In Response To Movement Or Position (e.g., Limit Of Travel) Of Motor Or Driven Device Patents (Class 318/282)
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Patent number: 4491774Abstract: A radio-controlled door operator system includes a reversible AC motor and lamp. Power is supplied to the motor and lamp by a pair of power control relays each having two single-pole double-throw contacts. Actuation of one relay results in clockwise rotation of the motor and lighting of the lamp. Actuation of the other relay results in counter-clockwise rotation of the motor and lighting of the lamp. Actuation of both relays results in lighting of the lamp only. Three different active operating states are thus established by the two relays.Type: GrantFiled: December 30, 1983Date of Patent: January 1, 1985Assignee: Motorola, Inc.Inventor: Charles J. Schmitz
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Patent number: 4491775Abstract: A motor operated valve, typically a butterfly valve driven by a synchronous electric motor (16), is provided with a torque sensing arrangement wherein an cyclic electrical signal representative of the rotational speed of the motor is produced by magnets (22) on disc driven by the motor and Hall effect switches (23,24). The frequency of this signal is compared in a circuit (43) with the frequency of current supplied to the motor to provide an indication of motor torque. Switches (46,47) define preset torque limits for the valve. If the limits are exceeded, a signal is fed to control logic (41) which operates switches (18) to control the supply current to the motor. The speed signal from the Hall effect switches is also fed to a counter (31) to develop a count representative of movement of the valve. The output of counter (31) is compared with preset valves defined by switch circuits (37,38) to define limits of travel for the valve.Type: GrantFiled: October 26, 1981Date of Patent: January 1, 1985Assignee: Colin Frank NortonInventors: Raymond G. A. Harvey, David S. Evans
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Patent number: 4475069Abstract: A motor driving a garage door is controlled by a controller, and the rotation of the motor in the normal and reverse directions is normally controlled in response to an actuating signal applied to the controller from a main push button switch. In a specific-mode in which an actuating signal is applied to the controller from an emergency push button switch, a mat switch or a fire sensor, the latter signal has priority over the former signal, and the motor is driven to move the garage door to its full-open position.Type: GrantFiled: December 4, 1981Date of Patent: October 2, 1984Assignee: Hitachi, Ltd.Inventors: Hiroyuki Tadokoro, Shigeru Matsuoka, Koji Yamauchi
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Patent number: 4471274Abstract: A passenger vehicle door obstruction sensing control apparatus includes a first time period that begins when a door close command signal is received and the vehicle doors start to close. This first time period permits the door drive motor to reach a steady-state speed of operation. Then a motor speed responsive signal is provided to a speed reduction sensing apparatus for opening the doors for a second time period whenever the motor speed reduces below a predetermined limit.Type: GrantFiled: May 24, 1982Date of Patent: September 11, 1984Assignee: Westinghouse Electric Corp.Inventors: Steven L. Ross, Lewis C. Marascalco
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Patent number: 4467249Abstract: Apparatus is provided by which a motor vehicle window can be raised and lowered remotely by the use of a unique circuit which interfaces with the motor provided in the vehicle for such purposes. A hand-held transducer, utilizing either radio frequency energy or ultrasonic energy, is used to provide a momentary signal which activates the circuitry, configured to respond to a first signal by causing the window to be completely lowered. Transmission of a second identical signal will begin to raise the window and will continue to do so only as long as the signal remains activated.Type: GrantFiled: July 9, 1982Date of Patent: August 21, 1984Inventor: Judson S. Swearingen, Jr.
