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1.发明授权
公开(公告)号：US4733158A
公开(公告)日：1988-03-22
申请号：US898713
申请日：1986-08-21
CPC分类号： H02P13/06
摘要： A tap-switching circuit for automatically controlling the output voltage of a multi-tap transformer in response to a varying input line voltage and/or system load current demand, includes voltage sensing circuitry in parallel with both the transformer voltage outputs and a voltage comparator for sensing changes in the system load demand requirements. A voltage reference is provided for automatically generating a pre-selected voltage reference level signal for the line and/or system load requirements. Voltage comparison circuitry is operatively connected with the voltage sensing circuitry for generating an enable signal whenever the input line voltage and/or system load current demand requirements sensed by the voltage sensing circuitry falls below the pre-selected voltage reference level signal. A switching circuit is operatively connected to the voltage comparison circuitry, a linear regulator and to at least two taps of the multi-tap transformer for connecting the higher voltage tap to supply a pre-regulator voltage to the linear regulator whenever the enable signal is present, and for disconnecting the higher voltage tap from supplying its pre-regulator output voltage whenever the enable signal is absent.
摘要翻译： 用于响应于变化的输入线电压和/或系统负载电流需求而自动控制多抽头变压器的输出电压的抽头开关电路包括与变压器电压输出并联的电压感测电路和用于 感测系统负载需求需求的变化。 提供了一个参考电压，用于自动生成用于线路和/或系统负载要求的预选电压参考电平信号。 电压比较电路与电压感测电路可操作地连接，只要由电压感测电路感测到的输入线路电压和/或系统负载电流需求量低于预先选择的电压参考电平信号，就产生使能信号。 切换电路可操作地连接到电压比较电路，线性调节器和多抽头变压器的至少两个抽头，用于连接较高电压抽头，以便每当存在使能信号时，向线性稳压器提供预调节器电压 并且每当使能信号不存在时，用于断开较高电压抽头以提供其预调节器输出电压。
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公开(公告)号：US3961336A
公开(公告)日：1976-06-01
申请号：US579460
申请日：1975-05-21
IPC分类号： G01D15/08
CPC分类号： G01D15/08 , Y10T29/49002
摘要： An improved printer embodiment that includes a print head having thin "foil" electrodes and associated spacers fashioned to maintain very precisely controlled dimensions and positioning according to specific, improved fabrication techniques providing an exactly oriented row of spaced, aligned electrodes. Each electrode includes an integral "print-finger" adapted to resiliently skid over the passing print-substrate and, preferably, also including a companion contact adapted to engage an associated conductor terminal.
摘要翻译： 一种改进的打印机实施例，其包括具有薄的“箔”电极和相关联的间隔物的打印头，所述打印头形成为根据提供精确取向的间隔开的排列的电极的行的特定的改进的制造技术来维持非常精确的受控尺寸和定位。 每个电极包括适于在通过的印刷基板上弹性地滑动的整体的“印刷指”，并且优选地还包括适于接合相关联的导体端子的伴随接触。
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公开(公告)号：US5386772A
公开(公告)日：1995-02-07
申请号：US77289
申请日：1993-06-15
摘要： A high speed media management device has tractor means for moving a web through the device past a plurality of work stations at each of which the web may be treated. Relatively high web tension is maintained throughout its travel path. Counting means near the beginning of the web path generate a count signal with the passage of each increment of web. The accumulated count signals are compared to numbers stored in a plurality of registers, each register associated with a work station and each containing a count representative of web travel distance relative to the work station. The first register count corresponds to the distance required to accelerate the web from a stop. The remaining registers store that count and a separate count representing the distance between the first station and the corresponding station. When the counter contents equals the count in a register, an actuating signal initiates a treatment activity at the associated work station. At predetermined intervals thereafter, additional actuating signals generated and applied.
摘要翻译： 高速媒体管理装置具有牵引装置，用于通过装置移动网通过多个工作站，每个工作站可以对其进行处理。 在其行进路径上保持相对较高的卷材张力。 网路路径开始附近的计数意味着每个网页增量都会产生一个计数信号。 将累积的计数信号与存储在多个寄存器中的数字进行比较，每个寄存器与工作站相关联，并且每个寄存器包含相对于工作站的代表web行进距离的计数。 第一个寄存器计数对应于从停止加速网络所需的距离。 剩余的寄存器存储该计数和表示第一站和相应站之间的距离的单独计数。 当计数器内容等于寄存器中的计数时，致动信号在相关联的工作站发起处理活动。 此后，以预定的间隔产生并施加附加的致动信号。
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公开(公告)号：US4635075A
公开(公告)日：1987-01-06
申请号：US804543
申请日：1985-12-04
CPC分类号： B41J2/345
摘要： An improved thermal printhead is disclosed which includes a plurality of addressable electrodes, each corresponding to a spot to be printed. In alternative embodiments, a single common electrode or a plurality of common electrodes are located in a plane below that of the addressable electrodes and are separated therefrom by an insulating layer. A portion of the common electrode is left exposed in the vicinity of each of the addressable electrodes and a covering of thermal resistive material electrically interconnects the two types of electrodes. Passage of a current through an addressable electrodes result in a current flow to the nearest points on a common electrode causing local heating in the resistive material. The electrode arrangement permits printing closer to the edge of the printhead and further, enables smaller, more clearly spaced printed "dots".
