Cine-projector

A drive control mechanism for selectively actuating reel spindle means of a motion picture projector, comprising:

• a reel spindle in said reel spindle means having a cylindrical portion one end of which is open and a spindle portion which extends from a closed end of the cylindrical portion along a concentric shaft of the cylindrical portion to operatively and rigidly support a reel, and a shaft extending along said concentric shaft of the reel spindle to be rigidly coupled with said reel spindle at the open end of the reel spindle;
• base plate means rotatably supporting said shaft and being provided with a hole therethrough for braking purposes;
• a rod supported by said base plate means to be shiftable along the face of the base plate, said rod having at least one U-shaped portion formed into a U-shape deviating from the axis of the rod;
• disc shaped pulley means which confronts said reel spindle disposed outside of said base plate means and which is supported by said shaft to be freely rotatable on the shaft within said base plate, said pulley means having at least one hole through its disc;
• drive means for rotating said pulley means, said drive means including a motor operatively coupled with said pulley means;
• and
• clutch means including a first connecting means operatively secured onto said shaft to confront the disc face of said pulley means on the side not confronting said base plate means, said first connecting means having at least one claw receiving part formed at a part thereof, a cylindrical second connecting means disposed on said shaft to be rotatable and slidable thereon between said base plate means and said pulley means, said second connecting means being provided with at least one claw which is capable of coming into engagement with said claw receiving part of said first connecting means through said piercing hole of said pulley means to operatively and fixedly couple said pulley means with said shaft, cam means having a first cam face and a second cam face continuously arranged thereon, the first cam face contributing to engagement between said claw of the second connecting means and said claw receiving part of the first connecting means and the second cam face preventing the claw from engaging with the claw receiving part of the first connecting means, and control means disposed in between said base plate means and said second connecting means, said control means being rotatably supported by said base plate means and operatively coupled with said second connecting means, the control means including
• cam follower means engaging with said cam means,
• first urging means constantly urging said cam follower means to be in contact with said cam means,
• control lever means operatively coupled with said rod at said U-shaped portion of the rod,
• second urging means constantly urging said control means to be in a neutral position, and
• brake means extending to the inner circumferential face of the cylindrical portion of said reel spindle through the hole extending through said base plate means for braking, said brake means being arranged to be capable of applying braking force to the free rotation of said reel spindle means by coming into pressed contact with said inner circumferential face of the reel spindle in response to the rotation of said control means;
• the claw of said second connecting means being kept in a state of engagement with the claw receiving part of said first connecting means and said brake means being kept out of pressed contact with the inner circumferential face of the cylindrical portion of said reel spindle when displacement of said rod causes said control means to shift into a state in which said cam follower means corresponds to the first cam face of said cam means;
• the claw of the second connecting means being kept out of engagement with the claw receiving part of the first connecting means and said brake means being kept in pressed contact with the inner circumferential face of the reel spindle when the control means is shifted into another state in which the cam follower means corresponds to the second cam face of the cam means.

In a motion picture projector having means for projecting a motion picture film at a projection station and means for transporting the film from a supply means through the projection station to a take-up means, the projector including control means adjustable to a plurality of positions for conditioning the operation of the projector to a plurality of operational modes, the improvement in the control means comprising:

• shiftable means manually shiftable between a plurality of positions, said shiftable means having first and second U-shaped portions;
• drive means for actuating said supply means and said take-up means;
• first pulley means rotatably supported by said supply means;
• second pulley means rotatably supported by said take-up means;
• driving power transmission means for constantly transmitting the driving power of said drive means to said first and second pulley means to cause the first and second pulley means to rotate in opposite directions;
• and
• clutch means composed of first and second clutch means;
• said first clutch means including first connecting means for selectively coupling said first pulley means with said supply means to cause said first pulley means and said supply means to rotate together, said first connecting means being rotatably and slidably supported by said supply means, and first control means for controlling said first connecting means between a first state in which said first pulley means and said supply means are coupled with each other and a second state in which they are left free from each other, said first control means having
• a first cam having a first cam face and a second cam face, and
• a first controller having in a unified manner cam follower means coupled with said first cam and control lever means operatively coupled with said shiftable means at the first U-shaped portion of the shiftable means, the first controller being arranged to rotate and move in response to shifting of said shiftable means and being arranged to operatively engage with said first connecting means to keep the first connecting means in said second state when said cam follower means corresponds to said first cam face and to keep the first connecting means in said first state when the cam follower means corresponds to said second cam face;
• said second clutch means including second connecting means capable of selectively coupling said second pulley means with said take-up means to cause them to rotate together, said second connecting means being rotatably and slidably supported by said take-up means, and second control means for controlling said second connecting means between a first state in which said second pulley means is coupled with said supply means and a second state in which they are left free from each other, said second control means having
• a second cam having first and second cam faces, and
• a second controller having in a unified manner cam follower means coupled with said second cam and control lever means operatively coupled with said shiftable means at the second U-shaped portion of the shiftable means;
• the second controller being arranged to rotate and move in response to shifting of position of said shiftable means and being operatively coupled with said second connecting means to keep the second connecting means in said second state when the cam follower of the second controller corresponds to the first cam face of said second cam and to keep the second connecting means in said first state when the cam follower corresponds to said second cam face of the second cam;
• the first and second cam faces of said first cam being formed in a position exactly opposite to the position of the first and second cam faces of said second cam;
• said second connecting means thus being in said second state when said first connecting means is in said first state and the second connecting means being in said first state when the first connecting means is in said second state.

