Abstract: Dual-circuit pressure control valves are known in which the two control pistons are acted upon by a common preloading force through the intermediary of a preload distributor. The disadvantage of the known devices is that the valve closure travel is great resulting in a large fluid volume input to the control valve. According to the present invention this disadvantage is overcome by providing adjustable stops which cooperate with corresponding extensions of the distributor as soon as an unsymmetrical mode of operation of the valves occurs.

Abstract: A relatively expensive, relatively heavy, and relatively nonflammable hydraulic fluid (chlorotrifluorethylene) is used in an aircraft ground wheel brake system between the piston (72) of a deboost device (68) and a set of wheel brakes (196). A relatively cheaper and relatively lighter, conventional hydraulic fluid (MIL-H-5606), which is also relatively flammable, is used in the remainder of the system. A replenish system for the relatively nonflammable fluid includes a reservoir divided into two chambers by a piston. One chamber contains a quantity of the relatively nonflammable fluid and the other chamber is connected to the system pressure. The deboost device includes a replenish valve which is opened in response to a position of the deboost piston. Replenishment only occurs when the brakes are applied and replenishment is necessary. At other times, all portions of the brake system are at return pressure.

Abstract: This invention relates to a brake pressure control valve and, more particularly, to a tractor-trailer control valve which includes a differential pressure surface relay piston that on one hand is acted upon by the control pressure from a control chamber and on the other hand by modulated pressure from a working chamber. The brake pressure control valve includes a first combination inlet and outlet valve which works together with the relay piston whereby the working chamber can be pressurized and vented via the first inlet and outlet valves. An auxiliary control chamber which is defined by the differential surfaces of the relay piston is connectable either to the working chamber or to the control chamber via second inlet and outlet valves. The pressure control surface of the relay piston is located opposite the working surface that is acted upon by control pressure in the control chamber. The pressure control surface can be enlarged by the pressure surface of the auxiliary control chamber.

Abstract: This invention relates to a valve assembly for a railway braking system, including a brake cylinder pressure-maintaining valve which, during brake application, takes air from the brake pipe and feeds it into the brake cylinder until it reaches minimum brake pressure. To avoid the need for an extra valve, the brake cylinder pressure-maintaining valve is used as a quick service bulb exhaust valve during brake release and member are provided to ensure that the brake cylinder pressure maintaining valve opens immediately on brake release. Once the brakes have been applied, pressure in the brake cylinder is maintained from the quick service bulb 59. Brake cylinder exhaust pressure taken from a point 124 after the brake cylinder exhaust valve 50, but before the brake cylinder exhaust choke 70, is directed to chamber G above the inshot and brake cylinder-maintaining valve diaphragm 131. Since the pressure in port 124 upstream of the brake cylinder exhaust choke 70 attains a pressure well within 10 p.s.i.

Abstract: A bearing assembly having bearing surfaces pre-loaded towards each other, the bearing surfaces being originally made in slightly non-conforming geometry and dimensions over the majority of their surface areas in sliding engagement, the areas of the bearing surfaces in engagement being thus less than the total available areas. During use, and through progressive wear-in of the bearing surfaces in engagement, the bearing surface areas in engagement are progressively enlarged with progressive conformity in geometry and dimension, the conforming surface areas being constantly kept in engagement by the elements in the assembly adapted to provide bearing pre-load.

Abstract: At least a part of the inner face 41 of each pocket of a cage 4 for retaining and guiding rolling elements is formed to have a curvature of similar configuration to that of the rolling element and the center of curvature of the face is positioned to radially deviate from the pitch circle of the rolling elements at a predetermined distance.

Abstract: A mechanism for distributing axial thrust loads acting on a rotating shaft, ncluding dual thrust bearing assemblies concentrically mounted on the rotating shaft for transmitting axial thrust loads to the thrust load distributing mechanism. The thrust load distributing mechanism includes a stationary support member having at least one fulcrum to provide a reaction force to counterbalance the axial thrust loads acting on the rotating shaft, an annular load lever cooperating with each of the at least one fulcrum, at least two thrust transfer members cooperating with first and second segments on the annular load lever and the dual thrust bearing assemblies, and a force transmitting means.

