US3552683A - Cinematographic projectors or the like and cartridges for use therewith - Google Patents

Cinematographic projectors or the like and cartridges for use therewith Download PDF

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US3552683A
US3552683A US685616A US3552683DA US3552683A US 3552683 A US3552683 A US 3552683A US 685616 A US685616 A US 685616A US 3552683D A US3552683D A US 3552683DA US 3552683 A US3552683 A US 3552683A
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Prior art keywords
film
roll
stripper
cam
cartridge
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US685616A
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English (en)
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John J Bundschuh
Robert J Roman
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Eastman Kodak Co
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Eastman Kodak Co
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/321—Holders for films, e.g. reels, cassettes, spindles
    • G03B21/323—Cassettes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/56—Threading; Loop forming
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection

Definitions

  • a machine such as a cinematographic projector is convertible to accommodate either a film supply cartridge or an unenclosed film supply reel, such conversion being automatically accompanied by corresponding changes in the mode of operation of the machine.
  • the machine has thereon a stripping mechanism adapted to separate the leading end of the film from a supply roll.
  • the stripping mechanism includes a stripper member movable from a first location out of engagement with the roll to a second location in engagement with the outermost convolution on the roll, a drive member movable from a first position out of engagement with the roll to a second position in engagement with the roll, and means for sequentially moving the stripper member from the first location to the second location and then the drive member from the first position to the second position while the stripper member remains in the second location.
  • the present invention relates principally to equipment such as cinematographic projectors or tape transducers adapted to be loaded with supply rolls of elongate strip material, and particularly to such equipment which'is convertible to accommodate such supply rolls either in the form of unenclosed reels or in the form of cartridges.
  • a cartridge-loaded selflthreading cinematographic projector system which is generally representative of the aforementioned type of equipment, and which includes a film stripping and threading mechanism and other projector and cartridge features related to those incorporated in the illustrative preferred embodiment of the present invention, is disclosed in commonly assigned copending Pat. application Ser'. No. 643,502, entitled cinematographic Cartridge Projector Apparatus, filed in the names of John J Bundschuh, Robert J. Roman and Kenneth W. Thompson on-Jun. 5, 1967.
  • a film supply roll wound onto a hub member is housed within a cartridge provided with axial openings through which the hub member can be rotatably supported and driven by a film supply spindle member when the cartridge is operatively positioned on the projector.
  • this objective is accomplished through the cooperation of several novel innovations, including; the employment of means for supporting cartridges of different sizes in predetermined relation to the stripping mechanism and to the supply spindle drive member engaged with the supply roll hub members within the cartridges; adapting the supply spindle assembly to be movable to either a position at which that assembly supports and drives the supply roll within a supply cartridge loaded onto the machine, or to another position atwhi'ch-a' supply reel can be accommodated by the spindle assembly without interference with the stripping mechanism; and providing means whereby the leading end of the strip material on a supply reel can be threaded manually into the machine in convenient manner.
  • the subject invention therefore also includes means forautomatically adjusting various mechanisms of a projector or analogous machine to perform in accordance with the requirements imposed by the type of supply roll unit with which the machine is loaded.
  • the illustrated preferred embodiment ofthe invention also comprises numerous other refinements and improvements of previously known projector components or assemblies, .many of such improvements and refinements being equally applicable to other types of projectors or analogous machines.
  • FIG. 2 is a top plan view of the projector shown in FIG. 1;
  • FIG. 3 is a front elevational view of the projector illustrated I in FIGS. 1 and 2, showing a film supply reel supported by the raised film supply spindle arm;
  • FIG. 4 is a perspective illustration of the film cartridge shown in FIGS. 1 and 2 and of the portion of the projector which cooperates with the cartridge to locate and support the latter in loaded position;
  • FIG. 5 is an elevational view of the opposite side of the portion of the projector shown in FIG. 4, depicting the mechanism by which the cartridge is re'leasably latched in loaded position;
  • FIG. 6 is an enlarged partial cross-sectional view taken along the line 6-6 of FIG. 5, illustrating the manner in which the cartridge is releasably retained 'in loaded position by the latch members shown in FIGS. 4 and 5;
  • FIG. 7 illustrates the profile of. an alternate film cartridge, viewed from the same direction as the cartridge shown in FIG. 1 but adapted to accommodate a smaller roll of film;
  • FIG. 8 corresponds to an enlarged portion of FIG. 1, partially cross-sectioned and broken away and supplemented with phantom views to depict the positions of various elements of the film stripping and threading mechanism of the subject projector; 7
  • FIG. 9 is a cross-sectional front view of the camshaft assembly employed to operate various elements of the projector
  • FIG. 10 is an enlarged cross-sectional view of the film guide and snubber structure shown in FIG. 8, taken along the line 10-10 of that FIG.;
