摘要:
A process for manufacturing a composite profile based on a thermoplastic organic material reinforced by reinforcing fibres includes making a multiplicity of continuous reinforcing yarns come into contact with a thermoplastic organic material and shaping the composite profile. Continuous yarns based on continuous glass fibres and on a first thermoplastic are brought together to be parallel and at least one consolidated tape is formed by heating them, in which tape the reinforcing fibres are impregnated with the first thermoplastic. The at least one tape is introduced into a die sized to the cross-section of the profile and at least one second molten thermoplastic organic material is simultaneously introduced into the die in contact with the tape, to obtain a profile of at least one second thermoplastic organic material reinforced by the at least one tape.
摘要:
An AC line voltage regulator having a cross-coupled memory circuit that interlocks up and down counter logic channels in a manner that successive stepping in the same direction is accomplished in half-cycle steps, while oscillatory stepping between two adjacent ranges is limited to full cycle steps to prevent any DC component in the regulated output. An alternate circuit uses a dual gating circuit in a bi-directional counter to achieve the same regulation characteristics.
摘要:
An energy convertor for generating a power output waveform that contains a fundamental sine wave and a controlled amount of the third harmonic wave to eliminate the sinusoidal peaks and to provide a desired flat top at reduced amplitude. The synchronized generation of the third harmonic is achieved in combination with a new inductor that enhances the harmonic in the magnetic path around the inductor.
摘要:
An AC line voltage regulator having a voltage sensing circuit for sensing and producing signals representative of the difference between a predetermined voltage level and the line voltage level and a load current sensing circuit for sensing and producing a signal representative of the magnitude of a load current drawn from the regulator. An actuation circuit combines the signals produced by the voltage and current sensing circuits to control the timing of a selectively switchable dispensing circuit which dispenses energy into an oscillatory circuit oscillating at the line voltage frequency and connected between input and output ports of the regulator. The dispensing circuit permits a selectable amount of energy to be dispensed in the oscillatory tank to adjust the line voltage level by adding the energy to either buck or boost the line voltage as determined by the difference signal. The magnitude of the dispensed energy is determined by combining the line voltage and load current signals to produce an activating signal, which permits the dispensing circuit to add energy at a predetermined rate for a period of time determined by the activation signal.
摘要:
A pouch for tobacco with revertable pockets, wherein the pouch comprises a first pocket comprising a front wall, a back wall, a first opening and a flap formed by an elongated part of the back wall to close the first opening; a second pocket comprising a front wall, a back wall and a second opening; wherein the first and the second pocket are connected to each other along a reverting line such that the first pocket and the second pocket are foldable relative to each other along said reverting line in order to revertably oppose the front walls of the first and second pocket or to oppose the back walls of the first and second pocket.
摘要:
A process for manufacturing a composite profile based on a thermoplastic organic material reinforced by reinforcing fibres includes making a multiplicity of continuous reinforcing yarns come into contact with a thermoplastic organic material and shaping the composite profile. Continuous yarns based on continuous glass fibres and on a first thermoplastic are brought together to be parallel and at least one consolidated tape is formed by heating them, in which tape the reinforcing fibres are impregnated with the first thermoplastic. The at least one tape is introduced into a die sized to the cross-section of the profile and at least one second molten thermoplastic organic material is simultaneously introduced into the die in contact with the tape, to obtain a profile of at least one second thermoplastic organic material reinforced by the at least one tape.
摘要:
An apparatus for AC line voltage regulation has an input port for connection to an AC source, an output port for connection to a load, and a transformer assembly connected between the input and output ports. The transformer assembly comprises a buck/boost winding and a primary winding wound about a common transformer core, and a switch arrangement for controlling the connection of the primary winding in circuit with the buck/boost winding. The switch arrangement is controlled by switch actuators responsive to a voltage sensor assembly to connect the primary winding in either of two possible conditions when the voltage is outside predetermined limits. The transformer assembly comprises either a step down transformer for reducing or bucking the output voltage or a step up transformer for boosting the output voltage according to the condition of the switch arrangement. The primary may comprise separate windings controlled by the switching assembly for connection in different configurations.
摘要:
A circuit for determining on a half-wave cycle basis the maximum and minimum voltages of input cyclic line voltages for selected time periods in which the line voltages are rectified to half-waves, and an integrating voltage to frequency converter provides output pulses proportional to the voltage magnitudes of the half-waves with the pulses being counted and placed in a memory and then compared with minimum and maximum previous counts for previous half-waves, to provide an updated minimum and maximum voltage for such half-waves over a period of time or period of half-waves, with provisions for providing resetting strobe pulses at zero voltages of the half-waves and for providing accurate measuring of the pulse outputs in the integrating voltage to frequency converter by modulating the integrator sense voltage and achieving substantially accurate compensation for the effects of timing errors in the V/F converter.
摘要翻译:一种用于基于半波周期确定输入循环线电压的最大和最小电压的电路,其中线电压被整流为半波,并且积分电压与频率转换器提供与 半波的电压幅度被脉冲计数并放置在存储器中,然后与先前半波的最小和最大先前计数进行比较,以在一段时间内为这种半波提供更新的最小和最大电压 或半波周期,其规定用于在半波的零电压下提供复位选通脉冲,并通过调制积分器感测电压并提供对积分电压到频率转换器的脉冲输出的精确测量,并实现对 V / F转换器中定时误差的影响。
摘要:
An assistive mobility device is provided that includes an automatic positive locking system, which permits an operator to move the assistive mobility device when an actuator is engaged and automatically lock the assistive mobility device when the actuator is disengaged. The assistive mobility device includes a braking system, stowable footrest and armrests, and an adjustable back, which all require the single-handed operation of the operator to function. The collapsible footrest is stowed under the seat permitting an occupant optimal entry into or exit from the assistive mobility device. The assistive mobility device can be formed from non-corrosive materials, including stainless steel, composite fibers, nylon, and plastics, for use in aquatic environments.
摘要:
A simplified system of recording and displaying input data signals having a multi-stage memory that provides a given magnitude output signal to a meter or recorder for each memory stage energized, with said memory having a stage, magnitude discriminator circuit, and a scaling network for interfacing signal inputs to appropriate memory stages, with a timer for resetting the memory stages to provide an update readout periodically to the meter, and with a direct display for displaying the particular memory stages that are energized, providing a direct display readout of the meter readings.