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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 6426601 | Power supply system of an electronic switching electric motor for air-conditioning devices to be installed inside the motor vehicles A power supply system of an electronic switching electric motor for air-conditioning devices is described, said power supply system is intended to be installed in the motor vehicles and comprises a solar panel (13), which is an integral part of the vehicl... | 07/30/2002 |
| 6377015 | Voice coil motor control apparatus for use in disk drives Disclosed herein is a system for applying a power-supply voltage to the voice coil control circuit provided in a disk drive and designed to drive the head actuator provided in the disk drive. The power supply circuit of the disk drive outputs a voltage th... | 04/23/2002 |
| 6094020 | Disk drive utilizing Bemf of spindle motor to increase VCM voltage during seeks A disk drive is connectable to a power supply having a fixed DC voltage. The disk drive includes a voice coil motor (VCM) and a spindle motor having a plurality of windings and a rotor rotatable at a variable spin-rate. A spindle motor driver is coupled t... | 07/25/2000 |
| 6049185 | Power circuit of an air conditioner for electric vehicles A power circuit of an air conditioner for electric vehicles includes a high voltage power source, a drive circuit for driving a compressor motor, and a capacitor connected between a positive side coupling and a negative side coupling to the high voltage p... | 04/11/2000 |
| 6048219 | Voltage selection electrical connector An electrical connector for configuring the supply voltage of rotary electric machines, particularly electric motors, having a plurality of electrical windings. The connector includes an electrical terminal block mountable in a bell housing of the rotary ... | 04/11/2000 |
| 6018941 | Electric starter system for turbine aircraft engines Turbine aircraft engine starter systems and controllers for use therewith, and methods of starting turbine aircraft engines are described. A starter is operably connected with an aircraft engine and configured to initiate an engine start cycle which inclu... | 02/01/2000 |
| 5834913 | Method and apparatus for controlling motor rotation, and a disk signal regenerating apparatus using the motor The present invention provides the following rotation control method for reducing energy consumption of a motor driving a disk. In a constant speed mode, a supply voltage V1 for driving the motor at a constant speed N1 is selected; however, at a lower con... | 11/10/1998 |
| 5811953 | Motor driving circuit and method A motor driving circuit coupled to a motor having a plurality of phases of coils includes a standard power source generating a first power supply voltage, and a step-up power source for generating a second power supply voltage greater than the first power... | 09/22/1998 |
| 5801498 | Control system for electric vehicle A motor control device for controlling the driving and regenerative operation of a motor includes CPU, ROM, RAM and a back-up RAM. An electric power is normally supplied from a subsidiary battery through a second regulator to the back-up RAM. An electric ... | 09/01/1998 |
| 5764007 | Micro-processor based motor control integrated circuit including a boost regulated DC-to-DC converter A single chip integrated circuit includes a boost regulated DC-to-DC converter and gate drive circuits integrated on the same die with a micro-processor, along with high density digital logic functions, analog functions, etc. The gate drive circuits are u... | 06/09/1998 |
| 5708340 | Power drive control device of an automatic door A power drive control device of an automatic door, including a gear box having a shell; and a motor drive, the motor drive having a front cover integrally made with the shell of the gear box together, and a back cover covered on the front cover to hold a ... | 01/13/1998 |
| 5659233 | Controller for controlling motor transferring power between a plurality of power sources A motor controller includes a power source VG for driving a motor 1, a power source VRG for regenerating energy generated in the motor 1, and a power converter for transferring energy from the power source VRG to the power source VG. Windings of the motor... | 08/19/1997 |
| 5566219 | X-ray apparatus comprising of a circuit arrangement for accelerating and decelerating the rotary anobe of a rotary-anode x-ray tube The invention relates to an X-ray apparatus, comprising a circuit arrangement for accelerating and decelerating the rotary anode of a rotary-anode X-ray tube in which phase-shifted alternating voltages can be applied to the stator windings of the drive mo... | 10/15/1996 |
| 5534760 | Compressor control circuit A compressor control circuit adapted to a refrigerator comprises a compressor including a brushless DC motor, a power circuit for separating an AC power source from a DC power source to drive the brushless DC motor, a voltage adjustment switching circuit ... | 07/09/1996 |
| 5530332 | Stepper motor drive circuit A drive circuit for a stepper motor intended to drive a load, which circuit is adapted to operate in a chopper drive mode during a motor acceleration phase, and an L/R drive mode during a subsequent cruise phase.... | 06/25/1996 |
