Abstract: An eyeglass holder having an elongated, flexible band terminated in opposed ends each having eyeglass receiving and holding fixtures, the fixtures comprising unitary elastomeric molded parts having disc-like portions and integral tail-like projections extending therefrom, the projections being considerably thicker than the disc-like portions and having elongated, temple-receiving, closed ended slots extending along the majority of the length of the projections, the end of the slot nearest the disc-like portions being spaced therefrom.

Abstract: A rear projection viewer apparatus of the type wherein a projected image is projected towards a primary viewing screen forming the front of the viewer, the front viewing screen being removably located with respect to other portions of the viewer housing so that it may be removed from the path of the projected images. A second rear projection screen substantially smaller than the first screen is provided. The small screen and selected portions of the viewer housing are provided with complementary structure for selectively locating the second screen at an operative position substantially normal to the projection axis and at a location therealong substantially closer to the image projecting means than the first rear projection screen when it is in its operative position.

Abstract: A post production facility comprising apparatus for editing motion picture film and sound film and performing additional functions of sound mixing, displacing, etc. wherein the apparatus may perform all the functions normally associated with film editing and the physical arrangement of the film and sound tape are parallel and adjacent to each other to simplify the editing process. The apparatus comprises an upright console containing four motion picture reels, a plurality of idler pulleys, an editing module, a series of tension pulleys and a drive sprocket. The console control section is disposed at the bottom of the facility and is substantially perpendicular to the upright portion for ease of operation and contains substantially all the controls. An intermediate section is disposed at a 45.degree. angle to the upright console and houses a viewing screen and splicer mount.

Abstract: A microfiche reader with a compact housing having an upper housing portion or hood and a lower housing portion or base, has an upper surface which supports a fiche carrier in a projection plane. The hood has a lower surface spaced above the base to provide a work area for manipulation of the microfiche carrier. To further minimize size and overheating of the microfiche, a light source, condensing lens and mirror form a preassembled module which is located in the hood beneath and behind the projection screen and above the film plane. The projection lens and focus adjustment are carried by a slide or drawer which is movable between a position in registry with the light beam during use to a withdrawn position for easy access for changing lenses. The use of the light source module in the hood and the projection lens in the base enables the use of various size screen hoods on the same base without changing mirror angles in the base.

Abstract: An optical projection apparatus having foldable mirror members which permit the apparatus to be folded into a rigid, compact assembly for ease of installation and transportation. The apparatus comprises a double triangulated optical mirror structure which is interdependently mounted with the projector and screen without reference to the base section. The double triangulated structure provides the required optical rigidity while also folding or collapsing of the apparatus to reduce critical outer dimensions.

Abstract: An automatic rangefinding optical system for a camera includes optics conted for movement subject to the operative zooming main lens. The rangefinding system has an automatic focusing device which generates a pulse when separate objective images from two optical system paths coincide. Zooming the rangefinder along the two optical system paths gives more precise automatic focusing of the subject by optically modifying the objective images according to the zoom position of the main lens.

Abstract: Apparatus provides an incident light beam which illuminates the surface of a resist coated grooved disc, having an exposure pattern of signal elements formed within the groove, with a light spot that spans a plurality of convolutions of the groove. As the resist coating is developed, portions of the resist coating corresponding to the exposure pattern are removed and the emerging structure of the signal elements serves as a diffraction grating which diffracts the incident light beam. Photodetector apparatus positioned to intercept a selected portion of the diffracted beam provides an output corresponding to the light power in the selected portion. Means responsive to the output of the photodetector are provided for directly indicating the achievement of a desired emerging signal element geometry in the region illuminated by the light spot to thereby control the resist development process.

Abstract: An electrophotographic copying machine comprises a photoconductive drum rotatably disposed in the electrophotographic copying machine body, an original holder movable beyond one of the sides of the electrophotographic copying machine, a receptacle for receiving the copied paper and provided at the same side beyond which the original holder moves, a copy paper cassette provided at the same side as that at which the receptacle is provided, and a mechanism for transporting the copy paper from the copy paper cassette to the receptacle.

