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 |
| 7378721 | Chip on lead frame for small package speed sensor A sensor package apparatus includes a lead frame substrate that supports one or more electrical components, which are connected to and located on the lead frame substrate. A plurality of wire bonds are also provided, which electrically connect the electrical compone... | 05/27/2008 |
| 7333084 | Thumbwheel and switch for a mobile electronic device and methods thereof A mobile electronic device has a thumbwheel subassembly having measurable rotatable and depressible input movements, for example, rolling the thumbwheel up, rolling the thumbwheel down and pushing the thumbwheel inwards. Pushing the thumbwheel with a measurable comp... | 02/19/2008 |
| 7221858 | Pulse-width modulation motor speed control circuit A PWM motor speed control circuit (10) includes a PWM signal generator (20), a driver integrated circuit (IC) (101) and a photocoupler (30) coupled between the PWM signal generator and the driver IC. The photocoupler receives an original ... | 05/22/2007 |
| 7151349 | Fan speed control A method of synchronizing a pulsed drive signal applied to a DC fan motor to the TACH output of the motor is described. DC motors include a rotor that rotates in a path defined by a plurality of magnetic poles and the method defines an ideal TACH output for a specif... | 12/19/2006 |
| 7149646 | Pilot indicator for predicting changes in the speed of rotation of the main rotor of a rotorcraft The present invention relates to a pilot indicator for a rotorcraft provided with a main rotor and at least one gas turbine engine. The indicator has first and second sensors delivering information relating respectively to a first speed of rotation Nr corresponding ... | 12/12/2006 |
| 7123998 | Automated transmission systems An automated transmission system includes a transmission brake which is used to apply a braking torque to the transmission, while the engine torque is negative and a transmission clutch is disengaged to effect a gear downshift, in order to avoid acceleration of the ... | 10/17/2006 |
| 7075261 | Method and apparatus for controlling a fan A method and apparatus for controlling a fan is disclosed. In one embodiment, a method for controlling a fan includes applying power to the fan at startup. The fan may be supplied a predetermined amount of current, which may break the inertia of the fan propeller an... | 07/11/2006 |
| 6998813 | Device for generation of a signal dependent on rotational speed for an electric motor, in particular for an electronically-commutated DC motor The invention provides a device to generate an rpm-dependent signal, or a tachogenerator, having a plurality of magnet elements with alternating polarity which are arranged and distributed around the circumference of the rotor shaft. The magnet elements preferably t... | 02/14/2006 |
| 6979968 | Method and system for managing processor execution time utilizing variable frequency switching The present invention includes a method for managing processor execution time in a motor controller. The method includes receiving motor speed data, comparing the received motor speed data to predetermined motor speed ranges, determining a motor speed range based on... | 12/27/2005 |
| 6956378 | Signal supply apparatus and method for examining the same, and semiconductor device, electro-optical apparatus and electronic apparatus using the same In a signal supply apparatus such as might find use in an electro-optical device, signals that are supplied from multiple digital-to-analog converters are subject to impedance conversion by respective voltage followers, and provided as outputs to control the operati... | 10/18/2005 |
| 6934661 | Wafer edge detector A method for detecting wafer flat shift, and an apparatus (500) having two sensors (506a) and (506b) in a power supply circuit (600) for wafer fabrication equipment, the sensors (506a) and (506b) ... | 08/23/2005 |
| 6933699 | Motor drive circuit and method with frequency setting and correcting functions A motor drive circuit and method with frequency setting and correcting functions. The drive circuit includes a speed control device, which simultaneously receives a sense signal and a rotation frequency signal. A pulse width modulation signal capable of modulating a... | 08/23/2005 |
| 6831434 | Control circuit for brushless DC motor equipped with protective circuit In order to prevent stator windings and power amplification semiconductor devices from being damaged by heat when a rotor is locked, a current feed term setting circuit that maintains an output signal circuit of a logical circuit in “OFF” state to completely cut... | 12/14/2004 |