  • FIG. 11 is an elevational view of the portion of the projector shown in FIG. 8, taken from inside the projector to show the arrangement of internally located components of the control assembly and the film stripping and threading mechanism;
  • FIG. 12 is a partially cross-sectioned rear elevational view of the film stripping and threading mechanism and of the control assembly shown in FIGS. 8 and 'l 1';
  • FIG. 13 is a view from the same viewpoint as FIG. 11, depicting the relative positions assumed by the various illustrated elements of the film stripping and threading mechanism and of the control assembly prior to or following completion of the film stripping and threading phase of the operating cycle of the projector;
  • FIG. 14 corresponds to FIG. 13 and shows the relative positions of the illustrated elements during the film stripping and threading phase of the operating cycle with the projector adapted to accommodate a film cartridge;
  • FIG. 15 corresponds to FIGS. 13 and 14 and shows the relative positions of the illustrated elements during the film stripping and threading phase of the operating cycle with the projector adapted to accommodate a film supply reel;
  • FIG. 16 is an exploded perspective view of the principal components of the film gate and film pulldown mechanism and of the actuating device employed to open and close the film gate and to adjust the film winding and rewinding mechanism at appropriate times during the operation of the projector;
  • FIG. 17 is a somewhat schematic top plan view of a portion of the structure shown in FIG. 16;
  • FIG. 18 is a front elevational view of a portion of the structure shown in FIG. 16, showing the relative positions of the illustrated components when the film'ga'te is in a closed condition;
  • FIG. 19 corresponds to FIG. 18 and depicts the relative positions of the illustrated components when the film gate is in an open condition
  • FIG. 20 is a somewhat schematic right side elevational view of the projector, illustrating the driving'and shifting means as sociated with the film winding and rewinding mechanism;
  • FIG. 21 is a top plan view of a portion of the structure shown in FIG. 20;
  • FIG. 22 is a partially cross-sectioned rear elevational view of the film takeup spindle assembly and of the shifter bar connected thereto;
  • FIG. 23 is a partially cross-sectioned rear elevational view of the film supply spindle assembly and of portions of the adjusting members associated therewith.
  • the projector comprises a generally rectilinear casing member 11 including a housing 12 which extends laterally toward the right side of the projector and supports a forwardly facing projection lens assembly 13.
  • the side of the projector shown in FIG. 1 will be referred to throughout the following disclosure as the right side and references to right or left movement of laterally movable projector elements will be made in the same sense unless'otherwise. specified.
  • rotatable takeup reel drive member 14 extends beyond vertical wall member 15 in coaxial alignment with a corresponding pulley member, which rotates constantly in a clockwise direction during operation of the projector.
  • Drive member 14 is adapted to receive either a relatively small film takeup reel, as shown at 16 in FIGS. 1- and 2, or a larger takeup reel shown at 17 in FIG. 3 and in broken lines in FIG. 1.
  • a similar rotatable drive member 18 likewise extends beyond wall member 15 throughmechanism plate 19 in coaxial alignment with another pulley member which is constantly rotated in a counterclockwise direction.
  • This drive member is carried by support arm 21, which is movable about shaft 22 between the lower position shown in solid lines in F [G8 1 and 2 and the raised position shown in broken lines in FIG. 1 and in solid lines in FIG. 3.
  • reel drive member 18 With the arm in its lower position, reel drive member 18 is adapted to receive a film reel, housed within a cartridge loaded onto the projector as shownat 23.
  • the film takeup reel 16 can be of a size' generally equivalent .to' the size of the cartridge as shown in FIGS. 1 and 2.
  • substantially larger conventional uninclosed film supply and takeup reels can' be installed on the respective drive members 18 and '14, thereby allowing greater lengths of film to be projected without interruption.
  • the latter reels will hereinafter be referred to as spools.
  • reel mode of operation will be understood to refer to the operation of the projector with a film supply reel mounted on the raised support arm, as opposed to the term' cartridge mode of operation, which relates to theus'e of the projector employing a film supply cartridge aligned with drive member the lowered support arm.
  • the stripper belt is constantly driven in a counterclockwise direction. Therefore, its peripheral engagement with the film supply roll rotates the film roll in a clockwise direction. Accordingly, the leading end of the film is separated from the roll by thestripper finger and is delivered out of the cartridge through a narrow guide path defined between a portion of the stripper belt and'an adjacent edge of the stripper finger.
  • the leading end of the film As the leading end of the film emerges beyond the path defined between the stripper belt and the stripper finger, it enters a curved guide channel established between stationary film guide member 31 and movable snubber member 32, which is pivotable downwardly about pin 33 but biased temporarily into firm resilient engagement with the guide member during the stripping and threading operation.
  • This curved guide channel directs the leading end of the film downwardly into engagement by the film advancing mechanism of the projector, whereby it is advanced intermittently past a projection position aligned with the projectors optical system.
  • the leading end of the film proceeds into a pivotally supported channel member 34 which delivers it into contact with the hub of takeu'preel 16.
  • the hub of the takeup reel is provided with a plurality of teeth adapted to engage the edge perforations in the film, 'whereby the film is automatically attached to the hub upon being brought into contact therewith.
