US1667977A - Cathode construction - Google Patents
Cathode construction Download PDFInfo
- Publication number
- US1667977A US1667977A US86388A US8638826A US1667977A US 1667977 A US1667977 A US 1667977A US 86388 A US86388 A US 86388A US 8638826 A US8638826 A US 8638826A US 1667977 A US1667977 A US 1667977A
- Authority
- US
- United States
- Prior art keywords
- cathode construction
- metal
- cathode
- construction
- glass
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
- H01J19/50—Spacing members extending to the envelope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0002—Construction arrangements of electrode systems
- H01J2893/0005—Fixing of electrodes
- H01J2893/0008—Supply leads; Electrode supports via rigid connection to vessel
Definitions
- the object of the invention is to provide a hollow thimble shaped cathode capable of cooperating with the glass seals of a bulb or tube to complete a vacuous enclosurewithout unduly heating the glass seal.
- Fig. 1 is a vertical cross-section of a 7 preferred embodiment of the invention.
- Fig. 2 is a similar'view of a modification.
- cathode proper C is formed pre erably of suitable metal, such as Monel metal in the shape of a hollow thimble, externally rovided with a series of grooves 1 in w ich may be embedded electron emitting material 2.
- a glam sealing portion B is provided which terminates in a uniform flange 4 occupying a plane substantially at right angles to the axis of the ortion C and 1s particularly well adapted both as to metal and physical formation for the fabrication of the s, 1926.
- Serial No. 88,888 is provided which terminates in a uniform flange 4 occupying a plane substantially at right angles to the axis of the ortion C and 1s particularly well adapted both as to metal and physical formation for the fabrication of the s, 1926.
- the preferred metal for the construction of this hollow 3.5 portion B is a suitable alloy of nickel steel such as nickel 60% steel 40%, and its edge I or terminus rim 6 opposite to the sealing edge 4 is preferably as indicated in the drawings and is substantially the same in 40 cross-section as the main portion C.
- an intermediate heat resisting or insulating portion 7 which may be cylindrical as shown in Fig. 1, if it is fabricated of metal, low in its heat conductivity, such as nichrome or nickel steel, or which ma preferably be fluted or corrugated with the formation 8 shown for this similar portion in Fig. 2.
- the referred means of attaching this interme iate portion to the end portion C and B is by means of welds 9 and 10, or by simply soldering with a high temperature solder.
- inventive thought may have a variety of expressions as is contem lated in what I claim and desire to secure li y United States Letters Patent as follows:
- a cathode for vacuum tubes comprising a thimble shaped tip of metal having a substantially cylindrical portion; an outwardly flared glass-sealing flange; and an intermediate portion of low heat conductivity.
Description
May 1, 1928.
A. N. LUCIAN CATHODE CONSTRUCTION Filed Feb. 6. 1926 INVENTOR ARSENE N.x UCIAN Patented May 1, 1 928.
ABSENE N. LUCIAN, OF PHILADELPHIA, PENNSYLVANIA.
GATHODE CONSTRUCTION.
Application filed February This invention relates to cathodes for use intriodes and the like. The object of the invention is to provide a hollow thimble shaped cathode capable of cooperating with the glass seals of a bulb or tube to complete a vacuous enclosurewithout unduly heating the glass seal.
The above and further objects of the invention will better be understood by reference to the illustrative embodiments of the invention described in the following specification in connection with the accompanying drawings which form a part hereof. These illustrative embodiments should be referred to however solely for illustration and not limitation.
In the drawings,
purposes of Fig. 1 is a vertical cross-section of a 7 preferred embodiment of the invention; and
Fig. 2 is a similar'view of a modification.
The thermionically functioning ortion of cathode proper C is formed pre erably of suitable metal, such as Monel metal in the shape of a hollow thimble, externally rovided with a series of grooves 1 in w ich may be embedded electron emitting material 2. A glam sealing portion B is provided which terminates in a uniform flange 4 occupying a plane substantially at right angles to the axis of the ortion C and 1s particularly well adapted both as to metal and physical formation for the fabrication of the s, 1926. Serial No. 88,888.
glass seal or pit 5 between the sealing portion B and glass envelope 3. The preferred metal for the construction of this hollow 3.5 portion B is a suitable alloy of nickel steel such as nickel 60% steel 40%, and its edge I or terminus rim 6 opposite to the sealing edge 4 is preferably as indicated in the drawings and is substantially the same in 40 cross-section as the main portion C. Interposed between the main portion C and its portion B is an intermediate heat resisting or insulating portion 7 which may be cylindrical as shown in Fig. 1, if it is fabricated of metal, low in its heat conductivity, such as nichrome or nickel steel, or which ma preferably be fluted or corrugated with the formation 8 shown for this similar portion in Fig. 2. The referred means of attaching this interme iate portion to the end portion C and B is by means of welds 9 and 10, or by simply soldering with a high temperature solder.
The inventive thought may have a variety of expressions as is contem lated in what I claim and desire to secure li y United States Letters Patent as follows:
A cathode for vacuum tubes comprising a thimble shaped tip of metal having a substantially cylindrical portion; an outwardly flared glass-sealing flange; and an intermediate portion of low heat conductivity.
ARSENE N. LUCIAN;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86388A US1667977A (en) | 1926-02-06 | 1926-02-06 | Cathode construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86388A US1667977A (en) | 1926-02-06 | 1926-02-06 | Cathode construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1667977A true US1667977A (en) | 1928-05-01 |
Family
ID=22198250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US86388A Expired - Lifetime US1667977A (en) | 1926-02-06 | 1926-02-06 | Cathode construction |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1667977A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2437576A (en) * | 1946-07-02 | 1948-03-09 | Quintin J Wick | Flame-heater cathode tube |
| US2456649A (en) * | 1943-06-12 | 1948-12-21 | Glenn F Rouse | Cathode |
| US2459841A (en) * | 1943-06-08 | 1949-01-25 | Glenn F Rouse | Cathode |
| US2534762A (en) * | 1945-08-13 | 1950-12-19 | Epstein Hirsch | Electrode structure for glow discharge tubes |
-
1926
- 1926-02-06 US US86388A patent/US1667977A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459841A (en) * | 1943-06-08 | 1949-01-25 | Glenn F Rouse | Cathode |
| US2456649A (en) * | 1943-06-12 | 1948-12-21 | Glenn F Rouse | Cathode |
| US2534762A (en) * | 1945-08-13 | 1950-12-19 | Epstein Hirsch | Electrode structure for glow discharge tubes |
| US2437576A (en) * | 1946-07-02 | 1948-03-09 | Quintin J Wick | Flame-heater cathode tube |
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