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公开(公告)号：US4356542A
公开(公告)日：1982-10-26
申请号：US242788
申请日：1981-03-11
CPC分类号： H02M3/3378
摘要： A digital controller includes a digital feedback circuit for use in generating a pulse-width modulated control signal. The signal is derived from binary signals representing a standard pulse-width signal for the rated output of the power supply plus a correction pulse-width signal reflecting the change in the output level of the power supply. Logic circuits alter the correction pulse-width signals to provide a balancing correction. Soft start operation of the power supply together with a selection of operating clock frequencies are also provided.
摘要翻译： 数字控制器包括用于产生脉冲宽度调制控制信号的数字反馈电路。 该信号来自表示用于电源的额定输出的标准脉冲宽度信号的二进制信号，以及反映电源的输出电平变化的校正脉冲宽度信号。 逻辑电路改变校正脉冲宽度信号以提供平衡校正。 还提供了电源的软启动操作以及选择的工作时钟频率。
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公开(公告)号：US4798945A
公开(公告)日：1989-01-17
申请号：US8793
申请日：1987-01-30
CPC分类号： G06K13/08
摘要： A grabber mechanism for use in a badge rader having a pivoted lever bar with a solenoid attached to one end and a grabber foot assembly attached to the other. When the solenoid is energized, the lever bar is pivoted such that the grabber foot assembly is moved away from a fixed partition which defines a throat in the badge reader, allowing a card to be inserted into the throat. When the solenoid is de-energized, the grabber foot assembly is urged by a spring into contact with the card, trapping the card between a rubber foot of the grabber assembly and the fixed partition sot that the card may be read by the badge reader.
摘要翻译： 用于具有枢转杠杆的徽章放大器的抓取机构，其具有连接到一端的螺线管和连接到另一端的抓取器脚组件。 当螺线管通电时，杆杆枢转，使得抓取脚组件远离固定的分隔件，该固定分隔件在徽章读取器中限定了喉部，允许卡插入喉部。 当螺线管断电时，抓钩脚组件被弹簧推动以与卡接触，将卡夹在抓取器组件的橡胶脚和固定分隔件之间，卡可由徽章读取器读取。
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公开(公告)号：US4757418A
公开(公告)日：1988-07-12
申请号：US8801
申请日：1987-01-30
申请人： Ronald L. Bruckner
发明人： Ronald L. Bruckner
CPC分类号： H01H47/043 , B29K2827/18 , B29L2023/003 , B29L2031/7534
摘要： A solenoid driver circuit having a power supply, a capacitor connected to the power supply, a current pump which oscillates between the on and off condition to charge the capacitor from the power supply, a voltage limiting circuit which limits the voltage of the charge on the capacitor, a solenoid connected to the capacitor and, a solenoid switch which, when activated, closes such that the charged capacitor discharges through the solenoid. After the capacitor is discharged, holding current is supplied to the solenoid from the power supply. The current pump is held off while the solenoid switch is closed so that the current pump will not attempt to charge the capacitor while holding current is being supplied to the solenoid.
摘要翻译： 一种螺线管驱动电路，具有电源，连接到电源的电容器，在导通和关断状态之间振荡的电流泵，用于从电源对电容器充电;限压电路，其限制电源的电压 电容器，连接到电容器的螺线管和螺线管开关，其在被激活时闭合，使得充电的电容器通过螺线管放电。 在电容器放电之后，从电源向螺线管提供保持电流。 当电磁阀开关关闭时，电流泵被关闭，因此电流泵不会在向电磁阀提供保持电流的同时尝试对电容器充电。
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公开(公告)号：US4071877A
公开(公告)日：1978-01-31
申请号：US627736
申请日：1975-10-31
CPC分类号： H01F7/1877 , B41J9/44 , H01F7/1883
摘要： A circuit provides means for driving a load under control of a plurality of signals including a drive timing signal which is given a maximum permissible duration by the circuit to prevent damage to the load, an operating signal, and an inhibit signal which prevents operation in case of excessively low power supply voltage. A power supply of opposite polarity is connected to the load so that the load rapidly dissipates its energy into said power supply at the time of turn-off of the drive circuit.
摘要翻译： 电路提供用于在多个信号的控制下驱动负载的装置，包括通过电路给予最大允许持续时间的驱动定时信号，以防止对负载的损坏，操作信号和防止操作的禁止信号 电源电压过低。 相反极性的电源连接到负载，使得负载在驱动电路关断时将其能量快速耗散到所述电源中。
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