Abstract: The temperatures at the inlet and the outlet of a solar energy collector being flown through by water are detected and compared with a ramp signal to provide a pulse train in which the number of pulses represents the temperature differential. The ramp signal is produced at a repetition rate representing the water flow rate so that the tallied pulses represent the BTU's as absorbed by the collector.

Abstract: An improved system for indicating a tuned broadcast band frequency in which a rotatable turret projects a beam of illumination along a predetermined path towards a dial scale with marking indicia indicating a selected band frequency. A carriage operative to move in a linear path tunes a predetermined band frequency as selected by an operator. The carriage engages a pivotable line on said turret so as to rotate the turret on its axis to project the light beam on the dial scale at a band frequency corresponding to the position of the carriage.

Abstract: The invention relates to a model support system used to support a model in a wind tunnel test section. The model comprises a metric, or measured, half-span 12 supported by a nonmetric, or nonmeasured half-span 11 which is connected to a sting support 13. Moments and forces acting on the metric half-span 12 are measured without interference from the support system during a wind tunnel test.

Abstract: This invention relates to a speed indicating apparatus for a vehicle comprising a plurality of indicator lights and a speed counter, each said indicator lights mounted externally on the rear frame of the vehicle being connected to said speed counter by means of electric wires respectively and said speed counter being connected with a speedometer of the vehicle by means of a soft steel shaft which is in turn connected with gears of a speed change gear of the vehicle so as to transmit the rotating speed thereof to said speedometer and speed counter.

Abstract: A folding disabled vehicle warning symbol or sign is described which is adapted to be mounted on the side of a vehicle such as a truck or the like. The sign comprises a vertically disposed housing which is mounted on the side of the truck and which has spaced-apart front and back walls, upper and lower ends, and an open outer end. A plurality of elongated flat sign segments are pivotally secured together and are pivotally secured to the housing in a manner so that the segments may be pivotally moved from a superposed stored position within the housing to an operative warning position outwardly of the housing. The pivotal sign segments define a triangular disabled vehicle warning symbol when in the warning position. The front and rear surfaces of the sign segments have light reflective material thereon.

Abstract: A bearing support for a flexible belt used on a tire testing machine wherein the belt forms the simulated road surface. The bearing is a hydrodynamic bearing which insures low friction between the belt and its support underneath the tire being tested.

Abstract: Apparatus for supporting transducer heads in a transducer measuring device that is used for measuring or monitoring characteristics of a continuously produced or processed strip material. The apparatus occupies a minimum amount of space and provides for angularly raising the upper transducer head from its measuring position in a direction which is coincident with the direction of travel of the strip material in order to minimize the danger of damage to the head and give ready access to the strip material.

Abstract: The visual indicating system comprises, in one embodiment, a number of pivoting sub-assemblies borne by the carrier so constructed that they are impelled axially upon making contact with the top of the pole, they pivot. Attached to a horizontal portion of each pivoting sub-assembly below the carrier is a shield that normally covers a brightly colored area on the undersurface of the carrier. However, when the subassembly pivots, the horizontal portion moves aside so that the area is visible from the ground. In another embodiment, the pivoting assembly includes a brightly colored flag between the carrier and the masthead which is normally unseen from the ground until the carrier approaches a predetermined position toward the top of the pole whereupon the flag is caused to pivot outwardly of the carrier into view from below.

Abstract: A fluid treatment tank having a fluid barrier between the tank outlet and the tank bottom to thereby form an upper volume above the barrier and a lower volume below the barrier. Said tank also having a substantially fluid-tight pressure equalization means which communicates with the upper and lower volumes to equalize the pressure therebetween without a reduction of the total pressure in the tank.

Abstract: A device is provided for determining the physical qualities, such as amount, ullage, temperature, etc., of liquids, through an operable service hatch, of such tanks containing the liquid and vapors of the liquid and/or an inert gas above the liquid without lowering the pressure or allowing the pressurizing gas or vapors to escape to the atmosphere.

Abstract: Apparatus and methods are disclosed for detecting slippery road conditions directly from a moving vehicle. A special probe is momentarily lowered to the road surface from the moving vehicle. A coefficient of friction is determined by ratio of the verticle and friction forces. A display provides the operator with a proper indication of roadway conditions.

Abstract: Method of testing the lubricating properties of the lubricating means consisting in that in a test master rubbing pair, operating at a definite temperature and with definite unit pressures, or at a definite temperature and with a definite rubbing speed, at the presence of the lubricating means being tested, either the slip rates are gradually decreased in a linear way, or the unit pressures are gradually increased also in a linear way and, at the same time, parameters characterizing these properties are recorded. The rubbing speed is gradually decreased down to a minimum limit value, or the unit pressures are gradually increased to a definite maximum limit value corresponding to a condition, when the electric resistance and the friction force attain the values characteristic for the dry friction.In the device according to the invention the rotary test piece (1) is mounted on a shaft of an electric motor (2).