  • the film As the film is being projected, it can be stopped and displayed in reverse by manually moving control lever 36 from its illustrated raised (forward) position to an extreme downward (reverse) position. Additionally, the projector is provided with a review mechanism by means of which the operator can rewind and then reproject any desired portion of the film by manually moving control lever '37 to a rearward position to temporarily actuate the film rewinding mechanism.
  • the inner end of the roll of film 24 on the film supply spool within the magazine is attached to' 'the core of the spool. Therefore, when all of the available film has been unwound from the cartridge, the resulting tightening of the film between the gate and the spool causes the snubber member to pivot downwardly to a position in whichtrigger lever 38 is engaged and depressed by shoe member 39.on the snubber member.
  • Such depression of the trigger member initiates the rewind phase of the projectors operating cycle by opening the gate and withdrawing the film pulldown claw therefrom, by reestablishing positive rewindingrotation of drive member 18, and by releasing drive member 14 from the corresponding pulley member to allow the takeup reel to rotate freely as film is unwound therefrom.
  • the film is automatically rewound entirely into the cartridge through the film gate, whereupon the rewound cartridge can be removed from the projector Reel Mode of Operation
  • arm release car 41 is moved forwardly against the resistance of spring 42, thereby withdrawing latch tooth 43 from opening 44 in the curved front wall member 45 of arm 21, (FIGS. and 21).
  • the stripper belt serves to drive the film through the guide channel between guide member 31 and the temporarily immovable snubber member 32, whereby the end of the film is threaded through the gate and attached to the takeup reel as previously described.
  • guide roller'47 retracts to its' inoperative position and the snubber memberis released so that the pro.- jection phase of the operation cycle can proceed, as related above.
  • the projector can be ad-' justed manually by means of lever 37 to display the film either forwards or backwards.
  • the film review mechanism is rendered inoperative when the film supply spindle arm is in its raised position.
  • the film is not attached to the supply reel.
  • the trailing end of the filmstrip will have been separated from the film supply reel and wound onto the film takeup reel, and must be reattached manually to the supply reel in order to be rewound thereon.
  • the film supply spindle assembly is manually adjusted to establish positive driving connection between the film supply reel and the corresponding pulley member; thus causing the supply reel to rewind the film by overpowering the opposing torque frictionally applied to the takeupreel.
  • the supply spindle assembly is manually readjusted to reestablish the weight sensitive frictional engagement of the supply reel with the pulley member, whereupon the supply reel can be removed from the projector and replaced to prepare the projector for another operating cycle. If arm 21 is moved to its lower position to convert the projector to its cartridge mode of operation before the film supply spindle assembly has been thus manually readjusted, the lowering of the arm automatically accomplishes this result to insure proper subsequent functioning of the apparatus.
  • the illustrated film cartridge used with the subject projector member 49 which cooperates with a removable top cover member 50 to define an internal compartment adapted to substantially enclose a film spool 51.
  • side walls 53 and 54 extend upwardly and join semicylindrical side wall members 55 and 56, which cooperate with the similarly curved top wall member 57 of the cover member to laterally enclose the film spool.
  • a vertical slot extends upwardly through the base portion of the cartridge and into the spool compartment to allow access to the film roll by the stripper finger and the stripper belt member.
  • the trailing end of the strip of film wound onto the film spool is attached to the hub 59 thereof by means of a pin adapted to wedge the end of the film in a corresponding hole extending axially into the hub.
  • the head of the pin shown at 61, projects beyond the corresponding face of the film spool and into an enlarged opening 62 in the face of the cartridge viewed in FIG. 4.
  • the pin serves not only to attach the film to the reel hub, but also serves to insure proper orientation of the spool in the cartridge by virtue of the fact that it can be accommodated freely within opening 62, but not within the smaller opening 63 (FIG. 7) in theopposite end wall of the cartridge.
  • the face of the cartridge adapted to be positioned adjacent the mechanism plate when the cartridge-is in its loaded position is provided with a rib structure comprising a pair of parallel vertical ribs 65 and 66 extending outwardly from that face and joined by a similar transverse rib 67 partially encircling opening 62.
  • the corresponding portion of the projector mechanism plate'19 is also illustrated in FIG. 4 and includes a recess 68 adapted to mate closely with the rib, structure of the cartridge.
  • a plurality of coplanar positioning pad members 71 are adapted to engage corresponding face surfaces of the cartridge rib structure to locate the loaded cartridge in parallel relation to the mechanism plate with the film spool in alignment with the film takeup reel and with other film engaging elements of the projector.
  • latch levers 72 and 73 are pivotally attached to the interior face of the mechanism plate by studs 74 and 75, as shown in FIG. 5. At their diagonally opposed ends, the latch levers define latch ears 76 and 77 extending through corresponding openings 78 and 79 in the mechanism plate.
  • a spring 81 attached between the latch levers applies a resilient clockwise force to both levers (counterclockwise as viewed in FIG. thereby urging the latch ears into overlapping relation to the adjacent portions of recess 68.
