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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 5403533 | Process for lining a tube A measuring tube for a flowmeter and a process for making the measuring tube. The measuring tube is lined with a tubular lining of thermoplastic material, particularly PTFE or PFA, which comes into contact with the measured substance which flows through t... | 04/04/1995 |
| 5375475 | Device to measure the flowrate in a partially full line Device to measure the flowrate of a fluid flowing in a partially full line, such as a canal or open channel, with coils arranged above and below the partially full line to generate a magnetic field extending essentially vertically through the partially fu... | 12/27/1994 |
| 5370000 | Magnetic flowmeter with fault detection A circuit for detecting faults in a magmeter system in which an electrically conductive fluid flows which is maintained at a reference potential. The circuit includes at least two electrodes in contact with the fluid. The electrode signals are conducted t... | 12/06/1994 |
| 5327787 | Electromagnetic flow meter with weir A weir is placed across a pipe section and an electromagnetic flow meter with multiple electrodes is located upstream of the weir. The liquid level and velocity of fluid in the pipe section are evaluated by the electromagnetic flow meter to determine flow... | 07/12/1994 |
| 5301556 | Flow measuring apparatus A liquid flow measuring system which, by means of a suitable timing sequence, is able to detect unbalanced voltage generation which occurs when the tube element through which the liquid is flowing is not completely full and, by means of a correction proce... | 04/12/1994 |
| 5299461 | Fluid flowrate measuring apparatus Fluid flowrate measuring apparatus in which magnet coils, positioned symmetrically about a pipe through which fluid flows, are excited to generate magnetic fields during four periods of an excitation cycle which are additive during the first period of exc... | 04/05/1994 |
| 5243596 | Network architecture suitable for multicasting and resource locking A data communications network in which multiple host processors are linked in a ring network by respective network interface processors or nodes includes circuitry in each of the nodes which aids in the implementation of a distributed resource locking sch... | 09/07/1993 |
| 5235595 | Packet switching This invention is concerned with packet switching techniques, protocols, networks, and equipment for use on a local area or wide area scale. Packets which include a fixed-length data field and memory offset field are employed so that packeting, block data... | 08/10/1993 |
| 5187988 | Apparatus for measuring the flow of a fluid medium Apparatus for measuring the flow of a fluid medium which flows upward through a substantially vertically mounted tube section having a suspended body in the tube section. The vertical position of the suspended body depends on the intensity of the flow. Mo... | 02/23/1993 |
| 5019256 | Ultraviolet lamp rack assembly A UV lamp rack assembly usable in an ultraviolet ray wastewater treatment system, the rack including a horizontal hanger bar. When the assembly is installed in a channel through which a stream of wastewater to be treated is conducted, the bar is then supp... | 05/28/1991 |
| 4972724 | Coriolis-type mass flowmeter having a straight measuring tube A flowmeter of the Coriolis type in which the fluid to be metered is conducted through a straight measuring tube attached at its inlet and outlet ends to fixed supports, whereby the tube is free to vibrate in a circular path as well as to torsionally osci... | 11/27/1990 |
| 4957005 | Coriolis-type flowmeter A mass flowmeter of the Coriolis-type in which fluid to be metered is conducted through a flow tube which is coiled to define a helix having a pair of identical measuring loops forming a double loop, on either side of which is an isolation loop. The fluid... | 09/18/1990 |
| 4953409 | Noise and offset voltage-compensated electromagnetic flowmeter An electromagnetic flowmeter whose primary includes a flow tube through which the fluid to be metered is conducted to intersect a magnetic field and thereby induce a voltage therein that is transferred to electrodes to produce an electrode signal as a fun... | 09/04/1990 |
| 4953408 | Capacitive type electromagnetic flowmeter An electromagnetic flowmeter in whose primary the fluid to be metered is conducted through a flow tube to intercept a composite magnetic field to induce therein a voltage which is picked up by capacitive metering electrodes. The composite field is formed ... | 09/04/1990 |
| 4879450 | Laser welding technique A laser welding technique for joining two parts together, the parts having contacting faces which define an interfacial region. One part is permeable to a laser beam directed toward and focused on the interfacial region, the face of the other part having ... | 11/07/1989 |
| 4868797 | Time-shared AGC for ultra-sound liquid level meter An ultrasonic, echo-ranging instrument for measuring liquid level, the instrument including a transducer dispoed at a fixed position directly above the liquid surface. The transducer is excited to emit periodic pulses which are intercepted by the liquid s... | 09/19/1989 |
| 4852409 | Signal recovery system for mass flowmeter A mass flowmeter of the Coriolis-type having a primary wherein fluid being metered is conducted through a flow tube in the form of a double loop whose loops are excited by a driver to vibrate in phase opposition at the resonance frequency of the tuning fo... | 08/01/1989 |
| 4829826 | Differential-pressure transducer A differential pressure transducer of the capacitive type responsive to fluid pressure. The transducer includes a cylindrical body having insulating sections at either end provided with a planar end face and a concave cavity surrounded by an annular rim. ... | 05/16/1989 |
| 4821569 | Parasitic echo pulse rejector for ultrasonic liquid level meter An ultrasonic echo-ranging meter for measuring the changing level of liquid in a tank or open channel, the meter including a transducer at a raised position above the liquid surface. Pulses of ultrasonic energy transmitted by the transducer are directed t... | 04/18/1989 |
| 4814968 | Self-tuning process controller An industrial process control system in which an electronic controller acts in a controlled process subject to process "dead time" to maintain a process variable at a desired value. Applied as inputs to the controller are signals representing the process ... | 03/21/1989 |