Abstract: An electrophotographic apparatus constructed with a photosensitive body, a primary charger to apply a substantially uniform primary charge to the photosensitive body, a secondary corona discharger to apply to the photoconductive body either an AC corona discharge or a corona discharge of an opposite polarity to that of the primary charge so as to form an electrostatic latent image on the photosensitive body, the secondary corona discharge application being effected substantially simultaneously with irradiation of an image to be reproduced, wherein the secondary corona discharger is provided with a device to control discharge conditions.

Abstract: An enlarged electrostatic image of an original document such as a microfilm frame is formed on a photoconductive belt and is developed by means of a toner substance to produce a visible image. The belt is then moved to a viewing position where it serves as a screen for displaying the visible image. The belt is discharged and the toner substance removed therefrom after the display in preparation for displaying the image of another microfilm frame on the belt.

Abstract: A liquid type developing apparatus includes a developing liquid chamber containing a developing liquid comprised of toner and an organic solution. A recording sheet having an electrostatic latent image on its surface passes between a pair of upper and lower electrically conductive electrode members arranged so that at least one of such members contacts the developing liquid. An electric power source is connected to one of the electrode members for impressing a bias voltage thereto, such one member being arranged in non-contacting relationship with the chamber, and the other of such members being arranged in electrically conductive relationship with the tank, whereby any leakage of the impressed voltage due to attraction of the toner to the members, the tank or to bearings provided for the members, is substantially avoided.

Abstract: An illumination control system for electrographic apparatus of the type utilizing a reusable photoconductive insulator member that changes in electro-photosensitive properties during the period of its useful life. The system includes a device for sensing and storing usage information about such member, for providing signals representative of cumulative usage of the member and for increasing the exposure of the member in accordance with a non-linear schedule which corresponds to photochemical, sensitometric changes that occur in the member with increasing cumulative usage.

Abstract: A photographic printer associated with a photographic processing apparatus is provided with an accumulator which receives from the printer element a roll of exposed photographic paper in naturally-formed random loops. A movable, biased plate supports the loops of paper, and position switches respond to the movement of the plate, which is a function of the length of the paper loops within the accumulator, to selectively control different operations performed within the printer to control and regulate the speed of the printer in accordance with the operational speed of other units of the processing apparatus, such as a photographic print developing unit.

Abstract: A continuous printer for microfilm especially adapted to receive unperforated 35mm film carrying microfilm images and project such images onto other film such as 16mm or 8mm film, the printing being done continuously as opposed to a step-by-step process.

Abstract: The invention relates to a photographic enlarger having an exchangeable film trap disposed in a projection head for receiving film, a magnifying lens disposed on one side of the film trap, and an insert member including a light deflection mirror and a condenser abutting the film trap; the insert member is disposed on the other side of the film trap.

Abstract: A beam of light from a light source is reflected by a polyhedral mirror which is continuously rotating in a constant speed around its axis. The reflected beam sweeps on an object and passes a predetermined point of the object surface. A dispersed light from the point is formed into a beam through a set of slits and reaches a light detector.The polyhedral mirror has a plurality of mirror surfaces each of which is spaced at a distance from the rotary axis thereof, different from the adjacent mirrors.A pair of targets are arranged in the beam axis to the light detector. Dispersed light beams from both upper and lower targets also reach into the light detector.

Abstract: A microscope system for observing moving particles makes use of a television camera for producing a continuing series of images of such particles. A source of light pulses illuminate the particles with each pulse for a period short enough to stop their movement for the camera. The light source and camera are synchronized so that the light pulses occur only between times that the camera produces image-information signals. For obtaining particle size measurements, a single light pulse during a time that the camera is not producing image-information signals is sufficient. For obtaining paticle velocity measurements, two light pulses are required so that a "double exposure" occurs at the camera during a time that the camera is not producing image-information signals.

