公开(公告)号：US3746970A

公开(公告)日：1973-07-17

申请号：US3746970D

申请日：1972-04-13

Applicant: IBM

Inventor： VAN CLEAVE G

IPC: H02M1/08 ,  G05F1/445 ,  G05F1/455 ,  G05F1/56 ,  G05F1/66 ,  G05F1/44

CPC classification number: G05F1/66 ,  G05F1/445

Abstract: A regulating power supply circuit in which the power supplied at the output is controlled by controlling the firing angle of a thyrister switching device in response to changes in a hybrid signal which is indicative of the difference between the RMS value of the output voltage and a desired RMS value. The hybrid signal is formed by summing a feedback current proportional to the absolute load voltage with a reference current proportional to the firing angle of the thyrister on a summing capacitor. Since for any given RMS voltage, the value of the average load voltage varies linearly with the conduction angle over a large range of conduction angles, the phase angle proportional reference current source is utilized to relate the absolute output voltage with the RMS voltage linearly over a wide range of input voltages.

Abstract translation: 一种调节电源电路，其中通过控制混合信号的变化来控制可控硅开关装置的触发角来控制输出端的功率，该混合信号的变化表示输出电压的RMS值与期望的 RMS值。 通过将与绝对负载电压成比例的反馈电流与在求和电容器上的可控元件的触发角成比例的参考电流相加来形成混合信号。 由于对于任何给定的RMS电压，平均负载电压的值在大的导通角范围内与导通角呈线性变化，所以使用相位角比例参考电流源将绝对输出电压与RMS电压线性地相关联 宽范围的输入电压。

公开(公告)号：US3720465A

公开(公告)日：1973-03-13

申请号：US3720465D

申请日：1970-11-20

Applicant: IBM

Inventor： FOWLER R ,  HOBGOOD G ,  BRUCE G ,  DAVIDGE R ,  LOCKLAR H ,  VAN CLEAVE G

IPC: G03B27/52 ,  G03G15/04

CPC classification number: G03B27/526

Abstract: The optical illumination and scanning system for document reproduction consists of two rotatable mirrors mounted in fixed side-by-side relationship. A light source illuminates the first mirror which reflects the light to a section of an original document. This light is reflected by the document to the second mirror which reflects this return beam through a lens system to a photoconductor surface. The mirror assembly oscillates across the entire original without changing the fixed relationship between the light beam reflected to the original and the return beam focused on the photoconductive surface.

Abstract translation: 用于文件再现的光学照明和扫描系统包括以可固定的并排关系安装的两个可旋转镜。 光源照亮将第一反射镜反射到原稿的一部分。 该光被文件反射到第二反射镜，其将该返回光束通过透镜系统反射到感光体表面。 反射镜组件在整个原件上摆动，而不改变反射到原稿的光束与聚焦在光导表面上的返回光束之间的固定关系。