Patents by Inventor Lloyd D. Clark

Lloyd D. Clark 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).

  • Patent number: 11803102
    Abstract: An illumination system for photography comprises at least a normally unlit pulsed light source (PLS) (112) with first and second electrical conduits (108, 110), a normally lit continuous light source (CLS) (300) with first and second electrical conduits (308, 310), and a hot shoe (104) with first and second electrical conduits, that is connected to a camera (100). The first conduits of all three components (112, 300, 100) are electrically connected together and the second conduits of all three components (112, 300, 100) are separately electrically connected together. When camera (100) is actuated, a switch closure from camera (100) actuates continuous light source (300), causing it to cease emitting light, and also actuates pulsed light source (112), causing it to briefly emit light, whereby both sources emit light at different times, thereby providing focus lighting while preventing light interference by CLS (300) during exposure of a subject by PLS (112).
    Type: Grant
    Filed: May 27, 2023
    Date of Patent: October 31, 2023
    Inventor: Lloyd D Clark
  • Patent number: 7787525
    Abstract: A wireline telemetry system and method of transmitting data on multiple carrier frequencies. The system and method adjust power level and number of bits-per-carrier to optimally or near-optimally utilize the capacity of the wireline cable. Due to the nature of wireline telemetry the overall power level is restricted only by the output capability of the downhole telemetry cartridge and the input power restrictions of the uphole telemetry unit receiver. The optimal power level is determined during a training sequence and is a function of such factors as cable length, cable material, cable temperature and cable geometry. The uplink and downlink transmission are executed using different modulation techniques.
    Type: Grant
    Filed: December 24, 1999
    Date of Patent: August 31, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Lloyd D. Clark, Jr., Joseph M. Steiner, Jr., Suzanne D. Richardson, Ramon Hernandez-Marti, Terry L. Mayhugh, Bart J. Bombay, John A. Booker, Gilbert R. Martinez
  • Patent number: 6999517
    Abstract: A digital telemetry system having improved data rate and robustness. The telemetry system has a data transmission cable having a first end and a second end, and is capable of transmitting data between the first and second end on at least two propagation modes. A data source connected at the first end has data transmission circuitry to generate data signals on these propagation modes. A receiver connected to the second end of the wireline cable has a first receive circuitry to receive signals on a first of the at least two propagation modes and a second receive circuitry to receive signals on a second of the at least two propagation modes. An adaptive far-end cross-talk cancellation circuitry connected to the first receive circuitry and to the second receive circuitry cancels out far-end cross-talk between the at least two propagation modes.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: February 14, 2006
    Assignee: Sehlumberger Technology Corporation
    Inventors: Bart J. Bombay, Lloyd D. Clark, Jr.
  • Patent number: 5736936
    Abstract: A method and apparatus for predicting the peak voltage at the load end of a power transmission cable having a power supply end and a load end, where direct measurement at the load end is not practical. The method samples the current and voltage waveforms at the power supply end of the cable. The current waveform is used to estimate a current function which includes a full width at half maximum and adjustments for cable reactive current, distortions, and load. The product of the current function and a peak voltage sample from the power supply end is an estimate of the peak voltage at the load end. The method and apparatus have been applied to oil well logging where one or more logging tools are lowered at the end of a transmission cable into an oil well and it is desirable to predict peak voltage at the tools to ensure proper tool performance. An important improvement is a more accurate current function which compensates for capacitive current flow in the cable and includes a quadratic term.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: April 7, 1998
    Assignee: Schlumberger Technology Corporation
    Inventors: Bart J. Bombay, Marvin W. Rasmussen, Lloyd D. Clark, Jr., Terry L. Mayhugh, Terry L. Mayhugh, Jr., Jimmy E. Neeley, Guy Vachon
  • Patent number: 5623715
    Abstract: An hydraulic cylinder (100) driven by a reciprocating motive force operates in conjunction with two check valves (170) and (200) to pump liquid toner concentrate (150) around a loop from a reservoir bottle (180) and back into the bottle (180). A microprocessor circuit (230) analyzes commands and data bytes representative of the number and color of pixels transmitted from a computer (290) to an electrographic printer (280). When a predetermined pixel count has been reached, a microprocessor circuit (230), acting on positional information obtained from an optical sensor (240) and marks (250) and (260) on a wheel (160), causes a previously calculated volume of concentrate (150) to be added to a toner premix stream or reservoir in printer (280), thus replacing toner particles depleted from toner premix in the printer (280) during printing. The wheel (160) can run continuously to provide a stirring action for the concentrate (150).