Abstract: A method of separating chemical coatings from particles is disclosed which may be used in the aerial prospecting for minerals or the determination of the chemical constituents of a dried liquid coating.The coating is volatized and ionized by passing the particle and its coating into a plasma. Separation is achieved by passing the particle through and beyond the plasma. The coating constituents may be spectroscopically analyzed by passing the coating constituents directly into a second plasma and viewing the light emitted therefrom.

Abstract: The surface temperature of a body is measured by receiving thermal radiation from a given zone of the surface of the body along a given optical path by means of a sighting instrument. At least that part of the optical path which is adjacent the instrument is protected by means of a shield. The given zone is subjected to a scraping operation.

Abstract: A nephelometer including an optical excitation system for directing light through a first window area into a cylindrical glass container and an optical detection system for quantitatively monitoring light scattered by a substance within the container and passing therefrom through a second window area. The optical detection system includes a lens system in optical alignment with the second window area and focused on an optical dark region on an inner wall of the container opposite the second window area. The optical dark region is free of internal light reflections. Therefore, the light monitored by the detection system is scattered light from the substance substantially free of internal light reflections representing background error.

Abstract: Imaging apparatus for producing the image of a radiating object which exists in a noise-producing background, includes an optical transducer including a focal plane array or radiation detectors. Light collected by a partially filled entrance aperture is relayed to a partially filled focal plane array by relay optics which include one or more variable phase retardation devices. For example, two movable mirrors per dimension driven in push-pull by piezoelectric drives operate as phase shifters. Interference of incident light from separated parts of the entrance pupil at a series of path differences allows the initially distorted image to be dissected into a series of constituent images at several narrow wavelength intervals. The arrangement of the instrument is so chosen that each constituent image carries information about a different region of spatial frequencies.

Abstract: The corrected values to compensate for errors in instrumental levelling of a theodolite and similar instruments are found by determining angles of elevation and/or horizontal directions, measuring the instrumental levelling errors, and calculating the error free values of the instrument.

Abstract: An integrated attaching and aligning apparatus for mounting a laser shot simulator or the like in gun barrels of different calibers with a barrel member of two coaxial sections which slides into the gun barrel. A first resilient ring is removably mounted about the first section at one end for engaging and centering the barrel member in the gun barrel. A second resilient ring is removably mounted on an inside barrel between the two sections at the other end of the barrel member so that axial force applied to the second ring by the second section deforms the second ring against the gun barrel to center the barrel member in the other end. A laser source receiver and lens are adjustably mounted within the barrel member.

Abstract: A recognition device for recognizing the shape and the position of an object includes means for applying a bundle of parallel light beams having a specific cross-section to a space containing the object, means for transducing the light informations from the space into image signals, means for extracting from said image signals a specific pattern corresponding to the portion to which the bundle of light beams is applied and means for determining the position of the pattern on the image surface, whereby the existence, shape and the position of the object are recognized from the information on the image surface.

Abstract: An encapsulated measuring apparatus including a hollow body provided with a longitudinal aperture, a measuring scale and a scanning assembly positioned within the hollow body, connecting means for attaching the scanning assembly to a mounting, and sealing means for the aperture extending from walls of the hollow body and positioned so that the surfaces of the sealing means which contact the connecting means are lower than inner surfaces of the hollow body whereby penetrating liquids flow freely from the hollow body.

Abstract: A three ingredient mixture is eradiated with light rays of two separate wave lengths selected at which the absorption spectra of at least two of the materials of the mixture intersect. The light rays passing through the materials are detected and separated electrically so that they are processed with coefficients determined from ratios involving the absorption of at least two of the materials, so that the difference in the signals so obtained is quantitatively correlated to only one of the materials in the mixture.

