Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7180256 | Electronically controlled power steering system for vehicles and method and system for motor control A power steering device capable of obtaining a high rotary speed in the medium low torque range of an electric motor without incurring a drastic increase in manufacturing cost. The power steering device generates an auxiliary steering power by oil pressure that is g... | 02/20/2007 |
| 6864650 | Winch controller A solid state controller is provided for a winch and includes fault detection for several parameters and overload interrupt controlled by the controller. The system uses a single controller that can be programmed for several different products and utilizes MOSFET sw... | 03/08/2005 |
| 6369530 | Battery-powered wireless remote-control motorized window covering assembly having controller components A wireless battery-operated window covering assembly is disclosed. The window covering has a head rail in which all the components are housed. These include a battery pack, an interface module including an IR receiver and a manual switch, a processor boar... | 04/09/2002 |
| 6259218 | Battery-powered wireless remote-control motorized window covering assembly having a microprocessor controller A wireless battery-operated window covering assembly is disclosed. The window covering has a head rail in which all the components are housed. These include a battery pack, an interface module including an IR receiver and a manual switch, a processor boar... | 07/10/2001 |
| 5892338 | Radio frequency remote control for trolling motors A trolling motor system comprises a trolling motor having a propeller rotatably driven thereby. The motor is connected to a rotating tube or column mounted to the boat. A control head is mounted at the upper end of the column. A steering motor in the cont... | 04/06/1999 |
| 5779817 | Circuit arrangement of solar cells A circuit arrangement with a first string of solar cells which are connected together in series and a second string of solar cells which are connected together in series, the electric power generated by the solar cells being used to operate an ohmic or in... | 07/14/1998 |
| 5629590 | Rotational drive control device for variable speed drive motor A rotational drive control device for a variable sp drive motor capable of accomplishing radio transmission of a signal for VSD (Variable Speed Drive) rotational drive control of a variable speed drive motor arranged in a rotational drive system of any eq... | 05/13/1997 |
| 5457373 | Electric motor with integrally packaged day/night controller An AC motor is provided with a motor housing and a photoelectric sensor associated with the housing. The sensor is part of a motor control circuit which is thereby responsive to the ambient light condition to control the motor by selectively switching At ... | 10/10/1995 |
| 5272426 | Control loop for motorized shutter operation A light system is disclosed for controlling the amount of light supplied from a high density light source to a target. A shutter is positioned between the light source and the target, and a motor is coupled to said shutter to control the position of said ... | 12/21/1993 |
| 5233277 | Apparatus for controlling the operation of electric motors in sewing machines The electric motor and the needle locating device of a sewing machine are adjusted by a pivotable treadle controlling a radiation directing member which is located in the path of radiation issuing from one end of one or more first optical fibers the other... | 08/03/1993 |
| 5134347 | Low power consumption wireless data transmission and control system A low power consumption wireless data transmission and control system 10 is disclosed and in one embodiment, is used to automatically articulate a shade 24 by use of a transmitted command signal 14. The system 10 contains a receiver/detector 18 which is s... | 07/28/1992 |
| 5081402 | Low power consumption wireless data transmission and control system A low power consumption wireless data transmission and control system 10 is disclosed and in one embodiment, is used to automatically articulate a shade 24 by use of a transmitted command signal 14. The system 10 contains a receiver/detector 18 which is s... | 01/14/1992 |
| 5077823 | Electric motor starting circuit The invention provides a cushioning control circuit which restricts the initial flow of current to a D.C. permanent magnet motor by providing a neon control lamp in series with a pair of triac control circuits which drops the initial voltage imposed on th... | 12/31/1991 |
| 4947099 | Motor controller with optical SCR's A three-phase electric motor is coupled to each phase line of an electric source by pairs of SCR's coupled in inverse parallel relationship. One of the SCR's in each pair is triggered by a signal from a conventional motor control circuit which regulates t... | 08/07/1990 |
| 4910789 | Apparatus for controlling the adjustment rate of a lens assembly A constant speed driving apparatus comprises a starting means for starting a control unit, the first pulse-generating means for generating the first pulse signal with a predetermined frequency, a driving mechanism for driving a load, the second pulse-gene... | 03/20/1990 |
| 4862048 | Speed control system In a speed control system for a carriage movable along a predetermined path, light beams originating at the ends of the path are deflected by light conductors aboard the carriage so that they are interrupted, as the carriage moves, by a slotted plate exte... | 08/29/1989 |
| 4859918 | Method and apparatus for producing a speed control voltage for direct current motors in typewriters or similar office machines A method and means for producing a control voltage for controlling a direct current motor makes use of a tachometer voltage providing two ninety degree phase shifted tachometer signals. From these are derived four coding signals comprising the tachometer ... | 08/22/1989 |
| 4857811 | Evacuation pump control for a centrifuge instrument A centrifuge instrument has a vacuum pump responsive to a rotor recognition arrangement. The pump is operative to provide a predetermined pressure level in the chamber compatible with which one of a plurality of rotors is mounted within the chamber. The r... | 08/15/1989 |
| 4847555 | Device for detecting rotational speed of a motor using first and second sensors and a switching unit to select between the two sensors A device for detecting the rotational speed of a motor by a first rotational speed sensor and at least a second rotational speed sensor and a switch unit connected to the rotational speed sensors, the switch unit selecting signals from one of the sensors ... | 07/11/1989 |
