Abstract: A device for checking the setting on a sports bow having a bow window and a spring-biased arrow guide button projecting from the bow window includes a measuring sleeve provided with a scale to measure the projection of the arrow guide button from the bow window when being in contact with the arrow guide button. For measuring the spring force acting on the arrow guide button, the sleeve accommodates a spring bolt which is provided with a marking. By screwing a setting nut and a counter nut on the sleeve, the spring bolt is forced against the arrow guide button until the marking appears in a viewing window of the sleeve. The spring force can then be read on another scale displayed on the sleeve.

Abstract: An indicator which is carried by a participant capable of delivering an offensive blow in a combat sport. The indicator in a preferred embodiment utilizes a hook and loop fastener to maintain its position on the glove or foot of the participant until contact has been made with an opponent. The opponent has a portion of a hook and pile fastening system located on his person which is compatible with the external portion of the indicator when mounted on the participant's equipment. When a blow is struck, a greater amount of retaining force is developed between the indicator and the opponent's hook and loop fastening system then is present between the indicator and the participant's hook and loop fastening system, causing the indicator to be transferred to the opponent at the point of contact. In one embodiment, a small streamer can be attached to the indicator and sandwiched between the indicator substrate and the participant's equipment.

Abstract: The invention relates to an arrangement for ultrasonic temperature measurement. The arrangement combines an ultrasonic temperature sensor and an electronic operating circuit. The ultrasonic temperature sensor comprises an acoustic waveguide, a second acoustic wave propagating resonant element, which is exposed to the thermal conditions under measurement, and whose resonant frequency becomes an indication of the temperature, and decoupling means inserted between the waveguide and the resonant element to facilitate high "Q" operation of the sensor. The arrangement utilizes torsional waves if a solid waveguide is employed, or internal surface waves with axial symmetry if a hollow waveguide is employed. The sensor is excited by a pulsed CW source, whose carrier is retuned to the resonant frequency of the sensor, and measured as the indication of temperature. The electronic operating circuitry achieves improved accuracy in temperature measurement as the "Q" of the sensor increases.

Abstract: A transportable apparatus for testing the tooth flank profile and tooth flank lines (tooth angle) of gear wheels, in particular gear wheels of large diameter. With this apparatus, prior to the measuring operation, the positioning of the apparatus at the gear wheel to be tested can be carried out simultaneously with the aid of an orientation scanner, and the selection of the tooth gaps least associated with error is simultaneously effected by moving the orientation sensor into various tooth gaps in preparation for the measuring operation and with the aid of a computer ascertaining the measured-value deviations from one another of the various tooth gaps that are entered.

Abstract: An automatic apparatus for testing the spacing of gear teeth in a gear wheel is disclosed, in which the spacing testing is performed for both the left and right flanks of the teeth in a single gear revolution, and the switchover or deflection of the two measuring feelers from one flank to the other against fixed stops is avoided, thereby preventing shocks and vibrations in that measuring position that could produce incorrect measurements.

Abstract: In a rain gauge of the type comprising a counter-balanced tiltable water collecting spoon system as operating a counter the tiltable spoon system is held in its water collecting position by magnetic attraction forces between a permanent magnet and an armature such that the tilting is initiated in accurate responses to a predetermined overfilling of the spoon system, whereby the tilting takes place in a welldefined and rapid manner conditioning a high measuring accuracy of the rain gauge.

Abstract: An inclinometer includes two coplanar electrodes positioned within a chamber of a metallic housing containing a high relative dielectric constant fluid and a gas. With the inclinometer positioned on a level surface equal areas of the two electrodes are immersed in the dielectric fluid creating two equal capacitors formed by the electrodes and the metallic housing. When the inclinometer is rotated through an inclination angle, unequal areas of the electrodes are immersed in the fluid causing a capacitance differential that is a measure of the inclination angle.

Abstract: This disclosure depicts a novel method and apparatus for determining the amount of material to be removed in a door jamb for the installation of an electric door strike. In particular, the apparatus comprises a template comprised of an elongate paperlike sheet in the shape or outline of the front view of the electric door strike to be installed in the door jam, the template having an open area therein through which measurement markings made on the door jam are aligned through the template, the template also having an adhesive material on the back thereof for securing the template firmly to the door jamb while the outline of the door strike is traced onto the jamb. The method described herein is for the purpose of practicing the above-mentioned determination of material to be removed from the door jamb.

Abstract: A device for precisely measuring the depths of cuts of a Mercedes Benz key at the critical depth locations which determine the unique characteristics of each such key. In a first embodiment for measuring a single shelf key, the key is measured by a projecting probe of a circular gauge, by moving the key via a slide plate. The slide plate is incremented by a rack-and-pinion arrangement, the rack forming part of one side edge surface of the slide plate. A stop member cooperates with cut-outs formed in the other side edge surface of the slide plate for holding the slide plate, and therefore the key, at each of the critical locations where depth of cut is to be measured. In the second embodiment, a double shelf key may be measured by the use of a pair of oppositely disposed and aligned probe tips of a pair of circular measuring gauges.

