to effect rotation thereof in one direction, and coupling means between said engagement means and said take-up spool means, said coupling means being normally in a first condition in which said take-up spool means is decoupled from said engagement means for allowing movement of the film in said rewind direction, and said coupling means being operable to a second condition in response to operation of said engagement means to rotate said take-up spool means and to move the film in said advancing direction, means for limiting rotation of said engagement wheel in a direction opposite said one direction, shutter actuating means, and one-way clutch means coupling said take-up spool means to said shutter actuating means for operation of said shutter means in response to rotation of said take-up spool means in a film-advancing direction.
Dependencies are inferred from the claim text.