US1758516A - Gas-filled tube - Google Patents
Gas-filled tube Download PDFInfo
- Publication number
- US1758516A US1758516A US154212A US15421226A US1758516A US 1758516 A US1758516 A US 1758516A US 154212 A US154212 A US 154212A US 15421226 A US15421226 A US 15421226A US 1758516 A US1758516 A US 1758516A
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- US
- United States
- Prior art keywords
- envelope
- tube
- gas
- filled
- mercury
- 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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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel
Definitions
- This invention relates to gas-filled tube signs, and more particularly to blue colored gaseous tubes.
- I attaln-this object by providing external instead of internal electrodes. on the tube.
- such tubes provided with'external electrodes run cold.
- the tube is filled with a rare gas, preferably argon or helium, or a mixture ofboth, and a small quantity of mercury amalgam is introduced within the transparent envelope of the device.
- a rare gas preferably argon or helium, or a mixture ofboth
- mercury amalgam is introduced within the transparent envelope of the device.
- Various amalgams. may be used and I obtained good results with copper and sodium amalgams.
- the discharge tube is protected against impurities that may be evolved during its operation by means of an internal electrode in the form of a thin copper wire which'is connected with. one of the external electrodes in the manner described in my co-pepding applicain within said envelope and connected with tion Serial No. 147,298, filed November 9, 1926.
- the mercury amalgam may be obtained by rubbing some mercury on the internal copper electrode, which will amalgamate with the copper during the cleaning-up
- a tube constructed in accordance with the present invention is illustrated in cross-section in the accompanying drawing in which 1 is the glass or other transparent or translucent tube, 2 and 3 the external electrodes, and 4 the internal or'clean-up electrode. 5 indicates the mercury amalgam.
- tubes constructed in this manner will easily start, operate for several thousand hours without refilling, and maintain their characteristic bluish color at any temperature down to about 0 F. Below 0 F. the color of the tube turns to violet.
- the temperature of the glass envelope remains constantly substantially that of the surrounding atmosphere. If the envelope is of uranium glass,then during the operation of the tube, the blue colored gas appears within a green frame and presents a particularly pleasing effect.
- a translucent envelope filled with a rare gas, a sodium mercury amalgam in said envelope, two external electrodes and one internal electrode for said envelope, and a connection between said internal and one of said external electrodes.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
my 13, 1930- w. F. HENDRY GAS FILLED TUBE Filed Dec. 11 1926 Patented May 13,1930
UNITD oFFIcE? WILLIAM F. HENDRY, 01E OSSIN'ING, NEW YORK, ASSIGNOR TO MANHATTAN ELEC- TRICAL SUPPLY COMPANY, INGI, A CORPORATION OF MASSACHUSETTS GAS-FILLED TUBE This invention relates to gas-filled tube signs, and more particularly to blue colored gaseous tubes.
In order to obtain a blue colored tubesign 5 it has been the practice to introduce mercury into a neon-filled glass or other transparent or translucent envelope and, by means of internal electrodes, create an electrical discharge which will ionize the gaseous content of the tube. The mercury is vaporized at high temperatures created by a high tension discharge, and this will give the tube its characteristic blue color. If such sign tubes are subjectedtotemperature changes, then the running temperature of the tube has to be high enough to prevent solidification of the mercury at the minimum temperature prevailing in the place, because otherwise an advertising sign which is blue at noon may turn orange (the color of ionized neon) in the evening. Tubes Which are operated at such high temperatures constitute a fire hazard and the glass envelope is subjected to the danger of erackin it hit by a sudden rain squall. It has even. een suggested to provide pyrex glass tubes for such signs.
It is the object of the present invention to provide a gaseous discharge tube which will have a bluish color'when in operation, and
the functioning ofwhich remains practically unaffected by tom erature changes in the surrounding atmosp ere.
In accordance with the present embodiment of the invention, I attaln-this object by providing external instead of internal electrodes. on the tube. As well known, such tubes provided with'external electrodes run cold. After exhaustion the tube is filled with a rare gas, preferably argon or helium, or a mixture ofboth, and a small quantity of mercury amalgam is introduced within the transparent envelope of the device. Various amalgams. may be used and I obtained good results with copper and sodium amalgams. The discharge tube is protected against impurities that may be evolved during its operation by means of an internal electrode in the form of a thin copper wire which'is connected with. one of the external electrodes in the manner described in my co-pepding applicain within said envelope and connected with tion Serial No. 147,298, filed November 9, 1926. The mercury amalgam may be obtained by rubbing some mercury on the internal copper electrode, which will amalgamate with the copper during the cleaning-up process, or it may be introduced in the form of an amalgam into the vessel itself.
