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1.Combined reference voltage source and comparison voltmeter with digital indicator 失效
Title translation: 与数字指示器组合的参考电压源和比较电压表公开(公告)号:US3465246A
公开(公告)日:1969-09-02
申请号:US3465246D
申请日:1966-06-30
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
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2.Transistor checker using alternating line current in phase between emitter and base and emitter and collector for testing power transistors 失效
Title translation: 晶体管检查器使用发射极和基极之间的交流线电流以及用于测试功率晶体管的发射极和集电极公开(公告)号:US3332015A
公开(公告)日:1967-07-18
申请号:US32237763
申请日:1963-11-08
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: G01R31/26
CPC classification number: G01R31/2608
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公开(公告)号:US3045169A
公开(公告)日:1962-07-17
申请号:US69984357
申请日:1957-11-29
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H02M1/14
CPC classification number: H02M1/14
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公开(公告)号:US2289301A
公开(公告)日:1942-07-07
申请号:US25290039
申请日:1939-01-26
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H03F3/28
CPC classification number: H03F3/28
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公开(公告)号:US2144009A
公开(公告)日:1939-01-17
申请号:US5266135
申请日:1935-12-03
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H01R33/76
CPC classification number: H01R33/7664
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6.Analog device for multiplying/dividing using photoconductive means 失效
Title translation: 使用光电装置进行多路复用/分割的模拟装置公开(公告)号:US3497717A
公开(公告)日:1970-02-24
申请号:US3497717D
申请日:1966-09-29
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
CPC classification number: G06G7/163
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公开(公告)号:US2293274A
公开(公告)日:1942-08-18
申请号:US7287536
申请日:1936-04-06
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H03G5/26
CPC classification number: H03G5/26
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公开(公告)号:US2136664A
公开(公告)日:1938-11-15
申请号:US6145836
申请日:1936-01-30
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H03G5/26
CPC classification number: H03G5/26
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公开(公告)号:US2129726A
公开(公告)日:1938-09-13
申请号:US6145736
申请日:1936-01-30
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
IPC: H03D1/10
CPC classification number: H03D1/10
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10.Circuit for limiting the firing of a silicon controlled rectifier to a low angle of the input alternating current 失效
Title translation: 限制将硅控制整流器发射到输入交流电流的低角度的电路公开(公告)号:US3562628A
公开(公告)日:1971-02-09
申请号:US3562628D
申请日:1968-06-10
Applicant: BARBER ALFRED W
Inventor: BARBER ALFRED W
CPC classification number: G05F1/452 , G05D23/1906 , G05D23/22
Abstract: In a system normally providing random firing signals to a pair of silicon controlled rectifiers, one for each phase of an alternating current source of power, in phase inhibiting pulses are applied to reduce the firing angle to a predetermined maximum.
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