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Patent number: 4463300Abstract: A linear motor which mounts and drives a hammer bank shuttle assembly in reciprocating fashion within a dot matrix line printer is controlled by a digital servo. The digital servo includes an encoder for generating a pulse each time the shuttle assembly passes one of a succession of different positions along a linear path of movement therefor together with apparatus for measuring the time intervals between successive pulses, comparing the time intervals with a reference value, generating error signals in accordance with the difference and applying the error signals to vary the durations of driving pulses applied to the linear motor.Type: GrantFiled: September 17, 1981Date of Patent: July 31, 1984Assignee: Printronix, Inc.Inventors: David W. Mayne, Alan K. Jennings
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Patent number: 4455517Abstract: An improvement in door activating control apparatus including a short delay between the time the door is stopped during its closing direction of travel and starts moving in the opening direction when any one of any switch or button for opening the door is activated, prevents the stress incurred when the door is required to instantly reverse its direction of travel while closing, demonstrates a distinct advantage especially when controlling large heavy doors, or for door openings that require a high volume of traffic and in emergency situations, includes a means to by-pass the delayed reversing when the door is in the closed position. Features a novel means of using a single pole double throw switch which will serve to defeat a safety edge device and by-pass the delayed reversing, embodied in a single enclosure along with the door closing limit switch, all actuated by a single mechanical actuating device at the door closed position, demonstrates distinct advantages in door operator design.Type: GrantFiled: September 27, 1982Date of Patent: June 19, 1984Inventor: Donald A. Mitchell
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Patent number: 4455511Abstract: A windshield wiper mechanism includes a motor driven gear and a drive plate positioned relative thereto but selectively rotatable to enable easy change of the effective wiper parts position. A park switch to automatically stops the arm and blade at a selected position on the windshield is located on the drive gear (driving rotatable member). Removal, rotation and reengagement of the drive plate relative to the motor driven gear then easily changes the wiper park position. The drive plate is provided with at least one opening located at a radial distance from the center rotating axis of the drive plate for receiving a pin of a connecting link that will provide oscillating motion to a shaft upon which a windshield wiper arm and blade is secured.Type: GrantFiled: March 4, 1983Date of Patent: June 19, 1984Assignee: AMBAC Industries, IncorporatedInventor: Kenneth W. Stewart, Sr.
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Patent number: 4453112Abstract: Apparatus for an electrically moved sliding window used in automotive applications, having a built-in safety device is described. This detector is a proximity detector which detects the approach of a portion of a human body, e.g. a gloved hand. This detector is advantageously comprised of a capacitive pickup carried along the upper edges of the window, connected to a detector stage which, as a function of the rate of change in the signal appearing across the pickup, acts, via an amplifier, to remove the electrical power supplied to the drive motor of the window.Type: GrantFiled: March 25, 1982Date of Patent: June 5, 1984Assignee: Saint-Gobain VitrageInventors: Gerd Sauer, Dieter Unbehaun
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Patent number: 4450390Abstract: A circuit arrangement for a reversible electric motor supplied from a voltage source, which motor drives a combined window-lifter and door-locking installation in motor vehicles. The motor is switched on by way of a first operating switch developed as a reversing switch and by way of a second operating switch serving as a central switch. A position switch is assigned to the motor and is developed as a two-way switch which is operated by the motor. When the window is completely closed, the position switch may be changed over from a first switching position into a second switching position and after an unlocking operation, or before the window is opened, the position switch may again be changed over from the second switching position into the first one. During a locking operation the second input of the position switch is applied to a pole of the voltage source other than the pole used during the other adjusting operations.Type: GrantFiled: April 16, 1982Date of Patent: May 22, 1984Assignee: ITT Industries, Inc.Inventors: Marcel Andrei-Alexandru, Hans Prohaska
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Patent number: 4446407Abstract: A control circuit for an antenna rotator includes a difference amplifier which develops a motor drive signal of both positive and negative polarity for rotation of a DC motor in both clockwise and counterclockwise directions. A feedback loop circuit for control of the motor is provided by a sensor of antenna position, the sensor being coupled between the antenna and the amplifier. Friction in a gear train coupling the motor to the antenna isolates the circuit from wind induced vibrations of the antenna.Type: GrantFiled: March 8, 1982Date of Patent: May 1, 1984Assignee: Intercept CorporationInventor: Martin Sperber
