GB779024A - Improvements in or relating to circuit arrangements for controlling gas- or vapour-filled discharge tubes - Google Patents
Improvements in or relating to circuit arrangements for controlling gas- or vapour-filled discharge tubesInfo
- Publication number
- GB779024A GB779024A GB4152/55A GB415255A GB779024A GB 779024 A GB779024 A GB 779024A GB 4152/55 A GB4152/55 A GB 4152/55A GB 415255 A GB415255 A GB 415255A GB 779024 A GB779024 A GB 779024A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- valve
- source
- circuit
- grid
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/012—Automatic controllers electric details of the transmission means
- G05B11/013—Automatic controllers electric details of the transmission means using discharge tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/02—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters
- H02M1/04—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control
- H02M1/042—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control wherein the phase of the control voltage is adjustable with reference to the AC voltage
Abstract
779,024. Rectifying. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 11, 1955 [Feb. 13, 1954], No. 4152/55. Class 38 (2). The instant of ignition of a gas- or vapourfilled valve 8 through which a load 9 is supplied with D.C. from a source of A.C. 10, is controlled by varying its grid-cathode voltage which is the sum of an alternating voltage from transformer 7 and the voltage drop across resistor 5 which is in the anode-cathode circuit of a hard valve 1 in series with a battery 6. Conductivity of valve 1 is controlled by variation, e.g. by a high-speed circuit breaker, of the unidirectional voltage of source 4 which is connected in series opposition to a battery 2 and in series with a source 3 of alternating voltage. With zero voltage of source 4, valve 1 carries saturation anode current and the consequent voltage drop a, b, c, d, Fig. 4, added to voltage 22 of source 7 gives a resultant cathode voltage 23 to valve 8 which, being less than the required value 20 does not fire valve 8. When voltage 4 increases, the voltage across resistor 5 becomes e, f, g, h, Fig. 5, and the resultant grid voltage 24 rises above valve 20 at point 25 to fire valve 8 at instant 26 in the positive halves of the anodecathode voltage wave 16. As voltage 4 increases, the instant of firing advances. The trailing edge of the firing peak follows closely the voltage 22 which leads the anode-cathode voltage 16 by 30 degrees so that when the latter reverses the grid of valve 8 is negative and danger of back fire is reduced. Voltage from source 3 leads voltage 22 from source 7 by 45 degrees. In a three-phase circuit, Figs. 7, 9 (not shown), the danger of back firing before ignition of the incoming phase may be reduced by arranging an R.C. circuit in the grid circuit of valve 8, Fig. 8 (not shown), whereby the phase of voltage 22 is altered and a negative direct voltage is added to it.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL327901X | 1954-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB779024A true GB779024A (en) | 1957-07-17 |
Family
ID=19784241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4152/55A Expired GB779024A (en) | 1954-02-13 | 1955-02-11 | Improvements in or relating to circuit arrangements for controlling gas- or vapour-filled discharge tubes |
Country Status (7)
Country | Link |
---|---|
US (1) | US2829312A (en) |
BE (1) | BE535680A (en) |
CH (1) | CH327901A (en) |
DE (1) | DE958141C (en) |
DK (1) | DK85567C (en) |
FR (1) | FR1122283A (en) |
GB (1) | GB779024A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL104257C (en) * | 1959-11-27 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1927676A (en) * | 1932-03-09 | 1933-09-19 | Gen Electric | Electric timing and counting device |
US1985069A (en) * | 1932-05-24 | 1934-12-18 | Gen Electric | Electric timing circuit |
US2306784A (en) * | 1940-12-17 | 1942-12-29 | Gen Electric | Electric control circuit |
US2511981A (en) * | 1947-09-26 | 1950-06-20 | Rca Corp | Electronic thermostat |
US2503735A (en) * | 1948-03-13 | 1950-04-11 | Hartford Nat Bank & Trust Co | Protecting device for gas-or vaporfilled controlled discharge tubes |
-
0
- BE BE535680D patent/BE535680A/xx unknown
-
1955
- 1955-01-03 US US479580A patent/US2829312A/en not_active Expired - Lifetime
- 1955-02-09 FR FR1122283D patent/FR1122283A/en not_active Expired
- 1955-02-10 DE DEN10172A patent/DE958141C/en not_active Expired
- 1955-02-10 DK DK46255AA patent/DK85567C/en active
- 1955-02-11 CH CH327901D patent/CH327901A/en unknown
- 1955-02-11 GB GB4152/55A patent/GB779024A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2829312A (en) | 1958-04-01 |
DK85567C (en) | 1958-05-19 |
DE958141C (en) | 1957-02-14 |
FR1122283A (en) | 1956-09-04 |
CH327901A (en) | 1958-02-15 |
BE535680A (en) |
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