Abstract: A cased electrical component, such as a multiple electrical outlet strip, has a greatly simplified construction. A single structure provides for passage of an electrical cord through the metal casing and grounding of the electrical component within the casing to the casing. The casing over and base are attached together with a simple snap-action provided by interfering projections and openings formed on cooperating portions of the base and cover. Temporary mounting openings are formed directly in the base, and a stiff sheet of plastic material is disposed between the base and the electrical component to prevent access to the electrical component through the temporary mounting openings.

Abstract: A ducting system comprising ducts of mainly U-shaped cross-section with bare hollow conductors fitted at the inner surfaces thereof, which conductors are accessible for corresponding contact pins of a contact element to be locked in arbitrary points on the open side of a duct, auxiliary parts being used for interconnecting such ducts and connecting a duct with a current supply.

Abstract: An electrical socket connector is adapted to receive a multiple-pin shrouded plug and has a body containing at least live and neutral sockets and formed with a recess to receive a shroud surrounding the pins of the plug. Moveable shutters are spring biased to close the live and neutral sockets and have cam surface portions extending into the recess to be engaged by the shroud of a plug so as to be moved against the spring bias on insertion of a shrouded plug, thereby to open the shutters.

Abstract: An extractor for removing connectors from high density locations is formed by a pair of hermaphroditic members each pivotally attached to the connector adjacent one end with their opposite ends slidably and pivotally interconnected. Actuation of the extractor causes rotation about the pivots and sliding rotation of the other end to achieve cammed extraction of the connector.

Abstract: Adapter for connection to electric current carrying rails having movable contacts for the electric connection and mechanical locking means including a button operated release mechanism to prevent incorrect insertion of the adapter in the rail.

Abstract: The present invention concerns a connecting device comprising a connector having an inner sleeve and an outer cylindrical sleeve sliding axially in relation to the inner sleeve. The inner sleeve has on its outside a very wide V-shaped groove defining two ramps. The outer sleeve has a series of protuberances resting against the side walls of the groove and biased inwardly by a split ring. The protuberances may be integral with the split ring.

Abstract: A connector holder assembly for use with a wiring harness wiring has a frame adapted to hold a connector contained with the frame by a snap-on cover. A pair of jackscrews secures the frame to a mating connector. The frame is cast with two arms at each end of a back plate. The arms have inboard slots for receiving jackscrews. The jackscrews are retained within the slots by a connector which has detents at its ends which engage the jackscrews when the connector has been positioned between the jackscrews. A stiff spring-like metallic retainer cover for the connector which is snap fastened to the arms of the frame retains the connector between the frame arms and against the backplate of the frame against the force produced on the connector by the wiring harness attached thereto.

Abstract: An environmentally sealed cable connector for terminating wire jacketed cable. The connector includes a body for receiving the cable and a gland nut for securing the cable to the body. A clamping member places the wire jacket in grounding connection with the connector upon securment of the gland nut to the body. The urging means further provides a seal between the body and the cable, preventing hazardous gases from passing therebetween.

Abstract: A wiring device has an entry hole through which an electric cord may be passed. The device has a serrated corner positioned opposite the entry hole and a flexible finger near the entry hole. An electric cord inserted in the entry hole is locked between the finger and the serrated corner.

Abstract: In a computer factory data collection terminal an electrical conduit enclosure for permitting wiring to be brought up through the conduit to the factory data collection terminal and for providing full wiring protection while still permitting the terminal to be installed or detached without opening the unit. A conduit enclosure having a base, cover, conduit fittings and special data and address signal connector and power connections is detachably mounted below the data collection terminal.

Abstract: In an electrical connector of the plug type and a corresponding receptacle therefor, said plug connector comprises a dielectric housing member having terminal-receiving passageways therein in which electrical terminals are latchably secured, and said terminals have contact sections extending forward from said housing member and are electrically connected to electrical conductors of a shielded cable. Metal clamshell members are mounted on said housing member forming an outer contact which extends forward to cover said contact sections of said terminals. The conductive shield of said cable surrounds a rear section of said outer contact and is surrounded by a ferrule member which is crimped to secure said shield to said outer contact, and said clamshell members to said housing; said ferrule is also crimped to an insulating jacket of said cable, and an insulating sleeve is disposed around said outer contact and said cable.