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Patent number: 4445075Abstract: A valve actuator comprises a variable speed motor, a speed control circuit for controlling the motor speed including speed selector means by means of which the desired motor speed can be set to different values by adjustment means. A torque limit control circuit is arranged to stop said motor when a pre-set torque limit has been exceeded. The torque limit control includes a torque sensor arranged to provide a measure of torque from one or more torque-related electrical parameters of the motor for example a torque related current flowing in the motor, and adjustment means for setting torque limit control circuit to different torque limits.Type: GrantFiled: April 20, 1982Date of Patent: April 24, 1984Assignee: Rotork Controls LimitedInventor: Jeremy J. Fry
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Patent number: 4427929Abstract: A synchronizing circuit for a combination window and door locking system for automotive vehicles. During normal operation the door's are locked and unlocked by continued rotation of the window lifter motor. If the door locks have been manually operated between motorized operations, the locked and unlocked positions of the door locks can become out of synchronization with one another. The synchronization circuit utilizes and interconnected series of switches, position-sensitive switches and relays to control the window lifter motors. During a locking operation, the circuit automatically sequences the lifter motors first through an unlocking operation and then into their door locking positions.Type: GrantFiled: April 16, 1982Date of Patent: January 24, 1984Assignee: ITT Industries, Inc.Inventors: Marcel Andrei-Alexandru, Hans Prohaska
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Patent number: 4402194Abstract: In a refrigerator of the domestic type where the tray of an ice making apparatus is turned down to permit ice pieces to be discharged therefrom, the present apparatus takes advantage of the characteristic of a synchronous motor incorporated therein. Namely, the direction of rotation of the synchronous motor is adapted to be periodically changed and no electrical change-over switching means is included in the apparatus. In accordance with the periodic conversion of the direction of rotation of the motor, the tray is adapted to be turned down and up, alternately. Furthermore, according to the present invention, whenever the ice making tray has been turned down or up, a twisting actuation is applied to the tray, thereby to make the ice pieces separate from the wall of the tray.Type: GrantFiled: December 22, 1981Date of Patent: September 6, 1983Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Tomohisa Kuwako, Yoshitaka Fujiwara
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Patent number: 4403180Abstract: A position controlling device including a shielding plate which can be moved by a motor, three pairs of light emitting elements and light receiving elements arranged on both sides of the shielding plate and a motor controlling circuit which can control the normal rotation, reverse rotation and stop of the motor with output signals from the light receiving elements and a foot switch or centering switch simple in the formation and making no misoperation with a noise.Type: GrantFiled: October 19, 1981Date of Patent: September 6, 1983Assignee: Olympus Optical Co., Ltd.Inventor: Kosaku Tsuboshima
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Patent number: 4393342Abstract: A motor for driving a garage door is controlled by a control unit, which counts the time required for the garage door to move between an upper limit switch and a lower limit switch. The control unit sets a comparison reference time on the basis of the time thus counted, and controls the motor in such a manner that the motor driving does not continue for a period of time longer than the comparison reference time.Type: GrantFiled: December 9, 1981Date of Patent: July 12, 1983Assignee: Hitachi, Ltd.Inventors: Shigeru Matsuoka, Takeshi Tokunaga, Seiji Yonekura, Koji Yamauchi, Mitsuo Suzuki
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Patent number: 4365188Abstract: Closing and opening movements are effected by a reversible motor M. The motor M receives its power from a supply U via a feed circuit which includes switch contacts r.sub.1, r.sub.2 controlled by a relay R. The arrangement is such that a closing movement takes place when the relay is energized and an opening movement when the relay is deenergized. To select these two movements there is provided a selector switch S in the feed circuit which has two operative positions and an intermediate neutral position. The excitation winding of the relay R is included in a monitoring circuit in parallel with a strip-like safety switch SL. The strip-like safety switch SL is positioned in the path of the closing movement and has two strip-like contact bands 1, 2 which are pressed together if an object should become trapped in the path of the closing movement. If this occurs the excitation winding of the relay is short circuited and it automatically reverses the motor to convert the closing movement into an opening movement.Type: GrantFiled: August 13, 1980Date of Patent: December 21, 1982Assignee: Erwin Sick GmbH Optik-ElektronikInventor: Arthur Walter
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Patent number: 4357564Abstract: A motorized operator is used for control of a closure, e.g., a garage door operator. Where the garage door is an upward opening door, there are four conditions for operation of the control system, namely stop-down, run-up, stop-up, and run-down. The present operator is one wherein safety conditions prevail, in that the run-down condition may not be established by a simple single closing of a switch because this might be effected carelessly or accidentally. The run-down condition is only established by plural closings of a switch. Gate means are provided within the control system so that the plural actuations of the switch will establish the run-down condition and this may be established only when the door is in the stop-up condition. The plural actuations of the switch must take place within a predetermined time period in order to establish the run-down condition.Type: GrantFiled: April 9, 1979Date of Patent: November 2, 1982Assignee: The Alliance Manufacturing CompanyInventors: Andrew F. Deming, Ronald C. Todd
