Back to results
US 4,067,647 AGranted
Dual film strip projector
AssigneeDeveloping Techniques Laboratory, Inc.
InventorHarold Gallina
Life of this patent
Estimating the term…
Abstract
A dual film strip projector projects images onto at least one screen from a pair of film strips, each of which is advanced in programmed timing independently of the other. The film strips are contained in a cartridge that is readily insertable in the projector, and the timing of the advance of the frames of each film strip is automatically controlled by control signals recorded on a magnetic tape in another cartridge insertable in the projector. The projector includes dual illumination systems, projection lenses and film strip advancing devices. Operation of the projector is entirely automatic in that the control signals on the magnetic tape operate the pair of film strip advancing devices.
Claims15
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing including a pair of lamps arranged side by side in spaced relation horizontally adjacent each other and casting parallel beams of light, each corresponding to a respective one of the pair of film strips;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing containing a pair of reels arranged upright, parallel and in spaced relation horizontally adjacent each other, (2) the pair of film strips, including frames for forming visual images therefrom, respectively arranged on the reels and operatively disposed, each in front of a corresponding one of the pair of lamps, when the first cartridge element is positioned in the housing, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen, including a pair or mirrors arranged horizontally adjacent each other and in front of the corresponding lamps, said film strips being respectively interposed between the mirrors and the lamps when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and a lever arm connected to the pivot means and extending outside the housing for operating the pivot means;
- (e) a pair of film strip advancing means in the housing each engageable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto,
- wherein each of the pair of mirrors is operatively disposed facing away from the other and at an angle of about 45.degree. to incident light from the corresponding lamp, said mirrors thereby receiving the parallel beams of incident light passing through the pair of film strips and reflecting them horizontally in opposite directions and generally normal to the direction of incident light, said light directing means further including a pair of focusing lenses each movably arranged with respect to an axis coinciding with the path of reflected light for focusing light reflected from the corresponding mirror, and
- wherein said pivot means includes a shaft connected to the lever arm for axial rotational movement upon displacement of the lever arm, a first gear connected for rotation with the shaft, a second gear in mesh with the first gear, a first flange arm connecting one of the pair of mirrors with the first gear and a second flange arm connecting the other mirror with the second gear, said first and second flange arms pivoting the mirrors through an angle of about 45.degree. toward each other to a position substantially adjacent and parallel each other when the lever arm is displaced to operate the pivot means, said pair of mirrors in the pivoted position being parallel to and accommodated in the space between the pair of reels of the first cartridge element, thereby permitting the unobstructed insertion or removal of the first cartridge element into or from the housing.
7 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing including a pair of lamps arranged side by side each corresponding to a respective one of the pair of film strips;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged side by side in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen, including a pair of mirrors each arranged in front of a corresponding one of the pair of lamps for reflecting light from the lamp in a predetermined direction, said film strips being respectively interposed between the mirrors and the lamps when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and a lever arm connected to the pivot means;
- and extending outside the housing for operating the pivot means (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto,
- wherein the lever arm includes a fail-safe member for preventing insertion or removal of the first cartridge element into or from the housing without first operating the pivot means, said fail-safe member consisting of a blocking member connected to the lever arm and positioned in a blocking position with respect to an aperture in the housing into which the first cartridge element is inserted, said blocking member being displaceable from the blocking position upon displacement of the lever arm to operate the pivot means.
6 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing including a pair of lamps arranged side by side each corresponding to a respective one of the pair of film strips;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged side by side in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen, including a pair of mirrors each arranged in front of a corresponding one of the pair of lamps for reflecting light from the lamp in a predetermined direction, said film strips being respectively interposed between the mirrors and the lamps when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and a lever arm connected to the pivot means and extending outside the housing for operating the pivot means;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto,
- wherein the pivot means includes:
- (1) a shaft connected to the lever arm for axial rotational movement upon displacement of the lever arm, and (2) a pair of flange arms each connecting a respective one of the mirrors to the shaft for pivoting the mirrors to a position permitting the unobstructed insertion or removal of the first cartridge element into or from the housing when the lever arm is displaced to operate the pivot means.
7 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged side by side in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto,
- wherein the second cartridge element has a space therein defined by a wall of the second cartridge element and by an exposed section of the magnetic tape, and wherein the magnetic tape driving means includes:
- (1) a capstan in the housing located adjacent the exposed section of the magnetic tape when the second cartridge element is positioned in the housing, (2) a pressure roller movable into the space defined in the second cartridge element for engaging in exposed section of the magnetic tape against the capstan when the second cartridge element is positioned in the housing, and displaceable to a standby position permitting the unobstructed insertion or removal of the second cartridge element into or from the housing, and (3) a linkage connected to the pressure roller and extending from the housing for displacing the pressure roller, including a fail-safe member for preventing insertion or removal of the second cartridge element into or from the housing without first displacing the pressure roller to the standby position, said fail-safe member consisting of a blocking member connected to the linkage and positioned in a blocking position with respect to an aperture in the housing into which the second cartridge element is inserted, said blocking member being displaceable from the blocking position upon operating the linkage to displace the pressure roller to the standby position.
