Abstract: An apparatus for guiding a moving web, particularly in an electrophotographic printing machine of the type having an endless photoreceptor belt supported by a plurality of rolls and arranged to move in a predetermined path through a plurality of processing stations disposed therealong the web being of the type which is supported by a plurality of rolls. A roll for supporting the web and in frictional contact therewith is adapted for rotational movement about a first axis. A roll support in the form of a dead shaft allows the roll laterally move to pivot about a second axis in a direction substantially normal to the predetermined path direction. This is accomplished by supporting the dead shaft on a V-groove roller which rides in a track substantially along the arc of rotation normal to the predetermined path direction.

Abstract: A combined syringe and hub assembly in which the syringe comprises a hollow barrel and a slidable plunger therein. The hub comprises a body with an open cavity and a cannula in fluid communication therewith. A mating detent mechanism is provided on the syringe and the hub for connecting same in a snap-fit relationship. This detent mechanism also provides for the connection of the hub to the syringe in a tight fit relationship for an essentially non-separable functional union of the syringe and hub components. A shield is preferably removably connected to the hub and serves to protect the cannula prior to use of the syringe.

Abstract: A decorative roach trap including a rectangularly shaped hollow housing having the front wall thereof formed with a window behind which is removably mounted a decorative insert displaying a selected scene. The housing is formed in one end with a transversely extending slot into which is inserted a poisonous card impregnated with roach poison. The walls of the housing are formed with roach entry doors and the back of the housing is formed with adhesive pads for suspending the housing from a room wall to thus present a decorative appearance while concealing the true purpose of the roach trap.

Abstract: An improved thrust control system is provided for controlling thrust output of a gas turbine engine in a manner which automatically compensates for engine deterioration and corresponding changes in engine performance. The system is further adapted to control the thrust output with at least a pair of thrust-indicating parameters, such as engine speed and temperature.

Abstract: A thrust control system is provided for varying the thrust output of a gas turbine engine. The system is adapted to control the thrust output of the engine in a first mode in accordance with at least a pair of thrust-indicating parameters. The system is further adapted to control thrust output of the engine in a second mode in accordance with one of the thrust-indicating parameters.

Abstract: Ultrasonic imaging techniques are subject to interference from whiteout, a component at insonification frequency in the image signal. A technique for separating the image signal from whiteout by mixing the received ultrasonic radiation with another frequency is described. In one form using an electron beam to scan a transducer mosaic the beam is modulated and mixing occurs between the transducer and a signal plate. A filter connected to the signal plate selects a mixing product containing the image signal and rejects the insonification and beam frequencies.

Abstract: In a method and apparatus for recovering oil products from oil shale and like materials, controlled amounts of raw oil shale are delivered into an upper inlet of a downwardly sloping retort chamber that is constructed as readily portable. The raw oil shale is first moved in a direction countercurrent to gravity flow and crushed in the retort chamber by means of a rotating member that also serves to retain the oil shale in the retort chamber until a satisfactory recovery is completed. The crushed oil shale is confined to a relatively thin, downwardly moving layer in contact with a heated, inner, annular wall surface and moves by gravity flow between the inlet and a lower outlet to produce oil product vapors that rise to an upper portion of the retort chamber. The moving layer of the oil shale becomes spent as it passes through the retort chamber and finally is selectively discharged through the lower outlet.

Abstract: A process is described for making optical circuits on LiTaO.sub.3 substrates. The process involves putting down an epitaxial layer of LiNbO.sub.3 on the LiTaO.sub.3 substrates. Growth is preferably carried out on certain planes of the LiTaO.sub.3. These optical circuits are unique in that they are smooth, uniform in thickness and have a refractive index significantly larger than that of the substrate. This is advantageous in optical circuitry, since the optical modes in the circuits are quite distinct and can be coupled separately using such light sources as lasers and light emitting diodes.

Abstract: A design technique, method and apparatus for controlling the bypass gas stream pressure and varying the bypass ratio of a mixed flow gas turbine engine in order to achieve improved performance. The disclosed preferred embodiments each include a unique mixing device for combining the core and bypass gas streams which includes means for varying the area at which the bypass stream is injected into the core stream. The variable area mixing device permits the static pressures of the core and bypass streams to be balanced prior to mixing at widely varying bypass stream dynamic pressure levels.

Abstract: A thermoelectric battery comprises a thermoelectric module in the form of a matrix of rods of alternately p- and n-type semi-conductor material connected together in the manner of a thermopile. The thermoelectric module is suspended in a casing in contact at one end with a heat sink and having attached at the other end a radio-isotope fuel capsule. The attachment of the fuel capsule is supported against shocks or rapid accelerations by a combination of spring mounting and a fibre spider.