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Patent number: 4335339Abstract: An electronic safety device circuit is disclosed. This circuit includes two integrated circuit operational amplifiers, the first connected as an operational amplifier and the second connected as a follower. The output pin of the first amplifier is connected to the positive input pin of the second amplifier through a diode. The positive input pin of the second amplifier is connected to a memory capacitor. The output pin of the second amplifier is connected to the negative input pin of the first amplifier. A switching network is provided for grounding the positive input pin of the first amplifier and discharging the memory capacitor.Type: GrantFiled: November 20, 1979Date of Patent: June 15, 1982Inventor: Joseph L. Brickner
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Patent number: 4335342Abstract: A reciprocating drive system moves a body of defined inertia, such as a carriage supporting electrostatic spraying means, at full speed between two points at which the direction of movement is reversed. The drive system includes an electric motor with polyphase stator windings and a squirrel cage rotor. Transducers responsive to the arrival of the moving body at the aforementioned points produce output signals controlling a phase switching system which reverses the direction of rotation of the motor. Reversal of the motor torque reverses the direction of movement of the moving body within a given travel and within a given time interval to full speed in the opposite direction. A stator current limiter provides positive coupling in an operative condition and no coupling in an inoperative condition with the motor running at full speed. The motor is selected so that the inertia of its rotor closely matches that of the moving body.Type: GrantFiled: December 20, 1979Date of Patent: June 15, 1982Assignee: Air Industrie, Societe AnonymeInventor: Roger Tholome
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Patent number: 4335340Abstract: A motor control apparatus comprises an electric reversible motor, a movable member mechanically connected to the motor, first and second electroconductive bridge members rigidly mounted on the movable member, a plurality of switches, electroconductive feelers equal in number to the number of the switches, a first circuit for supplying an electric power to the first bridge member and also to the motor to rotate the latter in one of the opposite directions when energized, and a second circuit for supplying the electric power to the second bridge member and also to the motor to rotate the latter in the other of the opposite directions when energized.Type: GrantFiled: October 1, 1980Date of Patent: June 15, 1982Assignees: Toyo Kogyo Co., Ltd., ASMO Co., Ltd.Inventors: Takanori Hara, Yoshihiro Shimamura
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Patent number: 4329594Abstract: An apparatus for actuating a slidable and pivotally movable cover for use with an automobile roof opening comprises a control element, e.g. a disc, driven by an electric motor. A plurality of switch cones are preferably secured at equal radial distances from the rotational axis of the control disc. An actuating plunger is radially displaceable by each cam to move a biased actuating element which then operates a switching member of a control switch. This switches off the motor when specific portions of the cover are reached.In a first position of the actuating element, in which it is held against its bias by energized electromagnetic means, the actuating element is operable to displace the switch pin to switch off the motor. In a biased second position of the actuating element, with the electromagnetic means de-energized in consequence of the motor being switched off, the actuating element holds the switching member in its displaced position until the energizing circuit is again energized.Type: GrantFiled: April 14, 1980Date of Patent: May 11, 1982Assignee: Rockwell-Golde, a Gesellschaft mit beschrankter HaftungInventor: Horst Bohm
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Patent number: 4324161Abstract: An automatic turret lathe in which sequences are manually programmed for automatic control (both turret and cross slide) as an incident to setting up the machine, requiring neither tape nor card programs but rather the manual effort of the machinist; the lathe also incorporates a unique clutch and bearing support for the rotary turret, and the turret has a positive lock for accurately holding the index position; all essential functions and modes including feed rates and r.p.m. are visually displayed.Type: GrantFiled: July 25, 1979Date of Patent: April 13, 1982Assignee: Universal Automatic CorporationInventors: Adolph V. Klancnik, Kenneth A. Klancnik
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Patent number: 4319169Abstract: Safety control unit using a self-starting single-phase synchronous a.c. motor with a register closure.Type: GrantFiled: October 27, 1980Date of Patent: March 9, 1982Assignee: Siegenia-Frank AGInventor: Eckhard Kucharczyk
