公开(公告)号：US06760437B1

公开(公告)日：2004-07-06

申请号：US09148357

申请日：1998-09-04

Applicant: Wi-Cher Lim

Inventor： Wi-Cher Lim

IPC: H04M1900

CPC classification number: H04M3/18 ,  H02H9/02 ,  H04M2201/80 ,  H04M2207/203

Abstract: An overcurrent protection circuit for an analog modem which uses passive-device features during normal operation to minimize modem signal noise and distortion, and active-device features when inadvertently connected to a line having excessive line current.

Abstract translation: 用于模拟调制解调器的过流保护电路，其在正常操作期间使用无源器件特征来最小化调制解调器信号噪声和失真，以及当无意中连接到具有过大线路电流的线路时的有源器件特征。

公开(公告)号：US20190187457A1

公开(公告)日：2019-06-20

申请号：US16223648

申请日：2018-12-18

Applicant: Wi-Cher Lim ,  John Koger

Inventor： Wi-Cher Lim ,  John Koger

IPC: G02B26/08 ,  G02B7/182 ,  G05B15/02

CPC classification number: G02B26/0816 ,  G02B7/1821 ,  G05B15/02

Abstract: A heliostat includes a frame, a mirror coupled to the frame, a first actuator configured to rotate the mirror about a horizontal axis relative to the frame, a second actuator configured to rotate the mirror about a vertical axis relative to the frame, an angle indicator including data indicating an angle of the mirror relative to the frame, a time keeper, and a computing system. The computing system includes a processor, a memory, and a wireless communications interface. The computing system calculates a sun position using the time keeper, determines an approximate mirror angle to reflect sunlight towards a target by utilizing the sun position, a location of the frame, and an approximate alignment of the frame relative the target, and automatically adjusts the mirror to the approximate mirror angle based on the angle indicator by activating the first and second actuators.