Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4497212 | Flangeless electromagnetic flowmeter A flangeless electromagnetic flowmeter unit interposable between the flanged ends of upstream and downstream line pipes for metering fluid passing through the line, the unit being encaged by bolts extending between the flanged pipe ends and being subjecte... | 02/05/1985 |
| 4488438 | Square-wave current generator A square-wave current generator with a power supply section, control elements connected in series across the power supply section, an exciting current detecting resistor connected in series with an excitation coil through which an exciting current flows b... | 12/18/1984 |
| 4483201 | Magnetic-inductive flowmeter A magnetic-inductive flowmeter is disclosed operating with an alternating field but supplied from a source of direct voltage. The inversion is executed with the aid of the excitation coils of the pickup as well as with the aid of a control circuit. In an ... | 11/20/1984 |
| 4470309 | Electromagnetic flowmeter An electromagnetic flowmeter has a ferromagnetic main casing and a nonmagnetic flow speed measuring tube passing through the main casing. A pair of electrodes are diametrically disposed in the measuring tube and insulated from it. Magnetic flux generators... | 09/11/1984 |
| 4467644 | Flow meter A flow meter for detecting and recording a plurality of data points representative of the depth and velocity of liquid flow in an open container. A weighted sensor has a dimpled surface to induce turbulence at low velocities to assure a substantially line... | 08/28/1984 |
| 4462060 | Constant-current duty-cycle driver for electromagnetic flowmeter A driver for the excitation coil in the electromagnet of an electromagnetic flowmeter, wherein the fluid to be metered is conducted through a flow tube to intersect the transverse magnetic flux field created by the electromagnet. The driver includes an a-... | 07/24/1984 |
| 4459857 | Electromagnetic flowmeter An electromagnetic flowmeter for measuring the flow of an electrically conductive fluid through a flow system comprises a flow tube adapted to be connected in the flow system for allowing the fluid to flow therethrough. Coils supported by the flow tube ar... | 07/17/1984 |
| 4459858 | Flow meter having an electromagnetic sensor probe A flow meter for measuring the velocity of fluid flow in a conduit is disclosed, characterized in that an electromagnetic sensor probe is mounted within an opening contained in the conduit for generating electrical signals as a function of the velocity of... | 07/17/1984 |
| 4454766 | Measured value recording device for magnetic-inductive flow meters A measured value recording device for magnetic-inductive flow meters includes a ferromagnetic jacket which snugly encircles an electrically insulating tube piece through which fluid can flow. Measuring electrodes are located in diametrically opposite bore... | 06/19/1984 |
| 4434667 | Permanent magnet flowmeter having improved output terminal means Disclosed is an improved permanent magnet flowmeter capable of withstanding bending stresses in the direction of induced emf signals. The flowmeter includes a unique terminal arrangement integrally formed with the flowmeter by trepanning opposing wall sec... | 03/06/1984 |
| 4434666 | Electromagnetic flowmeters and methods for measuring flow An electromagnetic flowmeter for measuring the mean velocity of a fluid flowing through a duct is described. In one embodiment the electrodes are shaped to provide a uniform weighting function relating fluid velocity distribution over the duct cross secti... | 03/06/1984 |
| 4428241 | Electrode wiring harness for magnetic flowmeter An electrode wiring harness for an electromagnetic flowmeter which includes a non-magnetic metal spool having an insulating liner to define a flow conduit for the fluid to be metered, a pair of electrodes being mounted on the spool at diametrically-oppose... | 01/31/1984 |
| 4420982 | Unitary electromagnetic flowmeter with sealed coils A compact electromagnetic flowmeter unit interposable between the flanged ends of upstream and downstream line pipes for metering fluid passing through the line, the unit being subject to compression by the flanged pipe ends to effect a fluid seal. The fl... | 12/20/1983 |