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Patent number: 4303872Abstract: An antenna control system employing a d.c. motor for extending and retracting a telescoping antenna for use on a vehicle. The control system comprises a polarity responsive timer, a polarity reversal switch, and a switching device. In one position of the switching device, a d.c. voltage of a polarity determined by the position of the polarity reversal switch is connected across the motor for an interval of time determined by the timer to extend or retract the antenna. In the other position of the switch, the vehicle operator controls the motor and therefore the antenna position.Type: GrantFiled: July 13, 1979Date of Patent: December 1, 1981Assignee: Robert Bosch GmbH Geschaftsbereich ElektronikInventors: Reinhard Alf, Kurt Klinkwitz
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Patent number: 4289995Abstract: An automatic door closer providing for use as a light duty door opener and having a slip clutch for protecting the electric gear drive power unit from damage due to overspeeding on excess loads applied by overriding manual door operation. Zener diodes across the power supply to the electric drive motor effectively throw a heavy electrical load on the motor and cause the clutch to slip if the motor is sufficiently oversped and caused to act as a higher voltage bucking generator, as by manually forcing the door substantially faster in the direction in which it is being driven. A direct current motor is used at considerably lower than its rated voltage so that electrical power may be safely applied continuously for holding the door closed with the motor stalled, and without the clutch slipping, with the clutch set to slip only when the force applied thereto is significantly higher than the force required to stall the motor yet safe for the drive unit.Type: GrantFiled: August 1, 1979Date of Patent: September 15, 1981Assignee: Keane Monroe CorporationInventors: Robert E. Sorber, James A. Gallion
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Patent number: 4287395Abstract: A timer comprising a non-directional synchronous clock motor, an operating arm projecting radially from the motor shaft, a motor control switch controlling power supplied to the motor and engaged and opened by the arm when said arm is in a normal position, stop means spaced radially from the shaft and circumferentially from the control switch to limit turning of the arm in a direction away from the control switch and to cause the motor to rotate in the opposite direction and the arm to turn back to said normal position, a service switch in a power line to related timed means and positioned relative to the control switch, stop means and arm to be engaged and operated by the arm when said arm is in a predetermined position within its travel between said control switch and stop means and starter means connected with said power supply to energize the motor and initiate turning of the arm away from said normal position.Type: GrantFiled: April 13, 1979Date of Patent: September 1, 1981Inventor: Ernest N. Martin
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Patent number: 4279490Abstract: In the disclosed device, forward and reverse rotation of a motor is used to wind and rewind a camera. A first semi-conductor switching element becomes conductive during winding and a second semi-conductor switching element becomes conductive during rewinding, the switching elements being connected in series across a power source. A selector switch has its fixed terminals connected to opposite poles of the power source. The motor is connected between the armature of the selector switch and the point between the switching elements. Driving circuits operate the switches so that the motor is driven in one direction when the selector switch is in one position and the reverse direction when the selector switch is in the other position and arranged to brake the motor after rewinding has stopped.Type: GrantFiled: October 9, 1979Date of Patent: July 21, 1981Assignee: Canon Kabushiki KaishaInventors: Yukio Mashimo, Tomonori Iwashita, Hidehiko Fukahori
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Patent number: 4271381Abstract: A windshield wiper motor control circuit is described which is directed to controlling a reversible motor. A reversing switch is switched by a relay which is controlled via switches characterizing the end positions of the wiper blade traverse of the windshield. A delay interval may be provided prior to each time the motor direction is reversed to provide intermittent operation.Type: GrantFiled: November 28, 1979Date of Patent: June 2, 1981Assignee: ITT Industries, Inc.Inventors: Joachim Munz, Hans Prohaska, Horst Rachner
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Patent number: 4259624Abstract: An arrangement for wiping a vehicle window has a wiping element adapted to rotate through a predetermined wiping angle, an electric motor having a rotatable output shaft which is connected with the wiping element so as to rotate the same, and a switching device operative for reversing the direction of rotation of the electric motor when the wiping element reaches the ends of the wiping angle. The wiping element may be mounted on the output shaft of the motor or on an output shaft of a reduction transmission between the electric motor and the wiping element. The switching device may include a direction-reversing switch whose contacts are introduced in the electric circuit of the electric motor, and two switch-actuating pins mounted on an output gear which is fitted on the output shaft. One of the switch-actuating pins may be displaceable relative to the other so that the wiping angle through which the wiping element rotates, can be adjusted.Type: GrantFiled: December 18, 1978Date of Patent: March 31, 1981Assignee: Robert Bosch GmbHInventor: Horst Seibicke