Abstract: This specification describes a novel apparatus and method for testing optical wave guides to determine the optical attenuation and to locate faults in the optical fiber. The light for test purposes is launched into the fiber by one or more light beams that surround the wave guides and that are focussed to converge from around the circumference and at the axis of the wave guide; the convergence being at low angles of incidence, so that some of the light enters the wave guide. The remaining light launched into the wave guide in opposite directions at a location, nearer to one end than to the other, is measured at opposite ends of the wave guide. The ratio of the light at the opposite ends of the wave guide and the difference in the length of travel of the light from the region of entry to each end is used to compute attenuation. Faults are found by internal reflections of the light beam in the wave guide.

Abstract: An automatic system for scanning a generally cylindrical member with a thin beam of light. Detectors are provided for sensing interruption or scattering of the light beam by inclusions within the member. When an inclusion is detected transverse scanning stops and the beam is fixed along a chord of the cylinder. The cylinder is then rotated to cause the inclusion to intercept the chordal beam, and the information thus generated is used to identify the type and position of inclusions within the blank.

Abstract: An apparatus for orienting and maintaining the orientation of laser and similar construction equipment in a predetermined orientation with respect to a horizontal plane comprises superimposed first, second and third support plates, each of which is preferably annularly shaped for positioning a laser beam generator therethrough. The third support plate is mounted to and between the first and second support plates for pivotable movement about mutually perpendicular first and second axes, respectively. The first or top plate has level vials mounted perpendicular to the first and second axes for detecting the position of the first plate with respect to a horizontal plane. A pair of threaded screws are threaded into the central third plate to adjust the position of the first plate with respect to the bottom or second plate about the two mutually perpendicular axes.

Abstract: A collimator gunsight has a collimator lens, a transparent graticule in the focal plane of the lens, and a window behind the graticule. A small artificial light source is positioned between the graticule and the window but does not obscure the ambient light entering the window from illuminating the graticule. The graticule pattern has a first portion through which light from the artificial source can pass into the aperture of the collimator lens, and a second portion which diverts, e.g. by refraction, ambient light entering the window and by-passing the artificial source so as to fill the aperture of the lens.

Abstract: Apparatus for simultaneously mixing and conveying particulate material, the apparatus comprising a housing having an input end and an output end disposed vertically higher than the input end, means for feeding the particulate material into the input end of the housing, a conveyor disposed within the housing and having a plurality of lifting surfaces provided with perforations therethrough so that a portion of the particulate material being lifted by each lifting surface descends through the perforations and is mixed with particulate material being lifted by lifting surfaces disposed therebelow, and means for discharging the mixed particulate material from the output end of the housing.

Abstract: A mixer block used in rotary drums to improve the efficiency of mixing, drying, cooling, heating, or calcining of solid materials such as gravel, stone, fluxes and the like to produce a more uniform product with minimal production of fines and dust is described. The mixer block is especially useful when used as part of the refractory lining in a rotary kiln to calcine fluxstone such as limestone, dolomite, dolomitic limestone, magnesite and the like.

Abstract: In a mixing apparatus for asphalt-aggregate compositions including a rotatable cylindrical drum and utilizing an input end for introducing composition and an opposite output end for recovering or removing composition from the drum interior, the improvement comprises a final mixing chamber comprising a sleeve extending around the drum exterior adjacent the output end and rearwardly along a portion of the drum length with the drum exterior and sleeve defining the final mixing chamber, a plurality of fins or paddles secured to the rotatable drum exterior for mixing composition in the final mixing chamber and which fins assist in directing and removing composition along and from the mixing chamber.

