Abstract: An improved emergency signalling device for use by skiers, hunters and other persons who may be exposed to the outdoors, remote from civilization, and who may in the course of their avocation or occupation become injured or disabled while far removed from contact with assistance. The device comprises a package, which may be secured by straps to a limb or the body of the person, the package containing a signal balloon, a helium container and a reel for paying out a length of tether line together with means for easily inflating the balloon with the helium and sending it aloft to attract the attention of searchers who may be looking for the person in distress. Radar reflective streamers are provided to improve the radar reflectivity of the balloon and thus make it easier to locate by searchers using radar from the air or water.

Abstract: A method for testing a normally closed check valve connected in series with an isolation valve at the outlet of a passive injection system includes adjusting pressure upstream and downstream of the check and isolation valves to an upstream pressure higher than the downstream pressure and then opening and closing the isolation valve. In order to verify proper operation of the check valve, a preoperational test is performed to provide base line data and acceptance criteria. In a typical passive injection system having an accumulator tank, pressure and level changes of liquid in the accumulator tank are recorded during the opening and closing of the isolation valve. The recorded measurements of pressure and level during each test of the check valve are compared with the acceptance criteria to determine whether the check valve operates properly.

Abstract: A measuring bar for determining flatness and deviations therefrom comprises a rigid bar, and a plurality of support feet projecting from the bar. The support feet have free ends which occupy a common, flat plane, the free ends of each of the support feet defining a transverse supporting surface of essentially 0.005 to 0.025 inch across. Measuring devices are carried on the bar for measuring the spacing from the flat plane of at least one point on a target surface against which the support feet free ends rest, the measured point being spaced from the support feet.

Abstract: An apparatus for detecting slag outflow when a molten metal covered by molten slag is poured from one vessel to another by receiving the thermal radiation energy at the microwave frequencies emitted from the pouring stream of the molten metal from said one vessel to another to measure a change in thermal radiation energy caused by the difference in the emissivity of the molten metal and of the molten slag is disclosed. The apparatus comprises; a microwave-focusing mechanism which has a focal point at the measuring target point; a waveguide means one end of which is connected to said microwave-focusing mechanism and which receives the thermal radiation energy from said microwave-focusing mechanism; and a radiometer connected to the other end of said waveguide means to measure the thermal radiation energy at microwave frequencies received through said waveguide means.

Abstract: A shielded tubular gauge for placement between two spaced apart fittings connected to a vessel to show the level of liquid in the vessel, including an elongated frame having a U-shaped cross-sectional configuration, a connection housing secured to each end of the frame and each having an opening therethrough, the opening being internally threaded in the outer portions thereof, a transparent tubular member received in the frame and in the housings openings, a packing nut received in the threaded opening in each of the housings, each of the packing nuts having a portion extending beyond the housing providing a cylindrical surface receivable in the fittings attached to the vessel, an elastomeric packing ring within each housing engaged by the packing nut and compressed against the exterior of the tubular member and a protective shield, such as of transparent material like polycarbonate or expanded metal, received in the frame providing protection for the tubular member.

Abstract: An antenna for receiving satellite broadcast television reception only (TVRO) programming, includes a main reflector dish, a pivot tube for pivotally mounting the reflector dish from a support, and an integrally formed azimuth track and drive comprising an arcuate track bolted to the back of the reflector dish with a trolley drive which engages the pivotal mount to drive the reflector dish along the azimuth to move the dish from satellite to satellite. The integral track and drive rides freely in the vertical direction on the pivotal mount to permit adjustment of the declination and elevation of the main reflector dish without disassembly or removal of the azimuth track and drive.

Abstract: An electronic thermometer comprises a casing, an electric cord capable of being accommodated within the casing so as to be pulled outwardly as desired, a temperature sensing probe mounted at a free end of the cord, and a main body of the thermometer mounted within the casing rotatably with a display field being exposed through the casing, wherein a base end portion of the cord extends outwardly from the peripheral portion of the main body in such a manner in which the main body serves also as a reel for winding the cord therearound. The case is configured in a thin box-like structure and having a probe holding portion formed on one side thereof for removably storing the probe. Reliable electric connection and improved portability of the thermometer is realized.

Abstract: A prism assembly for a single light valve, full-color projector is disclosed. The prism assembly is adapted to polarize and separate the white illumination light into the three primary colors. Three separate input images corresponding to the information for the red, green and blue components of the full image are applied to separate regions of the light valve photoresponsive layer. The prism assembly comprises three channels, one for each of the primary colors. Each channel polarizes the illumination light into P-polarized colored light which is reflected onto the region of the light valve corresponding to the respective input image. The illumination light in each channel is reflected by the respective region of the light valve as respective beams each including an image bearing component of one polarization state and a second beam component of the opposite polarization state.

Abstract: The invention relates to a device for reproduction and tracing by forming an image of an original, at desired scale which is produced by at least one lens, on a screen on which a sheet of photosensitive materials, such as a picture film, or tracing paper is extended, comprising separate illumination systems for reproduction and tracing, wherein the illumination system for tracing is retracted in a retraced position located off the lighting space of the illumination system for reproduction, and turned over so as to eliminate spoilage of the quality of the reproduced picture by diminishing irregular reflection from the illumination system for tracing to the lens when a part of light from the illumination system for reproduction is emitted thereto during the reproduction operation.

