Bizarre Patents
Decorative Jeweled Wheel Cover
An improved wheel is provided wherein decorative items such as gem stones are embedded in either the wheel surface, a special mounting section attached to the wheel surface, or to a spoke strap that wraps around each spoke and positions embedded gem stones on the outside surface of the spoke.
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| Number | Title | Issue Date |
| 7402967 | DC power source A DC power source includes one or more insulation type DC-DC converters and a plurality of cells, and is capable of reducing an amount of power loss at an insulation type DC-DC converter. The DC power source includes a pair of terminals for outputting electric power... | 07/22/2008 |
| 7231959 | Vehicle energy management system A vehicle energy management system relying on the principle of reallocation of existing resources provided by the vehicle manufacture. Engine belt or engine direct driven components are replaced with electrical motors. Since replacement of the main fan unit would in... | 06/19/2007 |
| 6661193 | Stepping motor driving apparatus with dynamic torque control A stepping motor driving apparatus with dynamic torque control includes a motor controller, a motor driver, and a frequency-to-voltage converter. In practice, the clock signals are sent to the motor driver and the frequency-to-voltage converter. When the ... | 12/09/2003 |
| 5655054 | Motor speed detecting device A device for detecting the speed of a plural-phase motor in which a speed deviation occurring every m periods is eliminated, to provide a speed detection signal high in accuracy at low cost. The motor speed detecting device in which, among drive signals d... | 08/05/1997 |
| 5563980 | Brushless DC motor speed controller Provided is a brushless DC motor speed controller in which the speed feedback signal needed for speed control is obtained from the commutation signals generated by the magnetic-pole sensor in the brushless DC motor. The-brushless DC motor speed controller... | 10/08/1996 |
| 4955431 | Cooling device for an internal combustion engine and method for controlling such a cooling device A device and method for cooling an internal combustion engine is disclosed in which a simple control circuit constructed of relatively inexpensive components enables the rotational speed of an electric motor employed in the cooling device to be controlled... | 09/11/1990 |
| 4918743 | Circuit for generating a dual purpose control signal in a disk apparatus A magnetic or optical disk apparatus featuring a circuit for generating a dual implication MOTOR STATUS signal in response to a MOTOR SPEED signal representative of the speed of rotation of a disk drive motor and to a MOTOR ON signal dictating the rotatio... | 04/17/1990 |
| 4816723 | Variable speed motor control method and apparatus A motor control method and apparatus employing a speed control loop and a phase control loop, each of which receives a clock signal (F-- TACH) indicative of the motor's measured phase and rotational frequency, and a synchronizing clock signal (... | 03/28/1989 |
| 4814679 | Motor speed control A motor speed control applicable to an optical disk device and others includes a frequency converter for digitally comparing the frequency of a target speed signal and that of an actual speed signal. The outputs of the frequency converter are individually... | 03/21/1989 |
| 4752723 | Chopper control system A chopper control system for a vehicle driven by a shunt motor. The system is provided with an integrating circuit for generating a command value for the voltage which is to be supplied to an armature of the motor in accordance with the difference between... | 06/21/1988 |
| 4710825 | Disc recording system with speed control A system for recording information on an information recording disc such as a magnetic or optical disc. The recording system includes velocity control means for controlling the disc at a predetermined rotation velocity and synchronizing signal phase shift... | 12/01/1987 |
| 4653040 | Disk size detecting circuit In a disk size detecting circuit, the size of a disk is determined according to the speed of a motor adapted to rotate the disk and the angle through which motor has rotated after the start thereof. A counter, which is reset with the signal which starts t... | 03/24/1987 |
| 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 |
| 4622500 | Electric motor controller Apparatus is provided comprising a motor having a current applied therethrough. The speed of the motor is a function of the current passing through the motor. An error signal is produced representative of the difference between the motor speed and a selec... | 11/11/1986 |
| 4568193 | Intermittent low speed control for motor operated appliance A food preparation appliance including a housing, an electric motor supported in said housing and adapted to receive alternating current. A tachometer senses rotation of said electric motor and feeds a tachometer signal to a frequency to voltage converter... | 02/04/1986 |