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Patent number: 4234833Abstract: The shaft driven by a reversible motor for opening and closing a door is provided with at least one reflective surface. An optical source/detector senses rotation of the shaft and generates a pulse each time one of the reflective surfaces passes. A programmable counter circuit counts the pulses in one direction when the door is opened and de-energizes the motor when a predetermined count is reached without the use of mechanical switches. The counter is decremented when the door is closed, and de-energizes the motor when the count returns to zero. Any obstruction will cause the system to stop the door if sensed during opening, or to reverse the door's direction if sensed during closing. Provision is made to account for any "coasting" the door may experience due to inertia; and the system will also track and permit small changes in the closed position of the door, as might occur if snow accumulates beneath the door.Type: GrantFiled: January 19, 1978Date of Patent: November 18, 1980Assignee: A. E. Moore Company, Inc.Inventor: Jack E. J. Barrett
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Patent number: 4229683Abstract: A movement controlling device for the movement of a movable member such as a table in a machine tool which is capable of doing a rapid feeding, a normal feeding for cutting, and a rapid returning. The movable member is driven by a fluid pressure cylinder and engaged, at a predetermined position in the forward movement stroke, with a rack which is linked to a motor by way of the gearing mechanism including a worm and a worm-wheel. The motor is so driven, due to a signal from a sensor for sensing the engagement between the rack and the movable member, as to shift the rack at the speed of cutting feed in the same direction as that of the forward movement of the movable member, and the movable member which is driven by the fluid pressure cylinder is also shifted in response to the shift of the rack.Type: GrantFiled: April 2, 1979Date of Patent: October 21, 1980Assignee: Brother Kogyo Kabushiki KaishaInventors: Kikuo Watanabe, Mitsutaka Kazino, Hisashi Yamazaki
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Patent number: 4223256Abstract: The limit switch includes a diode which is connected through a spring-operated switch in circuit with a d-c motor such that, when the motor is commanded to operate in one direction and its limit is reached, the diode is placed in blocking direction in the circuit but, upon reversal of polarity of supply to the motor to reverse its direction, the diode becomes conductive so that a closed circuit is immediately established therefor, the conductive direction of the diode being maintained until a reverse limit is reached, at which time the then conductive diode will be connected in blocked direction. During operation in the normal operating zone of the motor, the diode is short-circuited. The switches themselves can readily be constructed to be cam-operated, for example from a rotating shaft which, selectively, connects the diode in a double-pole, double-throw, center-ON circuit arrangement.Type: GrantFiled: December 27, 1978Date of Patent: September 16, 1980Assignee: Robert Bosch GmbHInventor: Helmut Espenschied
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Patent number: 4218898Abstract: A reversible drum for a laundry handling machine is described wherein the drum motor drives a timer, eliminating the use of two motors. The timer includes a bistate device driven by the motor and controlling its sense of rotation.Type: GrantFiled: September 8, 1978Date of Patent: August 26, 1980Assignee: ITT Industries, Inc.Inventors: Lodewijk J. T. Boyen, Rene N. J. D'Huys
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Patent number: 4182980Abstract: Method and apparatus for controlling variations in position of automatic equipment for spraying coating products, such as, for example, automatic sprayers of paints, enamels, fibres, etc., mounted on reciprocators which give them a to-and-fro movement. The carriage carrying the sprayer also carries springs which strike the stops at the end of the path of travel. While the said springs are being compressed and released, the electrical supply of the motor is cut off by limit switches.Type: GrantFiled: May 17, 1976Date of Patent: January 8, 1980Assignee: Air IndustrieInventor: Roger Tholome
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Patent number: 4179223Abstract: Three fixed optical sensing devices are positioned to sense the left and right margins as well as the center location of high speed printer carriage travel. Signals from the sensing devices are fed to programmed carriage logic control circuits which effect rapid carriage movements relative to the center location as well as the traditional left and right margin locations. Printing time of certain forms is greatly reduced by minimizing unnecessary carriage return to the left margin location.Type: GrantFiled: September 22, 1977Date of Patent: December 18, 1979Assignee: Bunker Ramo CorporationInventors: Okun Kwan, Nicholas Zaccagnino
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Patent number: 4167694Abstract: A control device is disclosed for controlling the drive means and consequently the oscillation range of a periodically oscillating member particularly when it is necessary to maintain the speed of the periodic oscillation movement such that it corresponds to the average speed of another drive unit. Two movably mounted sensors are located near opposite ends of a predetermined oscillation range of the oscillating member. When either of the sensors senses the presence of the oscillating member beyond the predetermined oscillation range, a signal is generated by the sensor which is transmitted to control means adapted to adjust the speed of the drive means operating the oscillating member.Type: GrantFiled: December 2, 1977Date of Patent: September 11, 1979Assignee: Hergeth KG Maschinenfabrik und ApparatebauInventors: Eduard Hille, Jurgen Andermann
