Abstract: A portable table the underside of which is formed as a light fixture which is suspended by an electrical cable, so that in a first position the device may be suspended adjacent the ceiling of a room to serve as a light fixture, and in a second position, the table may be lowered to rest on folding legs off the floor of the room. In the lowered position light may project upward through a flat translucent plate mounted in the table.

Abstract: This invention relates to photographic apparatus having means for automatically moving a lens along an axis for properly focusing on an object. The apparatus includes a light emitter for transmitting a train of light signals toward the object at a constant angle relative to the axis, and a pair of movable photoreceptors disposed in spaced relationship with the emitter in the apparatus. The photoreceptors are adapted to receive the light signals upon reflection thereof from the object, and are further adapted to produce electrical signals corresponding to the amount of light received. An operational amplifier is adapted to receive the electrical signals produced by the photoreceptors, and produce a difference signal corresponding to the difference in strength of the electrical signals.

Abstract: A flashlight in accordance with the preferred embodiment of the invention includes a housing enclosing a battery retaining member formed with spring arms for retaining a pair of batteries in spaced-apart relationship. Further included is a light bulb having a pair of leads extending therefrom and carried at one end of the housing with the leads each connected to a battery. Adjacent the opposite end of the housing a switch wire connected to one battery extends between the battery retaining member and a flexible wall of the housing. The other end of the switch wire is located adjacent a cutout portion of the battery retaining member which exposes a surface of the other of the batteries so that when the flexible wall of the housing is pressed the other end of the switch wire contacts the other of the batteries completing a circuit between the batteries and the light bulb.

Abstract: Disclosed is a movable copy board for photographic reproduction apparatus, comprising a movable document supporting frame member, a transparent plate member mounted in the frame for the accommodation of originals, an adjustable auxiliary support element being arranged for movement laterally coplanar with respect to the frame member, and means for rigidly securing the auxiliary support member in either of at least two positions to support oversize or bound materials with respect to the frame and to isolate the documents to be copied from fixed adjacent structure of the reproduction apparatus. The securing means for the auxiliary surface comprise rigid, laterally extending rod elements that move in rod guides in the frame member relative to the frame member.

Abstract: Air filter material suitable for use as a gasket in luminaires comprises a composite air-permeable felt made of a carbonized fiber material intermingled with a non-carbonized high temperature resistant fiber material.

Abstract: A modular lighting platform for photographing objects at close range comprising a mounting platform which may be slidably attached to the front of a camera bellows framework or directly attached to a camera body, tripod or the like. Attached to the platform is a plurality of extension arms which will pivot sideways about a fixed axis and can be locked in any pivotal position. Dual fastening means are contained on the extension arms for mounting auxiliary arms in a plane normal thereto and at any position along the length thereof. The length of the extension arms may vary and the auxiliary arms are slidably engaged in the dual fastening means such that the length between the extension arm and the end of the auxiliary arm may be regulated. The auxiliary arms may thereby be rotated about the extension arms and locked in any desired degree of rotation.

Abstract: Photographic apparatus, preferably a camera, having a reflex optical system for exposing film units which include a transparent outer sheet or layer through which image-bearing light is transmitted to expose photosensitive materials within the film unit. A reflex mirror, forming part of the optical system, is arranged at an optimized position with respect to the camera exposure plane to prevent light rays reflected from the transparent outer sheet from impinging the mirror at an angle of incidence which would redirect the light rays back to the film unit thereby causing a second exposure or "ghost image".

Abstract: Apparatus for simultaneous screening of sets of color-separated half-tone negatives, two or more registering images of the negatives can be projected simultaneously on photographic film by adjusting the configuration of the film support to counteract the distortion caused by the reproduction lens. For this purpose, a film support plate is devised, the surface of which can be locally deformed accordingly by adjustment of screw members.

Abstract: A camera for selectively filming at least two separate types of input images through at least one first and second object lens. Each first object lens is mounted on a part rotatable support which is in turn mounted on a rotatable lens carrier. Also mounted on the support are optical deflectors arranged to direct the image of a second object on to the film. In an alternative embodiment the second object lenses and deflectors are mounted on separate slides.

Abstract: An elongated tubular element is bent to form an upwardly extending vertical portion, a downwardly extending vertical portion and a horizontal portion joining the two vertical portions and functioning as a support element. A lamp fixture is mounted adjacent the top of the upwardly extending vertical portion and a counterweight is mounted adjacent the lower end of the downwardly extending vertical portion. The counterweight causes the center of gravity of the lamp to be below the horizontal portion of the tubular element so that when the horizontal portion is resting on a support surface, the lamp is balanced in a substantially upright position.