| 4419899 | Electromagnetic flow meter An electromagnetic flow meter includes an electromagnetic flow meter body having a connecting end for connecting to a pipe in which fluid to be metered is conducted, and a grounding device held between the connecting end of the body and the pipe, the grou... | 12/13/1983 |
| 4409846 | Electromagnetic flow meter An electromagnetic flow meter with less power consumption in which an instantaneous pulsate current with alternately changing polarity at given intervals is fed into an exciting coil, and a velocity of flow of fluid is calculated by using a voltage produc... | 10/18/1983 |
| 4389898 | Electromagnetic velocity transducer A low power, reliable velocity transducer is particularly adapted to measure the flow of a fluid in a metallic pipe. A pair of U-shaped cores of high magnetic permeability are arranged side-by-side and surrounded by an energizing coil to provide an electr... | 06/28/1983 |
| 4388834 | Electromagnetic flowmeter having a monolithic conduit An electromagnetic flowmeter which includes a pair of electrodes molded of electrically-conductive synthetic plastic material disposed at diametrically-opposed points in a flow tube through which the fluid being metered passes to intercept a magnetic fiel... | 06/21/1983 |
| 4373400 | Signal generator for electromagnetic flowmeters A signal generator for an electromagnetic flowmeter provided with a flow tube having an insulated liner through which a fluid to be metered flows to intercept an electromagnetic field established therein to induce a signal depending on flow rate in a pair... | 02/15/1983 |
| 4370892 | Electromagnetic flowmeter having noise suppression network An electromagnetic flowmeter wherein a liquid to be metered is conducted through the flow tube of a primary to intersect a transverse magnetic field produced by an electromagnet. The resultant signal induced in the liquid is transferred to a pair of elect... | 02/01/1983 |
| 4358963 | Unitary electromagnetic flowmeter with sealed coils A compact electromagnetic flowmeter unit interposable between the flanged ends of upstream and downstream line pipes for metering fluid passing through the line, the unit being subject to compression by the flanged pipe ends to effect a fluid seal. The fl... | 11/16/1982 |
| 4358964 | Electromagnetic flowmeter An electromagnetic flowmeter for measuring the flow rate of electrically-conductive fluids through a conduit. A magnetic field generating device has a U-shaped iron core with a gap between the ends thereof and a coil on the core energizable to produce a m... | 11/16/1982 |
| 4346604 | Electromagnetic flow probe An electromagnetic flow probe for measuring fluid flow, and featuring interchangeable magnet and electrode lumen structures. A complex electrode lead pattern is incorporated in a lumen unit through which the fluid flow is conducted. The magnet structure i... | 08/31/1982 |
| 4329879 | Insulating liner for electromagnetic flowmeter tube An electromagnetic flowmeter which includes a flow tube through which the fluid to be metered is conducted, the fluid intercepting a magnetic field to induce a voltage therein which is transferred to a pair of electrodes mounted at diametrically opposed p... | 05/18/1982 |
| 4325261 | Pulsed DC constant current magnetic flowmeter A magnetic flowmeter includes a coil driving circuit which controls both the maximum, steady state current and the current rise time through the coils and makes them independent of the inductance of the particular coil being driven. The maximum current is... | 04/20/1982 |
| 4322982 | Flowmeter A flowmeter for measuring the flow of liquid metal in a conduit has a tubular drag body which extends diametrically into the conduit and terminates, with a closed end, within the flowing liquid. The drag body which generates vortexes in the flow, accommod... | 04/06/1982 |
| 4309909 | Crystal stabilized voltage to frequency converter with digital calibration for flowmeters A voltage controlled oscillator (VCO) system includes a feedback loop for maintaining the linearity, temperature stability and accuracy of the VCO. The feedback loop includes means for producing a fed-back train of pulses having an amplitude equal to a re... | 01/12/1982 |