A motion picture projector capable of selectively adopting a normal motion picture projecting mode, a still picture projecting mode, a quick film feeding mode or a quick film returning mode, comprising:

• means for projecting a motion picture film at a projection station;
• film feed means engageable with the film at said projection station for transporting the film from a supply means through the projection station to a take-up means;
• driving means for actuating said film feed means, said supply means and said take-up means, the driving means including a motor operatively coupled with said film feed means;
• first pulley means rotatably supported by said supply means;
• second pulley means rotatably supported by said take-up means;
• driving power transmission means for transmitting driving power from the motor to the first and second pulley means in such a manner that the first and second pulley means are rotated in different directions;
• first friction means disposed between said first pulley means and said supply means to cause them to rotate together;
• second friction means disposed between said second pulley means and said take-up means to cause the second pulley means to rotate together with said take-up means;
• shiftable means having first and second shiftable rods which extend approximately in parallel and arranged side by side to be respectively shiftable to first, second and third positions, the first shiftable rod having a first U-shaped portion and a second U-shaped portion, one end of said second shiftable rod being operatively coupled with said film feed means;
• clutch means composed of first and second clutch means;
• the first clutch means including first connecting means capable of selectively and firmly coupling said first pulley means with said supply means besides the operative coupling effected by said first friction means, the first connecting means being rotatably and slidably supported by said supply means, and first control means for controlling said first connecting means between a first state in which said first pulley means is coupled with said supply means and a second state in which they are released from being coupled with each other, the first control means having a first cam having first and second cam faces, and first actuating means operatively coupled with said first connecting means, the first actuating means having
• first control lever means operatively coupled with said first rod at said first U-shaped portion of said first rod,
• first brake means for applying braking force to said supply means by coming into pressed contact with the supply means to overcome the force of said first friction means which transmits the rotation of said first pulley means to said supply means, and
• first cam follower means operatively coupled with said first cam to slide over the first and second cam faces of the first cam;
• said second clutch means including second connecting means capable of selectively and firmly coupling said second pulley means with said take-up means besides the operative coupling effected by said second clutch means, the second connecting means being rotatably and slidably supported by said take-up means, and second control means for controlling said second connecting means between a first state in which said second pulley means is coupled with said take-up means and a second state in which they are released from being coupled with each other, the second control means having a second cam having first and second cam faces, and second actuating means operatively coupled with said second connecting means, the second control means having
• second control lever means operatively coupled with said first rod at said second U-shaped portion of said first rod, and
• second brake means for applying braking force to said take-up means by coming into pressed contact with the take-up means to overcome the force of said second friction means which transmits the rotation of said second pulley means to the take-up means;
• and
• manually operable mode selecting means operatively coupled with said shiftable means, the mode selecting means including still picture projecting mode cam means for bringing said first shiftable rod and said second shiftable rod into said first position, normal motion picture projecting mode cam means for bringing said first and second shiftable rods into said second position, quick film returning mode cam means for bringing said first and second shiftable rods into said third position, and quick film feeding mode cam means for bringing said first shiftable rod into said second position and said second shiftable rod into said third position respectively, (1) when said first shiftable rod is in said first position, the first cam follower means of said first clutch means coming to a position corresponding to the first cam face of said first cam and the second cam follower means of said second clutch means coming to a position corresponding to the first cam face of said second cam, (2) when the first shiftable rod is in said second position, the first cam follower means of the first clutch means coming to a position corresponding to the first cam face of the first cam and the second cam follower means of the second clutch means coming to a position corresponding to the second cam face of the second cam, (3) with the first shiftable rod in said third position, the first cam follower means of the first clutch means coming to a position corresponding to the second cam face of the first cam and the second cam follower means coming to a position corresponding to the first cam face of the second cam and, when the shiftable rod is in the first or third position, said film feed means being disengaged from said film in response to displacement of the second shiftable rod.