Stopping After Predetermined Number Of Reciprocations Or Cycles (including Single Cycle) Patents (Class 318/120)
  • Patent number: 8963464
    Abstract: The invention relates to a control device (160) for a drive unit (120) of a vehicle windshield wiper system (100) comprising at least one wiper arm (140). The control device (160) is designed to determine a load quantity (L) of the drive unit (120) and to set the wiping frequency (WH) of the wiper arm (140) on the basis of the ratio of the load quantity (L) to at least one load threshold value (LS). Furthermore, the control device (160) is designed to set the wiping frequency (WH) depending on the current speed (v) of the vehicle.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: February 24, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Peter Braun, Norbert Wegner, Harald Retsch
  • Publication number: 20140184109
    Abstract: A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase.
    Type: Application
    Filed: March 6, 2014
    Publication date: July 3, 2014
    Applicant: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8704585
    Abstract: A method for driving a field effect transistor for shaping an electrical signal, representing a sound, to an output signal is disclosed. The method comprises modifying the input signal to an intermediate signal, and output of the intermediate signal to the field effect transistor for shaping the output signal. The method comprises the steps of adjusting the quiescent point of the field effect transistor such that the same is placed in the quadratic region of the transfer characteristics of the field effect transistors, and adjusting the amplitude of the intermediate signal, such that the same causes the potential swing between the gate terminal and the source terminal to at least partly be in the quadratic region of the transfer characteristics of the field effect transistor.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 22, 2014
    Assignee: Research Electronics Leksand AB
    Inventor: Sven-Ake Eriksson
  • Patent number: 7317291
    Abstract: A frequency control circuit including a control circuit for setting a set value, an adding circuit for adding the set value per unit time and effecting counting based on the adding result, and a signal output circuit for outputting an alternating signal of a cycle corresponding to the time necessary for the count result by the adding circuit to reach a target value. The control circuit sets the set value as a value which does not correspond to a submultiple of the target value, and the adding circuit starts the counting of a next cycle when the count result reaches the target value. The control circuit further sets an initial value of the counting of the next cycle in accordance with a value of a portion of the adding results, exceeding the target value when the count result reaches the target value.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: January 8, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akio Atsuta, Shinichi Yamashita
  • Publication number: 20020006007
    Abstract: An apparatus for parking a read/write head during power interruptions and methods of operating the same result in a hard disk drive apparatus that reduces the time to steady state the operating hard disk drive. The apparatus for reducing the time to steady state the operating disk drive having an actuator arm coupled to a voice coil for latching the actuator arm when power is interrupted comprises a Y-winding spindle motor having a first winding, a second winding, and a third-winding, and a spindle motor controller coupled to the Y-winding spindle motor configured to dynamically short the first winding and the second windings to produce a retarding force against the Y-winding motor and to direct power produced by the third winding in series with the first two windings in parallel to the voice coil for moving the actuator arm to a latched position and to maintain sufficient power to the spindle motor to provide greater operating range (headroom).
    Type: Application
    Filed: May 4, 2001
    Publication date: January 17, 2002
    Inventor: Mehran Ataee
  • Patent number: 5939851
    Abstract: A position control device for driving a movable member by a motor to a target position prevents a re-start of the motor by the vibration after stopping of the movable member. A re-start operation is forcedly inhibited during a predetermined period after a stopping operation of the movable member at the target position, and is permitted, only after the predetermined period, is entered by the position of the movable member is different from the target position.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: August 17, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenichi Kataoka, Shinji Yamamoto, Tadashi Hayashi
  • Patent number: 5764018
    Abstract: A system and method for reducing non-repeatable positioning errors. Non-repeatable positioning errors caused by the effects stiction and backlash in the mechanical system are reduced by "shaking" or vibrating the positioning system in a controlled manner. After the system input is set to the desired value, the positioning system is "shaken" by inputting a series of offsets that oscillate around the desired location and gradually decrease in amplitude, eventually reaching zero. In a specific embodiment, a lead screw is threaded through a follower nut which is connected to a magnetic tape read/write head. The lead screw is rotated by a mechanical transmission which provides gear reduction from a computer controlled stepper motor. The tape head's non-repeatable positioning error is reduced by alternately stepping the stepper motor in opposite directions a specified number of steps and periodically reducing the specified number of steps until zero is eventually reached.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: June 9, 1998
    Assignee: Hewlett-Packard Co.
    Inventors: Steven F. Liepe, Kenneth G. Richardson
  • Patent number: 5600214
    Abstract: In an articulated bed having a motor for raising and lowering the bed, a control circuit operated by the user has first user memory for storing a first user variable indicating a user-selected first preferred bed position and a recall button by which the user can command that a handler routine in the control circuit return the bed to the first preferred bed position indicated by the first user variable. Further, the control circuit can have a tracking memory for frequently storing a tracking variable indicating the current position of the bed and a "store" or "program" button or control by which the user can command that the first user variable be set to equal the current tracking variable. Thus, any time the bed is a position preferred by the user, the user can push the store button to store a user variable indicating the preferred bed position in the controller's memory; then afterwards the user can have the bed return to that preferred position by pressing the recall button.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: February 4, 1997
    Assignee: Maxwell Products, Inc.
    Inventor: Leonard E. Fromson
  • Patent number: 4535760
    Abstract: A vibratory massage apparatus comprises a treatment portion elastically carried on a support, a vibration generator including an electric motor for providing vibrations to the treatment portion, and a control circuit connected to the motor for causing vibratory amplitude of the motor to be varied, whereby a variety of vibratory stimulation can be imparted to the user's affected part placed on the treatment portion of the apparatus with an excellent massaging effect.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: August 20, 1985
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Shigayuki Ikeda, Takafumi Hamabe
  • Patent number: 4259653
    Abstract: A spring-less linear actuator, especially useful as a print wire drive. A permanent magnet armature is driven from a rest position on a pole piece by magnetic repulsion upon energization of a solenoid by a D.C. pulse. The armature is fixed to a print wire which rebounds from a printing medium, thereby returning the permanent magnet toward the rest position, where it is held, without bouncing, by the magnetic attraction between the armature and the pole piece of the solenoid, which is now de-energized.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: March 31, 1981
    Assignee: Magnetic Laboratories, Inc.
    Inventor: James J. McGonigal
  • Patent number: 4117381
    Abstract: A base yieldably supporting a frame, on which an electromagnetic assembly is mounted, is fixedly secured to a more massive body to which an armature is elastically connected by coupling springs. Limit switches control initiation and termination of a timer controlled cycle during which the electromagnetic assembly is energized to cause advancement of the armature under magnetic attraction followed in sequence by acceleration of the massive body and the frame under the urge of the elastically deformed springs.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: September 26, 1978
    Assignee: Stanley Truxell
    Inventor: Franklin C. Pereny
  • Patent number: 4091317
    Abstract: A variable delay windshield wiper control system is provided in conjunction with a conventional windshield wiper system of an automobile to control the operation wiper drive source and wiper drive mechanism at predetermined variable intervals. The variable delay wiper control system operates independently of the conventional wiper switch and is effective to provide an adjustable delay interval between successive windshield wiper sweeps or reciprocative paths as is desirable during light rain or precipitation conditions.The wiper control system includes a timing circuit which generates variable duration intervals and directly effects operation of the drive source at the end of each of the intervals, and a delay control adjusted by the operator. A control switch is also provided for disabling the variable delay wiper control system and for effecting operation of the timing circuit.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: May 23, 1978
    Assignee: Sunbeam Corporation
    Inventors: Leon M. Roszyk, H. William Mammen, John B. Buchner