Patents by Inventor Tzafrir Sheffer
Tzafrir Sheffer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11104421Abstract: A device for releasably mounting an autopilot control circuit to a flight control component of an aircraft, includes a frame that holds a component of an autopilot control circuit; a first coupler releasably fastened to the frame and operable to releasably mount the frame to the airframe of an aircraft; and a second coupler releasably fastened to the frame and operable to releasably mount the frame to a flight control component of the aircraft. When the device is releasably mounted in an aircraft's cabin and the autopilot control circuit is engaged, the autopilot control circuit controls an aspect of the aircraft's flight by moving the second coupler relative to the first coupler. With the device one can releasably mount an autopilot control circuit to an aircraft that does not have one and use the autopilot control circuit and device to control one or more aspects of the aircraft's flight. Then, after the flight is finished, one can remove the device and autopilot control circuit for use in another aircraft.Type: GrantFiled: January 29, 2020Date of Patent: August 31, 2021Inventors: Tzafrir Sheffer, Yarden Sheffer
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Publication number: 20200317326Abstract: A device for releasably mounting an autopilot control circuit to a flight control component of an aircraft, includes a frame that holds a component of an autopilot control circuit; a first coupler releasably fastened to the frame and operable to releasably mount the frame to the airframe of an aircraft; and a second coupler releasably fastened to the frame and operable to releasably mount the frame to a flight control component of the aircraft. When the device is releasably mounted in an aircraft's cabin and the autopilot control circuit is engaged, the autopilot control circuit controls an aspect of the aircraft's flight by moving the second coupler relative to the first coupler. With the device one can releasably mount an autopilot control circuit to an aircraft that does not have one and use the autopilot control circuit and device to control one or more aspects of the aircraft's flight. Then, after the flight is finished, one can remove the device and autopilot control circuit for use in another aircraft.Type: ApplicationFiled: January 29, 2020Publication date: October 8, 2020Inventors: Tzafrir Sheffer, Yarden Sheffer
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Patent number: 10589845Abstract: A device for releasably mounting an autopilot control circuit to a flight control component of an aircraft, includes a frame that holds a component of an autopilot control circuit; a first coupler releasably fastened to the frame and operable to releasably mount the frame to the airframe of an aircraft; and a second coupler releasably fastened to the frame and operable to releasably mount the frame to a flight control component of the aircraft. When the device is releasably mounted in an aircraft's cabin and the autopilot control circuit is engaged, the autopilot control circuit controls an aspect of the aircraft's flight by moving the second coupler relative to the first coupler. With the device one can releasably mount an autopilot control circuit to an aircraft that does not have one and use the autopilot control circuit and device to control one or more aspects of the aircraft's flight.Type: GrantFiled: October 14, 2015Date of Patent: March 17, 2020Inventors: Tzafrir Sheffer, Yarden Sheffer
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Publication number: 20170313408Abstract: A device for releasably mounting an autopilot control circuit to a flight control component of an aircraft, includes a frame that holds a component of an autopilot control circuit; a first coupler releasably fastened to the frame and operable to releasably mount the frame to the airframe of an aircraft; and a second coupler releasably fastened to the frame and operable to releasably mount the frame to a flight control component of the aircraft. When the device is releasably mounted in an aircraft's cabin and the autopilot control circuit is engaged, the autopilot control circuit controls an aspect of the aircraft's flight by moving the second coupler relative to the first coupler. With the device one can releasably mount an autopilot control circuit to an aircraft that does not have one and use the autopilot control circuit and device to control one or more aspects of the aircraft's flight.Type: ApplicationFiled: October 14, 2015Publication date: November 2, 2017Inventors: Tzafrir Sheffer, Yarden Sheffer
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Patent number: 5629628Abstract: An instrument and method for the troubleshooting and verification of copper-wire local area network (LAN) cable systems provides a series of resistance and capacitance measurements between all possible wire pairs using a pair of switch matrices and a software method for evaluating the measurements which are stored in a two-dimensional matrix. The stored measurements are evaluated against predetermined figures of merit and the decision pattern in matrix form is compared to that of a known good LAN cable system. Error messages responsive to mismatches are generated and presented to the operator via a user interface. Near-end cross talk (NEXT) isolation is evaluated using a mathematically calculated differential capacitance technique. Error messages are generated responsive to difference capacitance values larger than a figure of merit correlated to an acceptable level of NEXT isolation.Type: GrantFiled: May 23, 1996Date of Patent: May 13, 1997Assignee: Fluke CorporationInventors: Mark E. Hinds, Robert J. Lewandowski, Thomas P. Locke, Tzafrir Sheffer