| 4308752 | Magnetic flowmeter A magnetic flowmeter which generates a signal proportional to the flow rate of a fluid passing through a pipe to intersect a magnetic field whose lines of flux are substantially parallel to a transverse axis normal to the longitudinal axis of the pipe. Th... | 01/05/1982 |
| 4306461 | Meter incorporating a digital fullscale setting device A fullscale setting device for a magnetic flowmeter or the like receives a frequency encoded input and divides it by a mixed number having an integral part and a fractional part to produce an output. The mixed number may represent a flow rate which is tak... | 12/22/1981 |
| 4297895 | Field replaceable electrode assembly for magnetic flowmeter A field replaceable electrode assembly for a magnetic flowmeter or the like in which an electrode may be readily installed in and sealed relative to a fitting provided on a meter body from the exterior of the meter body.... | 11/03/1981 |
| 4297897 | Field replaceable electrode assembly for magnetic flowmeter A field replaceable electrode assembly for a magnetic flowmeter or the like in which an electrode may be readily installed in and sealed relative to a fitting provided on a meter body from the exterior of the meter body. In particular, the end of the elec... | 11/03/1981 |
| 4297896 | Field replaceable electrode assembly for magnetic flowmeter A field replaceable electrode assembly for a magnetic flowmeter or the like in which an electrode may be readily installed in and sealed relative to a fitting provided on a meter body from the exterior of the meter body.... | 11/03/1981 |
| 4296636 | Noise-reducing electrodes for electromagnetic flowmeter An electromagnetic flowmeter wherein a liquid to be metered is conducted through a flow tube to intersect a transverse magnetic field produced by an electromagnet, the resultant signal induced in the liquid being transferred to a pair of electrodes mounte... | 10/27/1981 |
| 4290312 | Signal generator for electromagnetic flowmeter A signal generator for reducing the influence of fluctuations in flow rate distribution in a fluid passing through the flow tube of an electromagnetic flowmeter, which fluid intercepts a magnetic field therein to induce an emf which is transferred to the ... | 09/22/1981 |
| 4287773 | Bidirectional magnetic flowmeter A magnetic flowmeter includes means for sensing the polarity of its output signal and automatically reversing its electrode leads in response to a change in polarity.... | 09/08/1981 |
| 4283958 | Magnetic flowmeter having automatic ranging The internal accuracy of a magnetic flowmeter signal processing chain is preserved throughout an extended flow range by means of an automatic ranging system which automatically multiplies the gain of an amplifier in the chain as the flow rate decreases, a... | 08/18/1981 |
| 4281552 | Electromagnetic flowmeter An electromagnetic flowmeter in which the fluid to be metered is conducted through a flow tube formed of nonmagnetizable metal and provided with an inner lining of electrical-insulating material. The fluid intercepts a transverse electromagnetic field est... | 08/04/1981 |
| 4279166 | Field replaceable electrode assembly for magnetic flowmeter A field replaceable electrode assembly for a magnetic flowmeter or the like in which an electrode may be readily installed in and sealed relative to a fitting provided on a meter body from the exterior of the meter body. The electrode assembly of the pres... | 07/21/1981 |
| 4269071 | Electrodes for an electromagnetic flow meter Electrodes for an electromagnetic flow meter are mounted through a pipe wall using pairs of concentric electrodes electrically insulated from each other and from the mounting pipeline while electrically contacting a fluid in the pipeline being measured fo... | 05/26/1981 |
| 4262542 | Family of magnetic flowmeters A family of magnetic flowmeters of different sizes ranging from at least as small as two inches in diameter to at least as large as twenty inches in diameter share a common low power coil driving circuit and a common signal processing circuit. The meters ... | 04/21/1981 |
| 4261210 | Stacked wafer helical flowmeter An electrical flowmeter having signal electrodes laterally spaced along a line perpendicular to fluid flow and sensitive to a voltage field set up in the fluid by a magnetic field is provided with a plurality of planar helically coiled conductive windings... | 04/14/1981 |
