US1787300A - Electric-discharge device - Google Patents
Electric-discharge device Download PDFInfo
- Publication number
- US1787300A US1787300A US283722A US28372227A US1787300A US 1787300 A US1787300 A US 1787300A US 283722 A US283722 A US 283722A US 28372227 A US28372227 A US 28372227A US 1787300 A US1787300 A US 1787300A
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- US
- United States
- Prior art keywords
- cathode
- discharge device
- heater element
- receptacle
- anode
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- 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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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
- H03F1/546—Delaying application of anode power supply with respect to application of filament heating power supply
Definitions
- the present invention relates to electric discharge devices.
- three-element electric discharge devices it is common to employ a high tension direct current supply for theplate or anode circuit and a low tension direct currentsupply for the filament... It is often desirable, however, to employ a single with the accompanying drawing, in which Figs. 1. and 2 respectively show diagrammatically a three-electrode electron discharge device and a two-electrode electron discharge device embodying the features ofthe present invention.
- l have indicated at l a container'adapted to he maintained at a vacuuni'or low gas pressure as desired.
- a plurality of electrodes comprising an anode 2, grid 3 and cathode 4; are mounted in the container.
- the cathode comprises .a hollow cylindrical metal member coated on the outside with a suitable oxide so'that it will emit electrons at" a relatively low temperature.
- the cathode is adapted to be heated from the inside and for this purpose'a tungsten or other suitable heating element or wire 5 is placed within the cathode and connected in circuit with a thermostatic strip 6 and a contactor 7, the contactor and thermostatic stripbeing'separatedby a block of inupper end being free to move to the left of the position shown in Fig. 1 when the strip is heated to a certain temperature and to thereby separate contactor 7 and cathode 4;.
- a source of high voltage direct current 10 is connected to anode 2 and cathode 4, the thermostatic strip being connected to the anode through a resist/or 11.
- the discharge device may be employed to produce high frequency oscilla: tions for the excitation ofa vapor lamp 9. This may he done by connectin the ends of a transformer winding 12 to the plate and grid members of the tuloe 1, the central point of the transformer winding being connected to f the. cathode.
- A. secondary transformer winding 13, in inductive relationto winding 12, is connected to a coil 14 surrounding vapor lamp 9. While I have illustrated the discharge device as furnishing a source of high frequency current to lamp 9, it obviously Fig. 1. In Fig. 2 ananode 2, cathode 4,-
- heater element 5 and thermostatic strip 6 are mounted in a receptacle 1.
- a resistance element 11 is connected as inFi 1 between the anode andheater element w ile the. cathode and anode are connected to the secondary winding 15 of a transformer 16 and to a con.-
- An electron discharge device comprising in the receptacle, the cathode including a heater element, said heater element being mounted in the receptacle and electrically connected with the cathode, and current retween the heater element and cathode.
- An electron discharge device comprising in the receptacle, the cathode including an inner heater element, said heater element being mounted in the receptacle and electrically connected with the cathode, and temperature. responsive means for breaking the contact be tween the inner heater element and cathode.
- An electron discharge device comprising a cathode and anode, said cathode comprising a hollow cylindrical member, a" heater element mounted in said cylindrical member and electrically connected with said member, and means for breaking the electrical contact between the heater element and cylindrical member.
- An electron discharge device comprising a receptacle, an anode and cathode mounted in the receptacle, the cathode including a heater element, said heater element being mounted in the receptacle and electrically connected with-the cathode, current responsive means for breaking the connection between the heater element and cathode andmeans for producing a discharge across the the cathode continues to be'heated.
- An electron discharge device comprising a" receptacle, an anode and cathode mounted in the receptacle, the cathode including an inner heater element, said heater element being an anode and cathode mounted an anode and cathode mounted for breaking the contact bemounted in the receptacle and electrically con- I nected with the cathode, temperature responsive means for breaking the connection between the inner heater element and cathode and means for causing a flow of current between the cathode and heater members whereby the temperature of the latter is maintained.
- An electron discharge device comprising 'a cathode and anode, saidcathode comprising a hollow cylindrical member, a heater' element mounted in said cylindrical member.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electron Sources, Ion Sources (AREA)
Description
, Em m E. F. W.IALEXANDE RSON 5 ELECTRIC DISCHARGE DEVICE F'iled Nov. 16. 1927 Invntor: Evnst F; AIexanderson His Attorney 7 sense a". w. 1
Patented Dec. 30, 1,930-
a or
. mason, or scnnnncranv, new roan, essronon no nnncrarc oomranr, A conrona'rron or nnw voan ELECTRIC-DISCHARGE DEVICE Application filed November 16, 192?. serial Ito. 238,?22.