Abstract: An alarm device for signalling the desired parking position of a vehicle in a garage which includes a channel adapted to be secured to either the ceiling of the garage or to a pair of spaced ceiling joists in the garage. A bracket is adjustable lengthwise of the channel and pivotally supports an actuating arm adapted to be engaged by a roof-mounted antenna on the vehicle to energize an alarm also mounted on the adjustable bracket when the vehicle approaches a predetermined position in the garage.

Abstract: An arrangement for sensing temperature changes at an object, specifically within a transformer or the like, is disclosed herein. In one embodiment, this arrangement utilizes as one of its main components a sensor including a solid glass medium which changes in optical density with changes in temperature, a single optical fiber for directing a beam of light into the glass media, a single optical fiber for collecting the light transmitted through the medium, and an optical means for imaging the transmitted light to the collecting fiber. In addition, in this embodiment, the light is caused to pass through the glass medium such that the amount of light reaching the collecting fiber is linearly dependent upon the temperature at the medium with respect to temperatures within a wide range.

Abstract: A device for detecting the presence of water in a fuel tank comprising a fitting mounted at the lower most portion of said tank having a water sensing alloy on said fitting. The fitting positions the water sensing alloy in the tank in the position where water will tend to collect. The fitting also includes a socket for connecting an indicating device such as an ammeter to determine the presence of water in the tank. The length by which the fitting extends into the tank can be used to determine the depth of water in the tank and when the amount of water collected at the bottom or sump of the tank exceeds a predetermined depth it will be detected by the indicator connected externally to the water sensing alloy. A useful water sensing alloy is comprised of a composition of lead, tin, and zinc each being present in an amount of between about 20-45% by weight, with the composition also containing small amounts of up to about 0.1% of copper and/or up to about 1% of either samarium, ruthenium, vanadium or selenium.

Abstract: An apparatus is proposed for measuring the mass of a flowing medium, and in particular for measuring the air mass of internal combustion engines. The apparatus includes a resistor arranged in the stream of the flowing medium, the temperature and/or resistance parameter of this resistor being controlled in dependence on the mass of the medium, the extent to which the parameter is controlled being a measure of the mass of the flowing medium. The resistor is an element of a bridge circuit comprising at least one further resistor arranged in the stream of the flowing medium. Also included is a tubular member which has an inner surface defining the flow cross section of the flowing medium. Within this tubular member there is situated a probe ring to which both resistors are mounted to be exposed to the flowing medium. Connected to the tubular member is a terminal box within which a hybrid switching circuit is situated.

Abstract: A thrust bearing wear detector is mounted on a positioning apparatus which is capable of moving the sensor a predetermined fixed distance toward and away from a rotating collar fixed to a turbine shaft. The positioning apparatus comprises a fixed piston, a movable piston, and a movable casing in which the pistons are slidable. Additionally, bias means, such as springs, position the pistons and the sensor in a predetermined, fixed position until working fluid is delivered under pressure through channels in the fixed piston. The positioning apparatus of the present invention readily facilitates verification of the proper operation of the wear detector.

Abstract: A luminant pointer for use in a meter is disclosed, which comprises a finger portion having a trapezoidal sectional shape with the transverse width of its upper face being selected to be longer than that of its lower face, and a layer of color paint provided on the lower face of the finger portion. The entire upper face of the finger portion of the pointer having such a construction can thus glow with the color of the paint in spite of the fact that the color paint layer is provided merely on the lower face having a considerably smaller area than that of the upper face of the finger portion of the pointer. Therefore, the amount of the paint required for the luminant indication purpose is decreased to reduce the rate of absorption of light by the paint, thereby obviating the tendency of sharp reductions in the intensity of light advancing from the radially inner end toward the radially outer end of the finger portion of the pointer on the meter dial.

Abstract: This invention is directed for a marker which can be dropped from an airplane so that the pilot of an airplane can see the marker on the ground and know, when he is in the airplane, where the airplane has flown for spraying fertilizer, insecticides, herbicides, and the like. The drop marker comprises two base members and a folded streamer strip of attached at each end to a base member. The drop marker unfolds when falling from the airplane toward the ground. The drop marker, upon reaching the ground and with the streamer strip unfolded, makes it possible for the pilot of the airplane to know where he has sprayed the chemical carried by the airplane.

Abstract: A device for measuring the fill level in a container at least partially filled with a liquid, particularly for determining the liquid level in a fuel tank, in which a measuring resistor, comprising a metallic resistance layer having a great temperature coefficient of the specific resistance is carried by a carrier foil. The portion of the resistance layer disposed in the liquid remains cold, while that portion above the liquid is at a higher temperature, whereby the difference between the present resistance and that of an empty tank is proportional to the fill level within the tank. The change of resistance preferably is measured in connection with that of a comparator resistor which is not heated and compensates for temperature influence etc. An influence on the measurement due to convection in the fuel tank is prevented by means of covering sheets which are spaced a small distance from the resistors by means of suitable spacing strips.