公开(公告)号：US4471217A

公开(公告)日：1984-09-11

申请号：US44617

申请日：1979-06-01

申请人： Joseph C. Engel

发明人： Joseph C. Engel

IPC分类号： G06K7/10 ,  G06K7/12 ,  G06K17/00

CPC分类号： G06K7/1092 ,  G06K17/0032 ,  G06K7/12

摘要： An optical reading system employing a commercially available line scanning camera which is sensitive to the ink employed in preprinted document formats. The sensitivity of a line scan camera to the preprinted ink formats is minimized by employing an incandescent document illuminating source, a lens system for the line scan camera which is optimized for use in the near infrared region, and an infrared pass filter positioned between the line scan camera lens system and the document to filter the light reflected from the document.

摘要翻译： 一种光学读取系统，采用市售线扫描照相机，其对以预打印文档格式采用的墨水敏感。 通过采用白炽文件照明源，用于在近红外区域中使用的线扫描照相机的透镜系统以及位于线路扫描照相机之间的红外线通过滤光器，线扫描照相机对预打印墨水格式的灵敏度被最小化 扫描相机镜头系统和文档以过滤从文档反射的光。

公开(公告)号：US4243876A

公开(公告)日：1981-01-06

申请号：US60511

申请日：1979-07-25

申请人： Joseph C. Engel ,  Leonard C. Vercellotti ,  Dale W. Schroeder

发明人： Joseph C. Engel ,  Leonard C. Vercellotti ,  Dale W. Schroeder

IPC分类号： G06K9/40 ,  G06K7/00 ,  G06K7/10 ,  G06K7/14 ,  G06K9/38 ,  H04N1/407

CPC分类号： G06K7/10851

摘要： In a line scan camera system employed to extract information from marks or characters on a document, a memory circuit is used to store the average white and black video output from the camera so that a given white-to-black transition can be compared to adaptive white and black references to compensate for variations in document background light intensity and vignetting associated with the lens of the line scan camera system.

摘要翻译： 在用于从文档上的标记或字符提取信息的行扫描照相机系统中，使用存储器电路来存储来自相机的平均白和黑视频输出，使得给定的白 - 黑转换可以与自适应 白色和黑色参考，以补偿与扫描相机系统的镜头相关的文档背景光强度和渐晕的变化。

公开(公告)号：US4162429A

公开(公告)日：1979-07-24

申请号：US920581

申请日：1978-06-29

申请人： Robert T. Elms ,  Joseph C. Engel

发明人： Robert T. Elms ,  Joseph C. Engel

IPC分类号： H05B41/392 ,  H05B41/36

CPC分类号： H05B41/392 ,  Y10S315/05

摘要： Circuit for regulating the wattage drawn by a high-intensity-discharge (HID) lamp and for limiting the line current drawn by the lamp during starting to less than the line current drawn during normal lamp operation. The circuit includes a lamp current controlling means which has two operating modes, a first of which passes a less-than-nominal current to the lamp and a second of which passes a greater-than-nominal current to the lamp, with the ratio of the current of the second mode to the current of the first mode being less than 2:1. The lamp voltage is sensed and the line voltage also is sensed and these parameters are converted into separate current signals which are fed into a ramp capacitor to control the charging rate thereof. When the ramp capacitor achieves a predetermined level of charge during each half cycle of energizing potential, an AC switch is gated to shift the current controlling means from the first mode to the second mode. During lamp starting when the voltage drop thereacross is relatively low, the current controlling means remains in the first mode for at least the substantial portion of each half cycle of energizing potential, and after the lamp is normally operating, the ramp capacitor control, coupled with the low ratio of relative currents passed by the current controlling means, provides for an accurate control of lamp wattage and excellent overall performance.

摘要翻译： 用于调节由高强度放电（HID）灯吸取的瓦数的电路，并且限制在启动期间由灯吸收的线电流小于在正常灯操作期间画出的线电流。 该电路包括具有两种工作模式的灯电流控制装置，其中第一种工作模式通过小于标称电流至灯，其中第二种通过电流大于标称电流， 第二模式的电流与第一模式的电流小于2:1。 检测灯电压并且还检测线电压，并将这些参数转换成分别供给斜坡电容器以控制其充电速率的电流信号。 当斜坡电容器在通电电位的每个半周期期间达到预定的电荷水平时，选择一个AC开关以将电流控制装置从第一模式移动到第二模式。 在灯起动期间，当它的电压降相对较低时，电流控制装置保持在第一模式中至少在每个半周期的激励电位的实质部分，并且在灯正常工作之后，斜坡电容器控制与 由电流控制装置通过的相对电流的低比率提供了灯功率的精确控制和优异的整体性能。

公开(公告)号：US4072878A

公开(公告)日：1978-02-07

申请号：US540185

申请日：1975-01-10

申请人： Joseph C. Engel ,  Gary F. Saletta

发明人： Joseph C. Engel ,  Gary F. Saletta

IPC分类号： H05B41/04 ,  H05B37/00

CPC分类号： H05B41/042 ,  Y10S315/05

摘要： A lighting apparatus which provides for high voltage pulses for starting a high pressure sodium lamp. This apparatus uses a zener diode circuit which provides appropriately timed starting pulses even at relatively low line voltage. The apparatus can be designed to supply either one pulse or two pulses per cycle.