  • FIG. 4 also depicts a rib member 88 extending forwardly from the mechanism plate and corresponding to the profile of the base portion of the cartridge.
  • Thisstructure serves to facilitate the alignment of the cartridge ribs with recess 68 during the cartridge loading operation and also provides a film guide channel 89. It should be noted, however, that the adjacent lateral surfaces of rib member 88 and the cartridge are spaced slightly apart when the'cartridge'is in loaded position to prevent interference with the accurate orientationof the cartridge by the reception of the cartridge ribs in recess 68.
  • latch release ear 90 is manually depressed to rotate latch lever 72 in a counterclockwise direction, against the influence of spring 81, whereby the opposite end 91 of lever 72 displaces lever 73 in the same rotational direction by engagement with lip 92. Accordingly, both latch ears are withdrawn from latching engagement with the cartridge ribs, as shown in broken lines in FIG. 6.
  • FIG. 7 illustrates a profile of an alternate cartridge 93 that might be substituted for the one shown in FIGS. 4, et al. such cartridge being adapted to accommodate only'a relatively small film spool.
  • the face of cartridge 93 opposite the one illustrated is of course provided with locating ribs substantially identical to those of the cartridge shown in FIG.'4.
  • the film stripping mechanism employed in the subject projector is of the same general type described in the aboveidentified pending Pat. application Ser. Nos. 470,499, 643,502 and 643,503, and embodies many of the novelfeatures covered by these disclosures in combination with further improvements hereinafter described.
  • Stripper Finger of cam plate 107 mounted on the mechanism plate by pedestals 108. This roller assists in maintaining arm 103 in parallel relation with the mechanism plate as the arm is rotated about stud 104 to move sleeve along slot 10l ..-By this arrangement, the stripper finger is also maintained in parallel relation with the mechanism-plate and in alignment with the film roll-l09 on the film spool within the loaded car tridge 23, and is movable into contact with the roll through cartridge slot 58.
  • the stripper belt member 28 in-. cludes a drive pulley 111 attached to the external end of shaft 29, which constantly rotates in a counterclockwise direction.
  • the drive pulley is straddled by elongate side plates 112iand- 113 vertically aligned with the cartridge .film roll and pivotally! supported at one end by rotating shaft 29.
  • . 102 is located as shown at l02a. Therefore,'.the engagement of tooth 117 of the stripper finger with the periphery of the film roll by means of spring 118 causes, the stripper finger 27 to assume an operative'position determined by the size of the film roll. Similarly, when the same control mechanism pivots stripper belt member 28 upwardly into resilient contact with the film roll, its operative position will also be determined by i the size of the film roll. For example, in FIG. 8,-a relatively small film roll is illustrated in solid lines at 109, with the periphery of a larger roll being represented 'by broken line 1090.
  • Cam Plate 1 to be maintained in firm resilient contact with the film roll in counterclockwise relation toystripper arm 103 about the axis of pin 102 by spring 118.
  • the tooth of the stripper finger must not initially engage the film'roll at an angle that would block movement of the finger to its operative position.
  • the path of movement of the finger must be such as to avoid interferring engagement with adjacent membersof the projector, e .g. with guide roller 47.
  • a cam follower arm 121 is attached to sleeve 100 in fixed angular relation to the stripper finger and includes a cam follower lip 122 adapted to engage curved edge surface 123 of cam plate 107 under the influence of spring 118.
  • the tooth is rotated in clockwise relation to the stripper arm against the influence of spring 118.
  • the cam follower arm is also pivoted away from cam surface 123 to'a position as illustrated at 121a or 121b, thereby allowing the tooth without interference from the cam arrangement.
  • Guide Roller Guide roller 47 is rotatably supported in alignment with stripper belt member 28 by a shaft 131 extending through an arcuate slot 132 in the mechanism plate as shown in FIG. 8..
  • Shaft 13 is attached to a roller lever 133, shown in FIGS. 11-15, which is pivotally supported by pivot stud' 134. Accordingly, the roller is movable between an inoperative and an operative position, as shownrespectively in solid and broken lines in FIG. 8, in response to corresponding movemerit of lever 133 by the hereinafter described control mechanism.
  • the cormember When the projector is loaded with a film cartridge, the cormember are disabled from moving from their respective inoperative positions and the rolleris allowed to move to its operative position in response to depression of car 26. In this position, the roller is resiliently engaged with moving stripper belt 30, so that the manual insertion :of the end of the film 48 on the supply reel into the nip of roller 47 and belt 30 causes the film to be driven into guideehannel 89 by the'belt, until the roller is subsequently returned to its inoperativeposition by the control mechanism upon upward movement of ear 26.
  • film guide member 31 is rigidly attached to the exterior surface'of I the mechanism plate by rivets 142 and pivotally supports snubber member 32, which is attached to the. guide member by pivot pin 33.
  • snubber member 32 which is attached to the. guide member by pivot pin 33.
  • the respective lower and upper surfaces of the guide member and the snubber member cooperate to define a film guide passageway 144 when the snubber is pivoted upwardly against the guide member, as illustrated.
