Motion picture camera

Claim 2

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first gear drivingly connected with said film collecting member; a second gear meshing with said first gear; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a pair of pawls and means for moving one of said pawls into a motion transmitting engagement with one of said gears when the other pawl is disengaged from the other gear, and vice versa, said means for moving said pawls comprising a lever which is rockable about a fixed axis and comprises an arm pivotably supporting said pawls, means for rocking said lever, and resilient means yieldably coupling said pawls to each other.

Claim 3

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member,; a first gear drivingly connected with said film collecting member; a second gear meshing with said first gear; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a pair of pawls and means for moving one of said pawls into rotary motion transmitting engagement with one of said gears when the other pawl is disengaged from the other gear, and vice versa, said means for moving said pawls comprising a lever which is rockable about a fixed axis and comprises an arm supporting said pawls, and a reciprocable claw pulldown for rocking said lever.

Claim 4

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member,; a first gear drivingly connected with said film collecting member; a second gear meshing with said first gear; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a pair of pawls and means for moving one of said pawls into rotary motion transmitting engagement with one of said gears when the other pawl is disengaged from the other gear, and vice versa, said means for moving said pawls comprising a lever which is rockable about a fixed axis and comprises an arm supporting said pawls, and a reciprocable claw pulldown for rocking said lever.

Claim 5

A combination as defined in claim 2, wherein the means for rocking said lever further comprises motion transmitting means yieldably connecting said lever to said claw pulldown.

Claim 6

A combination as defined in claim 3, wherein said motion transmitting means comprises resilient means arranged to yield in response to reciprocation of said claw pulldown when said lever encounters a predetermined resistance to rocking movement about said axis.

Claim 7

A combination as defined in claim 4, wherein said resilient means comprises a torsion spring.

Claim 8

A combination as defined in claim 5, wherein said lever comprises a second arm and wherein said torsion spring comprises a coiled portion surrounding said axis and two elongated legs, said second arm of the lever being provided with stop means for said legs and said pulldown comprising a motion transmitting projection which is flanked by said legs.

Claim 9

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first gear drivingly connected with said film collecting member; a second gear meshing with said first gear; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a pair of pawls and means for moving one of said pawls into rotary motion transmitting engagement with one of said gears when the other pawl is disengaged from the other gear, and vice versa, said means for moving said pawls comprising a lever which is rockable about a fixed axis and comprises an arm supporting said pawls, and an eccentric for rocking said lever.

Claim 10

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first gear drivingly connected with said film collecting member; a second gear meshing with said first gear; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a pair of pawls and means for moving one of said pawls into rotary motion transmitting engagement with one of said gears when the other pawl is disengaged from the other gear, and vice versa, said means for moving said pawls comprising a lever which is rockable about a fixed axis and comprises an arm supporting said pawls, and an eccentric for rocking said lever.

Claim 11

A combination as defined in claim 7, wherein the means for rocking said lever further comprises a member which is reciprocated by said eccentric and transmits rocking motion to said lever.

Claim 12

A combination as defined in claim 7, wherein said first gear comprises a shaft and wherein said film collecting member is a takeup reel which is driven by said shaft.

Claim 13

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first gear drivingly connected with said film collecting member; a second gear meShing with said first gear; a claw pulldown arranged to transport stepwise a portion of film which is remote from said collecting member; a motor having a rotary output member; a first power train connecting said pulldown with said output member and arranged to reciprocate said pulldown; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a second power train which receives motion from said output member.

Claim 14

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first gear drivingly connected with said film collecting member; a second gear meShing with said first gear; a claw pulldown arranged to transport stepwise a portion of film which is remote from said collecting member; a motor having a rotary output member; a first power train connecting said pulldown with said output member and arranged to reciprocate said pulldown; and means for alternatingly rotating said gears in opposite directions so that said film collecting member is driven in a single direction, comprising a second power train which receives motion from said output member.

Claim 15

A combination as defined in claim 10 wherein said second power train derives motion from said output member by way of said claw pulldown.

Claim 16

A combination as defined in claim 10, wherein said second power train derives motion from said output member by way of said first-mentioned power train.

Claim 17

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first rotary driven element drivingly connected with said film collecting member; a second rotary driven element cooperating with said first driven element to rotate in a second direction when said first driven element is rotated in a first direction and to drive said first element in said first direction when driven to rotate in said second direction; and means for alternatingly driving said first and second driven elements in said first and second directions, respectively, so that the film collecting member is rotated in a single direction, comprising a pair of driving elements and means for moving one of said driving elements into driving engagement with said first driven element when the other driving element is disengaged from the other driven element, and vice versa, said means for moving said driving elements comprising a carrier which is workable about a predetermined axis and supports said driving elements, and a claw pulldown for rocking said carrier.

Claim 18

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first rotary driven element drivingly connected with said film collecting member; a second rotary driven element cooperating with said first driven element to rotate in a second direction when said first driven element is rotated in a first direction and to drive said first element in said first direction when driven to rotate in said second direction; and means for alternatingly driving said first and second driven elements in said first and second directions, respectively, so that the film collecting member is rotated in a single direction, comprising a pair of driving elements and means for moving one of said driving elements into driving engagement with said first driven element when the other driving element is disengaged from the other driven element, and vice versa, said means for moving said driving elements comprising a carrier which is workable about a predetermined axis and supports said driving elements, and a claw pulldown for rocking said carrier.

Claim 19

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first rotary driven element drivingly connected with said film collecting member; a second rotary driven element cooperating with said first driven element to rotate in a second direction when said first element is driven to rotate in a first direction, and to rotate said first element in said first direction when driven to rotate in said second direction; and means for alternatingly driving said first and second driven elements in said first and second directions, respectively, so that the film collecting member is rotated in a single direction, comprising a pair of driving elements and means for moving one of said driving elements into driving engagement with one of said driven elements to rotate said one driven element in the respective direction when the other driving element is disengaged from the other driving element, and vice versa, said means for moving said driving element comprising a carrier which is rockable about a predetermined axis and supports said driving members, and eccentric means for rocking said carrier.

Claim 20

In a film transporting mechanism for motion picture cameras, a combination comprising a rotary film collecting member; a first rotary driven element drivingly connected with said film collecting member; a second rotary driven element cooperating with said first driven element to rotate in a second direction when said first element is driven to rotate in a first direction, and to rotate said first element in said first direction when driven to rotate in said second direction; and means for alternatingly driving said first and second driven elements in said first and second directions, respectively, so that the film collecting member is rotated in a single direction, comprising a pair of driving elements and means for moving one of said driving elements into driving engagement with one of said driven elements to rotate said one driven element in the respective direction when the other driving element is disengaged from the other driving element, and vice versa, said means for moving said driving element comprising a carrier which is rockable about a predetermined axis and supports said driving members, and eccentric means for rocking said carrier.