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: April 22, 1997
    Inventor: Lloyd D. Clark
  • Patent number: 5483232
    Abstract: A method and apparatus for predicting the peak voltage at the load end of a power transmission cable having a power supply end and a load end, where direct measurement at the load end is not practical. The method samples the current and voltage waveforms at the power supply end of the cable. The current waveform is used to estimate a current function which includes a full width at half maximum approximation adjusted as required for load, cable type, and cable length. The product of the current function and a peak voltage sample from the power supply end is an estimate of the peak voltage at the load end. The method and apparatus have been applied to oil well logging where one or more logging tools are lowered at the end of a transmission cable into an oil well and it is desirable to predict peak voltage at the tools to ensure proper tool performance.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: January 9, 1996
    Assignee: Schlumberger Technology Corporation
    Inventors: Lloyd D. Clark, Jr., Terry L. Mayhugh, Terry L. Mayhugh, Jr., Jimmy E. Neeley, Guy Vachon
  • Patent number: 5116464
    Abstract: An aqueous solution of cesium hydroxide serves as a highly selective anisotropic etch for semiconductor crystals including silicon. The cesium hydroxide also has a high etch selectivity for tantalum with respect to semiconductor crystals.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: May 26, 1992
    Assignee: Massachusetts Institute of Technology
    Inventors: David J. Edell, Lloyd D. Clark, Jr.
  • Patent number: 4831527
    Abstract: The fat-to-lean ratio of tissue on a human subject is measured by the subject standing on a platform (100), raising his or her heels, then allowing his or her weight to fall onto the board near a transducer to produce a force. A sensor transmits a voltage signal to an analog-to-digital (A/D) converter. The subject's stomach (300), buttocks (310), and other flesh will continue moving in a downward direction (335) (below their rest position) after the skeleton has stopped moving. This results in a downward force on the board which is registered as a data peak (580) in a computer through the action of the sensor and the A/D converter. Tissue elasticity will cause the stomach and buttocks to then move upward (350), above their normal resting position. This will result in a lessening of the force and a corresponding minimum (590) in the output wave.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: May 16, 1989
    Inventor: Lloyd D. Clark
  • Patent number: 4752919
    Abstract: The time of day is displayed on clock face (10) through the use of two, two-digit numerical stations (20) and (30) and a minutes scale comprised of marks (40). The left-hand station (20) indicates the actual hour of the day and the right-hand station (30) indicates the next hour of the day so that display (30) always indicates one hour past the time shown by display (20). A series of lamps (40) between the two stations are used to form a bar-graph display of the minutes of the hour. A number of display modalities are possible. Electronic and mechanical versions of the timepiece are shown.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: June 21, 1988
    Inventor: Lloyd D. Clark
  • Patent number: 4600280
    Abstract: Sound is recorded on a motion picture filmstrip (20) by taking periodic samples (15) of an analog signal (13), digitizing each sample in the form of a sixteen-bit binary word (40), (41), (43), and representing each binary word on the filmstrip in the form of a group of bits (8) composed of black dots (26) and transparent spaces (28). Each dot represents a binary ZERO and each space a binary ONE. The groups of binary bits are disposed in a digitized soundtrack (8) on the filmstrip, between the visual frames (50) and the sprocket holes (54), either in lieu of or in addition to the regular analog "variable area" soundtrack (48). On the digitized soundtrack, the groups of bits are arranged in parallel rows (42) which are oriented orthogonally to the direction of elongation of the filmstrip. Each row consists of a group of starting bits (44), followed by three groups of binary bits, for the left (40), right (41) and center ( 43) audio tracks, respectively.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: July 15, 1986
    Inventor: Lloyd D. Clark
  • Patent number: 4591885
    Abstract: An ionographic copier based upon the fluid jet assisted ion projection electrographic marking process. A light sensitive ion modulation assembly is used for controlling the flow of ions in accordance with dark and light patterns of raster line optical information projected from an original to be copied.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: May 27, 1986
    Assignee: Xerox Corporation
    Inventors: Gene F. Day, Lloyd D. Clark
  • Patent number: 4521792
    Abstract: An improved ion projection printing apparatus, for imaging on the front surface of a charge receptor sheet with an imagewise charging device and for depositing a counter-charge upon the rear surface of the charge receptor sheet with another charging device located downstream of the imagewise charging device.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: June 4, 1985
    Assignee: Xerox Corporation
    Inventors: Lloyd D. Clark, Jean K. Wilcox, Gene F. Day
  • Patent number: 4444515
    Abstract: An earring watch comprises an enclosure 4 with a friction clip or pierced-earlobe hook for attachment to the ear. The enclosure contains an energy cell 18, a timekeeping circuit 42-46-48 and an audio transducer 40 for announcing the time in a series of groups of tones, the number of tones in each group equal to a respective digit of the time. The time is announced when the wearer touches one part of the surface of the enclosure twice, another part 6 of the enclosure is electrically connected to the body via the ear, so that the touch completes a circuit between the two parts of the enclosure. Preferably, and to avoid false readouts due to an inadvertent touch, the watch contains circuitry for providing a time readout only if it is touched twice within a predetermined interval.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: April 24, 1984
    Inventor: Lloyd D. Clark
  • Patent number: 4420102
    Abstract: A napkin ring which easily and quickly imparts a decorative shape to a napkin inserted therein comprises an annular-shaped external member 2 having a cantilevered tongue 4 extending from an inside surface of said external member toward and past the center of the annulus. The free end of the tongue has a pair of arms 16 extending therefrom and curved back toward the base of the tongue. A napkin is shaped by inserting a corner thereof 8 between the free end of the tongue and the annulus and pulling the napkin about halfway into the ring where it will be forced into a decorative shape between the tongue and the ring.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: December 13, 1983
    Inventor: Lloyd D. Clark
  • Patent number: 4413630
    Abstract: Improvements are disclosed in an ultrasonic display and recording system of the type utilized in diagnostic medicine with particular applicability in cardiovascular diagnosis. The system includes a multi-element transducer for generating and receiving ultrasonic energy which is propagated into and reflected back from the cardiovascular region of the patient being examined, and also includes means for generating a two-dimensional real time display and/or image of the zone of examination. TM recording means are associated with the system and may be actuated to effect a TM recording corresponding to a preselected region of the real time image being observed. An ECG output signal is also displayed in real time with the two-dimensional image, and photographs of the displays may be produced at selected points in the ECG cycle in accordance with a setting made by the system operator.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: November 8, 1983
    Assignee: Diasonics Cardio/Imaging, Inc.
