Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4625534 | Crimp cutter blade A crimp cutter blade for gripping and cutting out a top end portion of a terminal wire, in which depressions or recesses are formed on a pair of opposing arms between crimping portions for crimping the terminal wires of electronic parts or the like and cu... | 12/02/1986 |
| 4625535 | Method of forming truss plates A method for quickly manufacturing a connector plate of varying design strength in a minimum size plate for joining wooden members which approximates the ideal connector plate for that particular design, thereby making it unnecessary to use plates of grea... | 12/02/1986 |
| 4625536 | Method of controlling unequal circumferential speed rolling A set-up method for unequal speed circumferential rolling. The setting values of the circumferential speeds of a higher speed roll and a lower speed roll and the roll position are obtained by using, as rolling parameters in a rolling schedule, the inlet a... | 12/02/1986 |
| 4625537 | Localized boss thickening by cold swaging To reduce the length of a tube thickened by swaging and to provide acceptable efficiency in use of material and vessel length for a high performance pressure vessel, the tube is locally corrugated, then conventionally swaged and subsequently pressurized t... | 12/02/1986 |
| 4625538 | Plug grip for fitting expansion plugs The plug grip comprises a first and a second arms pivotally mounted together, with the first arm leading to a bearing shoe member and the second arm causing a raise of a screw of an expansion plug. The second arm comprises two successive bearing points, a... | 12/02/1986 |
| 4625539 | Automatic crimper and crimping die A crimping die assembly comprising a plurality of die fingers, a holding unit for holding the die fingers in a working relationship, the holding unit comprising a retaining ring having a plurality of substantially evenly spaced openings for receiving the ... | 12/02/1986 |
| 4625540 | Conveyor in plastic working machine A conveyor in a plastic working machine, wherein lower dies and upper dies for plastic working of a work in collaboration are disposed on a plurality of working stations, respectively, the stations being set at intervals along the direction in which the w... | 12/02/1986 |
| 4625541 | Apparatus for patterning a cylindrical surface An apparatus for patterning a cylindrical surface comprises a punch held by a holder connected to an arm which is pivotally mounted to permit the punch to strike the cylindrical surface. The cylindrical surface is mounted on a spool which can be rotated r... | 12/02/1986 |
| 4625542 | Radiation power measuring apparatus Apparatus for measuring the power of radiation that includes float means (16) and force balancing means (48, 50, 60, 80). The float means includes a target (46) for the radiation and is constructed such that the net gravitational force, including buoyancy... | 12/02/1986 |
| 4625543 | Method and device for calibrating an analyzer for measuring low ion activity values in a sample stream A sample stream is conditioned by the addition of reagents and the ion concentration is measured by means of a measuring system which can be connected to an arrangement for releasing an appropriate calibrating substance. The calibrating substance used is ... | 12/02/1986 |
| 4625544 | Determining saturation and permeability using mercury capillary pressure curves A method using mercury capillary pressure curves for determining various characteristics of formations. The mercury capillary pressure curve is amplified and small changes are used to compute residual saturation, permeability, Archie's exponent m and the ... | 12/02/1986 |
| 4625545 | Method and apparatus for detecting leaks A method and apparatus for detecting leaks in a test chamber utilizing pressurization of the chamber with a gas, compares the rate of change of the gas pressure in the test chamber with the rate of change of the temperature of that chamber with the differ... | 12/02/1986 |
| 4625546 | Cylinder power balance diagnostic apparatus for internal combustion engine There is provided a cylinder power balance diagnostic apparatus for an internal combustion engine, in which all of the diagnostic procedures are automatically conducted. An ignition signal generated in synchronism with an ignition pulse to be supplied to ... | 12/02/1986 |
| 4625547 | Borehole gravimetry logging A borehole gravimetry survey is carried out by making gravity measurements at a plurality of measurement stations along an interval of the borehole. A moving average gradient is determined for gravity measurements taken from consecutive pairs of such meas... | 12/02/1986 |
| 4625548 | Hydrostatic head pressure sensors for a system to determine fluid level and weight A hydraulic liquid pressure sensor for use in a gas operated pressure sensor system includes a sensor body with a generally circular membrane resting surface, an inlet connected to a peripheral portion of the surface and an outlet opening from a central l... | 12/02/1986 |
| 4625549 | Optical fluid level indicator including float with reflecting means An optical fluid level indicator comprising a light transmitting member having a longitudinal axis, an upper end, and a lower end adapted to extend into a fluid container, the lower end including a first surface having a shape, and a portion projecting do... | 12/02/1986 |
| 4625550 | Method and apparatus for the continuous psychrometric measurement of the concentration of a vaporous component in a gas For the continuous psychometric measurement of the concentration of a vaporous component in a gas, i.e., the moisture content of air, by using a "dry" thermosensor and a "wet" thermosensor, the wet thermosensor is arranged in the open upper end of a verti... | 12/02/1986 |
| 4625551 | Device for detecting the developed power in home pedalling apparatus for bicycles The power detecting or sensing device to be applied to room pedalling apparatus or bicycles essentially comprises in a common envelope a tachometer and a revolving drum, thereon a colored pattern is defined controlled by a dynamometric braking caliper ass... | 12/02/1986 |
| 4625552 | Instrument for separating fluff components An instrument for separating out any one or more of the components of any given sample of fluff. The instrument includes a base having an annular opening formed in its upper surface. A spindle is journaled in the base, and supports a sieve and enclosure o... | 12/02/1986 |
