US2820178A - Switching arrangement for switchingoff the ignition protective gear on the blowing of a fuse - Google Patents
Switching arrangement for switchingoff the ignition protective gear on the blowing of a fuse Download PDFInfo
- Publication number
- US2820178A US2820178A US446506A US44650654A US2820178A US 2820178 A US2820178 A US 2820178A US 446506 A US446506 A US 446506A US 44650654 A US44650654 A US 44650654A US 2820178 A US2820178 A US 2820178A
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- US
- United States
- Prior art keywords
- fuse
- current
- blowing
- switchingoff
- protective gear
- 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 - Lifetime
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/248—Electric supplies using discharge tubes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1209—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes
Description
1958 HElNZ-WILHELM HARMS 2,820,178
SWITCHING ARRANGEMENT FOR SWITCHING-OFF THE IGNITION PROTECTIVE GEAR oN THE BLOWING OF A FUSE Filed July 29, 1954 INVENTOR HEINZ WILHELM HARMS WW AGENT Uni e St t s? Pa Tic-e SWITCHING ARRANGEMENT FOR SWITCHING- OFF THE IGNITION PROTECTIVE GEAR ON THE BLOWING OF A FUSE Heinz-Wilhelm Harms, Hamburg-Harburg, Germany, as-
signor, by mesne assignments, to North American Philips Company, Inc., New York, N. Y., a corporation of Delaware Application July 29, 1954, Serial No. 446,506 4 Claims. (Cl. 315-201) The present invention relates to an electrical circuit arrangement for the protection of ignition type tubes.
As is well known, ignitron protective gear is used in apparatus in which alternating voltages frequently have to be switched or controlled. In such systems, the output load is generally a transformer, and the switching and controlling of the alternating voltage supplied to the transformer is accomplished by means of two conversely connected ignitron tubes, one tube controlling the positive half-waves and the other the negative half-waves of the current. The tubes are ignited by current pulses supplied to the ignition electrodes of the tubes and become extinguished when the current passes through zero.
The ignitron protection systems heretofore proposed have the disadvantage that, when a fuse blows, one tube remains operative with the result that the output transformer is supplied with a pulsating direct voltage.
The arrangement according to the invention provides a protection system in which, when a fuse blows, both tubes are automatically switched-off. The invention will be described in greater detail with reference to the appended drawing forming part of the specification. The circuit there shown comprises ignitron tubes 1 and 2, resistors 3 and 4, fuses 8 and 9, rectifiers 14 and 15, operating switch 16 and water control switch 18 and a normally closed contact 17.
The system comprising the above elements operates as follows: When the anode of tube 1 is positive as shown, this tube is ready to fire if sufiicient igniter current is passed.- The required igniter current is supplied by the series path which may be traced from the anode of tube 1, through the fuse 9, the rectifier 15, the switches 18, 17 and 16, and the resistor 4. On the alternate half cycles, the anode of tube 2 becomes positive and this tube is rendered conductive by energizing the igniter thereof. Current for the igniter of tube 2 is supplied by the series path which may be traced from the anode of tube 2, through the fuse 8, the rectifier 14, switches 16, 17 and 18, and the resistor 3.
It will be seen that in the event that either fuse 8 or 9 blows, only one of the igniter current paths is inter rupted, so that only one ignitron is taken out of service, with the result that a pulsating direct voltage is supplied to the output transformer.
According to the invention, in order to switch oif both ignitrons in the event of the opening of one of the igniter circuits, there is provided a bridge circuit comprising resistors 5, 6, 12 and 13, a rectifier 7, a capacitor 10 and a relay 11 actuating the contact 17.
In the normal operative condition the bridge made up of resistors 5, 6, 12 and 13, is balanced so that no current flows through the diagonal arm comprising the rectifier 7, the relay 11 having in parallel combination the capacitor 10. Due to the balance of the bridge no current flows through the relay 11 so that the contact 17 remains closed.
2,820,178 Pate nted,Jan. 14, 8
If new one of the fuses 8 or 9 blows. the balance of the bridge is upset since one bridge arm is interrupted. Consequently a current flows through the zero arm which energizes the relay 11 andopens the contact 17,.which is in the commoh'portiori of the igniter current paths. As a result bothdgnitionjcircuits are interrupted so thatboth tubes remain cut-o Naturally this additional switchingarrangement may also be used in controllable ignition apparatus in which use is made of grid-controlled rectifiers instead of dry rectifier. The arrangement may be extended so that by means of this safety relay further control circuits are switched-off when a fuse blows.
While the invention has been described by means of a specific example and in a spacific embodiment, I do not wish to be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit and scope of the invention.
What is claimed is:
1. An electrical circuit arrangement comprising two discharge devices each having an ionizable medium and having an electrode for initiating ionization of said medium, a first energizing current path connected to the said electrode of the first of said devices and comprising a first member for interrupting said first path upon the flow of excessive current therein, a second energizing current path connected to the said electrode of the second of said devices and comprising a second member for interrupting said second path upon the flow of excessive current therein, and means responsive to the interruption of one of said paths by the said path interrupting member thereof for interrupting the other of said paths.
2. An electrical circuit arrangement comprising two discharge devices each having an ionizable medium and having an electrode for initiating ionization of said medium, a first energizing current path connected to the said electrode of the first of said devices and comprising a first member for interrupting said first path upon the flow of excessive current therein, a second energizing current path connected to the said electrode of the second of said devices and comprising a second member for interrupting said second path upon the flow of excessive current therein, said first and second paths having a portion thereof in common, and means responsive to the interruption of one of said paths by the said path interrupting member thereof for interrupting said common portion of said current paths.