| 6828816 | Method and apparatus for measuring and adjusting response time of liquid crystal display device A method of measuring a liquid crystal response speed includes steps of generating a sample pulse having a target voltage level and a variable voltage level that varies according to a response characteristic of a display panel, applying the sample pulse to the displ... | 12/07/2004 |
| 6768333 | Test circuit for input-to-output speed measurement A test circuit aids in accurately measuring the input pin to output pin signal propagation speed through an integrated circuit by providing a D flip-flop in the signal path near the output pad to register the arrival of a test signal transition. The flip-flop is clo... | 07/27/2004 |
| 6759973 | High resolution position sensor A high-resolution position sensor device for use in precise positioning of servomechanisms, by providing increased resolution using of an encoder mounted on the shaft of a motor, which produces transition pulses through a light-sensitive arrangement using a photodet... | 07/06/2004 |
| 6737860 | System for controlling rotational speed of fan according to reference clock frequency A system for controlling the rotational speed of a fan, according to a reference clock having a reference frequency, is disclosed. The rotational speed corresponds to a fan rotational speed signal. The fan rotational speed controlling unit compares the reference clo... | 05/18/2004 |
| 6559634 | Vehicle wheel rotation detecting system and method In a vehicle wheel rotation detecting system, a signal input portion of an ECU accurately detects a vehicle wheel speed and a rotating direction of the vehicle wheel speed of the respective wheels. On the basis of the detected results, the respective comp... | 05/06/2003 |
| 6442502 | System for detecting rotating speed An arrangement for sensing the rotational speeds of a wheel or any other rotating member includes a sensor module with a sensor element, a controllable current source with a modulator and a signal conditioning and evaluating circuit. The modulator control... | 08/27/2002 |
| 6430040 | Foldable bicycle computer A bicycle computer includes a base member structured to mount to a structural member of a bicycle. A cover having an inner surface is swingably coupled to the base so that the inner surface may be moved from a closed position where the inner surface faces... | 08/06/2002 |
| 6194850 | System and method for determining true ground speed in a locomotive A processor system and method for accurately determining true ground speed in a vehicle having wheel-axles propelled by traction motors is provided. The vehicle is equipped with a radar unit for providing a radar signal indicative of vehicle speed relativ... | 02/27/2001 |
| 6144198 | System and method for determining rate of rotation using brushless DC motor A system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is squared. The squared outputs associated with each winding ... | 11/07/2000 |
| 6137399 | High performance tachometer having a shift indicator system with "short-shift" protection A high performance tachometer is provided for use in high performance racing vehicles, such as dragsters. The tachometer has an input signal indicative of the vehicular engine speed and an output display for displaying the instantaneous engine speed as in... | 10/24/2000 |
| 6109103 | Rotational speed sensing device A rotational speed sensing device is disclosed which comprises a reference member adapted to be rotated at a reference speed, a rotational device coaxial with the reference member, the rotational device adapted to be rotated at a speed, a sensor associate... | 08/29/2000 |
| 6087826 | Device for detecting electromagnetic stray effects in systems with at least two inductive sensors providing periodic output signal A device for detecting electromagnetic stray effects in systems with at least two inductive sensors which provide an essentially periodic output signal, performs a signal evaluation for evaluating signals of the sensors, a test for detecting an electromag... | 07/11/2000 |
| 6037765 | Method and system for determination of speed of revolution of a rotating part by periodic recordation of detected signals associated with any one of a plurality of discontinuities on the part A method for the exact determination of the speed of a rotating part, in particular the speed of the wheel of a motor vehicle, in which discontinuities present on the circumference of the rotating part are scanned without contact, an electric pulse being ... | 03/14/2000 |
| 6002732 | Method and apparatus for adjusting phase of internal clock signal In a phase adjusting circuit, a signal generating circuit generates an internal signal based on an external signal and a feed-back signal. An output circuit outputs to a load circuit the internal signal having a first delay with respect to the generated i... | 12/14/1999 |