Abstract: A parabola antenna has a parabola surface whose thickness is uniformly decreased from an outer circumferential portion to a central portion of the parabola surface. The thickness of the parabola surface is smallest at the central portion.

Abstract: A template set for inscribing a plurality of ellipses with pencil, inking pen or other marking means is disclosed. The invention comprises a two-part unit for small ellipses, or a three-part unit for larger ellipses, enabling an individual ellipse or series or ellipses to be drawn, whether or not such ellipses have common foci or eccentricity. The device can further be used to draw ellipses of varying size and degrees of eccentricity, and having common foci. The device consists of an exterior holder, an interior holder, a large-ellipse guide portion and a small-ellipse guide portion. In the embodiment for drawing large ellipses, a shim is used to maintain the large-ellipse guide portion in spaced relationship from the drafting medium.

Abstract: A back lighted trip indicator for a circuit breaker comprising an opaque tubular shield and a light translucent prism telescopically received in the shield and movable from a position totally within said shield when the manual operator is in the "ON" position to an exposed condition when the manual operator moves to the "OFF" position thereby to reflect ambient light through a frontal face on the prism to back light indicia on the frontal face of the prism.

Abstract: A single-tone inverted toroidal whistle for producing a uni-directional output of about 135 decibels at 100 feet on axis at a frequency of about 420 hertz. A hollow cylinder having a closed base end is combined with a toroidal body to provide an annular sound chamber the working length of which determines the wavelength of sound generated by passage of air or steam under pressure through an annular slit formed in the interior of the cylinder and impinging against a spaced tapered lip on the inner cylindrical wall of the toroidal body.

Abstract: An easily manipulable hand operable device for use in visualization of relative orientations for steering operations to a final azimuth orientation in homing of a fluid craft having an axis of symmetry and guidance system in making an approach in the homing. Three coaxial indicator discs are used.

Abstract: Deformation dilatometers are described for heating, deforming and cooling a test specimen, as well as for measuring changes in the linear dimensions of that specimen. A ferrous metal specimen, that is held between a fixed and a movable fused silica or quartz platen, first is heated by a high frequency induction coil and then crushed by the application of a hydraulic force to the movable platen. The hydraulic force then is withdrawn and, as the specimen is cooled by a jet of quenching gas, changes in its linear dimension are measured by a linear variable differential transformer which is coupled through ceramic pushrods to the platens. Use of fused silica or quartz platens in deformation dilatometers permits the accurate simulation of steel mill forging and rolling operations and enhances the usefulness of the instruments for studying phase changes in steel and determining optimum heating and quenching rates.

Abstract: A device for gauging hoop stress in a female threaded connector member, the stress being caused by tightening of a tapered male threaded member into the female member, including an annular body dimensioned for surrounding the female member with a firm fit therebetween, the body including two discrete complementary half-sections. Each of the half-sections includes an overlapping segment on one end, and each segment has an aperture therein. A pin is provided for insertion through the aligned apertures. An anchor block is fixed to each of the otherwise free ends of the annular body, each of the blocks having a cutout portion therein. A weak link having a tensile strength less than that of the annular body is provided for insertion into the cutout portions for joining the blocks. The weak link clamps the body about the female member and breaks under the application of a predetermined hoop stress to the female member.

Abstract: A integral plastic frame for holding a film slide includes a central window, a recessed bearing surface, which surrounds the window and serves to contact the film slide when it has been inserted to cover the window. The transparency as it is inserted and in its final position is guided between the bearing surface and the retaining elements facing the bearing surface. The retaining elements substantially consist of continuous retaining strips, which extend in the direction in which the film slide is inserted. The retaining strips are attached to mutually opposite sides of a central window of the integral frame member by means of narrow connecting webs, which extend at right angles to the direction in which the film slide is inserted. The plastic material of the frame member is so elastically flexible that an opening through which the film slide can be inserted is formed between the retaining strip and the bearing surface.

Abstract: An axially reciprocatable actuation rod is conducted out of a vacuum chamber and connected with one of the terminals of a vacuum switch by a connecting conductor. In order to exploit the short switching stroke which is characteristic of vacuum switches and thereby reduce the construction expenditure for the connecting conductor, the connecting conductor is constructed as a yoke whose ends are forked. These opposed ends of the connecting conductor engage at one end thereof the actuation rod and at the other end thereof a protrusion on the terminal extending in the direction of the actuation rod. The opposed ends frictionally engage the actuation rod and the protrusion elastically at mutually opposing locations thereof.

Abstract: Heat fluxmeter incorporating a row of thermistors, whose electrical resistance varies significantly with the temperature and which are arranged on the outer surface of the container for accurately measuring the temperature thereof. The range of temperatures in the vicinity of the container is determined by means of a second row of thermistors. It is possible to deduce therefrom the heat flux leaving the container, i.e. the power emitted by the calorigenic material contained therein. The considerable sensitivity of this meter makes it possible to use it without excessively disturbing the thermal equilibrium so that the measurement can be carried out in a very short time.

Abstract: A first body part having a rubber rim wheel and a second body part having a rubber rim wheel are interconnected by a vertical hinge. The first body part has a pencil holder between its wheel and the hinge and the wheels have distance measurement scales. An angle measurement scale is provided for the hinge.