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Patent number: 4145641Abstract: An automatically-openable-and-closable-door operating apparatus uses a capacitor torque motor in order to automatically open or close the door. When opening or closing the door, an exciting coil of the motor is first short-circuited as the door approaches the open or close terminal so that the motor undergoes a dynamic braking to absorb an inertia of the door and to decelerate the door. Thereafter the short-circuiting or connection and the disconnection across the exciting coil are repeated alternately to have the motor produce a driving force and a braking force alternately so that the door may be brought into its opening or closing terminal position at a low speed without accompanied by shocks.Type: GrantFiled: September 15, 1977Date of Patent: March 20, 1979Inventor: Kazuyoshi Ozaki
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Patent number: 4138630Abstract: Electrically operable switching circuitry is effective to energize, in response to the application of a control signal, a commutated electrical motor in a first direction for driving a member driven thereby through a travel stroke and to energize, in response to the removal of the control signal, the motor in a second direction for driving the member driven thereby through another opposite travel stroke and an electrical signal produced while the motor is in the run mode is effective to maintain the switching circuitry operated for motor energization. Upon motor stall when the member driven thereby has reached the end of a travel stroke, the electrical signal produced while the motor is in the "Run" mode terminates and the switching circuitry then operates to deenergize the motor.Type: GrantFiled: July 5, 1977Date of Patent: February 6, 1979Assignee: General Motors CorporationInventor: Donald E. Graham
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Patent number: 4134052Abstract: A controlled bi-directional electric motor is energized for armature rotation in respective opposite directions in response to the operation of an electrical control switching arrangement electrically open and electrically closed. A mechanically operable electrical switching device arranged to be operated by a mechanical movable member that is driven between first and second travel limits by the controlled motor is effective, when the movable member is driven by the motor to either travel limit, to interrupt motor energization and to condition the circuit for effecting motor energization for armature rotation in the direction to drive the movable member toward the other travel limit.Type: GrantFiled: October 17, 1977Date of Patent: January 9, 1979Assignee: General Motors CorporationInventors: Bert R. Wanlass, Anthony March
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Patent number: 4134051Abstract: A controlled bi-directional motor is energized through a power switching arrangement of the type electrically operable in a manner to energize the motor for rotation in one direction and in another manner to energize the motor for rotation in the opposite direction. Circuitry including a single pole-single throw electrical switching device is responsive to the operation of the switching device electrically open to operate the power switching arrangment in the manner to energize the motor for rotation in a first direction and other circuitry also including the electrical switching device is responsive to the operation of the electrical switching device electrically closed to operate the power switching arrangment in the manner to energize the motor for rotation in the opposite direction.Type: GrantFiled: September 9, 1977Date of Patent: January 9, 1979Assignee: General Motors CorporationInventors: Paul F. Pelchat, Anthony March
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Patent number: 4132939Abstract: This invention relates to a driving signal control circuit, in which at least four detecting points (or detectors) are arranged for detecting the position of the working table, which is repeatedly reciprocated between the detecting points.Type: GrantFiled: July 21, 1977Date of Patent: January 2, 1979Assignee: Hitachi, Ltd.Inventors: Masayoshi Kameyama, Hiroshi Horiguchi, Kazuo Ichino
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Patent number: 4131831Abstract: A drapery opening and closing system is provided for draw drapes which are movable over a traverse member between an open and closed position by use of a drape drive system. The opening and closing system has limit switches positioned to be activated when the drapes are opened and closed. A manually settable timer connected to a power source applies power at preset times to a reversible motor via a control circuit. The control circuit is comprised of a relay activated by the timer and a series connected two-section switch. Outputs of the two-section switch are connected to the reversible motor through the limit switches. When the timer is triggered at a preset time, the drapes automatically open or close. Via the two-section switch, the drapes may be manually activated to open or close at times other than the preset times on the timer.Type: GrantFiled: June 13, 1977Date of Patent: December 26, 1978Assignee: Michael S. BochenekInventors: Michael S. Bochenek, Bradley X. Boyer
