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 |
| 7239103 | Synchronous motor startup lock detection circuit and method A startup failure detection system provides an indication of motor startup failure based on a flux amplitude signal value. The flux amplitude signal is derived from motor flux estimations in combination with a rotor angle estimation. The flux amplitude signal value ... | 07/03/2007 |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 7005821 | Servomotor controller In a servomotor controller, when a comparing circuit (70) detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating section (71) supplies an operation inhibiting signal (7... | 02/28/2006 |
| 6851637 | Variable use fly-fishing reel A fly-fishing reel has a reel body with a reversible pawl and an arbor. A spindle shaft with a gear rotates on the arbor, the gear and pawl limiting the direction of rotation. A spool and lockably engaged drive plate rotate on the spindle shaft and are secured there... | 02/08/2005 |
| 6469465 | Precision micro-motor position controller A micro-motor position controller utilizes a ratiometric position sensor that operates independent of any reference voltage sources. A first capacitor and a second capacitor in a micro-motor are connected in series and form one section of a capacitive bri... | 10/22/2002 |
| 5866962 | Rotor position detecting apparatus in switched reluctance motor A switched reluctance motor is provided with a rotor position detecting apparatus for detecting a rotor position wherein the apparatus comprises a rotor position-sensing mechanism removably mounted in a ventilator hole formed in a side wall of a motor hou... | 02/02/1999 |
| 5744925 | Control method and apparatus for two-wire motor actuator An actuator for automotive HVAC control is coupled to a remote controller by two wires. The controller applies power to the actuator in a high current or a low current mode. A variable resistance driven by the actuator generates a voltage proportional to ... | 04/28/1998 |
| 5712548 | Bi-directional motor actuator A motor actuator for preventing a motor from drawing excess current for longer than a predetermined time delay period including dynamic brakes for simultaneously braking motor rotation when motor operation is terminated for any reason. Source voltage supp... | 01/27/1998 |
| 5680022 | Reversing motor speed controller with joystick A simple speed controller for small direct current motors having a hollow body with a joystick extending out from the body. Within the housing the two facing side walls have nonconductive substrates with conductive traces. Transistors are connected to bot... | 10/21/1997 |
| 5666036 | Circuit for driving the motor of a temperature blend door A circuit for driving a motor used to control the HVAC blend door in an automobile is disclosed. The circuit includes an amplifier circuit, an motor, and a three state driver circuit. The driver circut includes three NPN bipolar transistors and two PNP bi... | 09/09/1997 |
| 4903318 | Electric switch system for a power tool An electric switch system for a DC motor powered power tool, comprising: a moveable block which is adapted to be manually displaced between a first position and a second position for speed control of the motor; a fixed block arranged adjacent to the first... | 02/20/1990 |
| 4647825 | Up-to-speed enable for jam under load and phase loss A motor controller with means responsive to a motor condition for preventing termination of power to the motor in response to fault conditions when these fault conditions occur during start-up of the motor.... | 03/03/1987 |
| 4395667 | Non-linear control arrangement for printing machines A non-linearly operating control arrangement for driving units, such as those of damping devices of printing machines, includes a plurality of parallel resistance-diode bridges having two inputs and two outputs, a pair of resistors interposed between one ... | 07/26/1983 |
| 4210851 | Motor control system A motor control system for controlling the speed and direction at which a motor operates. A drive circuit is provided for supplying a drive current to the motor, the magnitude of the drive current being determinative of the speed at which the motor operat... | 07/01/1980 |
| 4174617 | Turbocharger control system By comparing with the magnitude of a sea-level reference parameter, an electrical parameter in a pressure-temperature sensor or sensors coupled to the air induction system of an internal combustion engine, particularly a turbocharged engine, a control sig... | 11/20/1979 |