| 5923163 | Method for defect detection in rotational speed sensors At certain operating points, a plausibility test of the detected rotational speed signals is used to recognize an existing defect. The operating point for implementing the plausibility test is determined when it is detected that the motor vehicle has acce... | 07/13/1999 |
| 5886497 | Control arrangement for escalator or moving walk A safety control arrangement for escalators includes a detector for generating a trigger signal, and a microprocessor connected to a memory. A serial data communications bus connects the detector to the processor. The memory includes toggling and interrog... | 03/23/1999 |
| 5831429 | System for detecting and monitoring the rotational speed of at least one rotor and the rotational speed of at least one motor of a rotary-wing aircraft, such as a helicopter The system detects and monitors the rotational speed NR of a rotor and the rotational speed NTL of a motor of a helicopter and includes first and second devices for detecting NR and NTL, and delivering signals t... | 11/03/1998 |
| 5811679 | Wheel Tachometer A wheel tachometer minimizes variances in the rate of revolution detected by the wheel velocity sensors of the tachometer due to assembling errors and improves the accuracy of the operation of driving force allocation. Sinusoidal wheel velocity signals vF... | 09/22/1998 |
| 5773972 | Transition detection circuit for detecting transitions in the state of an object of detection A detector 1, with its object of detection having operation characteristics that include a shift from a first state to a second state, outputs a signal e1 that corresponds to the operation characteristics of the object of detection. A first state detectio... | 06/30/1998 |
| 5734265 | Method to compute probable speed of a vehicle equipped with a mini tire A method is provided to compute the probable body speed of a vehicle equipped with a mini tire as a spare tire, specifically when the mini tire is mounted. The wheel speeds of the four wheels are measured, and if the speed does not satisfy the predetermin... | 03/31/1998 |
| 5650718 | Method and device for monitoring rotational speed sensors of vehicles for faults using a slip coefficient weighted by time A method and a device for monitoring rotational speed sensors, in particular rotational speed sensors for identifying the wheel speed, are described. A fault is detected if a slip coefficient which is weighted with the time exceeds a threshold value.... | 07/22/1997 |
| 5642280 | Method and system for determining and compensating for a faulty wheel speed input signal in a vehicle control system Method and system are provided for "filtering out" a faulty wheel speed input signal in a vehicle control system, such as an ABS and/or TC system in order to ensure that the faulty wheel speed input signal does not contaminate or corrupt wheel speed infor... | 06/24/1997 |
| 5640086 | Tachometer based on electrical ripple and calibrated by mechanical engine signals The tachometer includes a microphone for disposition next to the exhaust of the vehicle and an accelerometer for disposition adjacent to its engine. A selected one of the outputs is connected to an ADC which provides digital samples to a central processin... | 06/17/1997 |
| 5583800 | Vehicle speed sensor utilizing relationship between vehicle wheel speed and doppler-effect speed The apparatus has a signal processor for determining the ground speed of a motor vehicle on the basis of the frequency of a wave transmitted from a transmitter and the frequency of the wave reflected by the ground surface and received by a receiver. The s... | 12/10/1996 |
| 5576960 | Driving force controlling apparatus for vehicle To prevent a great variation of a detected wheel velocity for a period of time after a front wheel sensor or a rear wheel sensor for detection of a wheel velocity actually fails until a microcomputer detects the failure, it is determined whether or not an... | 11/19/1996 |
| 5569848 | System, method and apparatus for monitoring tire inflation pressure in a vehicle tire and wheel assembly A system, method and apparatus for use on vehicles having road wheels with pneumatic tires that includes sensors that produce signals that are a measure of the rotational speed of said wheels, indicators arranged to provide information to the driver of th... | 10/29/1996 |
| 5552985 | Cruising control apparatus A cruising control apparatus for a vehicle, which comprises a vehicle speed sensor, a command switch, a microcomputer for generating an actuator control signal and including a vehicle speed signal memory and a watch-dog signal generator for generating a p... | 09/03/1996 |