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Patent number: 4110675Abstract: An apparatus is provided for controllably moving a load in a return mode back to a first or home position by a motor driven shaft, which shaft moves the load toward a second position in a forward mode to track a moving object field. An apertured fan-shaped timing disk or element is secured to the rotating shaft to move therewith. A position feedback sensor senses the angular displacement of the shaft by generating a feedback signal upon optoelectronically sensing an aperture in both the forward and return modes. An optoelectronic sensor detects the passage of the moving object field to provide a return signal after the object field has passed a predetermined position. A motor and its amplifier controllably move the load back to the first position in the return mode in response to the return signal. The inertia of the system causes the shaft to rotate to move the load to the second position in the return mode after responding to the return signal.Type: GrantFiled: June 8, 1977Date of Patent: August 29, 1978Assignee: Burroughs CorporationInventor: Daniel A. Wisner
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Patent number: 4097786Abstract: An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A processing circuit is responsive to direction and drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. The processing circuit includes a switching device which applies a DC voltage to the motor windings to hold the valve position when it is not being driven. A limit sensing device provides a limit signal when the movable member of the actuator approaches a limit of travel. A limit control circuit responds to the limit signal to alternately reverse the direction signal applied to the processing circuit so long as that signal is representative of the direction in which the limit is being approached.Type: GrantFiled: June 16, 1976Date of Patent: June 27, 1978Assignee: E-Systems, Inc.Inventor: Bryant D. Lund
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Patent number: 4096421Abstract: The pressing machine includes a pressing ram, a drive arrangement for moving the ram from a starting position to an end-of-stroke position and back to the starting position and includes an electric drive motor. A control arrangement establishes the end-of-stroke position for the ram. The control arrangement includes a direction-reversing circuit connected to the drive arrangement for reversing the direction in which the drive arrangement moves the ram and includes a direction-reversing relay arrangement having a current path for activating current. A controllable electronic switch is connected to the activating current path for controlling the activation of the direction-reversing relay arrangement. A control-signal-generating circuit controls the conductivity of the electronic switch by generating and applying to the control input of the electronic switch a control signal dependent at least upon the loading of the drive motor.Type: GrantFiled: June 18, 1975Date of Patent: June 20, 1978Assignee: Bosch-Siemens Hausgerate GmbHInventors: Karl-Heinz Farber, Rolf Mayer
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Patent number: 4092575Abstract: Apparatus for automatically controlling the operation of a reciprocable door between its closed and opened positions. A position sensing means is provided for sensing the position of the door during its opening and closing strokes to decelerate the speed of the door at a final portion of the door stroke, thereby preventing the door from striking an outer door frame.Type: GrantFiled: August 30, 1976Date of Patent: May 30, 1978Assignee: Yoshida Kogyo K.K.Inventors: Masaaki Ogishi, Akira Azuma
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Patent number: 4090113Abstract: A method of driving a door of an automatic door assembly by a linear motor mounted within the automatic door assembly. The method comprises the steps of driving the door by at least a normal propulsion force of the linear motor, driving the door by a propulsion force which may range from zero to nearly the normal propulsion force, and then driving the door by the normal force again thereby reducing the speed of travel of the door during its opening and closing intervals.Type: GrantFiled: June 10, 1976Date of Patent: May 16, 1978Assignee: Yoshida Kogyo, K.K.Inventor: Masaaki Ogishi
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Patent number: 4078198Abstract: Two extreme points of a range within which a movable body is reciprocated, are set by two position setting means provided with variable resistors. The voltage at the sliding contact of a variable resistor coupled to the movable body is always compared with the voltages preset by the respective position setting means. The two signals produced as a result of the two comparisons are applied to a control circuit, the output of which causes the motor to drive the movable body to rotate in the forward or reverse direction in accordance with the two signals. Thus, the movable body automatically performs a reciprocal motion between the two preset extremes.Type: GrantFiled: November 25, 1975Date of Patent: March 7, 1978Assignee: Hitachi, Ltd.Inventors: Takeo Murakosi, Toshiyuki Tanno
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Patent number: 4070607Abstract: A control device for a motor-driven closure panel, for instance an automobile sunroof panel whose closed position is an intermediate position between an open, retracted position and another open, pivoted position, the circuitry for the reversible motor including an impulse relay operating a control switch in one of the two motor connections, the relay coil being connected in parallel to the motor and between the control switch and the pole reversing switch, a position-responsive switch cutting off the relay circuit whenever the panel moves out of its closed position and energizing the impulse relay whenever the panel reaches the closed position. An improved switch arrangement prevents the panel from being stuck in a position in which the reversible motor becomes inoperative.Type: GrantFiled: October 29, 1975Date of Patent: January 24, 1978Assignee: Webasto-Werk W. Baier GmbH & Co.Inventor: Erik Mitterer