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Patent number: 5559427Abstract: An instrument and method for the troubleshooting and verification of copper-wire local area network (LAN) cable systems provides a series of resistance and capacitance measurements between all possible wire pairs using a pair of switch matrices and a software method for evaluating the measurements which are stored in a two-dimensional matrix. The stored measurements are evaluated against predetermined figures of merit and the decision pattern in matrix form is compared to that of a known good LAN cable system. Error messages responsive to mismatches are generated and presented to the operator via a user interface. Near-end cross talk (NEXT) isolation is evaluated using a mathematically calculated differential capacitance technique. Error messages are generated responsive to difference capacitance values larger than a figure of merit correlated to an acceptable level of NEXT isolation.Type: GrantFiled: April 4, 1994Date of Patent: September 24, 1996Assignee: Fluke CorporationInventors: Mark E. Hinds, Robert J. Lewandowski, Thomas P. Locke, Tzafrir Sheffer
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Patent number: 5436555Abstract: A LAN cable identifier for testing and identifying copper-conductor LAN cables in conjunction with a LAN cable test instrument is provided. Series combinations of resistors and diodes allow for both resistance measurements and polarity determinations for selected pairs of conductors of the LAN cable. Resistance values are chosen to allow for identification of each combination in order to diagnose wiring errors and to identify the particular LAN cable identifier. In addition, capacitance measurements are accommodated with minimal contribution to measurement error by careful orientation of the resistors and diodes so that the diodes may be reverse biased by a d.c. bias voltage provided by the LAN cable test instrument. The reverse biased diode junctions contribute only a small amount of shunt capacitance to the measurement.Type: GrantFiled: June 9, 1994Date of Patent: July 25, 1995Assignee: Fluke CorporationInventors: Thomas P. Locke, Tzafrir Sheffer
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Patent number: 5045817Abstract: In a direct digital synthesizer providing a frequency modulated output the modulation input is bit shifted and the rate of the direct digital synthesizer phase accumulation is controlled to provide enhanced FM deviation resolution.Type: GrantFiled: September 7, 1990Date of Patent: September 3, 1991Assignee: John Fluke Mfg. Co., Inc.Inventor: Tzafrir Sheffer
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Patent number: 4998072Abstract: The frequency resolution of a direct digital synthesizer is increased by varying the phase increment used to accumulate wave lookup table addresses between two integer values. The time periods during which the larger integer value is employed is proportional to a fractional part of the desired phase increment for providing an analog output at a selected frequency.Type: GrantFiled: February 20, 1990Date of Patent: March 5, 1991Assignee: John Fluke Mfg. Co., Inc.Inventor: Tzafrir Sheffer
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Patent number: 4992743Abstract: Arrangements are provided for generation of dual-tone waveforms utilizing direct digital waveform synthesis techniques and architecture and retaining the advantageous characteristics of direct digital waveform synthesis. Preferred embodiments feature combination of generated waveforms at an analog adder, a digital adder using a single digital-to-analog converter and at a single wave table, respectively, each providing particular hardware economies and operational advantages with respect to other preferred embodiments.Type: GrantFiled: November 15, 1989Date of Patent: February 12, 1991Assignee: John Fluke Mfg. Co., Inc.Inventor: Tzafrir Sheffer
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Patent number: 4951004Abstract: A coherent direct digital waveform synthesizer, capable of generating a waveform in response to a decimally or other non-binary related reference frequency while obtaining the advantages of the use of a binary radix phase accumulator generating binary addresses for a waveform memory. The interface between these elements include a frequency converter including a voltage controlled oscillator and a further binary radix phase accumulator in the feedback path of a phase locked loop. A binary radix related digital waveform synthesizer may be thus made to produce non-binary related frequency waveforms coherent with a non-binary radix reference frequency source, and of decimal or other non-binary radix related resolution.Type: GrantFiled: March 17, 1989Date of Patent: August 21, 1990Assignee: John Fluke Mfg. Co., Inc.Inventors: Tzafrir Sheffer, Eric Drucker
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Patent number: 4716361Abstract: An apparatus for performing ratiometric capacitance measurements by comparing the output of a digital-to-analog converter with the voltage at a tap between an unknown capacitance and a first inherent capacitance of the apparatus. A common input voltage is supplied to both the series circuit, including the first inherent and unknown capacitances, and to the digital-to-analog converter which accomplishes attenuation of the input voltage in response to a digital value. The digital value is generated by a successive approximation register supplying a digital output relating the unknown capacitance to the known capacitance. The apparatus is adapted to ratiometrically measure the first inherent capacitance by supplying the common input voltage to a series circuit, including a known reference capacitance and the first inherent capacitance, such that the digital output of the successive approximation register relates the first inherent capacitance to the reference capacitance.Type: GrantFiled: June 11, 1985Date of Patent: December 29, 1987Assignee: John Fluke Mfg. Co., Inc.Inventor: Tzafrir Sheffer