Abstract: A combined heading and depth sensor for acquisition of both compass heading and depth data and transmission of the combined data over a two wire communication link as a single packet of information to a remote data acquisition unit. The sensor includes a remote reading compass assembly, a depth sensor and circuitry to interface the compass and depth sensors to the communication link. A communication protocol is defined permitting addressable interrogation of a plurality of combined heading and depth sensors over the two wire link.
Abstract: A drawing aid for assisting in the marking of lines or other markings on sheet material incorporates a blade-like portion (2) which is connected with a location region (1A, 2A) which includes means (4, 5) deformable relative to the blade-like portion to be able to provide abutment surfaces which enable the aid to so co-operate with the actual edge of a sheet (8) of flexible or non-rigid material such as a sheet of paper as to use the edge (11) as the guide for the aid during the positional adjustment thereof to the location at which it is desired to draw lines or the like on the sheet (8). When the aid is engaged with a sheet edge (11) a part (1A, 2A) of the aid (1) presses on the sheet marginal edge (11A) to remove any buckles etc. and also to prevent any relative displacement of aid and sheet.
Abstract: An alternate action push-push switch is disclosed, having a housing with a dielectric bar portion; a plurality of conductive terminals; a plurality of conductive spring contactors having an inclined segment in proximity to the dielectric bar portion and a contact segment in proximity to the terminal contact portion; at least one push member slideably disposed at least partially within the housing; an alternate action switch mechanism having a closed loop cam slot, a cam follower, and a resilient spring disposed between the housing and the push member, to provide unidirectional travel of the cam follower in the cam slot as the push member is alternately biased between first and second operating positions. More than one push member may be used to supply multiple switching configurations. A protrusion on a first push member may be adapted to actuate an adjoining second push member, while allowing the second push member to be operated independently of the first push member.
June 20, 1985
Date of Patent:
June 2, 1987
John D. VanBenthuysen, John Zdanys, Jr., Matthew D. Nold
Abstract: The dropping of pressure for the gas supply in respirators, below a minimum pressure, is reported to the wearer by an acoustic alarm device. To make it possible for the wearer to check whether a warning signal heard comes from his own equipment or not, it is provided that the alarm device has a manipulator which adjusts the sound-generating region.
Abstract: A tank contents gauge is disclosed having two pressure sensors to sense the liquid pressure at two tank positions at known vertical separation, a port to sense the ambient pressure in the tank, and a transducer to which the three pressure readings are transmitted one at a time by a switching mechanism. If the transducer is a differential transducer, its second side is connected to the port to allow (1) comparison of the pressure readings with the ambient pressure reading and (2) determination of transducer offset to adjust the calculations to give accurate readings. The readings are analysed by a data processing system which can provide volume and weight readings by internal look-up calibration tables. The system may also control the switching mechanism. Specific gravity values can be calculated from the pressure readings and the known vertical separation; the values can be stored in the system for use when the tank contents approaches, or falls below, the level of the upper sensor.
Abstract: A system for determining the flow rate and temperature of air moving through a duct including a sampling or sensing head for sampling the air moving through the duct, a flow rate sensor connected to the sensing head for providing an output signal relating to the flow rate of air moving through the duct based upon the sampling of that air, and a temperature sensor connected to the sensing head for determining the temperature of the air moving through the duct based upon the sampling of the air moving through the duct.
Abstract: There is disclosed an apparatus of the bubble type for accurately measuring the quantity of liquid in a tank. The apparatus functions by supplying an accurately measured quantity of purge gas at an accurately controlled predetermined pressure and flow rate through a selector valve to a tube extending to the bottom of any one of a number of liquid-containing tanks to be monitored. When the apparatus is actuated, purge gas first clears the tube of substantially all liquid originally disposed therein and then stabilizes at a pressure which accurately reflects the liquid depth in the tank. A method of making such measurements is also disclosed.
Abstract: A microfilm reader with a lens holder moved independently of a lighting unit at right angles in relation to the beam path by means of a drive unit. This renders it possible to correctly position any of a plurality of lenses arranged side by side in the lens holder in relation to the frame to be projected. Given that the lighting unit and the lens holder are capable of moving independently of each other, it is furthermore possible to shift the lighting unit into a position above the respective frame to be projected to obtain an image that is optimally illuminated.
October 10, 1985
Date of Patent:
May 19, 1987
MAP Mikrofilm Apparatebau Dr. Poehler GmbH & Co. KG
Abstract: A method of measuring the temperature in a high pressure furnace of a hot isostatic pressing apparatus, wherein a closed-end pipe having its inside communicated with the inside of the high pressure furnace and enabling a pressure medium to pass therethrough is disposed in the furnace, an incident top end of an optical fiber, a bundle of optical fibers or like other equivalent optical rod-like memeber is disposed to the open end of the closed-end pipe so as to be capable of receiving thermally radiated light from the inside of the closed-ended pipe and an exit rear end thereof is led out through a cover and to the outside of said high pressure vessel and a measuring system is connected to said exit rear end to detect heat radiation power from the top end of the closed-end pipe to thereby measure the temperature inside of the furnace.
Abstract: An automobile door switch bumper comprises a main body having a base portion, at least one hollow leg depending from the base portion and having a through-hole for receiving a pin, and a plurality of radially spaced slits defining divisions of the hollow leg and a soft peripheral wall extending upwardly from the edge of the base portion, whereby the door switch bumper is fixed on the door panel by thrusting the pin into the through-hole to radially spread the divisions.
Abstract: The method and apparatus for testing the vapor transmission characteristics of a sheet material which comprises disposing said material at an interface between an aqueous solution and a plenum chamber, maintaining the temperature of the solution at a predetermined level, maintaining the temperature and humidity in the plenum chamber at a predetermined level and measuring the chamge in concentration of the solute in the solution over a predetermined period of time.