| 4554492 | Motor control system A system is provided for increasing the control accuracy of a motor 12 which feeds back a signal to a motor control circuit 14. The motor control circuit output 20 provides a command voltage to the motor winding. The motor control circuit 14 has an input ... | 11/19/1985 |
| 4541023 | Resolver with sequential frequency and phase correction Apparatus for adjusting the speed of an audio tape capstan to a speed such that an audio tone prerecorded on the tape corresponds to a reference frequency, the apparatus thereafter phase locking the frequency of the audio tone to the reference frequency. ... | 09/10/1985 |
| 4525658 | Servomotor drive system Herein disclosed is a drive system for a servomotor for use with the carriage of a serial printer, comprising a source of a variable command signal representative of the speed at which the servomotor is to operate, detecting means for detecting the output... | 06/25/1985 |
| 4511830 | Servo control apparatus A frequency-voltage converting system has a first sampler for sampling the input signal at a predetermined time interval, a second sampler for sampling the input signal after elapse of a predetermined time period from said predetermined sampling time, and... | 04/16/1985 |
| 4510423 | Motor apparatus A motor apparatus includes a motor, a first circuit for sensing a back electromotive force of the motor to provide a first signal, a second circuit for sensing a rotation speed of the motor to provide a second signal, a third circuit responsive to the fir... | 04/09/1985 |
| 4473783 | Motor control circuit A current limiting circuit, for a serial commutator motor, that monitors the flow of current through resistances chosen to model the motor, rather than the noisy flow of current through the motor itself. Current for one of the modeling resistances is deri... | 09/25/1984 |
| 4471281 | Digital control device A digital control device includes a first controller which generates a control reference signal of a first controlled variable of a controlled system, a first frequency converter which converts said control reference signal into pulses of a frequency prop... | 09/11/1984 |
| 4456859 | Sewing machine drive motor control system A speed-control circuit for a motor of the sewing machine is disclosed. The circuit includes a controller, thyristors for controlling the rotation of the motor in dependence upon the operation of the controller, operational amplifiers activated in depende... | 06/26/1984 |
| 4412158 | Speed control circuit for an electric power tool A method and apparatus for controlling the rotational speed of an electronically controlled power tool in both the forward and reverse direction. When the reversing switch is placed in the reverse direction, the electronic speed control circuit automatica... | 10/25/1983 |
| 4338640 | Speed control system for a multiple speed tape recording and reproducing apparatus A tape speed control system for a multiple speed tape recording and reproducing apparatus comprising a transducer head for reproducing a tape speed indicative signal which has been recorded along an edge of a recording tape. The frequency of the reproduce... | 07/06/1982 |
| 4315200 | Servo control apparatus A frequency-voltage converting system has a first sampler for sampling the input signal at a predetermined time interval a second sampler for sampling the input signal after elapse of a predetermined time period from said predetermined sampling time, and ... | 02/09/1982 |
| 4307326 | Drive system for a motor Disclosed is a drive system for a motor, wherein a current proportional to a change of a load of a motor is sensed by a sensing resistor. A voltage produced across the sensing resistor controls an electronic switch in a manner that the output DC voltage o... | 12/22/1981 |
| 4303873 | Reset windup limiting A proportional control system for controlling a condition at a setpoint is disclosed wherein the system has reset for substantially reducing system droop and incorporates reset windup limiting, the system having a setpoint apparatus for establishing the s... | 12/01/1981 |
| 4254368 | Apparatus for driving a motor In an apparatus for driving a motor wherein a carrier or stage carrying a sample thereon is located and moved to a predetermined position by controlling the slow-up and slow-down speed of the motor at the start and prior to the stopping thereof, respectiv... | 03/03/1981 |
| 4199800 | Brushless DC tachometer A brushless tachometer is disclosed which provides a DC output voltage which is a direct function of an instrumented shaft's rotational velocity. The DC voltage is bi-directional, changing sign when the shafts direction of rotation is reversed. The disclo... | 04/22/1980 |
