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1.发明授权Selective calling line controller for detecting and generating code characters 失效用于检测和生成代码字符的选择性呼叫线控制器
公开(公告)号：US3531772A
公开(公告)日：1970-09-29
申请号：US3531772D
申请日：1968-02-16
Applicant: BELL TELEPHONE LABOR INC
Inventor： DALYAI STEPHEN A , GALLINA ALFONSO V , VOTAW CLARENCE J , WARWICK PETER S
IPC: H04L12/403 , H04Q9/00
CPC classification number: H04L12/40019 , H04L12/403
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公开(公告)号：US3582981A
公开(公告)日：1971-06-01
申请号：US3582981D
申请日：1969-03-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： DALYAI STEPHEN A
CPC classification number: H01H47/043 , H03K17/64
Abstract: A circuit for operating and holding a solenoid in response to an applied signal includes two transistor switches. The first switch closes a path between a capacitor and the solenoid coil to attain a voltage level necessary to operate the solenoid. The second switch closes a path between the capacitor and ground discharging the capacitor thereby decreasing the voltage applied to the coil after a predetermined time to a lower level required during the hold condition.
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3.发明授权Selective calling line controller for alternatively test polling remote stations or starting remote station transmitters 失效选择性呼叫线路控制器，用于替代测试远程站或启动远程站发射机
公开(公告)号：US3526877A
公开(公告)日：1970-09-01
申请号：US3526877D
申请日：1968-02-16
Applicant: BELL TELEPHONE LABOR INC
Inventor： CARLSON DAVID E , DALYAI STEPHEN A , GALLINA ALFONSO V , ROBINSON EDGAR R , VOTAW CLARENCE J , WARWICK PETER S
IPC: H04L12/403 , H04Q3/42 , H04Q9/00
CPC classification number: H04L12/40019 , H04L12/403
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