Abstract: In a jack in which a movable contact piece mounted therein is displaced by a plug inserted thereinto and a coiled spring for supplementing the resiliency of the movable contact piece is interposed between a movable part of the movable contact piece and the body of the jack, there is disposed a spring holder between the movable part and the body, whereby the coiled spring is held and excessive displacement of the movable part is prevented.

Abstract: A socket contact for electrical connectors consisting of a contact liner sleeve (16) with a rear sleeve (14) and inner and outer front sleeves (12, 10) assembled to the front and to the contact liner sleeve (16) with the outer sleeve (10) rear portion thereof formed over the rear face (40) of the inner front sleeve (12) to form a well defined retention shoulder (48).

Abstract: Apparatus and method of manufacture for coupling optical power between two strands of fiber optic material in a given direction of propagation. The coupler employs generally parallel, intersecting strands of fiber optic material having the cladding removed on one side thereof to within a few microns of the fiber cores in the region of intersection to permit light transfer between the strands.

Abstract: An interchangeable multi-channel hermaphroditic fiber optic connector (10) for cables (12), having different numbers of optical fibers (18) and contacts (22) therefor, comprises a connector shell (34) having a specifically configured interior surface (38) and a plurality of inserts (26) each having an exterior surface (36) which is configured substantially as the connector shell's interior surface. This substantially similar configuration permits interchangeable insertion of any of the inserts within the connector shell. The inserts have different numbers of cavities (28) in order to accommodate any number of optical fibers and their contacts, without needing to change the entire connector structure.

Abstract: A single polarization optical fiber has an elliptical jacket composed of SiO.sub.2 +F.sub.2 O+P.sub.2 O.sub.5, whereby increase in transmission loss at a long wavelength band is prevented.

Abstract: Disclosed are field sensitive optical displays, and arrangements and methods for inducing fields in the displays and for scanning the displays. In the disclosed embodiments, liquid crystal, optoceramic and electroluminescent materials are utilized. Methods and arrangements for improving the response time of twisted nematic liquid crystal material and for generating color displays are also disclosed. Methods and arrangements are also disclosed for superimposing varying and a dc fields in field sensitive material. Various display patterns such as a movable dot, intersecting lines and a pivoting line can be obtained.

Abstract: Pleochroic azo dyes represented by the formula (I): ##STR1## wherein X represents group --OCOR.sup.1 or --COOR.sup.1 (wherein R.sup.1 represents an alkyl group, an alkoxyalkyl group, an alkoxyphenyl group, an alkylcyclohexyl group, an alkoxyalkylcyclohexyl group, a cycloalkylcyclohexyl group, an alkoxycyclohexyl group, or a phenyl group substituted by a substituent selected from among an alkyl group containing 3 to 18 carbon atoms, an alkoxyalkyl group, a cycloalkyl group, an aryl group, a cyano group, a halogen atom, an acyloxy group, a carboxylic acid ester group, and an arylazo group); Y represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, a cycloalkyl group, an alkoxy group, a nitro group, a cyano group, a carboxylic acid ester group, an acyloxy group, an alkylsulfonyl group, an aryl group, a halogen atom, or group ##STR2## wherein R.sup.2 and R.sup.3 each represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, or R.sup.2 and R.sup.

Abstract: Immersion oils containing aliphatic thio compounds are described. The oils have optical properties and are useful in immersion optics such as fluorescence microscopy.

Abstract: A focus adjusting device for a camera having a varifocal optical system includes a pivotal member having a focusing guiding slot. The pivotal member is movable about a fixed pivot on the camera body. A guide pin fits in the guiding slot of the pivotal member and zoom information transmitting means are provided for moving the guide pin in accordance with the focal length of a zoom lens unit to vary the distance from the pivot to the pin. Focusing means are included for varying the position of the pivotal member according to a set subject distance along with focus coupling means for moving a focus lens unit in corresponding relation to the position of the guide pin with respect to the direction of the optical axis. The device, which is compact, compensates for differences in the focusing position of the focus lens unit due to variations in the focal length.

Abstract: There is disclosed an optical system consisting in a floating assembly of a glass plate and of a focalizing part or lens out of plastic material, for instance a styrene-acrylonitril-copolymer, said focalizing part being stressless joined to said glass plate by an intermediary layer out of transparent material having a controlled viscosity, for instance silicone, the assembly being held joined by its peryphery by a frame structure with interposition of a resilient seal. A low concentration of anti-U.V. material is dispersed within the intermediary layer. Utilization more particularly for concentration solar energy in solar collecting systems.

