Abstract: A fusible element having an ability to withstand a large number of on-off cycles is provided. The element comprises a ribbon of copper without any M-effect causing means. The element is bent in a zig-zag shape to establish a plurality of contiguous planar sections enclosing obtuse angles with each other and forming straight edges of the loci of intersection of the planes defined by the planar sections. The straight edges are non-perforated to maximize their flexure strength. Each of the planar sections is provided with at least one point of reduced cross-section remote from the straight edges. The ribbon of copper is electro-plated with sulfamate of nickel forming a dull, ductile layer of nickel.

Abstract: A multipurpose photographic film handling cassette is provided with a modular fluid processor assembly which is adapted to be initially supported, during cassette assembly, within the cassette housing in a preliminary assembly position wherein it is spaced from the path of the film strip and wherein it cooperates with at least one of the other cassette components to thereby permit such component to also be in a preliminary assembly position within the housing. The modular processor is displaceable from its preliminary assembly position to a final assembly position wherein the processor is supported in operable engagement with the film strip. Such movement also results in movement of one or more other cassette contained components from preliminary to final operable positions.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a two-piece "balanced force" arrangement for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. By "balanced force" it is meant that the indicating elements do not rely on any inherent deformation or internal resiliency to move the elements from an unprocessed mode to the processed mode. Further, no external force is required to act upon the terminals to hold them in a desired position.

Abstract: An applicator is provided for depositing a coating of processing fluid on a moving run of photographic film strip which includes a single fluid reservoir having an opening in an exterior surface through which processing fluid may pass. A nozzle plate is provided also having a fluid opening therein and a reservoir facing surface which is configured to be urged toward the reservoir exterior surface and to sealingly engage and to cooperate with the reservoir surface so that fluid may flow through the nozzle plate opening when the plate and reservoir are in such confronting relation. A tear tab is initially interposed between the reservoir and the nozzle plate in sealing engagement around the opening in the reservoir exterior surface so that it initially seals processing fluid in the reservoir. Removal of the tear tab from the reservoir results in release of the fluid contained therein.

Abstract: A fluid applicator is provided for depositing a coating of processing fluid on a moving run of photographic film strip which includes a single fluid reservoir which comprises an integrally formed nozzle assembly which includes an opening through which processing fluid may be released and a downwardly facing doctoring conformation for expressing the desired layer of processing fluid upon the film strip emulsion. A processing fluid sealing tear tab is positioned directly upon the downwardly facing surface of the processor and is sealingly engaged therewith by a suitable adhesive material. The tear tab is provided with means attached thereto at one end for assuring removal of substantially all of the adhesive material carried by the doctoring conformation upon removal of the tear tab to thereby assure a substantially clean adhesive free surface to be presented to the film strip during the processing fluid deposition.

Abstract: An arrangement is provided for reducing the force imparted at the junction between the pull strip and the film strip in a multipurpose film cassette wherein the pull strip is employed to remove a tear tab closure initially sealing a supply of processing fluid. The pull strip is formed with a free end portion adapted to engage a tactile discontinuity in the film strip upon winding of the film strip upon a film spool. The pull strip is provided with a strip of high friction material which, upon continued advancement of the film strip, engages the surface of the outermost convolution of film strip advancing to the reel and which, upon such engagement with the film strip, cooperates with it to resist at least a portion of the force imparted through the pull strip during removal of the tear tab closure, thereby reducing the force imparted to the junction between the pull strip and the film strip.

Abstract: A multipurpose audio-visual film handling cassette is provided wherein an audio information bearing magnetic tape is interwound with a photographic film strip upon coplanarly mounted supply and takeup spools and wherein the film strip and the audio tape are passed along different paths for photographic and audio operations to be performed thereon. The film strip and the magnetic tape are interconnected and advanced through the multipurpose cassette in a manner such that a free tape loop is formed exterior of the cassette at an audio station during the exposure/recording and project/playback modes of operation of the cassette. The manner of interconnection between, and the respective paths of the tape and film strip, result in the disappearance of the tape loop at the end of each of these operational modes and still further, no loop is formed exterior of the cassette during the processing and subsequent rewind modes of operation.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a one-piece indicating element for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. A contact element is held, prior to processing, against a spring force into a first position wherein it will be engaged by a pair of contacts in the other apparatus when inserted therein. The element is held in this unprocessed position by a slidable element, which element is displaced responsive to film advancement following processing. Such movement of the slidable element permits the biasing force to displace the contact element to a second position wherein it will not be engaged by the contact of the other apparatus, thus signaling the presence of a processed cassette.

Abstract: An audio-visual cassette system is provided employing a photographic film strip and an audio tape interwound on a common supply spool and adapted to be advanced along different paths from the supply spool to a takeup spool. The cassette is of the type in which the film strip may be exposed, processed and projected for viewing without removal from the cassette. The film strip is provided with an aperture in the supply spool leader which cooperates with a processor actuating pull strip to initiate processing of the film upon film advancement. The audio tape is coupled to the film strip at the supply spool end at a location with respect to the aperture such that the film strip pulls the tape away from the aperture region of the film during engagement of the pull strip with the aperture.