摘要翻译： 一种提供用于启动高压钠灯的高电压脉冲的照明装置。 该装置使用齐纳二极管电路，即使在相对低的线路电压下也提供适当的定时启动脉冲。 该设备可以设计为每个周期提供一个脉冲或两个脉冲。

公开(公告)号：US4016451A

公开(公告)日：1977-04-05

申请号：US558109

申请日：1975-03-13

申请人： Joseph C. Engel

发明人： Joseph C. Engel

IPC分类号： H05B41/392 ,  H05B37/02

CPC分类号： H05B41/3928 ,  Y02B20/202 ,  Y10S315/04 ,  Y10S315/05

摘要： The low-cost lighting control apparatus for high-pressure discharge lamps utilizing an ON-OFF photocoupler to provide isolation between the relatively high voltage AC supplied to the lamp load and the relatively low voltage DC control circuitry. Preferably, the apparatus is current-feedback stabilized utilizing a feedback resistor.

摘要翻译： 低成本的照明控制装置，用于利用开 - 关光耦合器提供提供给灯负载的相对高电压AC与相对低压DC控制电路之间的隔离的高压放电灯。 优选地，所述装置利用反馈电阻器进行电流反馈稳定。

公开(公告)号：US4006384A

公开(公告)日：1977-02-01

申请号：US646795

申请日：1976-01-06

申请人： Robert T. Elms ,  Joseph C. Engel

发明人： Robert T. Elms ,  Joseph C. Engel

IPC分类号： H05B41/16 ,  H05B41/232 ,  H05B41/234

CPC分类号： H05B41/2325 ,  Y10S315/05

摘要： Lead-lag, series-sequence starting and operating apparatus for three to six fluorescent lamps comprises two parallel circuit branches, one of which comprises a ballast capacitor and two lamps in series for a three or four lamp apparatus or three lamps in series for a five or six lamp apparatus. The other circuit branch comprises an inductor ballast and one or two lamps in series for a three or four lamp apparatus and two or three lamps in series for a five or six lamp apparatus. An additional ballast inductor connects in series with the two parallel-connected circuits and the AC power source. Starting capacitors parallel individual lamps and means are provided for preheating the lamp electrode coils upon energization of the apparatus. In operation, the lamp electrode coils are all preheated and the lamps which are ballasted by the capacitor, which constitutes the lead circuit, then sequentially start. The ballast capacitor and the additional ballast inductor constitute a circuit which is at least partially resonant at the line frequency and the resulting increased potential drop across the operating lead circuit sequentially initiates the discharge in the lamps which are in series with the first inductor, which constitutes the lag circuit. When all lamps are operating, the electrode coil heating potential is decreased to minimize power losses. For a four lamp circuit, the cost of the apparatus is considerably less than the cost of two two-lamp rapid start ballasts which are presently used for most installations, and the power losses in the present ballast are also considerably reduced.

摘要翻译： 用于三到六个荧光灯的串联时序启动和操作装置包括两个并联电路分支，其中之一包括镇流电容器和串联的三个或四个灯装置的两个灯或三个串联的五个灯五个 或六灯装置。 另一个电路支路包括电感镇流器和一个或两个串联的灯，用于三个或四个灯装置，以及两个或三个串联用于五或六个灯装置的灯。 一个额外的镇流电感与两个并联电路和交流电源串联。 提供并联的单独的灯和启动电容器，用于在设备通电时预热灯电极线圈。 在操作中，灯电极线圈都被预热，并且由构成引线电路的电容器镇定的灯随后顺序启动。 镇流电容器和附加的镇流电感器构成在线路频率处至少部分谐振的电路，并且在工作引线电路上产生的增加的电位降顺序地启动与第一电感器串联的灯中的放电， 滞后电路。 当所有的灯都工作时，电极线圈的发热电位降低，以最小化功率损耗。 对于四灯电路，该设备的成本远远低于目前用于大多数安装的两个两灯快速启动镇流器的成本，并且当前镇流器的功率损耗也大大降低。

公开(公告)号：US3939363A

公开(公告)日：1976-02-17

申请号：US445524

申请日：1974-02-25

申请人： Joseph C. Engel

发明人： Joseph C. Engel

IPC分类号： H02H9/04 ,  H02H7/00 ,  H02M1/00 ,  H02M1/32 ,  H02M7/04 ,  H02M7/12 ,  H02M7/155

CPC分类号： H02M1/32 ,  H02H9/04

摘要： A pair of Zener diodes having like electrodes interconnected for voltage suppressor functions also has a connection to their common point for obtaining half wave rectified voltage from an alternating source.

摘要翻译： 具有用于电压抑制器功能互连的类似电极的一对齐纳二极管还具有与它们的共同点的连接，以从交替源获得半波整流电压。