A tube constructed in accordance with the present invention is illustrated in cross-section in the accompanying drawing in which 1 is the glass or other transparent or translucent tube, 2 and 3 the external electrodes, and 4 the internal or'clean-up electrode. 5 indicates the mercury amalgam.
I have found that tubes constructed in this manner will easily start, operate for several thousand hours without refilling, and maintain their characteristic bluish color at any temperature down to about 0 F. Below 0 F. the color of the tube turns to violet. The temperature of the glass envelope remains constantly substantially that of the surrounding atmosphere. If the envelope is of uranium glass,then during the operation of the tube, the blue colored gas appears within a green frame and presents a particularly pleasing effect.
What I claim is:
1. In a discharge tube, a translucent envelope filled with a rare gas, a sodium mercury amalgam in said envelope, two external electrodes and one internal electrode for said envelope, and a connection between said internal and one of said external electrodes.
2. In a discharge tube, a translucent envelope filled with helium, a mercury amalgam in said envelope, two external electrodes for said envelope, and a third electrode projecting within said envelope and connected with one of said external electrodes.
3. In a discharge tube, a glass envelope filled with helium, a sodium-mercury amalgain in said envelope, two external electrodes for said envelope, and a copper wire projecton? of said external electrodes.
In testimony whereof, I have signed my name to this specification this 7th day of December, 1926.
WILLIAM F. HENDRS/F. m
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US154212A US1758516A (en) | 1926-12-11 | 1926-12-11 | Gas-filled tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US154212A US1758516A (en) | 1926-12-11 | 1926-12-11 | Gas-filled tube |
Publications (1)
Publication Number | Publication Date |
---|---|
US1758516A true US1758516A (en) | 1930-05-13 |
Family
ID=22550459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US154212A Expired - Lifetime US1758516A (en) | 1926-12-11 | 1926-12-11 | Gas-filled tube |
Country Status (1)
Country | Link |
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US (1) | US1758516A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2465414A (en) * | 1946-04-04 | 1949-03-29 | Harold W Abshire | Gaseous discharge device |
US2654042A (en) * | 1949-07-29 | 1953-09-29 | Gen Electric | Integrally capacitively ballasted discharge lamp |
DE1036395B (en) * | 1957-03-28 | 1958-08-14 | Iapatelholdia Patentverwertung | Controllable electrical discharge vessel filled with mercury vapor and process for its manufacture |
US3562629A (en) * | 1968-03-04 | 1971-02-09 | Michel Troubetzkoi | Tube filled with ionized gas forming a resistor-capacitor unit |
US5013966A (en) * | 1988-02-17 | 1991-05-07 | Mitsubishi Denki Kabushiki Kaisha | Discharge lamp with external electrodes |
US20050253523A1 (en) * | 2004-05-14 | 2005-11-17 | Yi-Shiuan Tsai | Fluorescent lamp for backlight device |
US20060138958A1 (en) * | 2004-12-24 | 2006-06-29 | Junghyun Yoon | Fluorescent lamp, method of manufacturing the same, and backlight unit having the same |
-
1926
- 1926-12-11 US US154212A patent/US1758516A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2465414A (en) * | 1946-04-04 | 1949-03-29 | Harold W Abshire | Gaseous discharge device |
US2654042A (en) * | 1949-07-29 | 1953-09-29 | Gen Electric | Integrally capacitively ballasted discharge lamp |
DE1036395B (en) * | 1957-03-28 | 1958-08-14 | Iapatelholdia Patentverwertung | Controllable electrical discharge vessel filled with mercury vapor and process for its manufacture |
US3562629A (en) * | 1968-03-04 | 1971-02-09 | Michel Troubetzkoi | Tube filled with ionized gas forming a resistor-capacitor unit |
US5013966A (en) * | 1988-02-17 | 1991-05-07 | Mitsubishi Denki Kabushiki Kaisha | Discharge lamp with external electrodes |
US20050253523A1 (en) * | 2004-05-14 | 2005-11-17 | Yi-Shiuan Tsai | Fluorescent lamp for backlight device |
US20060138958A1 (en) * | 2004-12-24 | 2006-06-29 | Junghyun Yoon | Fluorescent lamp, method of manufacturing the same, and backlight unit having the same |
US8021206B2 (en) * | 2004-12-24 | 2011-09-20 | Lg Display Co., Ltd. | Fluorescent lamp, method of manufacturing the same, and backlight unit having the same |
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