Abstract: An improved 5-component, 5-lens element inverted telephoto objective lens system is provided comprising from object to image side of a negative meniscus single lens element, a biconvex single lens element, a biconcave single lens element, a positive meniscus single lens element and a positive single lens element. The lens system fulfills the following conditions:______________________________________ (1) N.sub.1 > 1.69 (2) 0.72(d.sub.6 + d.sub.7 + d.sub.8 + d.sub.9) < d.sub.5 < 2.2(d.sub.6 + d.sub.7 + d.sub.8 + d.sub.9) (3) 0.26 f < d.sub.4 < 0.43 f (4) 0.14 f < d.sub.5 < 0.3 f (5) 1.51 f < f.sub.2 + .vertline.f.sub.3 .vertline. < 2.2 f (6) 0.12 f < d.sub.3 < 0.4 f (7) 0.92 f < r.sub.3 < 2.0 f (8) 1.71 f < -r.sub.4 < 4.

Abstract: An objective lens system for endoscopes comprising a first negative meniscus lens component, a second positive meniscus lens component, a third biconvex lens component and a fourth positive cemented doublet component consisting of a positive lens element and a negative lens element, said lens system having a super-wide angle and favorably corrected aberrations, especially spherical aberration and lateral chromatic aberration.

Abstract: A lateral view extender device for Homonymous Hemianopsia is disclosed. The device is particularly useful with eyeglasses having a pair of lenses and a nose bridge separating the pair of lenses. The device includes a dichroic half lens having the combined optical properties of a reflector and a see through lens and means for fixing the dichroic half lens to the nose bridge of the eyeglasses in optical registry with one lens of the pair of lenses for providing at least one optical path through the one lens of the pair of lenses and the dichroic half lens and at least one other optical path over the dichroic half lens. The dichroic lens forms an interior angle with the one lens of the pair of lenses for providing mirror images on the dichroic lens within the one optical path thereby extending the lateral view of a person suffering from Homonymous Hemianopsia proportionally to the interior angle formed between the dichroic lens and the one lens of the pair of lenses.

Abstract: A method and apparatus for objectively determining the visual contrast sensitivity function of a human subject involves subjecting the vision of the human subject to a plurality of sine wave gratings differing in spatial frequency and contrast levels. As the subject views the grating patterns on a video monitor, the brain wave activity of the subject is detected and steady state Fourier spectra of the activity are recorded. In each spectrum corresponding to a grating pattern of a particular spatial frequency, a visual evoked potential component may be distinguished from noise by adjusting the contrast level of the grating pattern. A contrast threshold used in deriving the visual contrast sensitivity function is identified for each grating pattern of a particular spatial frequency by pinpointing the contrast level at which the visual evoked potential component becomes indistinguishable from noise in the spectrum.

Abstract: A microfiche card storage and retrieval system comprising a carousel for storing microfiche cards, card transport means for inserting and retracting microfiche cards from said carousel, said card transport device having an extended position in the plane of its movement, a card load-unload chute disposed above said carousel and defining a card-receiving chute in the plane of movement of said card transport device, the card-receiving chute comprising stop means across the chute to prevent a card from inadvertently being moved into the storage and retrieval system, means for retracting said stop means, means adjacent one edge of said chute for limiting the height of the chute to prevent oversized cards from being inserted through the chute into the storage and retrieval system, and means opposite the insert side of said chute for guiding a microfiche card moved by said transport means into said chute.

Abstract: A light box is for supporting a stack of essentially transparent sheets including photo material which is insensitive to daylight and sensitive to shortwave light, and a record carrier film having transparent regions in the form of the characters or other representations to be produced and an opaque background to shortwave light. The illumination by the light box facilitates positioning of the record carrier film relatively to the photo material, and a grid can be a further help in positioning. A flash device having an aperture, the size of which corresponds to the size of the character or other representation, is for producing the shortwave light to blacken the photo material corresponding to the selected record on the record carrier film.

