JPH032548U - - Google Patents

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Publication number
JPH032548U
JPH032548U JP4144689U JP4144689U JPH032548U JP H032548 U JPH032548 U JP H032548U JP 4144689 U JP4144689 U JP 4144689U JP 4144689 U JP4144689 U JP 4144689U JP H032548 U JPH032548 U JP H032548U
Authority
JP
Japan
Prior art keywords
filament
tips
insulating support
cathode
leads
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.)
Granted
Application number
JP4144689U
Other languages
Japanese (ja)
Other versions
JPH0753246Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989041446U priority Critical patent/JPH0753246Y2/en
Priority to US07/499,700 priority patent/US5057736A/en
Publication of JPH032548U publication Critical patent/JPH032548U/ja
Application granted granted Critical
Publication of JPH0753246Y2 publication Critical patent/JPH0753246Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第一の直熱型陰極を示す断面
図、第２図は同直熱型陰極の要部拡大断面図、第
３図は同直熱型陰極に制御電極を取付けた状態を
示す断面図、第４図は本考案の第二の直熱型陰極
を示す要部拡大断面図、第５図は本考案の第三の
直熱型陰極を示す斜視図、第６図は従来の直熱型
陰極の斜視図、第７図は従来の直熱型陰極の断面
図、第７図はその要部拡大断面図である。 １……絶縁支持体、２……陰極リード、２ａ…
…リード先端、３……フイラメント、４……電子
放射性物質（炭酸塩）、５……接合端部、７……
結合材、９……凹溝。 Figure 1 is a sectional view showing the first directly heated cathode of the present invention, Figure 2 is an enlarged sectional view of the main parts of the directly heated cathode, and Figure 3 is a control electrode attached to the directly heated cathode. FIG. 4 is an enlarged cross-sectional view of essential parts showing the second directly heated cathode of the present invention, FIG. 5 is a perspective view of the third directly heated cathode of the present invention, and FIG. 6 is a sectional view showing the state. 7 is a perspective view of a conventional directly heated cathode, FIG. 7 is a sectional view of the conventional directly heated cathode, and FIG. 7 is an enlarged sectional view of a main part thereof. 1... Insulating support, 2... Cathode lead, 2a...
...Lead tip, 3...Filament, 4...Electron radioactive substance (carbonate), 5...Joining end, 7...
Binding material, 9...concave groove.

補正 平１．８．２４ 図面の簡単な説明を次のように補正する。 明細書第１３頁第１２行目に「第７図」とある
のを「第８図」と補正します。Amendment 1.8.24 Hei 1. The brief description of the drawing is amended as follows. The text "Figure 7" on page 13, line 12 of the specification will be corrected to "Figure 8."

Claims (1)

【実用新案登録請求の範囲】 (1) 絶縁支持体に挿着した一対の陰極リードの
先端間にフイラメントを張設し、該フイラメント
のリード先端との接合端部を含む全長にわたつて
電子放射性物質を塗着したことを特徴とする直熱
型陰極。 (2) 絶縁支持体に挿着した一対の陰極リードの
先端間にフイラメントを張設し、該フイラメント
の少なくとも中央部分に電子放射性物質を塗着す
ると共に、該リード先端との接合端部に耐熱性を
有する結合材を塗着したことを特徴とする直熱型
陰極。 (3) 絶縁支持体の直径方向に凹溝を形成し、一
対の陰極リードをその先端が該凹溝内に露出する
ように絶縁支持体に挿着して、該リード先端間に
フイラメントを張設し、該フイラメントのリード
先端との接合端部を含む全長にわたつて電子放射
性物質を塗着したことを特徴とする直熱型陰極。 (4) 絶縁支持体の直径方向に凹溝を形成し、一
対の陰極リードをその先端が該凹溝内に露出する
ように絶縁支持体に挿着して、該リード先端間に
フイラメントを張設し、該フイラメントの少なく
とも中央部分に電子放射性物質を塗着すると共に
、該リード先端との接合端部に耐熱性を有する結
合材を塗着したことを特徴とする直熱型陰極。[Claims for Utility Model Registration] (1) A filament is stretched between the tips of a pair of cathode leads inserted into an insulating support, and the entire length of the filament, including the joint end with the lead tip, is electron emissive. A directly heated cathode characterized by coating a substance on it. (2) A filament is stretched between the tips of a pair of cathode leads inserted into an insulating support, and at least the central portion of the filament is coated with an electron radioactive material, and the end where the lead ends are joined is coated with a heat-resistant material. A directly heated cathode characterized by being coated with a bonding material that has properties. (3) A groove is formed in the diameter direction of the insulating support, a pair of cathode leads are inserted into the insulating support so that their tips are exposed in the groove, and a filament is stretched between the tips of the leads. 1. A directly heated cathode, characterized in that the filament is provided with an electron emissive material over its entire length, including the joint end with the lead tip. (4) A groove is formed in the diameter direction of the insulating support, a pair of cathode leads are inserted into the insulating support so that their tips are exposed in the groove, and a filament is stretched between the tips of the leads. 1. A directly heated cathode, characterized in that an electron radioactive substance is applied to at least a central portion of the filament, and a heat-resistant bonding material is applied to an end that is joined to the lead tip.
JP1989041446U 1989-02-23 1989-04-07 Directly heated cathode Expired - Lifetime JPH0753246Y2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989041446U JPH0753246Y2 (en) 1989-02-23 1989-04-07 Directly heated cathode
US07/499,700 US5057736A (en) 1989-04-07 1990-03-27 Directly-heated cathode structure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1-20692 1989-02-23
JP2069289 1989-02-23
JP1989041446U JPH0753246Y2 (en) 1989-02-23 1989-04-07 Directly heated cathode

Publications (2)

Publication Number Publication Date
JPH032548U true JPH032548U (en) 1991-01-11
JPH0753246Y2 JPH0753246Y2 (en) 1995-12-06

Family

ID=31717449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989041446U Expired - Lifetime JPH0753246Y2 (en) 1989-02-23 1989-04-07 Directly heated cathode

Country Status (1)

Country Link
JP (1) JPH0753246Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000259105A (en) * 1999-03-05 2000-09-22 Taisei Corp Neon lighting system in building

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS611253U (en) * 1984-06-08 1986-01-07 ソニー株式会社 Directly heated cathode
JPS6353661A (en) * 1986-08-22 1988-03-07 Nippon Telegr & Teleph Corp <Ntt> Cache control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS611253U (en) * 1984-06-08 1986-01-07 ソニー株式会社 Directly heated cathode
JPS6353661A (en) * 1986-08-22 1988-03-07 Nippon Telegr & Teleph Corp <Ntt> Cache control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000259105A (en) * 1999-03-05 2000-09-22 Taisei Corp Neon lighting system in building

Also Published As

Publication number Publication date
JPH0753246Y2 (en) 1995-12-06

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