    Inventors: Weston A. Anderson, Lloyd D. Clark, William L. Beaver
  • Patent number: 4378596
    Abstract: In a receiver for pulsed ultrasonic beams, it is sometimes desirable to translate the received signal to a lower carrier frequency by a heterodyne process. It is also often desirable to vary the receiving channels' gain during the period when signals are being received from a single transmitted pulse, to compensate for the attenuation of later-arriving signals from a greater distance. To get both the heterodyne and the time-gain control functions in a prior-art receiver of N channels requires 2 mixers in each channel, or 2N mixers. According to the invention, the heterodyne and the time-gain control signals are combined in one master mixer and fed to all the channel mixers. The only N+1 mixers are required.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: March 29, 1983
    Assignee: Diasonics Cardio/Imaging, Inc.
    Inventor: Lloyd D. Clark
  • Patent number: 4274422
    Abstract: Improvements are disclosed in an ultrasonic display and recording system of the type utilized in diagnostic medicine with particular applicability in cardiovascular diagnosis. The system includes a multi-element transducer for generating and receiving ultrasonic energy which is propagated into and reflected back from the cardiovascular region of the patient being examined, and also includes means for generating a two-dimensional real time display and/or image of the zone of examination. TM recording means are associated with the system and may be actuated to effect a TM recording corresponding to a preselected region of the real time image being observed. An ECG output signal is also displayed in real time with the two-dimensional image, and photographs of the displays may be produced at selected points in the ECG cycle in accordance with a setting made by the system operator.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: June 23, 1981
    Assignee: Varian Associates, Inc.
    Inventors: Weston A. Anderson, Lloyd D. Clark, William L. Beaver
  • Patent number: 4205483
    Abstract: A device in which a displaced member will automatically return to its rest position after a delay comprises a container partially filled with a viscous fluid. The container is mounted so that it can be moved between a first, stable (rest) position and a second, semistable position in which the fluid will flow slowly away from its rest position. When the fluid has moved away from its rest position sufficiently, it will cause the center of gravity of the container to shift to one side of a pivot, whereupon the container will make an automatically delayed return to its first position. The container is employed as a box lid which will close automatically a predetermined time after being opened so that it can be used as an interval timer and/or a scent release mechanism. The container is also mounted in a human novelty figure in such a manner that if it is tipped over it will return automatically to an upright position after a predetermined delay.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: June 3, 1980
    Inventors: Lloyd D. Clark, David Pressman
  • Patent number: 4185283
    Abstract: A multiple-character-word indication system employs a humanly sensible output in which plural associated characters which constitute a word representing time, temperature, or other information are indicated sequentially through the use of sensible (audible, palpable, visible) indicia in coded form. The words are generated in electronic form by known means. Individual characters are sequentially selected and then supplied to electronic circuitry which generates a code of sequential signals corresponding to the character. This code is then applied to one or more transducers which convert the signals to the sensible indicia. The output indication can be initiated either periodically or upon demand. The readout transducer preferably produces plural types of sensible sensations, such as tones of different pitch, to distinguish the respective characters of the word. In a preferred embodiment the system is a clock which indicates different digits of the time of day by sequential coded tones.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: January 22, 1980
    Inventor: Lloyd D. Clark
  • Patent number: D344974
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: March 8, 1994
    Assignee: Amoco Corporation
    Inventors: Lloyd D. Clark, William T. Davids, George D. Rehklau