The present invention: relates to electric discharge devices. In three-element electric discharge devices, it is common to employa high tension direct current supply for theplate or anode circuit and a low tension direct currentsupply for the filament... It is often desirable, however, to employ a single with the accompanying drawing, in which Figs. 1. and 2 respectively show diagrammatically a three-electrode electron discharge device and a two-electrode electron discharge device embodying the features ofthe present invention.
Referring to the drawing, l have indicated at l a container'adapted to he maintained at a vacuuni'or low gas pressure as desired.
A plurality of electrodes comprising an anode 2, grid 3 and cathode 4; are mounted in the container. The cathode comprises .a hollow cylindrical metal member coated on the outside with a suitable oxide so'that it will emit electrons at" a relatively low temperature. The cathode is adapted to be heated from the inside and for this purpose'a tungsten or other suitable heating element or wire 5 is placed within the cathode and connected in circuit with a thermostatic strip 6 and a contactor 7, the contactor and thermostatic stripbeing'separatedby a block of inupper end being free to move to the left of the position shown in Fig. 1 when the strip is heated to a certain temperature and to thereby separate contactor 7 and cathode 4;.
In operation, a source of high voltage direct current 10 is connected to anode 2 and cathode 4, the thermostatic strip being connected to the anode through a resist/or 11.
When the discharge device is cold and a pcw-' er switch, not shown, closed, acircuit is completed from the source of'current 10 through resistor 11, heating resistor 5 and cathode 4 to the other side of the current source 10. Current flows in this circuit, heating cathode 4 and the thermostatic strip 6. When the cathode becomes heated to such an extent that strip 6 bends toward the leit'of the position shown in Fig. 1 the strip 6 breaks the electrical contact between contactor .7 and cathode 4. The heating element '5 then assumes a positive potential with reference-to the cathode l and is therefore subject to hombardment by electrons which maintain it at white heat.
If desired, the discharge device may be employed to produce high frequency oscilla: tions for the excitation ofa vapor lamp 9. This may he done by connectin the ends of a transformer winding 12 to the plate and grid members of the tuloe 1, the central point of the transformer winding being connected to f the. cathode. A. secondary transformer winding 13, in inductive relationto winding 12, is connected to a coil 14 surrounding vapor lamp 9. While I have illustrated the discharge device as furnishing a source of high frequency current to lamp 9, it obviously Fig. 1. In Fig. 2 ananode 2, cathode 4,-
heater element 5 and thermostatic strip 6 are mounted in a receptacle 1. A resistance element 11 is connected as inFi 1 between the anode andheater element w ile the. cathode and anode are connected to the secondary winding 15 of a transformer 16 and to a con.-
.Alternating current is supplied to the primary winding 18 of transformer 16 from mains 19. if the discharge device is cold and the power switch (not shown) open, contactor 7 will engage the cathode a so that when the power switch is closed, heating current will sponsive' means a receptacle,
i a rece tacle broken connection whereby flow through resistor 11, Heater 5, cathode {t and condenser 17. When the cathode is heat- "ed to a certain temperature, direct current flows through the tube and in the output circuit 20. The thermostatic strip 6 breaks the contact between the cathode and contactor 7 at a certain temperature, but the temperature.
will be maintained by the electron discharge ing dischar e between the cathode and-heater members whereby each of the latter is maintained at an operating temperature.
In witness whereof, I have hereunto set my hand this 14th day of November, 1927.
ERNST F. W. ALEXANDERSON.
between the cathode and the heating element. 7
What I claim as new and desire to secure by Letters Patent of the United States is '1. An electron discharge device comprising in the receptacle, the cathode including a heater element, said heater element being mounted in the receptacle and electrically connected with the cathode, and current retween the heater element and cathode.
2. An electron discharge device comprising in the receptacle, the cathode including an inner heater element, said heater element being mounted in the receptacle and electrically connected with the cathode, and temperature. responsive means for breaking the contact be tween the inner heater element and cathode.