7 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing including a pair of lamps arranged side by side each corresponding to a respective one of the pair of film strips;
- (c) a program module including:
- (1) a first cartridge element, (2) the pair of film strips, including frames for forming visual images therefrom, arranged side by side in the first cartridge element, (3) a second cartridge element joined with the first cartridge element into an integral unit insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen, including a pair of mirrors each arranged in front of a corresponding one of the pair of lamps for reflecting light from the lamp in a predetermined direction, said film strips being respectively interposed between the mirrors and the lamps when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and a lever arm connected to the pivot means and extending outside the housing for operating the pivot means;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto,
- wherein the second cartridge element has a space therein defined by a wall of the second cartridge element and by an exposed section of the magnetic tape, and wherein the magnetic tape driving means includes:
- (1) a capstan in the housing located adjacent the exposed section of the magnetic tape when the second cartridge element is positioned in the housing, (2) a pressure roller movable into the space defined in the second cartridge element for engaging the exposed section of the magnetic tape against the capstan when the second cartridge element is positioned in the housing, and displaceable to a standby position permitting the unobstructed insertion or removal of the second cartridge element into or from the housing, and (3) a linkage connecting the pressure roller to the lever arm for displacing the pressure roller simultaneously with operating the pivot means, whereby the unobstructed insertion or removal of the integral program module unit into or from the housing is permitted.
7 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged side by side in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light from the light source means through the film strips, out of the housing, and onto at least one screen;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto;
- and (h) frame adjustment means cooperating with the pair of film strip advancing means for adjusting the position of the frames of the film strips with respect to the light source means such that images projected by the projector include the visual images of entire frames,
- wherein the frame adjustment means includes a pair of elevation means each associated with a respective one of the film strip advancing means and having:
- (1) carriage means movably mounted in the housing for vertical adjustment movement and supporting the respective film strip advancing means, (2) an adjusting rod mounted for axial rotation with respect to the housing, one end of the rod extending outside of the housing and the other end being threaded and disposed in the interior of the housing, (3) driver means arranged for longitudinal movement with respect to the rod, said driver means including a thread-following shank portion in mesh with the threads of the other end of the rod, and (4) means positioned in engagement between the driver means and the carriage means for translating the longitudinal movement of the driver means into vertical adjustment movement of the carriage means.
8 more elements
A program module for a dual film strip projector of the type having:
- (a) a housing, (b) light source means, (c) means in the housing for directing light including a pair of mirrors operatively disposed with respect to the light source means for reflecting light, emanating therefrom and passing through a corresponding pair of film strips, for display on at least one screen, and pivot means for pivoting the pair of mirrors together, (d) a pair of film strip advancing means for advancing a corresponding pair of film strips independently of each other, (e) means for driving a magnetic tape, and (f) means for sensing control signals recorded on a magnetic tape and operating the pair of film strip advancing means in response thereto, the program module comprising:
- (1) a first cartridge element insertable in the housing having a pair of film strips, including frames for producing visual images therefrom, carried on a corresponding pair of upright reels arranged side by side in the first cartridge element, and (2) a second cartridge element insertable in the housing and containing a magnetic tape having at least one track for recording control signals thereon, wherein the first cartridge element includes a wall defining a first recess between the pair of reels in which the pair of mirrors is accommodated when the pivot means is operated to pivot the mirrors, so as to permit the unobstructed insertion or removal of the first cartridge element into or from the housing, and other walls defining a pair of second recesses each located relative to a respective one of the pair of reels such that the corresponding mirror, when operatively disposed relative to the reel carrying the film strip, is positioned in the second recess so as to have the film strip interposed between it and the light source means.
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light including a pair of mirrors operatively disposed with respect to the light source means for reflecting light emanating therefrom and passing through the film strips for display on the at least one screen, said film strips being respectively interposed between the mirrors and the light source means when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors together in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and control means connected to the pivot means for operating the pivot means, said control means including a fail-safe member for preventing insertion or removal of the first cartridge element into or from the housing without first operating the pivot means;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto.
5 more elements
A self-contained, automatic, dual film strip projector for projecting a plurality of images onto at least one screen, each of said images being projected from a corresponding frame of one of a pair of film strips which are operated in individually timed sequences independently of each other, comprising:
- (a) a housing;
- (b) light source means in the housing;
- (c) a program module including:
- (1) a first cartridge element insertable in the housing, (2) the pair of film strips, including frames for forming visual images therefrom, arranged in the first cartridge element, (3) a second cartridge element insertable in the housing, and (4) a magnetic tape, including at least one track for recording control signals thereon, arranged in the second cartridge element;
- (d) means for directing light including a pair of mirrors operatively disposed with respect to the light source means for reflecting light emanating therefrom and passing through the film strips for display on the at least one screen, said film strips being respectively interposed between the mirrors and the light source means when the first cartridge element is positioned in the housing, pivot means in the housing for pivoting the pair of mirrors together in a manner permitting the unobstructed insertion or removal of the first cartridge element into or from the housing, and control means connected to the pivot means for operating the pivot means;
- (e) a pair of film strip advancing means in the housing each engagable with a respective one of the film strips for advancing the film strip independently of the other;
- (f) means in the housing for driving the magnetic tape;
- and (g) means in the housing for sensing control signals recorded on the magnetic tape and operating the pair of film strip advancing means in response thereto, wherein the pair of film strips is respectively carried on a pair of upright reels arranged side by side in the first cartridge element, and wherein the first cartridge element includes a wall defining a first recess between the pair of reels in which the pair or mirrors is accommodated when the pivot means is operated to pivot the mirrors, so as to permit the unobstructed insertion or removal of the first cartridge element into or from the housing, and other walls defining a pair of second recesses each located relative to a respective one of the pair of reels such that the corresponding mirror, when operatively disposed relative to the reel carrying the film strip, is positioned in the second recess so as to have the film strip interposed between it and the light source means.
5 more elements
Dependencies are inferred from the claim text.