摘要翻译： 公开了一种改进的热打印头，其包括多个可寻址电极，每个可寻址电极对应于要打印的点。 在替代实施例中，单个公共电极或多个公共电极位于可寻址电极的平面以下的平面中，并通过绝缘层与其分离。 公共电极的一部分在每个可寻址电极附近露出，并且热电阻材料的覆盖物使两种类型的电极互连。 电流通过可寻址电极的通过导致电流流向公共电极上的最近点，引起电阻材料中的局部加热。 电极布置允许打印更接近打印头的边缘，并且还允许更小，更清晰间隔的打印的“点”。
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公开(公告)号：US5359915A
公开(公告)日：1994-11-01
申请号：US73897
申请日：1993-06-09
申请人： Mark A. Hitz
发明人： Mark A. Hitz
CPC分类号： B26D7/2614 , B26D1/385 , Y10T83/4827 , Y10T83/4847 , Y10T83/8778
摘要： A high speed web cutter has a rotating roller with an extended bar mounted perpendicular to its surface and angled to be aligned askew with respect to the roller's axis. During the rotation of the roller, the bar interferingly contacts a plate having an angled edge that is mounted on a relatively stiff cantilever spring. The bar edge and the plate edge are not mounted parallel with each other nor are either of them parallel with the plane of the web. As the roller rotates, the extended bar deflects the cantilever spring, allowing the edges to intersect in a cutting intersection that travels axially with roller rotation, thereby severing a web member passing between the roller and the plate edge.
摘要翻译： 高速卷筒切割机具有旋转辊，其具有垂直于其表面安装的延伸杆，并且相对于辊的轴线倾斜成对准。 在辊的旋转期间，杆干涉地接触具有安装在相对刚性的悬臂弹簧上的成角度边缘的板。 杆边缘和板边缘彼此不平行地安装，也不平行于腹板的平面。 当滚筒旋转时，延伸杆使悬臂弹簧偏转，允许边缘在与滚子旋转轴向移动的切割交叉中相交，从而切断通过辊与板边缘之间的腹板构件。
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公开(公告)号：US4093847A
公开(公告)日：1978-06-06
申请号：US668470
申请日：1976-03-19
申请人： John A. Walker , Dimitri S. Dimitri
发明人： John A. Walker , Dimitri S. Dimitri
CPC分类号： F24H1/106 , F24H9/1818 , F24H9/2028 , G05D23/1906 , G05D23/24
摘要： An electric fluid heater of the type in which the fluid is heated by passing electricity through it includes an electronic temperature control system responsive to a temperature sensor in the fluid for controlling the flow of electric current to the heating electrodes. The electronic controller includes means to limit the maximum current passed by the heating electrodes. Heat generated is controlled to demand by varying the duty cycle of back-to-back SCR's in series with one of the electrodes.
摘要翻译： 通过使电流通过流体被加热的类型的电流体加热器包括响应于流体中的温度传感器来控制到加热电极的电流的电子温度控制系统。 电子控制器包括限制由加热电极通过的最大电流的装置。 产生的热量通过改变与其中一个电极串联的背靠背SCR的占空比来控制需求。
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公开(公告)号：US3983359A
公开(公告)日：1976-09-28
申请号：US504814
申请日：1974-09-10
申请人： John A. Walker , Dimitri S. Dimitri
发明人： John A. Walker , Dimitri S. Dimitri
CPC分类号： F24H1/106 , G05D23/1906 , G05D23/24
摘要： An electric fluid heater includes a metallic container defining a heating chamber provided with a pair electrodes for passing electric current through the fluid for heating the fluid. The container has a fluid input port, a fluid output port and a safety port all communicating with the heating chamber. The ports have a reduced aperture portion of a substantial length to increase the resistance of the current leakage path from the electrodes to external ground connections. All surfaces of the metallic container including the fluid contacting surfaces of the heating chamber and ports are covered by an electrically insulative coating. An external pressure relief valve is connected to the safety port.
摘要翻译： 电动流体加热器包括限定加热室的金属容器，该加热室设置有用于使电流通过用于加热流体的流体的电极。 容器具有流体输入端口，流体输出端口和与加热室连通的安全端口。 端口具有相当长度的减小的开口部分，以增加从电极到外部接地连接的电流泄漏路径的电阻。 包括加热室和端口的流体接触表面的金属容器的所有表面被电绝缘涂层覆盖。 外部泄压阀连接到安全口。
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公开(公告)号：US4688742A
公开(公告)日：1987-08-25
申请号：US705881
申请日：1985-02-26
申请人： Adam J. Hettich
发明人： Adam J. Hettich
CPC分类号： G11B15/26 , G11B23/08778
摘要： A strip media tensioning system is set forth for imposing drag on a moving band such as a circulating endless belt for driving reel packs for delivery of magnetic tape therebetween. More particularly, an apparatus is set forth which includes a fixed shaft. A sleeve is journalled for rotation about the shaft, the endless belt engaging and rotating the sleeve. To create drag, a visco-elastic ring is positioned between the shaft and sleeve and is compressed against the sleeve creating drag by an eccentrically disposed roller device. The eccentricity of the roller device is adjustable for altering the drag on the circulating endless belt.
摘要翻译： 提出了带状介质张紧系统，用于在诸如循环环形带的移动带上施加阻力，用于驱动用于在其间输送磁带的卷筒组。 更具体地，提出了一种包括固定轴的装置。 一个套筒被安装在轴上以便旋转，环形带接合和旋转套筒。 为了产生阻力，粘弹性环位于轴和套筒之间并且被压靠在套筒上，由偏心设置的辊装置产生阻力。 辊装置的偏心度是可调整的，用于改变循环环形带上的阻力。
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