3. An electron discharge device comprising a cathode and anode, said cathode comprising a hollow cylindrical member, a" heater element mounted in said cylindrical member and electrically connected with said member, and means for breaking the electrical contact between the heater element and cylindrical member.
4. An electron discharge device comprising a receptacle, an anode and cathode mounted in the receptacle, the cathode including a heater element, said heater element being mounted in the receptacle and electrically connected with-the cathode, current responsive means for breaking the connection between the heater element and cathode andmeans for producing a discharge across the the cathode continues to be'heated.
5. An electron discharge device comprising a" receptacle, an anode and cathode mounted in the receptacle, the cathode including an inner heater element, said heater element being an anode and cathode mounted an anode and cathode mounted for breaking the contact bemounted in the receptacle and electrically con- I nected with the cathode, temperature responsive means for breaking the connection between the inner heater element and cathode and means for causing a flow of current between the cathode and heater members whereby the temperature of the latter is maintained.
6. An electron discharge device comprising 'a cathode and anode, saidcathode comprising a hollow cylindrical member, a heater' element mounted in said cylindrical member.
and electrically connected with said member,
means for breaking the electrical connection between the heater element and cylindrical member and means for producing a bombard-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US283722A US1787300A (en) | 1927-11-16 | 1927-11-16 | Electric-discharge device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US283722A US1787300A (en) | 1927-11-16 | 1927-11-16 | Electric-discharge device |
Publications (1)
Publication Number | Publication Date |
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US1787300A true US1787300A (en) | 1930-12-30 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US283722A Expired - Lifetime US1787300A (en) | 1927-11-16 | 1927-11-16 | Electric-discharge device |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2416927A (en) * | 1941-10-13 | 1947-03-04 | Gen Electric | Gaseous discharge device |
US2482495A (en) * | 1943-11-27 | 1949-09-20 | Westinghouse Electric Corp | Magnetron |
US2522259A (en) * | 1948-05-06 | 1950-09-12 | Bell Telephone Labor Inc | Electrode temperature regulation |
US2587303A (en) * | 1946-09-06 | 1952-02-26 | Rca Corp | Mean frequency control of frequency-modulated oscillators |
US2677787A (en) * | 1950-05-08 | 1954-05-04 | Charles V Litton | Electron discharge device cathode assembly |
US2758240A (en) * | 1953-12-30 | 1956-08-07 | Rauland Corp | Electron-discharge devices |
US2813227A (en) * | 1951-10-19 | 1957-11-12 | Rca Corp | Quick heating cathode for electron discharge device |
DE1029489B (en) * | 1955-10-17 | 1958-05-08 | Deutsche Elektronik Gmbh | Temperature-stabilized high-frequency tubes for generating or amplifying very short waves |
US2996643A (en) * | 1959-07-16 | 1961-08-15 | Eitel Mccullough Inc | Art of heating electron tube cathodes |
US3678381A (en) * | 1968-08-19 | 1972-07-18 | Int Plasma Corp | Radio frequency wattmeter |
-
1927
- 1927-11-16 US US283722A patent/US1787300A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2416927A (en) * | 1941-10-13 | 1947-03-04 | Gen Electric | Gaseous discharge device |
US2482495A (en) * | 1943-11-27 | 1949-09-20 | Westinghouse Electric Corp | Magnetron |
US2587303A (en) * | 1946-09-06 | 1952-02-26 | Rca Corp | Mean frequency control of frequency-modulated oscillators |
US2522259A (en) * | 1948-05-06 | 1950-09-12 | Bell Telephone Labor Inc | Electrode temperature regulation |
US2677787A (en) * | 1950-05-08 | 1954-05-04 | Charles V Litton | Electron discharge device cathode assembly |
US2813227A (en) * | 1951-10-19 | 1957-11-12 | Rca Corp | Quick heating cathode for electron discharge device |
US2758240A (en) * | 1953-12-30 | 1956-08-07 | Rauland Corp | Electron-discharge devices |
DE1029489B (en) * | 1955-10-17 | 1958-05-08 | Deutsche Elektronik Gmbh | Temperature-stabilized high-frequency tubes for generating or amplifying very short waves |
US2996643A (en) * | 1959-07-16 | 1961-08-15 | Eitel Mccullough Inc | Art of heating electron tube cathodes |
US3678381A (en) * | 1968-08-19 | 1972-07-18 | Int Plasma Corp | Radio frequency wattmeter |
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