Abstract: An apparatus for hydrolytic degradation of plastics in which plastic material is deposited into a tubular housing via a feed hopper. An elongated screw shaft has a first section in the form of a high pitch screw thread disposed below the feed hopper to receive and advance the material to a second section. The second section of the screw shaft is in the form of a lower pitch thread for compressing the plastic material and transferring it to a longer, third section in the form of kneading discs, from which material passes through an outlet nozzle section to a cyclone separator where trapped gases and liquid may be withdrawn. The tubular housing is vented upstream of the feed hopper and a water inlet pipe is disposed adjacent to the second section of the screw shaft, downstream of the feed hopper. The outlet nozzle section is provided with pressure measuring and regulating means and a liquid level measuring and regulating device.

Abstract: An improved system for treating material proceeding continuously through a processing barrel having at least twin interconnected cylinders with saddle portions of generally V cross section at the points of interconnection of the cylinders. Twin rotating parallel mixer shafts, co-axially mounted in the cylinders, have radially interwiping screw or paddle elements between a material charging inlet and a material discharging outlet which are configured to wipe the cylinders including the saddle portions. Sets of paddle elements, each of which includes a cylinder closing paddle, are provided on the shafts at a flow control station between the inlet and outlet, and a movable flow-controlling saddle or valve element is mounted with relation to the cylinder closing paddle sets in a position such that it can be moved from an opened position to a position to restrict or block flow past the sets of paddle elements.

Abstract: A continuous mixer comprising at least one mixing zone formed by a Transfermix geometry in which the number of starts of the helical thread changes for each of the components along the length of said Transfermix zone in the opposite sense to the change of the cross-sectional area of helical grooves on said component, whereby when in operation a medium moves along said Transfermix zone, portions thereof are successively transferred between the grooves of facing helical threads as giver and taker and whereby grooves of larger cross-sectional area are of greater widths than grooves of small cross-sectional area; in a preferred embodiment the mixer has a driven rotor and stationary barrel, the helical threads thereon being of opposite hand and the number of starts facing one another at any cross-section of the Transfermix zone is such as to make a substantially constant product.

Abstract: A few large, fast rising gas bubbles are generated near the bottom of a sample container and the upward movement of the bubbles causes a mixing action of the sample. The bubbles result from the periodic injection of discrete quantums of gas into the bottom of the container. The volume of a discrete gas quantum determines the size of a resulting bubble. Both the volume and frequency of generation of the quantums of gas are controlled by a timing circuit which operates a solenoid valve that permits each discrete quantum of gas to pass into the sample container.

Abstract: An apparatus for creating acoustic oscillations in a running liquid medium comprising a stator in the form of a hollow cylinder and a rotor mounted coaxially therewith and comprising a cylinder with closed ends. One of the ends of the rotor has an opening for admitting the liquid medium into the internal space of the rotor which is closed. Rows of apertures are made in the peripheral surface of the rotor and stator, the width of the apertures in the cross-section being selected on the basis of the relationship ##EQU1## wherein .omega. IS THE ANGULAR SPEED OF THE ROTOR,R is the external radius of the rotor,C is the speed of propagation of sound in the liquid medium.

Abstract: Premixing apparatus includes a number of elongated interdigitated rotors and stators. At least some of the rotors and/or stators include a first longitudinal portion with a transverse axis oriented at a first angle with respect to the horizontal axis and a second longitudinal portion with a transverse axis which forms an acute angle with the transverse axis of the first portion.

Abstract: A cylindrical tank supported on the frame of a vehicle for transporting a mixture of manure and a further liquid, usually water. To prevent the agglomeration of solid and semi-solid materials within the tank, guide members are provided to produce recirculating and swirling motions of the mixture within the tank as the result of normal movements of the vehicle while carrying the tank during travel, such motions being produced primarily by deceleration of the vehicle. The main guide member is supported in the tank so as to be inclined downwardly to the rear whereby when the vehicle stops, the liquid mixture tends to surge forward up the inclined guide member. A second guide member extending from the top of the tank downwardly at an inclination opposite to that of the first guide member and above same tends to prevent liquid mixture which has surged into the forward portion of the tank from sloshing to the rear in the upper part of the tank.

