US4054253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cinematic projector with integral take-up reel
Assignee: Heurtier et Cie SA
•
Filing: 1976-01-12
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Granted: 1977-10-18
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Expires: 1996-01-12
Abstract
Abstract A cinematic projector having a reversible drive motor and a drive shaft driven by the drive motor with a pivotably mounted control assembly constituted of a plurality of pinions in mesh with one another and movable between first and second positions for drivingly engaging the drive shaft. In the first position, the control assembly transmits drive from the drive shaft for forward and reverse drive of the film respectively according to the direction of drive of the drive motor while in the second position the control assembly transmits drive from the drive shaft in forward motor drive. An operating assembly is drivingly coupled to the control assembly for engaging the film on the internal reel for rewinding the film from the internal reel to the external reel only when the control means is in the second position.
Inventors
- 👤 Antoine Heurtier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:55
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
143 words
A cinematic projector comprising a reversible drive motor, a drive shaft driven by said drive motor, an internal take-up reel, support means for an external film supply reel, a pivotably mounted control means for transmitting drive from said motor for advancing film between said reels, said control means being movable between first and second positions for drivingly engaging said drive shaft and in said first position transmitting drive from said shaft for forward and reverse drive of the film respectively according to the direction of drive of the drive motor, and in said second position transmitting drive from said shaft which is driven in forward drive by said motor, and operating means drivingly coupled to said control means for engaging the film on said internal reel and rewinding the film on the external reel when the control means is in said second position.
Claim 2
Dependent Claim
143 words
A cinematic projector comprising a reversible drive motor, a drive shaft driven by said drive motor, an internal take-up reel, support means for an external film supply reel, a pivotably mounted control means for transmitting drive from said motor for advancing film between said reels, said control means being movable between first and second positions for drivingly engaging said drive shaft and in said first position transmitting drive from said shaft for forward and reverse drive of the film respectively according to the direction of drive of the drive motor, and in said second position transmitting drive from said shaft which is driven in forward drive by said motor, and operating means drivingly coupled to said control means for engaging the film on said internal reel and rewinding the film on the external reel when the control means is in said second position.
Claim 3
Dependent Claim
21 words
A projector as claimed in claim 1 wherein said control means comprises an assembly of pinions in mesh with one another.
Claim 4
Dependent Claim
37 words
A projector as claimed in claim 2 wherein said operating means comprises a feed wheel for contacting the film, a drive belt for said wheel, and a drive pulley for driving said belt from said control means.
Claim 5
Dependent Claim
91 words
A projector as claimed in claim 1 wherein said control means comprises a pivotable plate, two trains of pinions opposed with respect to the pivot axis of said plate, one pinion in each train cooperating alternatively with said shaft, threaded sleeves with reverse direction of threading on said shaft for respectively engaging said one pinion of said trains, and a central pinion mounted on the pivot axis for meshing with said one pinion and adapted according to its direction of rotation to drive either the internal reel or the external reel.
Claim 6
Dependent Claim
39 words
A projector as claimed in claim 4 comprising a pawl for effecting alternate drive of the reels from said central pinion, said pawl being freely sliding in an axial groove provided in the central pinion and having inclined extremities.
Claim 7
Dependent Claim
69 words
A projector as claimed in claim 5 wherein said control means further comprises a first pulley on said pivot axis of said plate selectively coupled by said pawl to said central pinion, a pivotal arm for rotatable support of said external reel, an axle supporting said arm, a second pulley integral with a hub mounted on said axle, and a drive belt drivingly connecting said first and second pulleys.
Claim 8
Dependent Claim
109 words
A projector as claimed in claim 6 wherein said axle includes a tapered centering portion extending from said hub, said operating means comprising a third pulley on said tapered centering portion and having teeth thereon, said control means further comprising a fourth pulley integral with said hub and spaced from the second pulley, a second drive belt engaging said fourth pulley for driving the external reel in rotation, gear teeth on said hub between said second and fourth pulleys, and a further pinion carried by said arm and engaged with the teeth on the third pulley and on the hub when said control means is in said second position.
Claim 9
Dependent Claim
46 words
A projector as claimed in claim 7 comprising pawl means between said axle and said third pulley for permitting drive from said central pinion via said first and second pulleys and said drive belt to said third pulley with said control means in said second position.
Claim 10
Dependent Claim
80 words
A projector as claimed in claim 7 wherein said operating means further comprises an assembly including a follower pulley mounted for free rotation for displacement along a circular groove having its center on the axis of articulation of the pivotal arm, and a sub-assembly comprising a fifth pulley and a friction wheel mounted for displacement relative to the internal reel and a further drive belt drivingly engaging said third pulley, said follower pulley and said fifth pulley and friction wheel.
Claim 11
Dependent Claim
41 words
A projector as claimed in claim 9 wherein said further drive belt of the operating means has a smooth face and a face with fine teeth oriented and capable of flattening upon passage on the friction wheel and reforming itself thereafter.
Claim 12
Dependent Claim
32 words
A projector as claimed in claim 9 comprising elastic means attached to said internal reel and to said follower pulley for urging the follower pulley towards the center of said internal reel.