Abstract: A photographic camera having a configuration like a thin box comprises a camera body and a handle grip. When the camera is used, the camera body is rotated relative to the handle grip through an angle of about 90.degree. to be transverse to the handle grip. When not in use, the handle grip is aligned with the camera body. The handle grip is hollow to receive the camera body therein; and a support housing slidable and permanently disposed in the handle grip is rotatably secured to the camera body.

Abstract: The invention relates to a device for data recording at photographic cameras equipped with a separate film magazine. The device according to the invention is characterized in that it is designed as a separate unit (3), which can be attached detachably on the film magazine (1), and which comprises a microprocessor (8) for controlling predetermined information and a necessary power source (9) as well as optical means (5,13) for information transfer to the emulsion side of the film (1) while the film is being advanced.

Abstract: A focal-plane shutter for a camera comprises a pair of apertured base plates disposed parallel to each other with a predetermined spacing therebetween to form an aperture for exposure, and light-shielding blades mounted between the base plates at a normal position outwardly of one side of the aperture, the blades being adapted to move into the aperture to close the same while being guided by the surfaces of the base plates, the motion of the blades being terminated when part of the blades has moved past the opposite side of the aperture. The shutter further comprises a recess formed in the internal face of at least one of the base plates, the recess being of a dimension sufficient to receive part of a blade on the termination of motion and to provide larger spacing of the base plates at a position beyond the opposite side of the aperture.

Abstract: A cassette for sheet film has a cover and a bottom which are hinged to one another along a longitudinal edge of the cassette. Locking elements for locking the cover and bottom when the cassette is closed are arranged at the opposite longitudinal edge of the cassette. The cover and bottom cooperate to define a film compartment and the bottom has a rigid, flat wall for supporting a sheet of film. The cover has a window for exposing the film in the compartment and is further provided with a slot which slidably receives a shield for protecting the film against light until such time as the film is to be exposed. A resilient rim is mounted on the cover and extends around the window. The rim is arranged to press the margins of the film against the rigid wall of the bottom when the cassette is closed. The hinged connection of the cover and the bottom causes the rim to contact the film progressively as the cassette is closed so that the rim stretches the film flat over the rigid wall of the bottom.

Abstract: A processing apparatus for immersion treating a sheet-like film unit with a processing liquid is provided with a flexible liquid container having a film unit receiving section and a communicating liquid reservoir section. The container is mounted on a pressure-applying device which is operable to engage the exterior of the container and selectively apply compressive pressure thereto for controlling distribution of a liquid within the container to effect immersion treatment of a film unit in the receiving section and for squeegeeing excess liquid from the treated film unit.

Abstract: A data recording camera, which records information on unexposed film concomitant to taking a picture, uses a light source to record the information and for initiating a camera operation related to picture taking, such as firing an electronic flash. A photoelectric sensor in the camera, for example a phototransistor or a photodiode, responds to incident light from the light source and to the discontinuation of such light by undergoing respective electrical changes. A triggering element connected to the photoelectric sensor initiates the camera operation in response to the photoelectric sensor undergoing a particular one of its electrical changes. In the example of an electronic flash, a silicon controlled rectifier (SCR) is connected to the photoelectric sensor. The SCR renders the flash circuit conductive, to fire a flash tube in synchronization with opening of the camera shutter, in response to the photoelectric sensor undergoing an electrical change after the shutter uncovers the light source.

Abstract: Apparatus for supporting and tentering a flexible member on a layer of a gaseous medium. A support member has an array of passages which exit at a surface and which are arranged in at least two outwardly diverging rows which run obliquely to the path of travel of a flexible member. Channels are provided which run parallel to the rows of passages and each of which has a curved edge adjacent to the row of passages. The passages are oriented to emit gaseous medium in a direction having a component in the direction of travel of the flexible member, a component transverse to and outwardly to tenter the flexible member and a component perpendicular to the member. The gaseous medium is exhausted over the curved edges of the channels in a laminar flow.

Abstract: A digital plate maker system to receive graphics and text data and selectively discharge incremental areas of a charged electrophotographic member to form thereon the latent images represented by the graphics and text data, the imaged member thereafter being toned and output from the system. Thereafter, the toned image may be fused on the member and the member being used in an offset lithographic printing press. The digital platemaker system includes an optical system which may form a maximum of 22 individual rays which are direct deflected twice through a field flattening lens and then onto the charged member. The optical system further includes an optical scale or grating which provides electrical signals indicating the precise location of the individual rays along scan lines on the member. The digital plate maker system further includes an electronic system which generates electrical signals to form the 22 individual rays.