3. An electrical circuit arrangement comprising two discharge devices each having an ionizable medium and having an electrode for initiating ionization of said medium, a first energizing current path connected to the said electrode of the first of said devices and comprising a first member for interrupting said first path upon the flow of excessive current therein, a second energizing current path connected to the said electrode of the second of said devices and comprising a second member for interrupting said second path upon the flow of excessive current therein, and a network shunting said first and second members and comprising means responsive to current flow through said network upon interruption of one of said paths for interrupting the other of said paths.
4. An electrical circuit arrangement comprising two ignitrons each having a cathode, an anode, an ionizable medium and an igniter for initiating ionization of said medium, a first energizing current path connected between the anode and igniter of the first of said ignitrons and comprising in series arrangement, a fuse element, a rectifier, a switch contact and a resistor, a second energizing current path connected between the anode and igniter of c 3:; tfie second of said i'gni'trons and comprising in series References Cited in the file of this patent arrangement; a sccond'fuse element, a second rectifier, U D STATES PATENTS said switch contact and a second resistor, a first network shunting said,firstiuscelement,and.corrggrisjng imseries 1660965 Hartzell 1923 arrangement a, third, resistor, at third, rectifier,, a;.rela.y; 5 1302958 1933 coil,andna,.fourtb.resistor, aisecondrnetwork shuntingsaid 2'377506 Mcwhlrter a1; June 1945 second, fuse. elcmentand, comgrising in series arrangef f f Thmnaumas Q 19-475 inent, ajnurthrresis'tor said thirdrcctifier, rsaidmely coil 3 233M142? Film-9w M 9 1948 andea fiffth, resistor, and; mean7s;to.coi1p le;saidrglayycoil fi l a'g g2? to sand swltch contact thereby to actnatmtheeame upon 10 23605325 b m r a uly 29,1952
curreneflow through sald rclay corh 3 265L326. weinfun: p P; I 2
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US446506A US2820178A (en) | 1954-07-02 | 1954-07-29 | Switching arrangement for switchingoff the ignition protective gear on the blowing of a fuse |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1945654A GB756220A (en) | 1954-07-02 | 1954-07-02 | Improvements in switching circuits comprising reverse parallel connected ignitrons |
US446506A US2820178A (en) | 1954-07-02 | 1954-07-29 | Switching arrangement for switchingoff the ignition protective gear on the blowing of a fuse |
Publications (1)
Publication Number | Publication Date |
---|---|
US2820178A true US2820178A (en) | 1958-01-14 |
Family
ID=26254061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US446506A Expired - Lifetime US2820178A (en) | 1954-07-02 | 1954-07-29 | Switching arrangement for switchingoff the ignition protective gear on the blowing of a fuse |
Country Status (1)
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US (1) | US2820178A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3056903A (en) * | 1957-03-04 | 1962-10-02 | Schlatter Ag | Control arrangement for gas-discharge tubes |
US3097314A (en) * | 1961-07-24 | 1963-07-09 | Ryan Aeronautical Co | Alternating current silicon controlled rectifier switch |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1660965A (en) * | 1922-08-25 | 1928-02-28 | Walter L Hartzell | Protective system |
US1902958A (en) * | 1929-08-14 | 1933-03-28 | Westinghouse Electric & Mfg Co | Circuit breaker |
US2377506A (en) * | 1942-06-02 | 1945-06-05 | Standard Telephones Cables Ltd | Supervision of electric power supply circuits |
US2431352A (en) * | 1941-04-25 | 1947-11-25 | Int Standard Electric Corp | Thermally responsive electrical relay system |
US2438742A (en) * | 1945-08-09 | 1948-03-30 | Republic Steel Corp | Ignitron welding control |
US2441789A (en) * | 1944-06-28 | 1948-05-18 | Gen Electric | Electromagnetic switching system aided by space-discharge device |
US2531958A (en) * | 1942-12-18 | 1950-11-28 | Stewart Warner Corp | Protective device for fuel lines or the like |
US2605325A (en) * | 1950-06-20 | 1952-07-29 | Westinghouse Electric Corp | Bridge-connected relay |
US2665396A (en) * | 1951-11-02 | 1954-01-05 | Mcgraw Electric Co | Circuit breaker |
-
1954
- 1954-07-29 US US446506A patent/US2820178A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1660965A (en) * | 1922-08-25 | 1928-02-28 | Walter L Hartzell | Protective system |
US1902958A (en) * | 1929-08-14 | 1933-03-28 | Westinghouse Electric & Mfg Co | Circuit breaker |
US2431352A (en) * | 1941-04-25 | 1947-11-25 | Int Standard Electric Corp | Thermally responsive electrical relay system |
US2377506A (en) * | 1942-06-02 | 1945-06-05 | Standard Telephones Cables Ltd | Supervision of electric power supply circuits |
US2531958A (en) * | 1942-12-18 | 1950-11-28 | Stewart Warner Corp | Protective device for fuel lines or the like |
US2441789A (en) * | 1944-06-28 | 1948-05-18 | Gen Electric | Electromagnetic switching system aided by space-discharge device |
US2438742A (en) * | 1945-08-09 | 1948-03-30 | Republic Steel Corp | Ignitron welding control |
US2605325A (en) * | 1950-06-20 | 1952-07-29 | Westinghouse Electric Corp | Bridge-connected relay |
US2665396A (en) * | 1951-11-02 | 1954-01-05 | Mcgraw Electric Co | Circuit breaker |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3056903A (en) * | 1957-03-04 | 1962-10-02 | Schlatter Ag | Control arrangement for gas-discharge tubes |
US3097314A (en) * | 1961-07-24 | 1963-07-09 | Ryan Aeronautical Co | Alternating current silicon controlled rectifier switch |
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