GB717726A - Electric motor speed regulation - Google Patents
Electric motor speed regulationInfo
- Publication number
- GB717726A GB717726A GB20583/52A GB2058352A GB717726A GB 717726 A GB717726 A GB 717726A GB 20583/52 A GB20583/52 A GB 20583/52A GB 2058352 A GB2058352 A GB 2058352A GB 717726 A GB717726 A GB 717726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- circuit
- standard source
- valve
- frequency doubling
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/32—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring using discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
717,726. Valve circuits. CREED & CO., Ltd. Aug. 15, 1952 [Sept. 7, 1951], No. 20583/52. Class 40 (6). [Also in Group XXXV] Frequency references in an automatic system for synchronizing high-speed facsimile transmission (see Group XXV) are provided by a standard source with dividers and multipliers. The standard source 23 which may be e.g. a 240 c/s tuning fork feeds to a frequency doubling circuit followed by a tripler circuit giving a 1440 c/s output. The frequency doubling circuit comprises paraphase-splitter valves 146, 148 having their outputs connected in parallel through halfwave rectifiers 156, 159 to the grid of a valve 160 which has a positively biased suppressor and the control grid biased to cut-off to generate a large third harmonic component, which is selected by a tuned filter 169, 170 in the anode circuit. A 60 c/s output is derived from a conventional multivibrator divider 141, 142.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US717726XA | 1951-09-07 | 1951-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB717726A true GB717726A (en) | 1954-11-03 |
Family
ID=22103485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20583/52A Expired GB717726A (en) | 1951-09-07 | 1952-08-15 | Electric motor speed regulation |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB717726A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268789A (en) * | 1963-07-05 | 1966-08-23 | Intron Int Inc | Control system for electromagnetic motors |
| US3301946A (en) * | 1961-06-21 | 1967-01-31 | Victor Company Of Japan | Control system for magnetic recording device |
-
1952
- 1952-08-15 GB GB20583/52A patent/GB717726A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3301946A (en) * | 1961-06-21 | 1967-01-31 | Victor Company Of Japan | Control system for magnetic recording device |
| US3268789A (en) * | 1963-07-05 | 1966-08-23 | Intron Int Inc | Control system for electromagnetic motors |
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