Abstract: An aircraft warning marker for use on a suspended high voltage wire is provided. The marker is composed of a substantially smooth, continuous electrically insulating body and a substantially electrically continuous electrically conducting layer disposed adjacent substantially the entire outer surface of the electrically insulating body. The insulating body and the conducting layer have a sufficiently low combined weight so that the marker is supportable on the wire. The electrically conducting layer of the marker is intended to be electrically connected to the wire.

Abstract: An apparatus adapted to be mounted on a surface grinding machine is provided for testing abrasive grains in single-grit scratch tests. To permit specimen preparation and scratching to be carried out on a single machine without changeover and without reclamping the specimen, and to maintain the infeed in the scratching operation constant by giving the specimen a contour corresponding to the cross-feed error, a belt grinder and a scratching device comprising a support disk, mounted by means of a main flange and a counterflange, and a scratching disk mounted on the main flange and carrying a single grain secured to its periphery along with a force-measuring system disposed thereunder, are designed as a structural unit adapted to be mounted on the spindle of the surface grinding machine, with a belt tensioning arm mounted to the headstock.

Abstract: Presented is a method and means for monitoring the angle of attack of an airfoil and displaying the monitored angle of attack as a visual reference to the pilot.

Abstract: A tire monitor for use with a pair of pneumatic tires comprising a body member having a diaphragm valve mounted in a first chamber formed therein defining first and second chamber portions. A spring is provided in the first chamber portion for yieldably urging the diaphragm valve towards one end of the body member. A valve cap is secured to the other end of the body member and has first, second and third air passageways formed therein. A valve is connected to the third passageway for permitting air under pressure to be supplied to the second chamber portion at times. The diaphragm valve prevents communication between the first and second air passageways when the diaphragm valve is in a first position and also prevents communication between the third passageway and the first and second air passageways when the diaphragm valve is in its first position.

Abstract: When a steel sheet or the like is heated in a furnace to a temperature somewhat higher than the room temperature and is still or moved, its temperature can be measured by detecting the radiant energy therefrom. The measurement is normally difficult due to the influence of background noise of radiant energy from the surroundings, change of the transmittance factor of the environment or atmosphere for radiant energy, and change of the emissivity of the object to be measured.

Abstract: An apparatus (10,10') for in situ testing of a smoke detector (12,12') is set forth. A structure (14,14') has either first (28) and second (30) openings (28,30) or a single opening (28') to an interior chamber (22,22'). Air is impelled through the first opening (28) or the single opening (28') into the chamber (22,22') where it is thoroughly mixed with aerosol particles from a spray can (56,56'). The air-aerosol mixture exits the chamber (22,22') via the second opening (30) or the single opening (28') and travels via a wand structure (38,38') to the vicinity of the smoke detector (12,12').

Abstract: A grain moisture meter and/or a meter for measuring grain bin temperatures, comprises a half-wave pulse oscillator with pulses connecting to the outer shell of a grain container. Pulses pass through the grain and through a central electrode and the signals are amplified and fed to a meter to read the moisture content. A thermistor is in circuit to adjust for variations in temperature of the grain. The device can be adjusted to test grain by three methods. Firstly, it can given an indication of dryness, toughness and dampness to a farmer in the field when combining. Secondly, by use of charts or graphs, it can be used to identify each point on the scale giving an accurate determination of the moisture content of any grade above number four grade and thirdly, by the use of other charts or graphs, accurate readings of any grain grade can be ascertained.

Abstract: A flag waving machine for automatically waving a flag in a figure 8 pattern. A rod provides a support for the flag to be waved, this rod being attached to a pitman arm through a universal joint, the rod being pivotally supported in a bushing. The pitman arm is rotatably driven at one end to provide reciprocal motion of the rod, this reciprocal motion being guided in a figure 8 pattern by means of a guide channel. The channel is formed between a figure 8 shaped wall formed on a base member and a pair of spring-urged elliptical guide members which are also shaped and positioned to form a figure 8, the guide members operating to guide the path of the arm in the channel through a figure 8 pattern.

Abstract: Apparatus to indicate the load on a restraining device subject to tensile loading, especially for a safety belt, the restraining device having an opening for communication with a restraining element, such as a seat belt, and being formed of two parts having different tensile strengths. The parts are displaceable with respect to each other upon loading of the restraining device in tension above a predetermined amount and one of the parts is provided with an indicator sign which becomes visible upon such displacement.

Abstract: A system for measuring transient pore water pressure in the ground utilizes a probe member having a unique arrangement of a pressure sensor and a soil stress isolation filter. The probe member has a body portion with a hollow cavity defined therein. The pressure sensor in the form of a ceramic transducer is mounted in the cavity, and the filter in the form of a circumferential gap formed on the body communicates with the cavity. The filter is also configured for isolating the sensor from effective soil fabric stresses while allowing access to the transducer by pore water pressure. A coupling medium in the form of silicon grease fills the cavity so as to transmit the pore water pressure to the transducer.

