Stopping After Predetermined Number Of Reciprocations Or Cycles (including Single Cycle) Patents (Class 318/120)
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Patent number: 8963464Abstract: 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: GrantFiled: October 6, 2010Date of Patent: February 24, 2015Assignee: Robert Bosch GmbHInventors: Peter Braun, Norbert Wegner, Harald Retsch
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Publication number: 20140184109Abstract: 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: ApplicationFiled: March 6, 2014Publication date: July 3, 2014Applicant: Semiconductor Components Industries, LLCInventor: Tsutomu Murata
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Patent number: 8704585Abstract: 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: GrantFiled: December 22, 2011Date of Patent: April 22, 2014Assignee: Research Electronics Leksand ABInventor: Sven-Ake Eriksson
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Patent number: 7317291Abstract: 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: GrantFiled: October 24, 2006Date of Patent: January 8, 2008Assignee: Canon Kabushiki KaishaInventors: Akio Atsuta, Shinichi Yamashita
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Publication number: 20020006007Abstract: 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: ApplicationFiled: May 4, 2001Publication date: January 17, 2002Inventor: Mehran Ataee
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Patent number: 5939851Abstract: 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: GrantFiled: December 23, 1997Date of Patent: August 17, 1999Assignee: Canon Kabushiki KaishaInventors: Kenichi Kataoka, Shinji Yamamoto, Tadashi Hayashi
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Patent number: 5764018Abstract: 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: GrantFiled: September 29, 1995Date of Patent: June 9, 1998Assignee: Hewlett-Packard Co.Inventors: Steven F. Liepe, Kenneth G. Richardson
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Patent number: 5600214Abstract: 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: GrantFiled: November 21, 1995Date of Patent: February 4, 1997Assignee: Maxwell Products, Inc.Inventor: Leonard E. Fromson
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Patent number: 4535760Abstract: 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: GrantFiled: January 28, 1983Date of Patent: August 20, 1985Assignee: Matsushita Electric Works, Ltd.Inventors: Shigayuki Ikeda, Takafumi Hamabe
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Patent number: 4259653Abstract: 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: GrantFiled: November 22, 1977Date of Patent: March 31, 1981Assignee: Magnetic Laboratories, Inc.Inventor: James J. McGonigal
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Patent number: 4117381Abstract: 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: GrantFiled: August 24, 1977Date of Patent: September 26, 1978Assignee: Stanley TruxellInventor: Franklin C. Pereny
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Patent number: 4091317Abstract: 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: GrantFiled: September 23, 1976Date of Patent: May 23, 1978Assignee: Sunbeam CorporationInventors: Leon M. Roszyk, H. William Mammen, John B. Buchner