| 4845608 | Digital speed controller using a single-chip microcontroller A speed regulator digital speed controller for rotating machinery is comprised of a single-chip microcontroller operating in conjunction with a multiple counter/time peripheral, and is programmed in a high level language. Pulses are generated by a digital... | 07/04/1989 |
| 4837486 | DC motor speed stabilizing method and apparatus The speed of a DC motor is stabilized to correspond to a reference speed by a motor driving control that is instantaneously responsive to the interval between reference pulses corresponding to the reference speed and actual observed pulses corresponding t... | 06/06/1989 |
| 4831313 | Two speed motor controller An electronic control for regulating the operation of a two-speed motor in a heat transfer system such as a heat pump or air conditioner. The control receives high and low demand signals from a thermostat and a motor unit operates at high and low speeds i... | 05/16/1989 |
| 4827197 | Method and apparatus for overspeed protection for high speed centrifuges An apparatus and method of protecting a centrifuge from rotor overspeed and resultant mishap by computation of the rotor moment of inertia is disclosed. In the preferred embodiment, a centrifuge is driven by a rotor mounted on a shaft which shaft is in tu... | 05/02/1989 |
| 4827202 | Method of and circuitry for automatically adjusting the variable-gain amplification in a control loop In a control loop for automatically adjusting variable-gain amplification, a sinusoidal signal with a frequency fo that is critical for the control loop is superimposed over a positioning parameter W. Two synchronous rectifiers S1 and S2 filter... | 05/02/1989 |
| 4823055 | Electronic control circuit for command systems A control circuit for a closed loop command system having an output which is adjusted to conform with an input command level. A pulse generator provides digital pulses with durations representative of the output of the system. Command pulses are generated... | 04/18/1989 |
| 4780654 | Control apparatus for drilling machine A drilling machine comprises an electric drill having a drill motor for rotating an annular drilling tool and a feed control motor for moving the annular drilling tool forward and backward with respect to a workpiece, both connected to an AC power source,... | 10/25/1988 |
| 4763054 | Level detector A level detector includes first and second comparators each having two inputs and an output wherein the first comparator receives an input signal and a first reference signal at the two inputs thereof and develops a first comparison signal when the input ... | 08/09/1988 |
| 4755730 | Variable resistance output motor controller In a thermostatic control system a solid state motor controller is provided by reproducing a potentiometer tracking with a CPU producing appropriate complimentary square wave signals having the duty cycle thereof proportional to a sensed temperature. The ... | 07/05/1988 |
| 4728869 | Pulsewidth modulated pressure control system for chemical vapor deposition apparatus A low pressure control system for chemical vapor deposition (CVD) apparatus, including a vacuum pressure chamber and an exhaust pump, is provided by a vacuum pump DC motor which is supplied power from a DC motor speed controller coupled to a DC control in... | 03/01/1988 |
| 4701685 | Controlling a d.c. motor A d.c. motor is controlled by means of current pulses; each pulse ends by and in synchronism with an optical disk pulse. The period between respective two pulses is referenced to a particular period for determining the sign of a speed derivation, and the ... | 10/20/1987 |
| 4698567 | Ribbon deck motor control Apparatus for adapting a common dc motor for use in a typewriter to drive the ribbon lift and advance functions. The motor is coupled by means of a set of gears to a shaft on which are mounted the ribbon advance gear and ribbon lift cams. Also mounted on ... | 10/06/1987 |
| 4672396 | Hard copy recorder paper speed control A hard copy recorder is provided in which paper or film is moved along a paper path by a motor-driven roller. A tension-measuring dancer measures paper or film tension. The position of the dancer is sensed by an optical sensor, which produces a signal rep... | 06/09/1987 |
| 4639649 | Motor control device A motor control device comprises a motor speed detector, a reference signal generator and a control circuit for controlling rotation of a motor in accordance with a reference signal from the reference signal generator and a speed signal from the motor spe... | 01/27/1987 |
| 4629980 | Testing limits of speed variations in motors Motor test circuit for supplying an error indication signal if the speed variations of a motor under test exceed predetermined limits. The circuit includes a frequency-to-voltage converter or other source of voltage proportional to the motor speed and a r... | 12/16/1986 |
| 4630210 | Microprocessor controlled d.c. motor for controlling a load Apparatus is provided for controlling the velocity of a portion of a load in accordance with a trapazoidal-shaped velocity versus time profile. The apparatus includes a d.c. motor having an output shaft for driving the load; instrumentalities for sensing ... | 12/16/1986 |
| 4625156 | Control device A device for controlling plural loads with phase locked loop control method by means of reference signals of different phases in order to avoid peak in electric power consumption.... | 11/25/1986 |
| 4567414 | Method and a device for controlling a brush-commutator assembly of an electric machine A method and a device for controlling a brush-commutator assembly of a machine under application of an electrical processing and control unit, by sensing one or more operating parameters of the electric machine, the sensing values being processed and conv... | 01/28/1986 |
| 4551715 | Tachometer and rotor identification apparatus for centrifuges An apparatus for determining the actual speed and maximum safe speed of a centrifuge rotor. A single circular array of equally spaced coding elements of two clearly distinguishable types is attached to the rotor. A single detector responsive to the coding... | 11/05/1985 |
| 4507110 | Adjustable photosensor mounting arrangement for a centrifuge A mounting arrangement for a rotor speed photosensor assembly includes a mounting ring fixedly attached to the stationary element of the centrifuge. The mounting ring has a cutout portion thereon which is adapted to receive a photosensor mounting board wh... | 03/26/1985 |
| 4463294 | Windshield wiper control apparatus A control circuit for a windshield wiper motor which utilizes a plurality of infrared emitters that emit a chain of infrared pulses towards a plurality of infrared sensors. When rain passes between the infrared emitters and the infrared sensors, it will i... | 07/31/1984 |