  • the surfaces defining the film passageway diverge to form a tapered throat 145, in alignment with that channel Accordingly, as the leading end of the film emerges from the guide channel under the influence of the stripper belt, it is pushed through passageway 144, and thereby delivered downwardly into the film gate.
  • Leaf spring 35 is attached to the mechanism plate by a rivet 146 and bears upwardly against lug 147 on the snubber member to resiliently urge the snubber member into its depicted position adjacent guide member 31.
  • the snubber member serves to stabilize the tension of the portion of film between the film gate and the supply reel or spool by moving downwardly againstthe in fiuence of spring 35 in response to momentary increases in such tension; similar devices being well known in the projector art. To be effective for this purpose, however, the snubber member must be capable of beingpivoted away from the guide member quite easily.
  • lug 147 ispromovement is controlled by one or more sprocket members in which case the snubber member would not be needed as a tension regulating device and could remain in its raised position.
  • FIG. 8 also illustrates the previously mentioned shoe member 39 extending downwardly from the snubber member above trigger lever 38, which projects through slot 151 in the mechanism plate.
  • the purpose of this shoe is to depress the trigger lever to initiate the film rewinding phase of operation when the snubber member is moved to its lowermost position by the increase in film tension accompanying withdrawal of all of the available film from the film magazine loaded onto the projector.
  • the cam control mechanism of the subject projector is illustrated in detail in FIGS. 9 and 1215.
  • the central element of this mechanism is shaft 29, which extends freely through the bore of a multiple lobe cam member 156 located between the mechanism plate and support plate 157.
  • the support plate is mounted rigidly to the mechanism plate by pedestals as indicated at 158 in FIG. 12 and rotatably supports sleeve portion 159 of the cam member, which is keyed to disc member 161 beyond the support plate by a drive key shown at 162.
  • shaft 29 is rotatably supported in the mechanism plate by bushing 163 attached to elongate side plate 112 of the stripper belt member 28.
  • beltdrive pulley 111 is attached thereto between the side plates 112 and 113 of the stripper belt member, as shown in FIG/ 12.
  • shaft 29 is rotated constantly in a counterclockwise direction by spur gear 164 attached to the internal end of the shaft and meshed with a smaller spur gear 165 rotatably supported on stub shaft 166 and driven by pulley 167 through a drive belt mechanism described below with reference to FIGS. 20 and 21.
  • a dog member 168 is pivotally mounted to disc member 161 by a pin'169 and is biased by spring 171 to urge dog ear 172 toward engagement with the multiple toothed peripheral surface of hub member 173 of gear 164, as best illustrated by FIGS. 11 and 12.
  • the cam member is coupled positively to shaft 29 for rotation therewith.
  • a clutch operating lever 174 is pivoted to support plate 157 by pin 175 and is urged upwardly by spring 176 to bias lower lever ear 177 into contact with the periphery of disc member 161.
  • lever ear 177 is adapted to be engaged by lip 178, which extends beyond disc 161 from dog member 168, thereby holding dog ear 172 out of engagement with hub member 173 and allowing the cam to remain at a stationary initial position as shaft 29 rotates.
  • ear 26 is depressed manually to the bottom of mechanism plate opening 179, however, ear 177 is moved downwardly beyond lip 178 as the upper lever ear 18'0 simultaneously moves downwardly into contact with disc 161 as shown in broken lines in FIG. 11.
  • the dog member immediately pivots about pin 169 under the influence of spring 171 to engage ear 172 with hub member 173 thereby coupling the cam member to shaft 29.
  • the cam has rotated through an angle of approximately 120, however, the corresponding rotation of disc 161 brings lip 178into contact with lever car 180, whereupon the cam member is again immobilized at its intermediate position by the disengagement of the dog ear from the hub member.
  • a spring loaded pivotal latch member is adapted to retain lever 174 temporarily'in' its depressed position by engaging upper lever ear 180, thus causing the cam member to remain at its intermediate position until the latch member is released from ear 180 by solenoid 182.
  • the solenoid is connected to an appropriate power source, not shown, through a normally open switch device 183 (FIGS. 16 and 17) provided with a sensing finger 184 extending into the film gate to close the switch in response to the presence of film within the gate. Therefore, lever 174 remains in its lower position until the film has been fed into engagement with the projectors film advancing mechanism, whereupon latch member 181 is released from ear 180. When this occurs, lever 1 74 is returned to its raised position by spring 176, whereby the disengagement of earf180 from lip 178 again temporarily engagesthe cam member to shaft 29 to restore the cam and clutch members to the initial condition shown in FIG. 11 a;
  • Cam member 156 comprises a cylindrical hub 185 concentric with the bore of the cam member at one end thereof, and four differently profiled cam lobes; namely, stripper finger lobe 186, reset lobe 187, roller and snubber lobe 188, and stripper belt lobe 189.
