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41. 发明授权

US3024428A Magneto-strictive delay lines 失效
标题翻译：强磁延迟线
公开(公告)号：US3024428A
公开(公告)日：1962-03-06
申请号：US69581957
申请日：1957-11-12
申请人： SIEMENS EDISON SWAN LTD
发明人： JAMES WARMAN BLOOMFIELD
IPC分类号： G05D23/24 , G11C21/02 , H03H9/36
CPC分类号： G05D23/2456 , G11C21/026 , H03H9/36
摘要： 813,591. Automatic temperature control. SIEMENS EDISON SWAN Ltd. Oct. 17, 1957 [Nov. 14, 1956], No. 34819/56. Class 38 (4). The temperature of a magneto-strictive delay line is maintained constant by varying a heating current therethrough in accordance with its electrical impedance. In one embodiment, unbalance of a D.C. bridge B, Fig. 1, having the delay line D in one arm, is detected by the control winding CW of a saturable reactor S, the main winding MW of which is in series with an A.C. source T1, rectifier Rf and the input of the bridge. When the line D approaches the required temperature, the bridge approaches the balance point and the bridge current, and hence the line heating current, approaches zero. To avoid overheating the line, in abnormal conditions, e.g. during setting up, the circuit is rendered responsive to unbalance in one direction only by the inclusion of rectifier Rf2 in the circuit of the control winding CW. In a modification the bridge current is derived from a transistor amplifier controlled by the rectifier circuit including the saturable reactor, Fig. 2 (not shown), or the transistor amplifier may be replaced by a magnetic amplifier. In an embodiment using an A.C. bridge and line heating current, the bridge B1, Fig. 3, including the line D is supplied from the A.C. source through winding W3 of a transformer TF2. The out-of-balance potential is applied via transformer TF1, and transistor amplifier TS2, to the other winding W4 of transformer TF2 to augment the bridge current flowing through winding W3. If the bridge becomes unbalanced in the abnormal direction the amplified output of transformer TFl is in opposite phase and diminishes the bridge current. Series and shunt rectifiers Rf4 and Rf5 are connected in the collector-emitter path of transistor TS2 to protect the latter from positive excursions of the applied A.C.

42. 发明授权

US2945218A Monitoring system including a magnetic amplifier 失效
标题翻译：监控系统包括磁放大器
公开(公告)号：US2945218A
公开(公告)日：1960-07-12
申请号：US50962855
申请日：1955-05-19
申请人： BAILEY METER CO
发明人： MARKOW GEORGE R
IPC分类号： G05D23/24 , H02K1/12 , H03F9/04
CPC分类号： H02K1/12 , G05D23/2456 , H03F9/04

43. 发明授权

US2938387A Automatic control circuit 失效
公开(公告)号：US2938387A
公开(公告)日：1960-05-31
申请号：US62745456
申请日：1956-12-10
申请人： CONS VACUUM CORP
发明人： HAMILTON ALLEN R
IPC分类号： G05D23/24
CPC分类号： G05D23/2456

44. 发明授权

US2882328A Controller for regulating the resistance of a melt 失效
标题翻译：用于调节熔体电阻的控制器
公开(公告)号：US2882328A
公开(公告)日：1959-04-14
申请号：US69599757
申请日：1957-11-12
申请人： WORDEN EDGAR C
发明人： WORDEN EDGAR C
IPC分类号： G05D23/24
CPC分类号： G05D23/2456

45. 发明授权

US2632846A Electron control system responsive to changes in a variable 失效
标题翻译：响应变量变化的电子控制系统
公开(公告)号：US2632846A
公开(公告)日：1953-03-24
申请号：US63389145
申请日：1945-12-08
申请人： BAILEY METER CO
发明人： HORNFECK ANTHONY J
IPC分类号： G05D23/24
CPC分类号： G05D23/2453 , G05D23/2456

46. 发明授权

US2554945A Heat-regulating system 失效
标题翻译：调温系统
公开(公告)号：US2554945A
公开(公告)日：1951-05-29
申请号：US76039747
申请日：1947-07-11
申请人： WARREN WEBSTER & CO
发明人： FITZ GERALD ALAN S
IPC分类号： F24D19/10 , G05D23/24
CPC分类号： G05D23/2456 , F24D19/1009

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