| 4803474 | Cursor control matrix for computer graphics Computer graphics for an industrial process installation or other computer-controlled system in which the system is graphically displayed on the screen of the computer terminal. Each controllable element in the system, such as a valve, a control dial or a... | 02/07/1989 |
| 4794372 | Two-wire DC signal telemetering system A telemetering system wherein a transmitting device responsive to an input signal derived from a sensor representing a metered variable, such as temperature or flow rate, is adapted to generate a corresponding direct-current signal. This signal is conveye... | 12/27/1988 |
| 4788646 | Frequency-to-digital value converter A converter for converting a variable data frequency which lies in a low frequency range whose upper limit is about 200 Hz to a corresponding digital value. The converter includes an electronic counter having an enabling input and a count input. Derived f... | 11/29/1988 |
| 4785672 | Printed circuit capacitance electrodes A magnetic flowmeter in which a fluid to be metered is conducted through a ceramic spool coaxially supported within a cylinder casing to define an inner chamber. Mounted within the chamber at opposing positions on a magnet axis perpendicular to the longit... | 11/22/1988 |
| 4774844 | Encapsulated electromagnetic flowmeter An electromagnetic flowmeter having a frame assembly formed by an octagonal metal frame within which are mounted a pair of electromagnets and a pair of electrode holders. The electromagnets are secured to one set of opposing sides of the frame along a fir... | 10/04/1988 |
| 4766770 | Low duty cycle electromagnetic flowmeter An electromagnetic flowmeter in which the fluid being metered is conducted through a flow tube having a pair of electrodes, the fluid intersecting a magnetic field whereby the resultant voltage induced in the fluid is transferred to the electrodes to prov... | 08/30/1988 |
| 4756197 | Coriolis-type mass flowmeter A mass flowmeter of the Coriolis-type in which the fluid to be metered is conducted through a loop supported on a stationary frame, the loop having a natural resonance frequency. Mounted at the vertex of the loop is a ballistic vibrator which is electrica... | 07/12/1988 |
| 4754365 | Differential pressure transducer A differential pressure-transducer of the capacitive type that includes a drum-shaped insulating body whose flat opposing faces each have a circular back-up nest indented therein covered by an insulating diaphragm to define a cavity. The underside of each... | 06/28/1988 |
| 4747312 | Double-loop Coriolis type mass flowmeter A mass flowmeter of the Coriolis type in which the fluid to be metered is conducted through a pipe which is coiled to form a double loop. The pipe is anchored at its inlet and outlet ends and also at its center which is the junction of the two loops to de... | 05/31/1988 |
| 4745543 | Front panel for a process controller A front display panel for an industrial process control instrument which acts to maintain a process variable, such as flow rate, at a desired value. The instrument compares a signal representing the variable with an adjustable set point to produce an outp... | 05/17/1988 |
| 4727755 | Electromagnetic flowmeter with alternating permanent magnet field An electromagnetic flowmeter in which the fluid being metered is conducted through a flow tube having a pair of electrodes, the fluid intersecting a magnetic field whereby the resultant voltage induced in the fluid is transferred to the electrodes to prov... | 03/01/1988 |
| 4727473 | Self-learning mechanism for a set of nested computer graphics A set of nested graphics for a computer-controlled industrial plant or any other complex system having several interrelated sections. The nested set includes a graphic having entry points thereon each providing access to respective other graphics in the s... | 02/23/1988 |
| 4704907 | Electromagnetic flowmeter with triangular flux drive An electromagnetic flowmeter in which the fluid being metered passes through a flow tube to intersect the lines of flux of a magnetic field produced by an electromagnet whereby the resultant voltage induced in the fluid is transferred to a pair of electro... | 11/10/1987 |
| 4691578 | Coriolis-type mass flowmeter A mass flowmeter of the Coriolis-type in which the fluid to be metered is conducted through a loop supported on a stationary frame, the loop having a natural resonance frequency. Mounted at the vertex of the loop is a ballistic vibrator which is electrica... | 09/08/1987 |
| 4658652 | Electromagnetic flowmeter with capacitance type electrodes A magnetic flowmeter which includes a spool formed by a metallizable ceramic whose dielectric constant is at least 25 through which the fluid to be metered is conducted. The outer surface of the spool is metallized in its central region to define a pair o... | 04/21/1987 |
| 4651027 | Current-to-frequency converter An analog current-to-frequency converter which produces output pulses whose repetition rate depends on the current value. Included in the converter is an operational amplifier having an inverting input to which is applied a negative input voltage whose ma... | 03/17/1987 |
| 4631969 | Capacitance-type electrode assemblies for electromagnetic flowmeter An electromagnetic flowmeter for metering the flow rates of fluids of low conductivity, the flowmeter including a non-magnetic spool within which is disposed a pair of electrode assemblies at diametrically-opposed positions embedded with an insulating lay... | 12/30/1986 |
| 4592886 | Technique for stabilizing injection molded flowmeter liner A technique for stabilizing an insulating liner formed of thermoplastic material which is injection molded onto the inner surface of a metal spool having a cylindrical body provided with end flanges, an annular gap being created between the liner and the ... | 06/03/1986 |
| 4581121 | Free chlorine gas analyzer A free chlorine analyzer including a probe immersible in chlorinated water having oxygen dissolved therein, the analyzer being adapted to continuously and accurately measure the concentration of free chlorine in the water without regard to its oxygen cont... | 04/08/1986 |
| 4578997 | Time-shaped AGC for ultrasonic liquid level meter of the echo-ranging type An ultrasonic, echo-ranging instrument for measuring the level of liquid in an open channel or tank. The instrument includes a transducer disposed at a fixed position directly above the liquid surface, the nature of the gaseous environment therebetween de... | 04/01/1986 |