  • the respective profiles of these lobes are shown in FIG. 13 with the cam member illustrated in its initial position, and it will be understood that the lobes remain at all times in the same angular relation to one another; reasons for the particular illustrated profiles of the diffei nt lobes will be apparent from subsequent explanations of the functions performed by the cam, member.
  • the cam member could be adapted to b rotated through each complete revolution in two successive angular movements of other'than l20 and 240, such angles having been chosen somewhat arbitrarily to reduce the maximum torque required to rotate the cam member from that which would be needed if 'the cam were rotated successively through more nearly equal angles.
  • stripper finger 27 is controlled by the cam control mechanism throughslide bar 191, which is supported at one end by legs 192 and 193 slidably straddling cam hub 185, and at its opposite end by an L-shaped ear 194 extending directions, as indicated by the arrowhead of each such symbol,-
  • a stripper belt control ever lever 199 is pivoted to the mechanism plate by pivot stud 201 and is provided with a cam follower ear 202 biased toward engagement with the stripper belt lobe 189 of the cam me'mber by a spring 203.
  • the lever is provided with a slot 204. This slot receives the end of a stud 205, which is rigidly attached to the side plate of the stripper belt member adjacent the mechanism plate and extends through the mechanism plate via an arcuateslot shown in broken lines at 206 in FIG. 8. 7
  • slide bar 191 and lever 199 are located as shown in FIG. 13 by the resilient engagement of their respective cam follower ears with the corresponding cam lobes thereby maintaining the stripper finger and the stripper belt member intheir inoperative positions as represented in solid lines in FIG. 8.
  • cam member 191 Upon manual depression of ear 26, the cam member revolves to its intermediate position. Accordingly, as shown in FIG. 14, slide bar 191 effects movement of the stripper finger to its operative position as cam follower car 197 is maintained in contact with cam lobe 186 by'spring 198. During such movement of the cam member, cam lobe 189 also presents a has brought the stripper finger to its operative position and has aligned notch 209 in the stripper arm with ear 207. Thus, since ear 207 is no longer blocked, spring 203 can now pivot the slotted end of lever 199 upwardly, to thereby rotate the stripper belt member about shaft 29 and into resilient driving engagement with the film roll on the cartridge spool. By incorporating this feature, the present'invention therefore further assured proper functioning of the film stripping mechanism by avoiding film unwinding rotation of the film roll by the stripper belt until the stripper finger is operatively positioned in engagement with the roll.
  • Selector Slide Selector slide 215 is supported for vertical sliding movement by stationary pins 216 extending through slots 217 in the slide and is biased upwardly by a relatively strong spring 218.
  • a relatively strong spring 218 As long a arm 21 is.latched in its lower position to allow the projector to accommodate film cartridges, the slide plate is also retained in its lower position, as shown in FIGS. 1114, against the influence of spring 218, by the engagement of slide lip 219 by abutment finger 221 attached to the movable arm 21.
  • spring 218 moves the selector slide upwardly to the position shown in FIG. 15, defined by the engagement of pins 216 with the lower ends of slots 217.
  • a notch 222 in the slide is adapted to receive lip 195 of slide bar 191 as that bar moves to the position shown in FIG. 14 to operate .the film stripping mechanism.
  • notch 222 is above the path of movement of lip 195. Therefore,'as the cam member rotates from its initial position to its intermediate position, lip 195 encounters edge surface 223 of the selector slide, which blocks further movement of the stripper finger from its inoperative position by preventing cam follower car 197 from being retained in contact with cam lobe 186 by spring 198.
  • lever 199 cannot rotate about pivot stud 201 to move the stripper belt member into operative position until arm 103 has pivoted sufficiently to align notch 209 with ear 207, which cannot occur as long as slide bar lip 195 is blocked by the selector slide, it is apparent that the stripper belt member also remains in its inoperative position.
  • the position of the selector slide also determines the operativenessof guide roller 47 by allowing the roller to move from its inoperative position to its operative position only when the projector is in the reel mode of operation. This is accomplished by means analogous to those just described, as will be hereinafter explained in connection with describing the roller positioning elements of the control cam mechanism.
  • the projector is adapted to rewind film through the film gate-only when loaded with a film cartridge. Therefore, still another function of the selector slide is to prevent the initiation of the cartridge rewinding phase of the projector cycle except when arm 21 is positioned to accommodate a film supply cartridge.
  • This function is per formed by providing the selector slide with a lateral ear 224 extending beneath trigger lever 38. During the cartridge mode of operation, ear 224 is below the lowermost position of the trigger lever defined by slot 151 in the mechanism plate, as shown in FIG. 13, and therefore has no effect on the operation of the trigger. In the reel mode of operation, however, the raised position of the selector slide illustrated in FIG.
  • Guide Roller Guide roller lever 133 is pivotallysupported by stud 134 attached to the mechanism plate and isprovided with a cam follower ear 227 extending upwardly from the base member 228 of the lever and urged toward engagement with cam lobe 188 by spring 229.
  • cam follower ear 227 extending upwardly from the base member 228 of the lever and urged toward engagement with cam lobe 188 by spring 229.
  • selector slide 215 is in its lower position, i.e. during the cartridge mode of operation, a blocking car 230 on the selector slide is disposed immediately above base member 228 of the lever, as illustrated in FIG. 13. Consequently, during rotation of the cam member, the roller is maintained in its inoperative position by the engagement of the lever base member with blocking ear 230, as shown in FIG. 14, while the'stripper finger and the stripper belt perform the film stripping operation. Conversely, when the projector is adjusted to the reel mode of operation, the corresponding raised position of the selector slide removes blocking ear 230 from the path of movement of base member 228, allowing cam follower car 227 to follow cam lobe 188 under the influence of spring 229. Accordingly, the roller moves into resilient contact with the stripper belt as the stripper belt member and the stripper finger are retained in their respective inoperative positions by the selector slide.
  • an interlock device is employed to prevent ear 26 from being depressed unless control lever 36 is in its raised (forwardlposition.
  • this device comprises a cam slide 231 slidably supported for vertical movement of studs 232. At its lower end, the cam slide is bifurcated as shown at 233 to straddle the adjacent end of control lever 36 so that the vertical position of the slide plate corresponds to the position of the control lever.
  • a blocking slide 234 is similarly supported for horizontal sliding movement by studs 235 and is biased rearwardly by a light spring 236 to maintain the rearward end by the blocking slide in contact with cam surface 237 along the adjacent edge of the cam slide. Accordingly, as long as control lever 36 is in its raised (forward) position, its blocking slide is located as shown in solid lines in FIGS. 11 and 20, with its upwardly extending leg 238 behind the path of movementof car 26. Upon movement of control lever 36 to its lower (reverse) position, however, the corresponding movement of the cam slide brings the sloped upper portion of cam surface 237 into engagement with the blocking slide, thereby camming the latter slide forwardly to position leg 238 directly below car 26 as shown in broken lines in FIGS. 11 and 20. Consequently, it will be apparent that leg 238 prevents downward movement of the car so long as the projector is adjusted for reverse projection, thus positively eliminating the employment of the thread ing mechanism until lever 36 is returned to its raised position.
  • snubber member 32 is pivotable i 7 which is pivotally mounted on stud 134 and provided with cam follower car 240 aligned with cam lobe 188.
  • a relatively strong spring 241 biases the rearwardly projecting arm 242 of lever 239 in an upward direction, thereby maintaining cam follower ear 240 in constant engagement with cam lobe 188.
  • reset lever 243 is centrally supported for pivotal movement by the upper selector slide support pin 216, with the forwardly extending leg 244 of the lever located directly above cam lobe 187.
  • the rearwardly extending leg 245 of the same lever projects above the adjacent end of the cocking arm 246-illustrated in detail in FIGS. 16l8 and shown in cross section in FIGS. l3-15.
  • FIGS. 16 -20 The film gate assembly of the subject projector is depicted by FIGS. 16 -20, with various elements of the assembly having been omitted in different FIGS. for purposes of clarity.
  • a movable gate member 255 includes a channel portion 256 extending downwardly from a forwardly sloped film guide lip 257 and adapted to mate loosely within channel structure 253 to define a vertical film passageway sown shown at 258 in FIG. 17. Except during the cartridge rewinding operation, the film within this passageway is resiliently sandwiched between the surfaces of the gate members adjacent t'hereto under the influence of springs 259, which bias the movable gate member in a rear ward direction. As illustrated'inFlG.
  • the film gate is positioned with diverging film guide lips 254 and 257 located directly below the lower end'of the guide channel defined between film guide member 31 and snubber member 32, so that the leading end of the film emerging from that channel during the filmthreading operation is guided into passageway 258 between the gate members.
  • the open throat portion 260 of lower film guide member 261 is located directly below film passageway 258 to receive the end of the film as it emerges from the gate, thereby causing the film to be further guided into throat 262 of channel member 34, through which it is delivered to the hub of the takeup reel.
  • a snubber shoe is adapted to resiliently engage the film along the adjacent curved portionof lower guide member 261; the principal function of this shoe-being to control the film tension between the gate and the takeup reel during reverse projection of the film.
  • a projection aperture 265 is provided in the movable gate member along the film passageway and merges into vertical claw receiving slots 266, extending above and below the aperture.
  • Corresponding aligned openings, notshown, are of course also provided in the stationary gate member,thereby defining a film projection location along the axis of the projectors optical system represent d by projection lamp 267 and lens 268.
  • the film advancing mechanism of the projector is generally similar to the one described in commonly assigned pending Pat. application Ser. No. 648,282, entitled Film Pull Down and Control Mechanism For a Motion Picture Projector, filed in the name ofThomas G. Kirr on 23 Jun. 1967, now US. Pat. No. 3,463,372.
  • a claw plate 271 is mounted to support plate 252 between ball bearings shown at 272, which provide for vertically oriented up and down movement of the claw plate while also defining a vertical pivot axis about which film claws 273 can move into or out of the claw receiving slots in the gate members.