Abstract: An electrostatic recording system having a drum 1 carrying a positively charged latent image 14, and a negatively charged cylindrical sleeve 10 having depressions 10a or other ink holding means on its outer surface. The sleeve is rotated into a tank 11 holding an electrically conducting ink 12 which is picked up in the depressions. The sleeve and drum are counter-rotating at different velocities and approach a narrow gap at which point the negatively charged ink is attracted to the positively charged image. Thereafter the inked image is transferred to a sheet of paper and the drum is cleaned and discharged.

Abstract: Illumination apparatus for a three-dimensional enlarging printer in which a moving lamphouse assembly is tilted at angles that vary proportional to the distance of the lamphouse from the center of scan. The tilt angle of the lamphouse is controlled by a motor or the like to direct the maximum illumination available towards the negative and lens associated with the printer and onto the print film to produce a high quality print rapidly.

Abstract: A method and means are provided to facilitate the composition of the layout of material such as the comic and puzzle pages of a newspaper. This is accomplished by employing translucent plastic modules cut to established size standards upon which the artwork to be supported is pasted. These modules with attached artwork are then assembled as desired upon a translucent plastic copy board, locked in place and photographed. The photographs of the modules and applied artwork can be distributed to newspapers desiring to reproduce the comic and puzzle pages so assembled.

Abstract: In a method of and apparatus for making remote measurements of temperature and pressure in a gas, laser beams are transmitted through the gas to a reflecting target, which may be either a solid surface or particulate matter in gas or the gas molecules and the return beams are measured to determine the amount of energy absorbed by the gas. For temperature measurements, the laser beam has a wavelength whereat the gas exhibits a relatively temperature sensitive and pressure insensitive absorption characteristic, whereas for pressure measurements, the laser beam has a wavelength whereat the gas has a relatively pressure sensitive and temperature insensitive absorption characteristic. To reduce the effects of scattering on the absorption measurements, a reference laser beam having a weak absorption characteristic is transmitted colinearly with the data beam having a strong absorption characteristic. The two signals are processed as a ratio to eliminate back scattering that is common to the two beams.

Abstract: A method of determining physical characteristics of a surface. Light or other electromagnetic radiation is directed onto a first portion of a surface and the reflected radiation is received such as by a photodiode. The radiation is also directed onto at least two further portions of the surface and located on either side of and proximate to the first portion. The radiation reflected by the further portions is also received. The radiation reflected from the first portion is compared with the radiation reflected from the two further portions. The radiation and comparison steps are repeated and the comparisons are used to determine a physical characteristic of the surface, such as the presence of one or more flaws. In another embodiment, light or other electromagnetic radiation is used to determine object dimension, such as bore dimension.

Abstract: A three slit interferometric focus control device capable of focal positioning accuracies on the order of 300 angstroms. The device includes a zero path Michelson interferometer with reference and movable legs comprising, respectively, an annular reference mirror and the surface to be brought into position of best focus. A three slit plate positioned between the beamsplitter and energy detection device allows interference of light reflected off the movable and reference surfaces, creating an amplitude modulation signal. The energy detection device will measure a minimum energy intensity at the position of best focus.

Abstract: A method and apparatus for mixing granular, particulate or pulverant material is disclosed. An unhomogenous mixture of two or more such materials is introduced into and moved through a preferably inclined trough structure having rigid side walls and a flexible floor member. At one or more isolated positions on this floor member it is subjected to relatively intense vibrational motion. It is found that such restricted use of vibrational motion results in a thorough yet gentle mixing of granular, particulate or pulverant materials.

Abstract: An apparatus for mixing or homogenizing viscous material is disclosed. Stirrers, comprising multiple vane mixing blades are mounted on a pair of parallel shafts in corresponding spaced apart parallel tiers. Each vane has a working surface inclined relative to the shaft and offset relative to the vanes of an immediately adjacent blade. One shaft is advanced relative to the other so that the vanes intermesh. The inclination of the vanes in one blade is mirrored in sense to the other blade on the adjacent shaft, and the shafts are rotated in opposite sense so that the stirrers in each tier pump the material in the same relative direction when the shafts are so rotated.