Abstract: A drive circuit of a two-laminated electrostriction element, wherein a common junction of two sheets of electric distortion elements is connected to one of the driving power source through a first switching means, and the other terminal of the one electrostriction element is connected to the other of said driving power source, with the other terminal of the other electrostriction element being connected to a second switching means, thereby to rotate the other electrostriction element by the voltage charged in the one electrostriction element.
Abstract: A switching circuit for supplying electric power to a load from a power source includes a first relay device having a first switch and a semiconductor switching element connected in series with the first switch, power source and load. A second relay device is provided which is defined by a second switch connected parallelly to the semiconductor switching element and an actuating switch for enabling and disabling the semiconductor switching element. The second relay device is so arranged as to effect the make of the actuating switch and second switch in said order and to effect the break of the same in the opposite order. A delay circuit is provided for controlling the first and second relay devices such that when supplying a current to the load, the first and second relay devices are turned on in said order so that the first switch, the actuating switch and the second switch are turned on in said order.
Abstract: In compact card-like equipment having an IC chip and a power source cell, an equipment case has a multilayered structure of a pair of upper and lower sheets and a pair of upper and lower panels laminated on a frame, respectively. A flexible substrate and a paper-like cell as a primary cell are provided in the equipment case. The paper-like cell has a pair of positive and negative electrode sheets and a power generating unit interposed therebetween. A sealing member seals the peripheries of the electrode sheets of the paper-like cell. The paper-like cell is received in a receptacle space formed in the frame. The flexible substrate is received in another receptacle space formed in the frame. The electrode sheets of the paper-like cell are electrically connected to terminals of the flexible substrate by means of a film-like connecting member. This compact card-like electronic equipment such as a calculator is thin and compact in size.
Abstract: A power-up sequencing apparatus for successively energizing a plurality of associated subsystems in a host system, including a series of interconnected sequencing circuits, each sequencing circuit interconnected with a subsystem and including first switching means responsive to an initial system power-up for disabling its associated subsystem; second switching means responsive to an initial system power-up for suppressing the start command to the next sequencing circuit in the series; and third switching means responsive to a start command for operating the first switching means to enable its associated subsystem and for operating the second switching means to introduce a start command to the next sequencing circuit in the series.
May 16, 1986
Date of Patent:
April 5, 1988
Denning Mobile Robotics, Inc.
Raymond Pavlak, Jr., Robert W. George, II
Abstract: Resistance of a thermal head is stored as a digital signal in a head resistance memory. Output according to data in the head resistance memory is calculated by a head voltage calculation circuit for storing a correlation between resistance of the thermal head at a fixed normal temperature and supply voltage. The output from the head voltage calculation circuit is converted by a D/A converter to a reference voltage, which is then fed to a constant-voltage power source for applying the supply voltage to the thermal head, so that an optimum supply voltage to the thermal head may be automatically set, and temperature of the thermal head generating heat may be maintained constant.
Abstract: An inductive pulse generator for converting a rotary movement into a frequency proportional therewith. The pulse generator includes a measuring wheel (1) provided with poles (3) of magnetic material evenly distributed over the circumference of the measuring wheel. The pulse generator further includes a stator (4) provided with a magnetic core (6) with plate-shaped pole shoes (10) in a coil carrier (8) out of which end portions (12) of the pole shoes (10) project. The end portions (12) face the measuring wheel (1). A coil (7) surrounds the magnet core (6), at which coil (7) a pulsating voltage can be picked off with a frequency proportional to the number of revolutions of the measuring wheel (1), outside the area of the pole shoe (10) end portions (12) facing the measuring wheel (1). The thickness of the pole shoes (10) is increased by additional magnetic material (11) so as to increase the pulsating voltage which can be picked off at the coil (7).
Abstract: Multi-time delay power controller apparatus for providing time-delayed power or control signals to associated electrical equipment, such as computers and disc drives, comprises a power stage configured for connecting to a conventional power outlet, a D.C. power supply connected to an interval D.C. voltage bus, an output stage having a plurality of time delayed outputs and a plurality of time delay timing stages connected in electrical series to one another between the D.C. voltage bus and ground. Each such timing stage includes a timing means, and a normally open control relay. Coils of odd numbered timing stages are connected to ground and of even numbered stages to the D.C. voltage bus. The timing stages are connected so that the timing out of one stage starts the timing of the next-in-sequence stage, timing of the first-in-sequence timing stage being started when the apparatus is turned on.
October 1, 1985
Date of Patent:
January 12, 1988
Pulizzi Engineering, Inc.
John D. Pequet, Michael B. Pulizzi, Roger Cook
Abstract: The present invention provides a power supply for a digital light controller which is placed in a wall box where the neutral line cannot be used. The invention uses two separate and different kinds of power supplies that are placed in series with the load and the digital light controller depends on the power supply 1 when the load is off and on the second power supply when the load is on. The supplies are alternately switched when either the remote control or a manual switch is triggered. The first power supply uses a switch that is either opened or closed to develope a voltage drop of V or 0 and the second supply uses diodes back to back to develop a voltage drop which can be stepped up and rectified to a DC voltage for powering the digital light control.
April 8, 1986
Date of Patent:
December 29, 1987
Chamberlain Manufacturing Corporation
Colin B. Willmott, Carl T. Heitschel, Bernard J. Wojciak, Jr.
Abstract: A system for rapidly detecting power disturbances with ferroresonant transformers having a decay profile comprising the steps of rectifying a power signal; comparing the rectified signal against a reference signal; comparing the rectified signal against a dynamic reference signal; and generating a power-fail signal in response to either comparison falling below its respective reference.