Claim 13
Dependent Claim
54 words
A projector as claimed in claim 10 wherein said friction wheel is in contact with the film on said internal reel to drive the same when said third pulley is driven, said belt being wound on said friction wheel and said follower pulley such that the teeth on the belt engage the unwound film.
Claim 14
Dependent Claim
44 words
A projector as claimed in claim 9 wherein the sub-assembly comprises a slidable plate carrying said friction wheel and said follower pulley, and elastic means acting on said plate and said internal reel for urging the plate towards the center of the internal reel.
Claim 15
Dependent Claim
41 words
A projector as claimed in claim 13 comprising a pawl on said slidable plate cooperating with teeth formed on said internal reel and oriented to permit lowering in the direction of descent of the plate and escape in the opposite direction.
Claim 16
Dependent Claim
74 words
A projector as claimed in claim 12 comprising means for engaging the film at a location between the friction wheel and the point of contact of the film with the teeth of the belt for avoiding buckling of the film during rewinding, the latter means comprising a second drive system pivotally mounted and driven in rotation from said drive shaft via said control means an disengageable during forward and reverse drive of the film.
Claim 17
Dependent Claim
52 words
A projector as claimed in claim 4 wherein one of said train of pinions includes a further pinion coupled to said central pinion and driven by said one pinion which cooperates with said shaft, and adjustable friction means between said one pinion and said further pinion for adjusting the speed of rotation.
Claim 18
Dependent Claim
51 words
A projector as claimed in claim 4 wherein for a sound projector having a reading head, said control means further comprises two further trains of pinions engageable with said shaft for driving the film through a projection station and past the reading head with said control means in said first position.
Claim 19
Dependent Claim
57 words
A projector as claimed in claim 4 comprising upper and lower film feeders and wherein for a silent projector said control means further comprises a further train of gears driven from said shaft in said first position of the control means to drive said upper feeder, and a belt and pulley arrangement for driving said lower feeder.
Claim 20
Dependent Claim
140 words
A projector as claimed in claim 18 wherein said further train of gears comprises a drive pinion engaging said shaft with said control means in said first position, a cam secured to said drive pinion and having, on different portions of its perimeter and on at least a portion of its width, bosses adapted for cooperating with a drive dog for the film and a further pinion secured to said cam having on different portions of its width, teeth of different number in pre-determined relation with said bosses on the cam and an output pinion for driving said upper feeder, said cam and further pinion being axially displaceable, the latter engaging said further pinion in selected positions along its width, for simultaneous adjustment of the rate of drive of the dog, and the speed of drive of the upper feeder.
Claim 21
Dependent Claim
72 words
A projector as claimed in claim 4 wherein said control means further comprises an oscillatable arm, pulleys on said arm, a belt wound on said pulleys and having one face constructed to press against the extremity of film unwound from the internal reel by drive of one of said pulleys to cause the film to be pressed against another pulley and to exit from the projector for winding on the external reel.
Claim 22
Dependent Claim
41 words
A projector as claimed in claim 20 wherein said another pulley is adjustably mounted in an oblong opening provided in said arm for being urged into constant contact with the unwound film under the action of the tension of the belt.
Claim 23
Dependent Claim
41 words
A projector as claimed in claim 20 wherein said one face of said drive belt includes projecting flexible fingers capable of flattening during passage against the film being unwound and sufficiently rigid to push against the extremity of the unwound film.
Claim 24
Dependent Claim
47 words
A projector as claimed in claim 20 wherein said arm includes a lever which is engageable to pivot the arm and engage the belt with the film for rewinding, and elastic means acting on the arm to urge the same to a disengaged position for said belt.
Claim 25
Dependent Claim
48 words
A projector as claimed in claim 20 wherein the arm is rocked to rewinding position, in which said belt engages the film, by manual action, the projector further comprising an engagement means whereby the arm automatically returns to rest position after completion of the travel of the arm.
Claim 26
Dependent Claim
86 words
A projector as claimed in claim 20 comprising a further drive system for unwinding the film including a pivotal lever, a driven pulley on said lever, a second pulley on said lever at an end thereof, a belt wound under tension on said pulleys for transmitting drive to the second pulley, the latter being in contact with the film to drive the film in the direction of unwinding and a spring action on said pivotal lever to urge said second pulley into contact with the film.
Claim 27
Dependent Claim
92 words
A projector as claimed in claim 25 comprising a cable connected to said oscillatable arm and to said lever of said further drive system to oppose the action of the spring to allow passage to the exterior of the unwound film and to effect upon commencement of unwinding, a relaxation of the force on the lever, said relaxation being proportional to the diminution of the diameter of the film on the internal reel to permit progressively increased loading of the lever of the further drive system under the action of said spring.
Claim 28
Dependent Claim
28 words
A projector as claimed in claim 1 wherein said internal take-up reel is integrally incorporated in said projector, said support means detachably carrying said external film supply reel.
References Cited (Backward Citations)
US2207075A
Cited
US3016210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |