Abstract: Disclosed is a film delivery and recovery stabilization system for platter-type movie projection systems which provides a stratum material for dissipating static charge which accumulates within the film media and a plurality of retaining members selectively positioned at the periphery of a spool of film. The retaining members encasing magnetic elements that magnetically attach to a magnetic material which has been placed in a variable number of radial slots in the static dissipating stratum material.

Abstract: A housing device for coaxial reels of motion picture film, intended to be associated with an optical block of a film camera is provided, including: a stage housing the reels and defining a space for guiding rollers for guiding the film in a loop between the reels and a rear presser intended to face a filming window of the optical block, each reel including two circular flanges for axially holding the film around a core; a main axis intended to cooperate with the cores; two secondary axes each supporting a film return idler and separating disks for separating the flanges of a reel; and a control unit for defining a relative motion between the secondary axes and the reels, between an idle position where the secondary axes are radially distant from the reels and an active position where the separating disks separate the periphery of the flanges in a determined region, fixed with respect to the housing device.

Abstract: A movie film cassette comprises a light-tight casing containing an unexposed film reel and adapted to contain, after shooting, an exposed film reel. The reels and the film are positioned so that, in an operating position within a reception device associated with a movie camera, no moving element, located in the casing and contacting the film, is in contact with a fixed element of the casing.

Abstract: Film cassette with a housing in which a film supply container and a film takeup container are provided in housing halves 11, 12 arranged side by side to receive an exposed and unexposed film, a cassette window mountable on the film guide surface of a motion picture camera, and a cassette drive. Between housing halves 11, 12, a turning loop device 2 is arranged in which the film is guided from one housing half 11 to the other housing half 12.

Abstract: A film magazine having a case adapted to be mounted in fixed position adjacent a motion picture camera that is adjustably movable along a fore and aft axis. The magazine includes a film slot and a film guide assembly movable along the length of the film slot for guiding the film in light tight relation through the film slot regardless of the position of the camera. The arrangement does not require rethreading of the film following each change in camera position.

Abstract: Film boxes for attachment to and use with a camera are keyed and secured by thumb screws to a shutter housing of the camera to permit detachment and accurte reattachment. Light restrictive devices negate transmission of light into each film box upon removal of same. A longitudinally displaceable film reel drive permits rapid disengagement and reengagment of the film boxes without careful alignment and a belt drive prevents, through slippage, film tearing forces.

Abstract: A reel assembly apparatus for coaxial magnetic tape reels is provided in which both an inboard reel and an outboard reel may be reliably clamped to their respective drive spindles from the outboard side of the assembly apparatus with ease and convenience. For the purpose of clamping the inboard reel, an internal locking nut extends radially in the plane of the inboard reel from its drive spindle into threading engagement with a hub of the inboard reel. A linkage, extending axially through the outboard drive spindle, rotates in response to turning movement of a bail accessible to an operator. The locking nut, in response to the rotation of the linkage, (1) initially causes the inboard hub to rotate, relative to the inboard reel, a limited amount into a reel-clamping position, and (2) then causes an axial movement of the inboard hub. This latter movement drives the inboard reel axially, to clamp it against a radially extending member of the inboard drive spindle.

Abstract: Coaxially disposed tape reels are driven independently of each other by motors located inside coaxial hubs on which the reels are held. The mechanisms for loading and unloading the reels include arc-segment-shaped levers pivoted at one end on rings and actuated at the other end in the space between the drive motors and the hub shells to push out their mid portions to provide, in sequence, clamping of the lower reel, provision of a support for the upper reel and clamping of the upper reel, with retraction of the levers in the reverse sequence enabling removal first of the top reel and then of the bottom reel. A grip knob at the top which can be turned relative to one or both of the hubs serves to actuate this mechanism.

Abstract: A motion picture camera of the type which advances the film through a film gate in a stop-and-go motion and particularly designed for high speed operation, and comprising a film drive mechanism having a sprocket and two guide assemblies for forming and guiding a loop of film through the film gate, one of the guide assemblies being mounted on an eccentric for continuous rotation while moving the loop of film against a stationary registration pin in intermittent fashion, the registration pin being disposed for insertion through a perforation of the film when the eccentric crosses dead center, and the other guide assembly being a compact structure for cooperating with the first guide assembly to reduce any accumulation of the composite error in the perforations of the film; the camera is also constructed in two sections which are removably secured together by a release mechanism which is readily separable by one hand of the operator of the camera, one section of the camera containing a film supply reel and take-

Abstract: A motion-picture film cassette has a pay-out spool and a take-up spool mounted coaxially, but at opposite sides of a divider wall. Film travels in one direction through the wall from the pay-out spool to the take-up spool. An anti-reversing device is provided to prevent reverse movement of the film and/or spools; it includes an annulus of holes in the wall, surrounding the axis of the spools, and a resiliently yieldable finger projecting from that surface of the take-up spool which faces the wall. The finger ratchets over the holes when the take-up spool turns in take-up direction but engages in a respective one of the holes to block reverse movement when the take-up spool attempts to turn in the opposite direction.

Abstract: The external cassette casing of a narrow-gauge film cassette with film spools arranged coaxially to each other is closed on five sides and only open on the side opposite the film window. The base of the cassette casing is provided with a hole opposite the dog-cassette opening. A screw plug is placed through this hole, this plug engaging in a corresponding thread in the hollow bearing pin of the film take-up core with its thread shank and projecting slightly beyond the open worked end of the bearing journal with the lengthened part of the shank.

Abstract: A mechanism by which more than one torsion spring can be serially coupled to a member to impart a torque thereto equivalent to that from a single spring having the same number of turns as the total turns of the coupled springs. The springs to be coupled are connected at one end to respective storage shafts which are mounted to a free floating coupling arm. The coupling arm rotates about a shaft coaxial with the member to which the other ends of the springs are attached. In a capstan driven web system having a take-up reel and a supply reel, two sets of serially coupled negator springs are utilized to maintain proper web tension during driving of the web system.

Abstract: A pair of reel spindles are mounted on the same axis normal to a tape deck, the inboard spindle adjacent the tape deck being journalled for independent rotation upon the exterior of a bearing means extending from the deck, and the outboard spindle remote from the deck being mounted on a shaft extending interiorally of the bearing means for independent rotation with respect to the outboard spindle. The inboard spindle includes a turntable flange and key portions extending into keyways in the inboard reel. The outboard spindle has radially extending key portions mating with the keyways of the inboard reel, to permit passage of the inboard reel freely to and from the inboard spindle. The outboard reel is provided with truncated keyways that mate with the outboard spindle keys but prevent passage of the outboard reel inboardly to the region of the inboard spindle.

Abstract: A cartridge for an information carrier (4) comprises a housing (1), openings in the housing for access to the information carrier, flaps (6,6a) covering the opening, a shaft (2) fastened to the housing, and two reels (3,3a) rotating around the shaft, with the information carrier being guided between the two reels. The cartridge comprises at least a spring differential compensating drive with two spring mechanisms of constant torque (10,10a) which continuously create oppositely directed torques to hold the information carrier in continuous tension. Each spring mechanism comprises a supply roll (9,9a), a working roll (8,8a) and a pre-bent spring tape (10,10a). The working rolls rotate around shaft (2) and are connected to the reels. The rolls of the spring mechanisms are mounted onto the reels and the supply rolls of the springs are arranged on a common support (7) which is loosely rotatable with the working rolls and the reels about the shaft.

Abstract: A cycloramic image projection system in which an image as viewed from a central point, is projected in a complete circle about the viewer's position onto a drum-type screen. Included is a conical reflector arranged concentrically with the optical axis of a circular beam of light projected onto the reflector and which is turned in a radially outward direction and condensed through the picture area of a circular loop of film on a sprocket also concentric with the optical axis and which surrounds the reflector. A toroidal convex lens surrounds the film loop concentrically and serves to focus and project a 360.degree. image of the picture onto the screen, and the film loop is continuously wrapped on and off around the reflector whereby a continuously changing but temporarily stationary 360.degree. image is swept onto and off the screen.

Abstract: A wound roll of filmstrip of the type having a photographic emulsion layer on one strip face and a raised stripe disposed along one edge of the opposite strip face is so formed as to produce temporary adhesion between the stripe of one convolution and the emulsion layer of an adjacent convolution. Such adhesion or tacking, restricts relative movement of the convolutions, thereby avoiding effective axial expansion of the roll and the resultant generation of undue frictional forces during advancement of the strip through a cartridge in which it is housed.Such tacking may be achieved by forming the strip into a roll and by so applying energy to a flat end face of the roll as to cause localized melting of the emulsion layer of one convolution at its interface with the raised stripe of an adjacent convolution, whereupon subsequent cooling and rehardening of the emulsion produces adhesion of the convolutions at such interface.

Abstract: A tape spool assembly for handling magnetic recording tape, or the like, including a pair of coaxial spools interbiased for counterrotation. The biasing means used for the spools features a pair of spirally wound springs, and a floating rotatable plate disposed between the spools and connected thereto by the springs--this plate being rotatable relative to both spools on the same common axis.

Abstract: A cassette tape comprising a case body having an upper cassette half and a lower cassette half with a partition member in-between; a flange ring projecting upward and downward being provided in the center of said partition member to constitute a hub tube for supporting the upper-layer and lower-layer tape hubs in conjunction with corresponding flange rings formed on the upper and lower cassette halves respectively; a plurality of tape guide rollers being provided inside the cassette so as to position the tape separately into two overlapped upper and lower layers in a cassette with a partition member between them, making the cassette capacity to be cut down to one half, while the tape capacity of conventional cassette is still maintained.

Abstract: A cartridge for handling an extended length of strip material, such as motion picture film, includes cooperating drive means for advancing such material through apparatus such as a motion picture camera. The cartridge defines a closed web loop operable effectively to slave the operation of a strip-driving member of the cartridge to the functioning of a strip-feeding member of the apparatus, and further includes a specially-mounted integral drive motor for responsively rotating a pair of storage spools on which the strip may be wound.