Abstract: A light transmitting screen capable of directing and focusing light images falling thereon, comprising a plurality of lens systems, each having a particular optical axis, making up the screen elements and each of which transmits parallel light rays incident thereon such that the light rays emerge parallel to each other. The lens systems may be of different refractive powers and have their optical axes disposed in parallel or at varying angles with each other and all are adjacently arranged in the form of a flat, curved or segmented screen with front and rear surfaces. When light is incident upon the screen from one side, the light rays pass through and are directed by the individual systems in accordance with the arrangement of their optical axes and refractive powers, so that many varying optical and lighting effects may be achieved on the other side. Each lens system may comprise a series of suitable lens surfaces arranged on a common optical axis or an optical cylinder or fiber guide.

Abstract: A photocomposing machine and font strip therefor are described which allow type designers to have the flexibility to design typographical characters which are kerned. The photocomposing machine is able to automatically kern those characters which are designed to be kerned. The automatic kerning is accomplished by intentionally offsetting each character's placement on the font strip to the left with respect to the machine's aperture, and providing an optical system in the photocomposing machine which intentionally offsets the projection of the font strip through the aperture of the machine to the right, thereby cancelling the offset of unkerned characters. Kerned characters are placed to the right on the font strip in order to allow the machine's optical system offset to overlap the image of kerned characters on the space normally reserved for the next character.

Abstract: The synchronizing switch for an electronic flash unit, which is connected to the body of a photographic camera through the medium of an adapter, is closed with a variable delay following the actuation of camera release by way of an impeller which is mounted in the camera and normally serves to initiate the firing of flash lamps in an indexible flashcube or magicube. When the impeller moves to an extended position following the actuation of camera release, it rotates a driving member which is mounted in the housing of the adapter and is connected to or made integral with one end of a leaf spring. The other end of the leaf spring carries a weight whose inertia is such that, when the driving member is rotated by the impeller, the spring undergoes at least some deformation before the weight leaves its normal position and moves toward a second position in which it closes the synchronizing switch.

Abstract: A device comprising detection means disposed in a predetermined position on the path of movement of an original scanning system in an electrophotographic copying apparatus for detecting the movement of the original scanning system and producing a signal to actuate a copy sheet feed mechanism of the copying apparatus whereby the leading end of each copy sheet can be brought into index with the leading end of an intermediate image for coordinating the printing of the original image with the scanning thereof.

Abstract: A fluorescent light fixture is disclosed which comprises an elongate base plate member adapted to be mounted on a wall or other support and having inturned side flanges forming oppositely disposed channels for frictionally retaining marginal portions of the side walls of an inverted tray member which has a truncated triangle cross section and on the open ends of which are mounted lamp receiving sockets connected by wiring to a ballast member mounted on the inside of the tray. The tray member is of resilient material permitting the side walls to be contracted along the length thereof for insertion of the marginal portions in the side channels on the base plate member. The base plate member has end walls with portions bendable to a position over the ends of the support member to lock the latter in place and a readily detachable light diffusing lens member is provided for enclosing the assembly including a lamp mounted in the lamp sockets.

Abstract: A double-exposure proof camera includes a manual film advance and a solenoid which opens and closes the shutter with energization and de-energization of the solenoid. The solenoid is connected through a thyrister and a semi-conductor switch to a battery, the semi-conductor switch being closed and opened at the initiation and termination of a time interval determined by an RC network whose resistance component is controlled by a scene exposed photosensitive element. The thyrister gate is connected through a series connected pair of switches to a capacitor, one switch being closed with the depression of a shutter release member and the other switch being closed and opened respectively with a film frame being in exposure position and the film frame being advanced to discharge. The capacitor is connected to the battery through a pair of parallel switches, one of which is manually closeable and the other is closed during the advance of the film.

Abstract: A process and device for the photographic reproduction of diapositives whereby during exposure of a film to light from an illuminated diapositive, the film is simultaneously partially fogged by diffuse light reaching the said film directly and without passing through the diapositive.

Abstract: Presented is a light weight and easily attachable light standard including a battery case for attachment to the conventional rear axle of a bicycle, and including an upwardly extending flexible standard on the top end of which is mounted a light energized by electrical energy from the battery contained in the battery case, and a pennant attached to the standard below the light. The battery case includes apertured gussets for supporting the flexible standard.

Abstract: An exposure lighthouse for use in printing screen structures for cathode-ray tubes comprising a lens assembly including a diffracting optical element, a main intensity-correction filter and a supplemental intensity-correction filter in series with the main filter. Both of the filters comprise preformed carbon particles in a light - transmitting binder.

Abstract: In response to the film drive control pulse signal generated when the shutter is closed, a switching circuit is turned ON to energize a film driving motor. When the film has been transported by a predetermined length, another control signal is generated to turn OFF the switching circuit. A control circuit is connected to a control circuit for controlling the shutter and to a circuit for controlling the motor in such a way that in response to the multi-exposure mode signal the control circuit will not energize the motor even when the pulse signal has been generated after the exposure. Thus the camera control device offers versatile multi-exposure operation.