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Author

Tellerman Jacob

Bio: Tellerman Jacob is an academic researcher. The author has contributed to research in topics: Wiedemann effect & Displacement (orthopedic surgery). The author has an hindex of 3, co-authored 4 publications receiving 27 citations.

Papers
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Patent
02 Apr 1962

9 citations

Patent
20 Jul 1966

4 citations

Patent
13 Jan 1983
TL;DR: An ultrasonic waveguide (5) is used for coding magnetic keys (1 to 4) on a keyboard as discussed by the authors, which makes it possible to generate signals in a given time relation to an applied pulse which provides for coding by means of depressed keys.
Abstract: An ultrasonic waveguide (5) is used for coding magnetic keys (1 to 4) on a keyboard. The magnets (1, 2a, 3a, 4a and so forth) of the keys act with their respective magnetic fields on the ultrasonic waveguide (5) which makes it possible to generate signals in a given time relation to an applied pulse which provides for coding by means of depressed keys. Since the required information essentially appears on a wire, particularly a single wire, the system is fundamentally a very reliable solid-state system in which the entire basic-signal processing takes place in an "integral" ultrasonic waveguide component. Potential simplicity, construction at low cost and the very high reliability have the effect that the invention can be very suitably and advantageously used in keyboards for computers, data processing systems or equipment, teletype systems or equipment, computer user (home) terminals or time-sharing stations, computer-controlled booking stations, visual display consoles or desks etc.

1 citations


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PatentDOI
TL;DR: In this paper, a magnetostrictive transducer measuring system for precisely measuring the liquid level of fuel in an underground tank is described, where a current pulse is applied to the transducers and sonic pulses are simultaneously produced through the interaction of the magnetic field of transducers with the magnetic fields of the magnets.
Abstract: A magnetostrictive transducer measuring system for precisely measuring the liquid level of fuel in an underground tank. The system provides for the measurement of the position of one or more transducer magnets in a tube that are positioned along a length of the transducer wire therein, with one of the magnets fixed in the tube to provide a reference position. A current pulse is applied to the transducer wire and sonic pulses are simultaneously produced through the interaction of the magnetic field of the transducer wire and the fields of the magnets. The sonic pulses are detected by a sensor and the time interval between the detected sonic pulses is determined to determine the distance between the magnets.

49 citations

Patent
03 Apr 1989
TL;DR: In this article, a magnetostrictive wire is used to measure liquid level as a function of the elapsed time between an actuation signal and the first zero crossing of the voltage which is induced as the torsional strain passes through the area of influence of the sliding magnet.
Abstract: A liquid level detector of the type in which a magnetostrictive wire extends through the liquid level measurement range and is captured in a tensioned vertical orientation within a stainless steel tube. Liquid level is measured as a function of the time required for a torsional disturbance imparted the wire near the top to travel along the wire to a magnet which is contained within a liquid level float which slides up and down along the tube. The torsional disturbances imparted to the wire by means of a piezoelectric crystal to which the wire is easily clamped. Accuracy is enhanced by measuring liquid level as a function of the elapsed time between an actuation signal and the first zero crossing of the voltage which is induced as the torsional strain passes through the area of influence of the sliding magnet.

45 citations

Patent
08 Dec 1989
TL;DR: A magnetostrictive linear displacement detector with increased position resolution was proposed in this paper, where the displacement is determined from the interval of time between the detection of the torsional motion traveling directly from the magnet and the detection reflected from the reflection termination.
Abstract: A magnetostrictive linear displacement detector with increased position resolution includes a magnetostrictive wire anchored at opposite head and foot ends with a reflection termination at the foot end and a damping termination at the head end. A return wire is connected to the foot end of the magnetostrictive wire. The magnetostrictive wire is electrically excited at its head end. A variable position to be detected is represented by a magnet disposed for displacement along the magnetostrictive wire. A torsional motion sensor at the head end generates an electrical indication of the torsional motion within the magnetostrictive wire induced by passage of the electrical excitation by the position of the magnet. The displacement is determined from the interval of time between the detection of the torsional motion traveling directly from the magnet and the detection of the torsional motion reflected from the reflection termination. The reflection termination preferably consists of a brass cylindrical torus having a hole through which said magnetostrictive wire is passed and attached via a set screw. In an alternative embodiment the magnetostrictive wire is torsionally excited and the responses are detected electrically.

44 citations

Patent
19 Jun 1990
TL;DR: In this paper, a combined magnetostrictive linear displacement detector and a plural location temperature detector are used to produce a composite signal for transmission on a 2 wire transmission line, where the resistances of the temperature sensitive resistors as well as two reference resistors are measured in a predetermined sequence.
Abstract: The present invention is a combined magnetostrictive linear displacement detector and plural location temperature detector. The combined apparatus produces a composite signal for transmission on a 2 wire transmission line. The resistances of the temperature sensitive resistors as well as two reference resistors are measured in a predetermined sequence. The linear displacement is measured by the length of time required for a torsional strain to travel along the magnetostrictive wire to the position of the magnet. A pulse generator generates a predetermined number of pulses for each resistance measurement having pulse period corresponding to the measured resistance, with the minimum such pulse period preferably being greater than twice the maximum time required for a torsional strain to propagate the length of the magnetostrictive wire. An electrical signal is supplied to the transmission line when either said pulse generator generates a pulse or the induced electrical signal is detected. The time between the pairs of pulses indicates the linear displacement fixed by the magnet. The time between pulse pairs is a measure of one of the resistances. The combined apparatus of the present invention also periodically degausses the magneteostrictive wire at a time when no displacement measurement is taking place.

35 citations

Patent
08 Jul 1985
TL;DR: In this paper, a method of time domain noise rejection in a sonic transducer is disclosed in which all signal reception is prevented between application of a periodic electrical pulse and reception of the corresponding electrical signal.
Abstract: A method of time domain noise rejection in a sonic transducer is disclosed in which all signal reception is prevented between application of a periodic electrical pulse and reception of the corresponding electrical signal. An inhibit signal, produced for a substantial portion of the time interval between application of an electrical pulse and reception of the corresponding electrical return signal, blocks all noise that may occur to provide a false indication of a return electrical signal during the time of the inhibit signal.

34 citations