GB671594A - Improvements in or relating to electronic phase shift apparatus - Google Patents
Improvements in or relating to electronic phase shift apparatusInfo
- Publication number
- GB671594A GB671594A GB8427/50A GB842750A GB671594A GB 671594 A GB671594 A GB 671594A GB 8427/50 A GB8427/50 A GB 8427/50A GB 842750 A GB842750 A GB 842750A GB 671594 A GB671594 A GB 671594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- pulses
- valve
- trigger
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/26—Time-delay networks
- H03H11/265—Time-delay networks with adjustable delay
Landscapes
- Inverter Devices (AREA)
- Particle Accelerators (AREA)
Abstract
671,594. Electric control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 4, 1950. [June 15, 1949] No. 8427/50. Class 40 (i). [Also in Group XL (c)] In a pulse delaying circuit an input signal is applied via an amplifier to trigger a first pulse generator which produces a reference pulse having a predetermined phase relationship to the input signal, the reference pulse is then applied via a variable delay stage to trigger a second pulse generator to produce an output pulse which has a pre-determined but variable delay with respect to the reference pulse. The invention may be applied to a rotor balancing equipment for securing an adjustable phase relationship between a sine-wave generator or other cyclically operating component of the equipment and an input signal controlled by the revolution or vibration of the rotor to be balanced. In such a system the signal source 10 shown in the Figure comprises a vibration pick-up, a photoelectric pulse generator or an A.C. tachometer generator and the pulses produced across the cathode load of valve 83 are used to synchronise a sinusoidal voltage generator 90. The input signal from source 10 is applied through an amplifying or phase-inverting stage comprising valve 23 to an amplifying and shaping circuit comprising valves 33 and 43 respectively. The voltage across the load resistor 44 is differentiated by resistor-capacitor network 54, 48 and the positive peaks trigger a single-stroke blocking oscillator stage comprising valve 53 to produce a series of positivegoing output pulses across its cathode load, in coincidence with the first impulsive portion of the input signal from generator 10 ; these reference pulses may be taken from terminal 8. The pulses produced across the cathode load of valve 53 trigger a cathode-coupled flip-flop circuit comprising valves 63, 631 the changeover point of which is adjustable by variation of resistor 65, or capacitors 171-175 to produce after differentiation by network 76, 84 a series of positive going pulses the positions of which relative to that of the reference pulses at terminal 8 may be varied by adjusting the change over point of the flip-flop circuit. These positive going pulses trigger a further blocking- oscillator stage comprising valve 83, to produce a sequence of positive pulses across the cathode load which are applied to the utilization circuit 90. In a modification Fig. 4 (not shown), the blocking oscillator pulse generator stages are replaced by a pulse generating circuit in which a capacitor is charged from the H.T. supply via a resistor and is periodically discharged through a thyratron which is rendered conducting by the positive going trigger pulses. In a further modification, Fig. 6 (not shown), the cathode coupled flip-flop stage has its change-over point adjusted by variation of the grid bias of the normally non-conductive valve. The flip-flop stage may be replaced by a phantastron Miller-integrator circuit, Fig. 5 (not shown), comprising a penta-grid valve which produces an output pulse across its cathode load which has a delay with respect to the positive triggering pulse which is adjusted by variation of the bias on the third grid.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US286548XA | 1949-06-15 | 1949-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB671594A true GB671594A (en) | 1952-05-07 |
Family
ID=21844676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8427/50A Expired GB671594A (en) | 1949-06-15 | 1950-04-04 | Improvements in or relating to electronic phase shift apparatus |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH286548A (en) |
DE (1) | DE847627C (en) |
FR (1) | FR1020053A (en) |
GB (1) | GB671594A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078670B (en) * | 1952-12-04 | 1960-03-31 | Philips Nv | Arrangement for the control or automatic regulation of the speed of an induction motor fed by grid-controlled discharge paths in a converter circuit |
DE1023133B (en) * | 1954-11-17 | 1958-01-23 | Bbc Brown Boveri & Cie | Arrangement for asymmetrical control of power converters |
-
1950
- 1950-04-04 GB GB8427/50A patent/GB671594A/en not_active Expired
- 1950-05-05 DE DEW1931A patent/DE847627C/en not_active Expired
- 1950-05-09 CH CH286548D patent/CH286548A/en unknown
- 1950-06-12 FR FR1020053D patent/FR1020053A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH286548A (en) | 1952-10-31 |
DE847627C (en) | 1952-08-25 |
FR1020053A (en) | 1953-02-02 |
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