GB791033A - Improvements relating to electric circuit arrangements - Google Patents
Improvements relating to electric circuit arrangementsInfo
- Publication number
- GB791033A GB791033A GB3767954A GB3767954A GB791033A GB 791033 A GB791033 A GB 791033A GB 3767954 A GB3767954 A GB 3767954A GB 3767954 A GB3767954 A GB 3767954A GB 791033 A GB791033 A GB 791033A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- phase
- dec
- voltages
- switches
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
- B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
- B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
- B23Q35/12—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means
- B23Q35/121—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using mechanical sensing
- B23Q35/123—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using mechanical sensing the feeler varying the impedance in a circuit
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Rectifiers (AREA)
Abstract
791,033. Phase-sensitive circuits. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 1, 1955 [Dec. 30, 1954], No. 37679/54. Class 38 (4). In an arrangement for generating a substantially sinusoidal voltage having, a predetermined phase relative to a reference voltage and an amplitude dependent on that of a control voltage, a voltage of rectangular waveform, Fig. 1, is developed in which alternate periods of positive and negative value each of one-third of a cycle are equally spaced and the desired output is derived through a filter circuit. Onoff switches S1-S4 in the network, Fig. 2, are cyclically controlled as shown in Fig. 6 (a) and produce at the junction of resistors R1, R2 from the voltages +V and -V at terminals IT1, IT2 the waveform of Fig. 1 of negligible third harmonic content. The voltages V are equal and opposite and are controlled by a control signal. The on-off switches which may be the rectifier arrangements described with reference to Figs. 3-5 (not shown) may be fed from a three-phase supply through a Scott transformer arrangement to obtain the desired phase relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3767954A GB791033A (en) | 1954-12-30 | 1954-12-30 | Improvements relating to electric circuit arrangements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3767954A GB791033A (en) | 1954-12-30 | 1954-12-30 | Improvements relating to electric circuit arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB791033A true GB791033A (en) | 1958-02-19 |
Family
ID=10398206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3767954A Expired GB791033A (en) | 1954-12-30 | 1954-12-30 | Improvements relating to electric circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB791033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156212A (en) * | 2021-05-07 | 2021-07-23 | 广州赛恩科学仪器有限公司 | DC bias output system and method of AC self-balancing bridge |
-
1954
- 1954-12-30 GB GB3767954A patent/GB791033A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156212A (en) * | 2021-05-07 | 2021-07-23 | 广州赛恩科学仪器有限公司 | DC bias output system and method of AC self-balancing bridge |
| CN113156212B (en) * | 2021-05-07 | 2023-09-05 | 广州赛恩科学仪器有限公司 | DC offset output system and method of AC self-balancing bridge |
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