| 4625553 | System to determine the level and weight of liquid in a tank or the like A system for measuring the density of a hydrostatic liquid in a container includes a pair of serially connected pressure sensors mounted in the liquid, a constant volume gas flow source connected to an inlet of one pressure sensor, a second pressure senso... | 12/02/1986 |
| 4625554 | Device for tightening a nut on a fastening pin of a nuclear reactor guiding tube A tightening wrench (5) carrying a measuring cell (8) freely mounted in the hollow part (4) of a wrench (5) and adapted to bear against an end of the pin (2) subjected to the pretension. A detector emitting and receiving ultrasounds (21) disposed inside t... | 12/02/1986 |
| 4625555 | Ultrasonic measurement method, and apparatus therefor In a method and apparatus for ultrasonic measurement, there are provided first and second ultrasonic transducers arranged to directly oppose each other across an object interposed therebetween, and a third ultrasonic transducer, the transducers being so a... | 12/02/1986 |
| 4625556 | Method of layer thickness measurement The layer thickness of an object including a substrate and a layer formed thereon is measured by the following steps. First, with regard to a reference system consisting of a reference substrate and a reference layer formed thereon, which are formed of th... | 12/02/1986 |
| 4625557 | Acoustical imaging system An imaging system for non-destructively imaging the cross-section of a workpiece is taught. The image provided portrays the cross-section of the workpiece taken orthogonal to the surface of the workpiece along an operator selected course on the surface. T... | 12/02/1986 |
| 4625558 | Fuel monitoring systems A fuel monitoring system comprises a centrifugal air separation chamber having input and output Venturi devices. The system is arranged so that fuel from the fuel tank of the aircraft is pumped to the input Venturi device which due to the pressure drop th... | 12/02/1986 |
| 4625559 | Pressure transducer A pressure transducer comprising an elongate hollow outer housing having a pressure sensor diaphragm and externally positioned fixing means which facilitates pressure tight introduction of the diaphragm into a pressure sensing port provided in apparatus c... | 12/02/1986 |
| 4625560 | Capacitive digital integrated circuit pressure transducer A highly accurate and miniaturized pressure transducer is disclosed which includes first and second capacitors as a part of the integrated circuit, which also includes an Eccles-Jordan astable multivibrator. The miniaturization of both the capacitors and ... | 12/02/1986 |
| 4625561 | Silicon capacitive pressure sensor and method of making A capacitive pressure sensor uses two silicon wafers hermetically sealed to each other by recrystallized silicon formed by the migration of a ring of silicon-aluminum eutectic material from the wafer interface to the surface of one wafer. Within the ring ... | 12/02/1986 |
| 4625562 | Amorphous magnetic alloy sensor A stress or strain sensor including a magnetic circuit having at least a part constituted by an amorphous magnetic alloy. For detection of the inductance value of the sensor, a DC magnetic field is superposed on an AC magnetic field so that magnetic domai... | 12/02/1986 |
| 4625563 | Portable bend tester This bend tester is lightweight and portable for on the site use to qualify welders. Primarily, it consists of a frame on a base, and a platform with a yoke on it is elevatable in the frame to bend metal by a plunger mounted to a top plate of said frame.... | 12/02/1986 |
| 4625564 | Vortex flow meter A vortex flow meter includes a vibration sensing element having a sensor responsive to an external vibration and a sensor responsive to a vortex train at vertically opposite ends thereof. The sensing element is fixed to a conduit fulcrumed at an intermedi... | 12/02/1986 |
| 4625565 | Wind velocity sensor A wind velocity sensor provided with a stationary base having a permanent magnet or a Hall element fixed thereon, an elastic plate having the other of the permanent magnet and the Hall element fixed to a portion opposite to the one of the permanent magnet... | 12/02/1986 |
| 4625566 | Mass and force meter Mass and force meter with a body, a load support guided parallely and vertically, a strokeless measuring system and a lever system for transmission of the load acting on the load support to the measuring system. The lever system consists at least partiall... | 12/02/1986 |
| 4625567 | Method and apparatus for the measurement of bearing loads using a ductile wire insert A test bearing is adapted from a standard production bearing for recording the location and magnitude of load applied to the bearing when installed and operated in its intended environment. A groove is typically formed in the stationary raceway of a cylin... | 12/02/1986 |
| 4625568 | System for measuring the engagement pressure between cylinders of a printing press A device for measuring pressure between two cylinders of a press includes a plate mounted to the end of a journal of one of the cylinders in a position perpendicular to the cylinder axis, and a set of electrical proximity sensors measuring the tilting of ... | 12/02/1986 |
| 4625569 | Liquid injection device A liquid injection device, comprising: a pair of a rotor and a stator relatively rotatable in a face-contacting relationship under a liquid-tight state; a plurality of small openings penetrating through the rotor or stator and communicating to a plurality of l... | 12/02/1986 |
| 4625570 | Stock sampling device A device for removing samples of a material which is dropped through a vertical pipeline. The device includes a scoop which can be telescoped into the pipeline through a side mounting track to catch a material sample, and then telescoped out of the pipeli... | 12/02/1986 |
| 4625571 | Grab sampler This invention relates to a grab sampler for liquids especially for crude oil flowing through pipelines. The sampler has a set of concentric tubular members including an outer body with an inlet and outlet, and a sleeve and a hollow piston which are respe... | 12/02/1986 |
| 4625572 | Cylinder pump The invention provides a cylinder pump for an automatic chemical analyzer or the like, which comprises a cylinder and a plunger both made of a rigid material and coupled together in a liquid-tight sliding contact with each other without any elastic member... | 12/02/1986 |
| 4625573 | Magnetic shielding and magnetically shielded borehole core drilling A magnetic shielding member is provided, according to one aspect of the invention, which can be used to effectively shield a borehole core from ambient magnetic fields during drilling of a core specimen from the borehole core. The shielding member compris... | 12/02/1986 |