Abstract: An industrial cleaning machine that has a driven propeller means extending from a housing assembly for stirring liquid in the tank and an output shaft connected to the propeller means and carried by the housing assembly, the tank having an ear portion on a side thereof for receiving the propeller means. An apertured top plate extends over and forms a cover enclosure for this ear portion and the propeller means and housing assembly, which is of substantially L-shape, are supported on such cover enclosure. The apparatus has a seal assembly including a first seal ring having a flat side edge face thereon extending normal to the axis of the output shaft operatively positioned on the output shaft and a second seal ring having a flat side edge face thereon positioned adjacent to and engaging the first ring side edge face, tubular cover and compression means operatively engage the output shaft and seal rings to force the adjacent seal faces together to form a liquid and lubricant seal for the housing.

Abstract: A carbon black pelleter is dislosed in which pins are affixed to a rotatable shaft and extend radially outwardly from the shaft in a plurality of helical flights. The pins are arranged such that upon rotation of the shaft the trace of a pin of a first helical flight overlaps the trace of a pin of a second azimuthally adjacent helical flight to produce narrow pellet size range.

Abstract: An improved mixing device which comprises a cylinder having an inlet and an outlet and contained within the cylinder a plurality of hollow spheres having openings all about their surfaces.

Abstract: A mount for a consumable electrode printer comprises a member which slidably receives an array of consumable electrodes which are biased to a printing position, a clamp for gripping the electrodes to prevent the sliding thereof, and a release for the clamp to allow the biased electrodes to advance to a printing position.

Abstract: A high speed printing head comprises a circular array of stylii drivers for printing characters in a dot matrix format. Each driver includes a permanent magnet and bucking coil electromagnet which when energized causes a stylus to impact a printing surface. The stylus is carried on the end of an arm supported by crossed horizontal and vertical supporting flexures at its other end whereby the arm pivots about a virtual axis lying near the plane of the working air gap of the electromagnet to reduce wear of the pole piece and armature and increase impact rebound of the arm. The magnetic structure and arm structure intersect only above the pole piece reducing flux leakage and size and weight of the structure. The arm and flexure structures are non-magnetic except at said region of intersection to reduce, in conjunction with the single region of intersection of said structures, cross-talk between adjacent drivers.

Abstract: Apparatus for reducing the possibility of wrinkling arising during the feed of multi-layer strip material along a feed path including a change of direction, the apparatus including a rotatable paddle-like paper guide having blades which successively engage the inner layer of the strip material in such manner that any excess material which would contribute to the formation of the wrinkles is accommodated in the space defined between adjacent blades.

Abstract: This invention relates to an improved mechanical pencil. More particularly, the invention concerns a mechanical pencil in which the back and forth movements of a writing implement are controlled by a carrier having a spiral guide travelling along the spiral grooves formed on the inside of the pencil barrel, the carrier being adapted to travel along the spiral grooves formed on the inside of the pencil barrel in response to the manual rotations of the cap holding one end of the supporting member.

Abstract: A loose leaf binder having a supporting base or lower cover member and a top cover member interconnected by post assemblies receiving a plurality of paper sheets together with a bar mounted on the post assemblies for longitudinal movement thereon with the bar being retained in adjusted position by magnetic attraction between the bar and post assemblies. Each of the post assemblies are constructed of a rigid member and a flexible member which are telescopically arranged and constructed to enable angular orientation of the telescoping components of the post assemblies.

Abstract: Telescoping parts which are adapted to be secured together by a snap ring centered by special metallic spring construction which yieldably holds the snap ring in optimum position to facilitate the telescopic assembly of the two parts.

Abstract: A walk-behind rotary tiller includes a vertically adjustable drag stake releasably held in a selected position through means of a lock member having the form of a ring segment and mounted such that it may be pivoted upwardly and displaced forwardly to release the drag stake for vertical adjustment to another desired position and then displaced rearwardly and rotated downwardly to retain the drag stake in its new position.