Abstract: It is proposed to store spent nuclear fuel elements in welded-shut steel containers, which are filled with argon at about 2 atmospheres pressure. It is desirable to be able periodically to check the containers for leaks. The invention proposes to do this by providing apparatus for sensing the pressure within the container from outside the container. To achieve this, a pressure responsive bellows is mounted inside the container, such that changes in the container pressure move a metal plate attached to the bellows towards or away from a portion of the inside wall of the container. Then, if the container starts to develop a leak, the pressure will begin to drop, and the gap between the metal plate and the wall will change. This gap can be sensed from outside the container, by an ultrasonic pulse echo technique. Preferably, the bellows and plate are mounted within the head of the combined valve and lifting pintle by which the container is sealed.
November 16, 1984
Date of Patent:
May 12, 1987
Eric Metcalf, Peter Ormiston, Michael J. Skinner, Bruce J. Pike
Abstract: An antenna system is provided with a plurality of telescoped antenna sections which are extended and contracted by an operating wire connected to the uppermost antenna section. The wire is made of a relatively rigid material and has a width of 1.5.about.2.2 times its thickness. There is also provided a clutch for selectively operating the antenna by a motor or the human hand.
Abstract: A temperature-monitoring and -witnessing device has an at least partially transparent container forming a pair of adjacent chambers at least one of which is substantially closed and formed with a passage between the chambers, a valve including a metallic shape-memory element that deforms from one shape to another shape when cooled to a predetermined transition temperature for blocking the passage when the element is of the one shape and for unblocking the passage when the element is of the other shape, a body of liquid in the one closed chamber and confined therein when the shape-memory element is of the one shape, and a dye or the like in the other chamber capable of coloring the liquid. Thus the liquid will only be colored when the element has deformed to the other shape and the device is below the transition temperature. Normally the liquid has a freezing point generally at the transition temperature.
Abstract: Apparatus and method for setting knife blade depth. The apparatus comprises a magnification device and a removable tray in operative engagement with a digital micrometer. The method comprises the steps of positioning the edge of the knife holder flush with a fixed vertical plane extending through a reticle axis within the magnification device, zeroing the micrometer, rotating the micrometer handle until the tray and edge of the knife holder have moved a predetermined distance away from the fixed plane, and adjusting the knife blade until the edge of the knife blade is flush with the fixed plane.
Abstract: In a calibration warning device for a thermocouple, the thermocouple is connected to input terminals (10) of an operational amplifier (12) provided with negative feedback. The output is applied to the base of a transistor (14) controlling the current supplied to a mercury coulometer (18). When the coulometer indicator reaches full-scale deflection, the thermocouple is due to be recalibrated. The invention utilizes the face that the drift curve of a thermocouple can be matched to a sufficiently high accuracy by a suitable choice of transistor characteristic and amplifier gain, as is explained in the specification.
Abstract: A hand-held measuring device including an elongated base having a pair of opposed parallel metric measuring scales on the upper face thereof, a slider slidably mounted on the base having a linear indicator perpendicular to the axis of the base and a holder device for holding the stamp on the base under the slider while the slider is being moved from one end of the printed border on the stamp to the other. The left hand edge of the printed border of the stamp must be zeroed at the zero points of both scales using the indicator line. The slider is then slid to the opposite printed border on the face of the stamp while the holding means is held firmly so that the indicator line registers therewith. The precise dimension of the distance across the face of the stamp to the right hand printed border can then be read off of both scales. The indicator inscribed on the slider is perpendicular to the axis of the base. The holding device can be a thin flexible folded over piece of celluloid type plastic.
Abstract: A sensing head of a measuring machine comprises three straight line guiding systems for respective x, y and Z directions. For weight compensation of each single straight line guiding system, a first spring pair is arranged between a fixed beam element and a beam of the first straight line guiding system. This compensates the weight loading the first straight line guiding system. Between the beam of the first straight line guiding system and a beam of the second straight line guiding system, a second spring pair is arranged which compensates the weight loading the second straight line guiding system. Between the beam of the second straight line guiding system and a beam of the third straight line guiding system, a third spring pair is arranged which compensates the weight loading the third straight line guiding system.
Abstract: A temperature sensor which is flush mounted on a wall of a room in which the temperature is sensed. A mounting plate secured to the wall has a cavity in its face which receives an aluminum sensor plate and an insulating block which thermally insulates the sensor plate from the mounting plate. A temperature sensing integrated circuit contacts the back side of the sensor plate and has electrical leads which extend to the back side of a printed circuit board mounted in a pocket on the back side of the mounting plate. The integrated circuit acts as a current source having its output signal enhanced by active solid state circuit components mounted on the back side of the circuit board where their heat is dissipated by conduction through the mounting plate and wall and by convection and radiation into the wall cavity to avoid affecting the sensor plate. The circuitry allows active factory calibration and eliminates adverse effects on the signal caused by background environmental noise.
Abstract: A method of more accurately measuring the true surface temperature of metal alloy objects without contacting the same. The surfaces of the objects have unknown emissivities that change and that are less than unity. The method includes the step of providing objects having surfaces that radiate infrared energy. The radiated energy is measured at two wavelengths, and a first measurement is provided that is a function of the ratio of the energies at the two wavelengths. The radiated energy is also measured at a single, narrow band wavelength, and a second measurement is provided that is a function of the radiated energy. The two measurements are then electrically combined to provide measurements of radiated energy and thus temperature measurements that are or at least are closer to the true temperature than either of the first or second measurements.
April 7, 1986
Date of Patent:
April 21, 1987
Aluminum Company of America
Nicholaas L. Brouwer, John M. Urbanic, Albert R. Anderson