Abstract: A heat pipe configured to remove heat from a nuclear reactor core is disclosed herein. The heat pipe can include an inner housing defining an inner volume configured to accommodate a heat source and an outer housing configured about the inner housing and the heat source. A wick can be positioned between at least a portion of the inner housing and at least a portion of the outer housing, wherein the wick can include a capillary material, and wherein the wick can define an intermediate volume between the inner housing and the outer housing. A working fluid can be positioned within the intermediate volume, wherein the working fluid can evaporate at a first end of the heat pipe and condense at a second end of the heat pipe adjacent to a heat exchanger, and wherein the wick can return condensed working fluid to the first end of the heat pipe.

Abstract: A surveillance camera assembly includes a dome window having a substantially cylindrical section with an inner surface and a first annular end. A substantially hemispherical section has a concave surface and a second annular end. The second annular end is joined to the first annular end of the substantially cylindrical section. The concave surface and the inner surface of the substantially cylindrical section conjointly define a cavity. Both the substantially cylindrical section and the substantially hemispherical section are substantially transparent when viewing outwardly from a position within the cavity. A surveillance camera is received in the cavity of the dome window and swivels relative to the dome window.

Abstract: A camera assembly including first and second rotating members and a motor assembly defining a first axis and operably coupled to first rotating member to drivingly rotate first rotating member. A flexible member operably couples first and second rotating members such that rotation of first rotating member causes rotation of second rotating member. A camera is operably coupled to second rotating member such that rotation of second rotating member repositions camera. The motor assembly includes a flange having an outer circumference defining a plurality of teeth and bearing against a support surface. The outer circumference defines a radially variable distance from first axis such that rotation of outer circumference against support surface displaces first axis relative to second rotational member and thereby adjusts a tensional force in flexible member. At least one pawl mechanism is fixed relative to support surface and is engageable with outer circumference.

Abstract: This invention discloses a camera pan and tilt mechanism wherein both the pan and the tilt motors are affixed to the stationary structure. Conventional systems are designed with the tilt motor affixed to a structure which is moved by the pan motor. Displacing the tilt motor from the structure which is moved by the pan motor allows the pan motor and the enclosing envelope to be smaller, and the design of the tilt motor and movable structure to be less complex. The overall result is a less massive, less costly, more reliable design, with faster dynamic performance.

Abstract: A cable drive apparatus is presented which has minimal cable slippage and backlash. Such a cable drive is particularly well suited for systems requiring accurate positioning and repositioning capabilities, such as motorized camera orientation systems. To achieve minimal slippage on a cable driven pulley, one or more positioning balls are located at fixed locations on the cable, and corresponding positioning holes are located on either pulley. Tensioning means are also provided to remove slack, to minimize the backlash which may result from the stretching of the cable over time. A two pulley system is presented wherein the cable is fixedly attached to one pulley, travels over the other pulley which has the slippage constraining positioning holes, and then to tensioning means which also fixedly attached to the first pulley.

Abstract: A guide (120) for an ignitor plug (105) of a gas turbine engine (10) includes an extend nonrotational bushing (155) having a base (160) slidably received within a hollow sleeve base (135), fixed to the wall of the engine's combustion chamber (65).

Abstract: A fuel nozzle assembly 32 which extends into a flow path 18 for working medium gases is disclosed. Various construction details which decrease the amount of heat transfer to the fuel are developed. The assembly includes an external heat shield 50 and an internal heat shield 98 which provide longitudinally overlapping insulating gaps 52, 102 between the fuel and the hot working medium gases. In particular, the insulating gap 52 extends to the inlet 94 of the fuel nozzle support.

Abstract: A fuel injector assembly for a gas turbine combustor projects a hollow conical spray of fuel. A plurality of discrete surrounding air nozzles 42 project air directly toward the axis 46 of the injector at an angle of 15 degrees, establishing a fuel rich external recirculation zone 52.

Abstract: A fuel nozzle for a gas turbine engine is constructed with two major castings where one is the support and the other is the head, both welded together adjacent the fuel orifice plate. The fuel passage is cast into the support providing a smooth radius from the radial to axial flow path and a smooth transition from the circular to the annular cross section. This configuration allows dimension control over the filming lip and other critical dimensions of the nozzle.

Abstract: The in-arm stylus cleaner includes a cleaner arm mounted for to-and-fro motion in the stylus arm carriage. To clean the stylus, the cleaner arm is retracted, the reproducing stylus is raised back up into the carriage arm, the cleaner arm is freed to allow a wiping element mounted thereon to sweep the stylus tip, and the stylus is then gently lowered onto a turntable-disposed record to resume playback operations.

Abstract: A fuel nozzle designed to reduce pollutant emissions and minimize the buildup of coke in the secondary fuel passage of a dual orifice fuel nozzle for the combustor of a gas turbine engine sizes the orifices and passages of the air and fuel so as to increase the pressure in the secondary passage during its inoperative mode and when the primary fuel passage is in the operative mode and having the air and fuel issuing from both the primary and secondary orifices swirl in the same direction.

Abstract: Coke hereinbefore known to form in the secondary passage of a dual orifice fuel nozzle for the combustor of a turbine type power plant is prevented from forming by imposing increased air pressure in the secondary passage during its inoperative mode and when the primary fuel passage is in the operative mode, without relying on purging or requiring an external air source.