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US 4,192,600 AGranted
Film feed mechanism for a spaced apart take-up shaft and film take-up spool
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTohru Karikawa
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AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTohru Karikawa
Estimating the term…
The present invention is a film feed mechanism having a take-up shaft spaced apart from the film take-up spool. A bell crank is connected via a link to a conventional film feed control disc coupled to the take-up shaft. The reciprocal movement of the link is applied to the bell crank. The bell crank is provided with a first pawl and a second pawl. When the bell crank is moved to the right, the first pawl is in engagement with a first gear, which via second and third gears, causes the spool gear to be rotated counter-clockwise; however, the second pawl is slidingly disengaged from a rotating fourth gear. When the bell crank is moved to the left, the second pawl is in engagement with the fourth gear, which via a fifth, second and third gears cause the spool gear to be rotated counter-clockwise; however, the first pawl is slidingly disengaged from the rotating first gear. Thus, the present invention causes the spool gear to be rotated counter-clockwise in both directions of reciprocal movement of the link, and consequently, provides a widning torque of substantially constant level to the spool gear.
In a camera film feed mechanism of the type having a film take-up shaft adapted to rotate in only one direction and a link secured at a first end to a control disc coupled to a take-up shaft, said link exhibiting reciprocating movement in a first direction and a second direction opposite said first direction when said take-up shaft is rotated, the improvement comprising:
Dependencies are inferred from the claim text.