  • Behind the claw plate, rotary shutter blade 274 and cam member 275 are attached to shaft 276 of drive motor 277, which constantly rotates in a counterclockwise direction.
  • a cam follower roller 278 projects rearwardly from the claw plate and is urged downwardly into contact with the peripheral cam surface 279 of the cam member by a spring 281, whereby that cam surface imparts predetermined vertical movement to the claw plate.
  • the face of the cam member is provided with two concentric cam surfaces 282 and 283, of different configurations.
  • a cam follower pin 284, slidably supported by bushing 285 in control lever 36 is adapted to be aligned selectively with either of the two cam surfaces by moving the externally accessible end of the control lever shown in FIGS. 1 and 3 to either its raised or its lower position, thereby pivoting the leverabout stationary pivot stud 286.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
US685616A 1967-11-24 1967-11-24 Cinematographic projectors or the like and cartridges for use therewith Expired - Lifetime US3552683A (en)

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US (1) US3552683A (fr)
JP (1) JPS4924287B1 (fr)
AT (2) AT296014B (fr)
BR (1) BR6804268D0 (fr)
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GB (2) GB1261190A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656702A (en) * 1968-10-30 1972-04-18 Vockenhuber Karl Strip-handling apparatus
US3666206A (en) * 1969-06-04 1972-05-30 Vockenhuber Karl Strip-handling arrangement
US3666205A (en) * 1970-01-26 1972-05-30 Bell & Howell Co Apparatus for stripping and feeding web material from a supply roll or cartridge
US3669383A (en) * 1969-12-19 1972-06-13 Ricoh Kk Movie projector adapted to use both a film cartridge and an open reel
US3677624A (en) * 1969-09-17 1972-07-18 Ricoh Kk Movie projector for use with a film cartridge or reel
US3712719A (en) * 1970-05-21 1973-01-23 Agfa Gevaert Ag Projector for use with magazines and reels for motion picture film
US3719335A (en) * 1970-12-01 1973-03-06 Ricoli Kk Automatic film rewinding device for small movie projectors
US3750975A (en) * 1971-04-23 1973-08-07 Eastman Kodak Co Control device for projector film stripping and threading mechanism
US3751148A (en) * 1970-10-19 1973-08-07 Balex Intern Sa Cinematographic projector
US3807844A (en) * 1970-03-13 1974-04-30 Vockenhuber Karl Film-handling apparatus
US3863864A (en) * 1973-01-15 1975-02-04 Bell & Howell Co Film treading assembly and rewind actuator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63198863A (ja) * 1987-02-13 1988-08-17 Nippon Steel Corp 渦流探傷装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965328A (en) * 1956-08-23 1960-12-20 Alvin F Groll Device for peeling strip metal from coils thereof
US3002424A (en) * 1961-10-03 Film feeding device
US3429518A (en) * 1968-02-19 1969-02-25 Eastman Kodak Co Device for stripping and feeding strip material from a roll

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002424A (en) * 1961-10-03 Film feeding device
US2965328A (en) * 1956-08-23 1960-12-20 Alvin F Groll Device for peeling strip metal from coils thereof
US3429518A (en) * 1968-02-19 1969-02-25 Eastman Kodak Co Device for stripping and feeding strip material from a roll

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656702A (en) * 1968-10-30 1972-04-18 Vockenhuber Karl Strip-handling apparatus
US3666206A (en) * 1969-06-04 1972-05-30 Vockenhuber Karl Strip-handling arrangement
US3677624A (en) * 1969-09-17 1972-07-18 Ricoh Kk Movie projector for use with a film cartridge or reel
US3669383A (en) * 1969-12-19 1972-06-13 Ricoh Kk Movie projector adapted to use both a film cartridge and an open reel
US3666205A (en) * 1970-01-26 1972-05-30 Bell & Howell Co Apparatus for stripping and feeding web material from a supply roll or cartridge
US3807844A (en) * 1970-03-13 1974-04-30 Vockenhuber Karl Film-handling apparatus
US3712719A (en) * 1970-05-21 1973-01-23 Agfa Gevaert Ag Projector for use with magazines and reels for motion picture film
US3751148A (en) * 1970-10-19 1973-08-07 Balex Intern Sa Cinematographic projector
US3719335A (en) * 1970-12-01 1973-03-06 Ricoli Kk Automatic film rewinding device for small movie projectors
US3750975A (en) * 1971-04-23 1973-08-07 Eastman Kodak Co Control device for projector film stripping and threading mechanism
US3863864A (en) * 1973-01-15 1975-02-04 Bell & Howell Co Film treading assembly and rewind actuator

Also Published As

Publication number Publication date
CH506087A (fr) 1971-04-15
AT304264B (de) 1972-12-27
AT296014B (de) 1972-01-25
JPS4924287B1 (fr) 1974-06-21
BR6804268D0 (pt) 1973-01-11
GB1254705A (en) 1971-11-24
GB1261190A (en) 1972-01-26

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