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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7475586 | Flow meter calibration apparatus and method A meter calibration apparatus includes a fluid intake conduit, a fluid discharge conduit, and a calibration cylinder connected in fluid communication with the intake and discharge conduits, the calibration cylinder defining a chamber. The apparatus further includes ... | 01/13/2009 |
| 7340366 | Method and apparatus of temperature compensation for integrated circuit chip using on-chip sensor and computation means A method and apparatus of temperature compensation for an integrated circuit using on-chip circuits, sensors, and an algorithm. The chip includes an on-chip reference circuit, an on-chip sensor measuring a parameter relative to the reference, and an on-chip computat... | 03/04/2008 |
| 7171865 | Device for determining at least one parameter of a medium flowing in a conduit A device for determining at least one parameter of a medium which flows in a conduit has a fluid conduit part having a wall which forms a fluid conduit passage and has an insertion opening, a plug sensor having a sensor element, an insertion portion which is inserte... | 02/06/2007 |
| 7171285 | Mobile robot using image sensor and method for measuring moving distance thereof In a mobile robot and a method for measuring a moving distance thereof, by including an image capture unit for photographing the bottom surface according to motion of a mobile robot at a certain intervals and capturing images; a displacement measurer for measuring d... | 01/30/2007 |
| 7157054 | Membrane type gas sensor and method for manufacturing membrane type gas sensor A gas sensor includes a semiconductor substrate and a sensing membrane. The sensing membrane is located at the bottom of a recess, which is formed by etching the substrate, and includes a heater, heater extension electrodes, a gas sensitive film, and gas-sensitive-f... | 01/02/2007 |
| 7114367 | Pulmonary function test calibration system and method A system for calibrating pulmonary function test equipment having syringe means, including a syringe having a cylindrically shaped sidewall, a proximal end with an centrally located orifice, a distal end with an output port, an interior cavity, and a plunger with a ... | 10/03/2006 |
| 7070738 | Analyzer with variable volume ballast chamber and method of analysis An analyzer having a combustion furnace includes a gas flow stream including a combustion detector in the stream of byproducts of combustion and a variable volume ballast chamber for receiving byproducts of combustion and which has a movable piston which moves in re... | 07/04/2006 |
| 6988423 | Universal connecting device that designates an operational mode A controller for a gradient sequential compression system is provided for inflating a plurality of inflatable chambers of one or more compression sleeves according to several different modes of operation. A mode of operation may define the number and selection of ch... | 01/24/2006 |
| 6938455 | Grease supply confirming device and method A grease supply confirming device confirming the supply of a grease into a bearing, according to the present invention includes a detecting member an elastic supporting member and a movable body. The movable body such as a metal spherical body is movably provided in... | 09/06/2005 |
| 6926584 | Dual mode hybrid control and method for CMP slurry A DMHC (dual mode hybrid control) system and method which facilitates enhanced control in the delivery of polishing slurry to a CMP (chemical mechanical polishing) apparatus. The DMHC comprises a linear table and a PID (proportional integrated differential) controll... | 08/09/2005 |
| 6104970 | Crawler inspection vehicle with precise mapping capability A crawler vehicle for inspection of the floor of a tank partially filled with a liquid includes telemetry carried by a tether between the vehicle and the remote station for communication of data and control signals between the vehicle and personnel within... | 08/15/2000 |
| 5251489 | Fluid flow measuring device A fluid flow measuring device having a positive displacement piston in a precise bore glass flowtube, with flexible diaphragms at opposite ends of the flowtube, to seal the flowtube from the ambient environment. The flowtube is filled with a pure fluid or... | 10/12/1993 |
| 5170656 | Pipeline flowmeter prover control system and method A reciprocable piston and cylinder type flowmeter prover is calibrated by providing a liquid conducting manifold for conducting liquid to one chamber formed by the cylinder and piston while displacing fluid from the other chamber to a measuring tank, and ... | 12/15/1992 |
| 5076093 | Flow volume calibrator An apparatus for calibrating a spirometer controls the temperature and moisture content of the gas which it receives and accurately measures the flow rates of gas it receives and discharges. This apparatus includes a housing with an opening through which ... | 12/31/1991 |