Abstract: A vibration isolating mounting arrangement for a sound accessory for a motion picture viewer is provided. The mounting arrangement includes an accessory mounting plate which precisely engages a portion of the viewer for locating the plate with respect to a film cassette receiving well in the top of the viewer. An audio component arrangement is provided which includes an audio transducer and means for advancing the audio tape past the transducer. These audio components are mounted to an audio component plate which is supported in overlying relationship with respect to the accessory mounting plate and the audio components carried thereby. The mounting between the two parallel plates is designed to effect vibration isolation between the plates, thus isolating the audio components carried by the upper plate from vibrations present in the viewer during its operational modes.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a one-piece indicating element for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. A contact element is mounted within the cassette for rotation about a fixed axis from a first position wherein it will operatively engage a signal generating terminal of the apparatus thereby indicating a given process condition of the film within the cassette, to a second position wherein it will not operatively engage the signal generating terminal of the other apparatus thereby indicating a different process condition of the film in the cassette.

Abstract: A film strip feed shuttle mechanism is provided in which a film engaging claw is supported laterally of an elongated body member adapted to be driven by camming surfaces for both longitudinal reciprocation and oscillatory rotation with respect to an axis established by means for supporting the body member. The shuttle is supported by tension springs retaining the member against the supporting means. The camming surface effecting the longitudinal reciprocation of the shuttle and its mating cam follower surface are positioned with respect to the axis and the laterally supported film engaging claw so that the frictional force developed as a result of the interaction between the cam and cam follower effect an induced torque encouraging rotation of the body member and the claw carried thereby about the axis in a direction causing the claw to move into engagement with the film strip.

Abstract: A film strip feed shuttle mechanism in which a film engaging claw is supported laterally of an elongated, transversely arcuate body member adapted to be driven by a single compound cam for both longitudinal reciprocation and oscillatory rotation on an axis established by bearing blocks in radially opposite quadrants at opposite ends of the body. The shuttle is supported by tension springs retaining the body member against the bearing blocks and compound driving cam.

Abstract: In apparatus for transfering an elongated strip of material wound upon and attached to a first spool from the first spool to a second spool to which the other end of the strip is attached in response to driving torque applied to the second spool, means are provided for terminating the driving torque upon the second spool substantially immediately following passage of all of the elongated strip of material from the first spool to the second spool. In a preferred embodiment means are provided to cooperate with and rotate with the first spool during the transfer of the elongated material to the second spool. Upon complete passage of the strip of material to the second spool, the first spool ceases to rotate and means rotating with the first spool is configured to undergo and axial outward movement at this time as a result of its rotational inertia. This axial outward movement is utilized to trigger a signal causing termination of application of driving torque to the second reel.

Abstract: A film strip carried in a multipurpose film cassette is provided with a conformation thereon which cooperates with structure carried by a processor disabling valve which may be slidably advanced, when engaged by the conformation, upon film advancement. The conformation comprises an aperture provided in the central region of the film strip which is adapted to engage a film strip engaging finger provided on the slide valve. The film strip engaging finger is disposed in a region between a pair of spaced film guiding fingers which engage only the outermost edges of the film strip. The spaced film guiding fingers and other structure in the cassette cooperate to guide the film strip in a curved S-shaped path during normal film advancement thereby. The film strip is further provided with a pair of elongated longitudinally extending slots on opposing sides of the centrally disposed slide valve engaging aperture.

Abstract: A rear projection viewer apparatus of the type wherein the projected images are initially projected downward towards a mirror mounted in the base of the viewer which redirects the projected images upwardly and forwardly to a viewing screen forming the front of the viewer. Means are provided for removing the mirror element from the downward path of the projected images and an auxiliary viewing screen smaller than the primary screen is disposed in the base of the viewer to receive the projected images thereupon thereby permitting viewing of the images on the smaller screen when the viewer is positioned with its primary viewing screen facing downward.

Abstract: Apparatus is provided for permitting viewing of images carried by a motion picture film strip contained within a film cassette, of the type having a permanent prismatic reflective element at its exposure/projection station, through the taking lens of a motion picture camera. The viewing apparatus includes means for cooperating with the movie camera and the cassette for directing light into the reflecting prism to result in projection of the image carried by the frame of the film strip at the projection station along the taking lens axis of the camera. An optical viewing attachment is provided for establishing visual access along the lens axis. The viewing attachment includes an objective lens disposed along the lens axis to receive an aerial image formed by the camera's taking lens, and a reflective element disposed along the lens axis outwardly from the objective lens to receive the image formed by the objective lens and to direct this image along a viewing axis substantially perpendicular to the lens axis.

Abstract: A compact photographic lighting apparatus for use with a motion picture camera comprising a pair of high intensity lamp-reflector assemblies mounted in side-by-side relation to opposite sides of a central main body support. The main body support is adapted to mate with complementary structure provided on the movie camera with which it is used. Each of the lamp assemblies includes a mounting cone having outwardly extending rib-like structural elements and further including outwardly extending cage-like guard assembly having a lens element at its outermost end. A thumb screw extending vertically through the main body support serves to removably attach the overall assembly to the camera. Electrical connector pins, also received in the camera extend downward rearwardly of the thumb screw and a downwardly extending positioning element, also received in the camera, is positioned forwardly of the thumb screw.