Abstract: Disclosed is a capacitance level measuring device comprised of a container whose level is to be measured and a probe inserted into and spaced from the container. The capacitance between the probe and container varies in relation to the level in the container. A capacitance measuring circuit determines the capacitance between the probe and container and thus indicates the level in the container. The integrity of the probe is verified by constructing the probe so as to include it in a series circuit, as well as the capacitance measuring circuit, and a lack of continuity in the probe is indicative of questionable probe integrity. The question as to the probe's integrity would indicate a questionable level indication from the capacitance measuring circuit. Various probe constructions are also disclosed.

Abstract: A shallow water environmental/oceanographic measurement system for real time monitoring of specific parameters at a particular location. A three point moored buoy is anchored over the particular location. Bottom mounted sensors to measure the specific parameters are situated generally within the area of the three point mooring area. Sensor data is transmitted via cable to the buoy from where it is telemetered to a shore station.

Abstract: A transmission ratio indicator has a lens assembly with a ratio selection indicia imprinted thereon. The transmission selector lever or an indicator associated therewith is selectively movable to various ratios and is aligned with the indicia to indicate the transmission operating condition. The lens assembly is secured in a housing by a resilient member and interengaging toothed portions formed on the lens assembly and housing. The lens assembly toothed portion can be disengaged from the housing toothed portion by displacement of the resilient member through application of a force to the lens assembly. When tooth disengagement has been attained, the lens assembly can be moved in the housing to attain proper alignment of the indicia and the shift lever or indicator. The adjusted position of the lens assembly is maintained by the resilient member enforcing the reengagement of the toothed portions.

Abstract: A fluid container, e.g. in an air filter or lubricator, has a metal bowl with a sight glass comprising an elongate light-transmitting member of longitudinally tapered form. The sight glass member is slidable into a complementary tapered slot or recess defined by a flange integral with the bowl and overlying a flat wall portion provided with apertures to the main volume of the bowl and the space between said wall portion and the member adjacent top and bottom regions of the member respectively.

Abstract: The invention relates to a remote control temperature sensor having a capsule containing an expansible material and a capillary tube which connects the capsule to a radiator valve or the like. The temperature sensor has a housing in which the capsule in rotatably mounted and the housing is a wall where the temperature is to be monitored. The capillary tube is wound around the capsule and is dispensible therefrom any desired distance less than the length of the tube to the radiator valve to which the sensor is to be connected.

Abstract: A water detecting system for detecting water in the bearings and lubricant reservoir system of a sealed bearing rotary rock bit permits detection and removal of water to decrease premature bearing failure caused by the presence of water on the bearing surface.

Abstract: The platinum resistive sensor of a temperature measuring surface probe has a resistance greater than the resistance to which the associated meter is calibrated. This provides a compensation that is a function of temperature and decreases errors due to heat loss from the probe. An immersion probe having no heat loss can be used interchangeably with the same meter by adding sufficient fixed resistances in the circuits of the two probes to provide equal resistance outputs to the meter from both the probe that experiences no loss and the one that does, with the meter being calibrated to a standard resistance curve.

Abstract: A clip-on bookmark for finding a place in a book is disclosed wherein a substantially planar book marking member has two opposed covers with at least one edge portion with indicia, such as advertising message, associated with at least a portion of the covers. A slot is formed by the marking member along the edge portion and means for removably fastening the marking member to the book is received by the slot. The indicia may be imprinted directly onto the covers or may be contained on an item for receiving the indicia which is laminated to the covers, which may be of transparent, semi-rigid material, such as vinyl plastic. The covers may also form a pocket for removably holding a card on which the indicia is contained. The fastening member comprises oppositely positioned first and second legs joined at a reverse bend and form an open side opposite the reverse bend. The first leg is mounted in the slot and the second leg is positioned outside the marking member.

Abstract: An integrated circuit device is disclosed for sensing dew point which uses integrated circuit techniques supported on a suitable substrate. Four semi-conductor junctions are used which are a Peltier junction or a junction capable of emitting or absorbing heat, a light-emitting junction, a junction that generates electrical current when exposed to light and a temperature sensing junction. The circuit cooperates to control time and switch the current through the Peltier junction to heat and cool it. The light-emitting junction emits light onto the reflecting surface. The light sensing means senses the reflected light, and the Peltier junction selectively heats and cools the reflecting surface causing moisture to condense on the surface which changes the reflecting properties of the surface and changes the amount of light to the light sensing junction. Current through the Peltier junction is then switched causing the Peltier junction to heat the reflecting surface evaporating the moisture.

Abstract: A black powder flamespread tester is disclosed in which powder to be qualed is packed in a sample tube provided with a plurality of sight holes. Light sensors are disposed adjacent each sight hole and emit signals upon flame front passage of the sight hole. The sample tube is removably secured to an ignition head which contains an electrically actuated pyrotechnic squib. The squib discharges gases into a transition chamber from which the gases pass through orifices in an orifice plate, through a void volume into the black powder bed, which ignites the black powder. The ignition head is removably secured to a tester chamber in which the sample holder is received. Light sensors are housed in a separate fin which is removably received in an aperture in the tester chamber wall. After the squib gas ignites the powder bed, the output signal of each light sensor increases to saturation as the flame front passes its respective sight hole.