| 5488279 | Dual power refrigerator A rotary-compressor control system for electric refrigerators using rotary compressors for cooling the inside of the refrigerators, in which a battery for feeding direct-current power, an inverter power section for converting direct-current (d-c) power fr... | 01/30/1996 |
| 4878006 | Multi-voltage motor and timer clock A motor having a capacitor in series with its coil permits the motor to operate at a higher voltage or range of voltages over its design voltage. A method determines the correct value of a capacitor to change the design voltage of a motor to a different o... | 10/31/1989 |
| 4788480 | Voltage control for battery powered motor or the like A method of control and a control circuit for use in connecting all or sub-parts of a battery supply to a battery driven motor includes relays connected between a motor and each sub-part of a battery supply; a timer having a predetermined time period and ... | 11/29/1988 |
| 4743816 | Microprocessor based motor protective relay with transition control Motor protection relay is taught in which a microprocessor is utilized in conjunction with a reduced voltage motor starter and the electrical motor system which it operates upon to cause the motor to start in stages. The microprocessor-based system infers... | 05/10/1988 |
| 4639646 | Two pedal, three-way control for child's riding toy A child's battery-powered riding toy includes a floorboard with two spring-biased switches that must be closed by the child operator to place the vehicle in self-powered motion and can only be reached simultaneously of the child operator is safely aboard.... | 01/27/1987 |
| 4613802 | Proximity moisture sensor A device for detecting the presence of water includes a capacitance sensor coupled to a windshield to detect capacitance changes. A multivibrator is coupled to the sensor to translate the detected capacitance change to the frequency domain. A phase-locked... | 09/23/1986 |
| 4607198 | Wiper driving apparatus A wiper driving apparatus comprises a speed reduction gear train mounted on a drive shaft of a motor which drives reciprocally and pivotally a wiper blade; a pin member operatively engaged with said gear train so as to move once every rotation of the gear... | 08/19/1986 |
| 4580081 | Computer controlled motor vehicle battery circuit A motor vehicle powered by a DC motor has a pedal which is depressed by the driver to increase speed by actuating a tapping switch which has two sets of moving contacts cooperating with stationary contacts to progressively connect with the motor batteries... | 04/01/1986 |
| 4563621 | Speed control circuit for golf carts and the like A special control circuit for a golf cart or like vehicle powered by a plurality of storage batteries. The batteries are connected circuitwise to a DC motor by speed control contactors to select battery connections in parallel, parallel/series and series ... | 01/07/1986 |
| 4558263 | All terrain vehicle toy with dynamic braking A childs wheeled riding toy of the three wheeled type having a front steerable wheel and a pair of rear motor driven wheels in which the child sits astride of the toy with his feet resting on opposed foot rest positions of the toy is disclosed having a pa... | 12/10/1985 |
| 4490624 | Door control apparatus A fail safe mechanism for power operated doors comprises an auxiliary power supply, an electric motor, a self operating clutch to connect the motor to the door's normal drive assembly and a relay/timer circuit to energize the motor in the event of a mains... | 12/25/1984 |
| 4429935 | Multi-position electrical connector An electrical connector for use with an electric device including first and second winding sections. The connector comprises a plug including a plurality of outwardly extending blades and a socket defining a plurality of receptacles for receiving the blad... | 02/07/1984 |
| 4236103 | Control circuit for a direct current motor A control circuit for a direct current electric motor including a rectifying bridge for supplying the motor with direct current and a regulating circuit including a triac, the energizing angle of which is determined by a capacitor connected in series with... | 11/25/1980 |
| 4129810 | Switching motor control system A switching motor control system that is particularly well suited for the reel motor of a tape transport system includes an energization command system commanding motor energization in response to tape buffer loop length, a feedback system indicating buff... | 12/12/1978 |
| 4075541 | Direct current motor control device for use in battery automobiles A direct current motor control device for use in battery automobiles comprises a direct current motor to be driven by a plurality of battery groups each battery group delivering an equal voltage. The device comprises a battery change-over thyristor circui... | 02/21/1978 |
| 4019106 | Motor speed control A switch for speed control of an electric motor driven vehicle employs a combination of resistance switching, field weakening and voltage switching. A mechanical switch assembly has a speed switch and a voltage switch that are interconnected so that the v... | 04/19/1977 |
| 3984744 | D.C. voltage control system A speed control system for electric vehicles for varying the applied voltage to a series wound traction motor to vary the speed thereof by dividing the main power source into a number of small units, which are then grouped and re-grouped through a series ... | 10/05/1976 |
