US1682642A - Incandescent cathode - Google Patents
Incandescent cathode Download PDFInfo
- Publication number
- US1682642A US1682642A US29526A US2952625A US1682642A US 1682642 A US1682642 A US 1682642A US 29526 A US29526 A US 29526A US 2952625 A US2952625 A US 2952625A US 1682642 A US1682642 A US 1682642A
- Authority
- US
- United States
- Prior art keywords
- wires
- parallel
- cathode
- filament
- incandescent
- 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
Links
- 239000004020 conductor Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
Images
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
- H01J1/15—Cathodes heated directly by an electric current
Definitions
- This invention relates to incandescent cathodes for transmission tubes, which incandescent cathodes are heated by an electric current, more particularly to incandescent cathodes for transmission tubes of comparatively large outputs.
- incandescent cathodes which havethe shape of a hair-pin. If the current in the filaments used for this purpose becomes comparatively heavy, which is the casein transmission tubes of large outputs, the electrodynamic forces acting on the parts of the filament increase to such a degree that these parts take other shapes under the influence of said forces; the two legs of a hairpin-shaped filament, for example, are bent outwards.
- the incandescent cathode consists of a number of substantially parallel parts, which are so arranged relatively to each other and to one or more leading-in wires which are parallel to each other and to the parts of the filament, that the electrodynamic forces acting on the incandescent cathode substantially neutralize each other.
- two parts of the filament and two leading-in wires may be arranged substantially parallel to each other so as to pass through the angular points of such a rhombus that the distance between the leading-in wires a r ranged diagonally opposite each other is 3 times the distance bet-ween the parts of the filament.
- the four elements are further so arranged that the electric currents have substantially-the same value and that'the direction of the currents passing through the two parts of the filament is the same, but is opposite to the direction of the currents traversing the leading-in wires.
- FIG. 1 shows a construction of an incandescent cathode in which two parts of the filament and two leading-in, wires are arranged parallel to each other.
- Figure 2 is a plan of the incandescent cathode with its support as shown in Figure 1.
- Figure 3 is a sectional view of a rectifier arrows) comprising an incandescentcathode accordto Figure 1. f
- the support of the incandescent cathode consists of a metal clip 1, which has two parallel parts 3 and 4 and is carried by a conductor 2.
- a metal rod 5 is secured which carries parts 6 and 7 of a filament which are suspended so as to be, parallel to each other and to the leading-in wires 3 and 4.
- the other ends of'these filaments are secured to a clip 8 which is carried by a conductor 95
- the currents passing through the wires 3 and 4 have the same direction, but have an opposite direction compared with the currents traversing the wires 6 and 7 (see the The distance between the wires 3 and 4 must be about 3 times the distance between the filaments 6 and 7.
- the electric discharge tube shown in Figure 3 which may serve to rectify alternating.
- incandescent cathode of the same construction as is shown in Figures 1 and 2.
- the conductors 2 and 9 are secured to metal hoods 10 and 11 which at their edges are hermetically sealed to glass tubes 12 and 13, which again archermetically sealed to a glass vessel 16.
- the metal hoods 10 and 11 carry leading-in wires 14 and 15.
- a metalvessel 17 which serves as anode is heremetically sealed to the end of a glass vessel 16.
- a cathode for a discharge tube comprising a pair of parallel lead-inwires, a' pair of parallel filament wires parallel to the said lead-in wires and connections so that the current in each pair of wires is in the-same direction.
- a cathode for a discharge tube comprising a pair of parallel lead-1n wires, and lead-in wires also serving as a filament support, a pair of parallel filament wires, and connections so that the current in each pair of wires is in the same direction.
- a cathode for a discharge tube comprising a support substantially rectangular in shape and of conducting material, a leadin connection to said support, a cross bar.
- a cathode for discharge tubes compris in a lead-in wire forming a loop with parthe arms being adapted tosupport a filament, said filaments bein arallel to each other and to the arms, and t e opposite end of the filaments being electrically connected to a second lead-in wire.
- a cathode for discharge tubes comprising a plurality of conductors each adapted to carry equal amounts of current in the same direction, a lead-in connection to one end of said conductors, and a plurality of filaments one end of which is connected to the other ends of the conductors and adapted to carry equal amounts of current in the same direction, and the other end of the filaments connected to a second lead-in wire.
Landscapes
- Golf Clubs (AREA)
- Gloves (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Discharge Lamp (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1682642X | 1924-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1682642A true US1682642A (en) | 1928-08-28 |
Family
ID=19872956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US29526A Expired - Lifetime US1682642A (en) | 1924-05-21 | 1925-05-11 | Incandescent cathode |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1682642A (enrdf_load_stackoverflow) |
| FR (1) | FR597805A (enrdf_load_stackoverflow) |
| GB (1) | GB234442A (enrdf_load_stackoverflow) |
| NL (1) | NL16656C (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634921A (en) * | 1984-07-03 | 1987-01-06 | Sony Corporation | Thermionic cathode heater |
-
0
- NL NL16656D patent/NL16656C/xx active
-
1925
- 1925-01-13 GB GB1092/25A patent/GB234442A/en not_active Expired
- 1925-05-09 FR FR597805D patent/FR597805A/fr not_active Expired
- 1925-05-11 US US29526A patent/US1682642A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634921A (en) * | 1984-07-03 | 1987-01-06 | Sony Corporation | Thermionic cathode heater |
Also Published As
| Publication number | Publication date |
|---|---|
| NL16656C (enrdf_load_stackoverflow) | |
| GB234442A (enrdf_load_stackoverflow) | 1925-12-10 |
| FR597805A (fr) | 1925-11-30 |
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