Abstract: Improvements in hole angularity gauges. Known gauges require a plug to fit precisely into the hole, or have limited accuracy and/or require multiple readings. The gauge (10) of the invention provides a tapered plug (16) that will fit snugly into holes having diameters varying from a standard within reasonable tolerances. An indicator member (42) is slidably and pivotably attached to a slider member (56) carried by member (12, 14) of which plug (16) is a part. Spring (80) biases member (42) into contact with an object (2) around the hole being tested when plug (16) is wedged into such hole. Member (42) has two spaced legs (46) having rounded bottom ends (48) that contact object (2), and an indicator arm (52) which extends up through a sleeve portion (14) of member (12, 14). When the head (54) of arm (52) protrudes from a radial slot (36) in sleeve (14), the hole being tested deviates from normal to the surface of the object (2) by more than the permissible amount.

Abstract: A caliper for the direct reading of the size of nuts, boltheads and fittings. On each leg of the caliper is a linear scale, one scale being calibrated in metric units, and the other in English units. When the terminal tips of the caliper are brought into contact with parallel faces of a fitting, the size of the fitting is read on either scale at the point where the inner edges of the legs intersect. All points on the legs of the caliper translate along concentric arcs of circles which have a common virtual pivot point in space, remote from the upper end of the caliper.

Abstract: A device for determining the annual exposure of a site which comprises a viewer having a lens with markings provided thereon for determining the line of travel of the sun at a given latitude for selected dates of the year and indicating the position of the sun at selected times of the day. Interchangeable lenses are provided for different latitudes and are changed by removing a bezel which attaches the lens to the hollow cylindrical body of the device.

Abstract: A sighting device to be used on compound bows includes a mounting plate and a sight assembly. The mounting plate is fastened to a bow belly side with a portion extending beyond the bow front to receive the sight assembly. The sight assembly has a rod, a sleeve, and a wire rod sight with two peep holes. The sight is transversely mounted through the rod and sleeve, the rod journalled through the sleeve. The rod is rotatably retained in the mounting plate and as the rod rotates, the sight pivots to provide both gross and fine sight adjustment.

Abstract: A probe of the type having a movable stylus for detecting contact with an object is disclosed. The stylus is connected to a movable member which is held in its rest position by means of a spring. The movable member is provided with a bore therein to which the stylus is removably connected. The bore extends into the interior of the probe housing and provides access to the spring for adjusting the pressure on the movable member when the stylus is removed.

Abstract: An improved barricade is composed of two identical, hollow, molded plastic panel units which are bolted together at top hinges. Novel detents lock the barricade in an open position for use. This mechanism allows for folding and storage by pushing the legs together with a substantial force. The panel units incorporate reinforcing ribs on the legs that taper off at their top and cooperate with opposing leg members and a specially shaped hinge section to allow for flat, compact storage. Horizontal panels are flush to the surface of the panel unit for optimum strength and space utilization. Bottom portions of the hollow panel units are filled with sand as a ballast to increase stability. A special mounting bracket is attached next to one of the hinges to support attachments such as flashers.

Abstract: The invention relates to improvements in trailer alignment and hook-up systems which are used with conventional hitching and hitch elements. The system comprises a fork-like sighting member attached to the towing vehicle and a flexible sighting pole assembly attached to the trailer hitch. The vehicles are properly aligned when the hitching element bumps the base or tail of the sighting pole causing it to vibrate while being viewed within the fork-like sighting member.

Abstract: To measure the heat transfer coefficient of a sample, an element with temperature sensitive optical properties is placed in contact or implanted in the sample. The element is heated or cooled. The temperature difference between the element and the unheated sample and the rate of heating or cooling indicate the heat transfer coefficient of the sample. In one embodiment, the element is heated or cooled at a constant rate. The heat transfer coefficient of the sample is then inversely related to the difference in temperature between the element and the unheated sample. Alternatively, the element may be heated or cooled at such a rate that the temperature difference between the element and the unheated sample remains substantially constant. The heat transfer coefficient of the sample then varies directly with the rate of heating or cooling. The heat transfer coefficient of a sample is a measure of its composition and other physical properties.

Abstract: A surface tracer having a probe to trace the surface profile of a work continuously and read out the shapes of the work to three-dimensional coordinate electrical signals. The probe is rigidly connected with an X-axis slider which is supported on a base through Y- and Z-axis sliders so as to be slidable perpendicular to each other such that the probe can be slided on the surface of the work. The Z-axis slider is suspended from the base by a suspending spring to support the other X- and Y-axis sliders. Between the base and the X-axis slider a return spring for providing returning force to the probe to its original position is adopted. Pressurized air is supplied to the sliding face of each of the sliders to form an air bearing thereon.

Abstract: A level constructed of clear acrylic plastic including a piece of colored acrylic plastic which serves as a light collector and a continuous passageway in the clear acrylic which reflects the light collected by the piece of colored plastic. By partially filling the passageway with liquid, a line of reflected light appears on the wall of the passageway above the interface between the liquid surface in the passageway and the unfilled portion of the passageway, whereby the level is easier to read than ordinary bubble type levels.

Abstract: An automatic test apparatus for testing circumferential spacing in gears, as well as a further development for testing deviations in tooth thickness, tooth gaps, and gear concentricity, are disclosed, in which with a single revolution of the gear the testing of circumferential spacing is accomplished for both the right and left flanks of the wheel. The values for the deviations in gear concentricity, tooth thickness and tooth gaps are preferably detected at the same time, thereby avoiding the possibility that the measuring feeler can undergo vibration-caused deviations with respect to the tooth flank to be approached for attaining a particular measuring position.