| 4996869 | System for selecting valid K-factor data points based upon selected criteria A moveable fluid barrier (16) is driven from an upstream position to a downstream position through a measuring cylinder (18) connected fluidically in series with the flowmeter (22) under test to induce fluid flow therethrough at a flow rate related to the... | 03/05/1991 |
| 4854154 | Apparatus and method for determining the flow characteristics of a volumetric flowmeter A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative passes is connected in the fluid line.... | 08/08/1989 |
| 4766759 | Apparatus and method for determining the flow characteristic of a volumetric flowmeter A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative pulses is connected in the fluid line.... | 08/30/1988 |
| 4637244 | Meter provers A meter prover employs a piston arranged to slide in a bore within a proving cylinder which is coaxially disposed within a surrounding cylindrical shell. The effective area of the upstream face of the piston which can be acted on by fluid pressure is less... | 01/20/1987 |
| 4631951 | Arrangement for testing a flow meter An arrangement for testing a flow meter which issues a first train of pulses in response to the rotation of a rotatable member thereof includes a measuring cylinder-and-piston unit that has a cylinder, a piston slidably received in the cylinder and displa... | 12/30/1986 |
| 4627267 | Apparatus and method for determining the flow characterstic of a volumetric flowmeter A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative pulses is connected in the fluid line.... | 12/09/1986 |
| 4569220 | Flow prover with seal monitor A flow prover with seal monitor includes a housing with a cylinder and a piston-like displacer sealingly conveyed along the cylinder by the fluid flow to be measured. The displacer includes at least one rod that extends telescopically through the housing.... | 02/11/1986 |
| 4481806 | Detector for a meter prover A prover detector comprising a barrel having a longitudinal bore formed therethrough to receive a proximity switch mounted in one end thereof and a piston mounted in the other end thereof to extend from the barrel bore into the prover. The proximity switc... | 11/13/1984 |
| 4481805 | Meter prover apparatus and method According to the invention, fluid is adapted to flow through a piston and cylinder disposed in the housing of a meter prover. The cylinder is telescopingly received within the piston. The fluid is permitted to flow into the piston and cylinder through an ... | 11/13/1984 |
| 4419880 | Apparatus for calibrating fluid flow meters utilizing digital techniques Apparatus for calibrating a fluid flow meter includes a meter prover for detecting a known volume of fluid through the meter including a chamber of known volume, a piston to be moved rectilinearly within the chamber and a motor driving the piston, the cha... | 12/13/1983 |
| 4365503 | Apparatus for calibrating meter prover encoder Apparatus for calibrating a meter prover is disclosed including a chamber taking the form of a substantially perfect right circular cylinder, a piston adapted for rectilinear movement within said cylinder between a first position and a second position, me... | 12/28/1982 |
| 4347731 | Control apparatus for meter prover Apparatus for calibrating a flow meter under test is disclosed as including a chamber having an opening to be coupled by a conduit to the fluid meter under test, a piston to be driven by a motor in a first direction and in a second direction. A first valv... | 09/07/1982 |
| 4324127 | Spirometer calibration device and associated displacement detection system A device for calibrating a Spirometer includes a hand driven syringe having magnetic elements displaced along the shaft of the syringe piston at intervals corresponding to designated volumes. A Hall effect transducer senses the passage of the magnetic whe... | 04/13/1982 |
| 4307601 | Apparatus for calibrating flow meters and the like Measuring apparatus for calibrating flow meters and the like comprising a piston slidably mounted within piston cylinder means which receives gas passing through the flow meter being calibrated to cause the piston to be lifted. A precision encoder is rota... | 12/29/1981 |
| 4266426 | Apparatus for calibrating the rate of delivery of injection pumps for diesel engines For checking the rate of delivery of an injection pump for a Diesel engine, vertical vessel is provided having a movable bottom wall formed by a piston-like member: the latter, via a mechanical transducer, reads the displacements of the piston as a functi... | 05/12/1981 |
| 4168413 | Piston detector switch A piston detector switch adapted to be positioned on a pipe having an orifice in the wall thereof which may be briefly described as comprising a plate securable to the pipe having a bore extending therethrough in open communication with the pipe orifice, ... | 09/18/1979 |