Abstract: A battery charging protection circuit for use in a power controller circuit utilizes the base emitter junction of a first NPN bipolar transistor to permit current to flow only from a backup battery input terminal to a power supply voltage output terminal of the power controller circuit. The base emitter junction and base collector junction of a second bipolar transistor are used to permit current to flow only in the direction from the backup battery input terminal to the substrate of the power controller circuit.
Abstract: A saturable inductor switch. The switch includes a number of spaced cores disposed adjacent one another with each core being made of ferromagnetic material. An insulative layer is disposed about each core and each core has an electrical winding about the insulative layer for that core. Each winding has a first end and a second end and is electrically connected to its respective core intermediate the ends. The windings are connected in series. All the cores have substantially the same size and shape, and all windings have substantially the same number of turns.
Abstract: A continuous power source operating as an uninterruptible power supply functions as an on-line power management device for output loads such as computers. During normal power flow operation, alternating current power passes from a conventional AC line power input through a power line filter and a power monitor and phase shift circuit to output terminals coupled to the load. The power monitor circuitry provides control signals for synchronizing the frequency and phase of a sine wave generator, the output of which is coupled to a normally inoperative static inverter as the control signal for controlling the frequency and phase of operation of such static inverter. The output of the static inverter is coupled to the load terminals through a transformer. If the voltage of the line alternating current signal falls outside a predetermined window, the power monitor switches off power from the line to the load terminals and enables the static inverter for operation.
Abstract: A control circuit of a direct current servomotor which constantly rotates a floppy disk. A drive pin is connected to a motor shaft of the direct current servomotor, and the floppy disk is driven to rotate at a such state that engagement of the drive pin with a drive hole of the floppy disk chucks up the floppy disk on the servomotor. The direct current servomotor consists of a brushless motor that hall devices detect its magnet pole position and choose among the excited phases of the stator coils. The motor rotates to the reverse direction at the start-up by means of inversion of the input electric current flow to the hall devices in a short while and change-over of the magnet pole detecting direction. The reverse rotation at the motor start-up moves the drive pin on to the rear end of the drive hole, and the subsequent normal rotation firmly starts up the motor.
Abstract: A drive circuit is provided for a bidirectional DC inductive motor, as may be used for automotive window wipers and the like. Four power MOSFETS are connected in an H-bridge configuration with the motor and a DC source. A pair of input terminals receives respective direction-controlling logic signals. Respective intermediate switching circuits are connected between each input terminal and the high-side and low-side power MOSFETS connected to the same motor terminal for controlling those two power MOSFETS in a complementary manner. A braking signal may also be applied to the input terminals. A third terminal receives a pulse-width modulated control signal and extends it, via appropriate circuitry, to an appropriate one of the low-side power MOSFETS for speed regulation. The values of certain components of the drive circuitry are selected to minimize cross-conduction between certain power MOSFETS and to optimally accommodate the inductive effects of the motor and leads.
Abstract: A switch control device for controlling a plurality of switches for actuating apparatuses of a motor vehicle, respectively, including at least one stop mode switch allowed to be operated only in a stop state of the motor vehicle and at least one running mode switch allowed to be operated in a running state of the motor vehicle and provided separately from the stop mode switch such that input operation of the stop mode switch and the running mode switch is regulated on the basis of whether the motor vehicle is in the stop state or in the running state.
Abstract: A control device includes an electrically contactless depluggable logic module such as a computer that is used to interface between a power supply and input and output elements to process a system of control signals. There are no electrical connections to the logic module. This eliminates electromagnetic interference and conducted line interference. The power supply is magnetically coupled to the logic module. Information and control signals are optically coupled to the logic module. It is a free standing, environnmentally immune unit, electrically isolated from the outside world.
Abstract: A propulsion control system for motor vehicles in the range of the cornering limit speed, having a memory in which the momentary steering angle value is stored when a certain steering angle change is not followed by a change of the lateral acceleration, having threshold value comparators in which the actual steering angle is compared with threshold values that depend on the stored steering angle value, and having logic for transmitting and stop transmitting a signal to a control element for the power reduction of the vehicle engine when the actual steering angle exceeds one threshold value and then falls below the other threshold value. The steering angle may also be replaced by the driving speed or by a combination of both quantities.
Abstract: A transport and stacker system in which the articles being transported are propelled in their path of travel by the moving magnetic field of a linear induction motor. The magnetic field also functions to attract the moving articles toward the linear motor and in order to overcome this attracting force and air bearing is provided. The air pressure acting against the attracting force is just sufficient to move the articles a slight distance away from the linear induction motor so that the articles move in the path of travel while suspended in air out of contact with the physical surface of the motor. When the desired position is reached, the article is dropped on a stack by deenergizing the magnetic field.
Abstract: Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the limiting torque of the wind turbine at a selected constant velocity ratio with respect to wind speed and, above the limiting torque, control the rotor tip speed at speeds greater than those dictated by the constant velocity ratio up to a speed or power limit. This may be accomplished by controlling tip speed above the point where limiting torque is attainable to maintain optimal wind turbine performance along the performance envelope.
Abstract: A motor operated valve, typically a butterfly valve driven by .[.a synchronous.]. .Iadd.asynchronous .Iaddend.electric motor (16), is provided with a torque sensing arrangement wherein an cyclic electrical signal representative of the rotational speed of the motor is produced by magnets (22) on disc driven by the motor and Hall effect switches (23,24). The frequency of this signal is compared in a circuit (43) with the frequency of current supplied to the motor to provide an indication of motor torque. Switches (46,47) define preset torque limits for the valve. If the limits are exceeded, a signal is fed to control logic (41) which operates switches (18) to control the supply current to the motor. The speed signal from the Hall effect switches is also fed to a counter (31) to develop a count representative of movement of the valve. The output of counter (31) is compared with preset valves defined by switch circuits (37,38) to define limits of travel for the valve.