JPS5444742A - Constant current circuit - Google Patents

Constant current circuit

Info

Publication number
JPS5444742A
JPS5444742A JP11058277A JP11058277A JPS5444742A JP S5444742 A JPS5444742 A JP S5444742A JP 11058277 A JP11058277 A JP 11058277A JP 11058277 A JP11058277 A JP 11058277A JP S5444742 A JPS5444742 A JP S5444742A
Authority
JP
Japan
Prior art keywords
layer
contact point
load
pdni
life
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
JP11058277A
Other languages
Japanese (ja)
Other versions
JPS6012647B2 (en
Inventor
Hisayoshi Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11058277A priority Critical patent/JPS6012647B2/en
Publication of JPS5444742A publication Critical patent/JPS5444742A/en
Publication of JPS6012647B2 publication Critical patent/JPS6012647B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE: To obtain a multi-layer contact point that is operated surely in any load of heavy or light load, contact resistance is low and the life is long, by forming intermediate Ag layer among PdNi-WC layer on the contact point mother metal and Au layer on the surface.
CONSTITUTION: Cu layer 2 and Ni layer 3 are formed as foundation on Fe group contact point mother material 1, PdNi-WC layer 4 is formed on the layers, furthermore, Ag intermediate layer 5 and Au surface layer 6 are orderly formed and multilayer contact point is manufacture. Cu layer 2 and Ni layer 3 make adhering property of the layer 4 and the mother material 1 to the layer 4, and these are prepared electrolytically by plating method and the like. From this structure, since switching operation is carried out only by Au layer in light load and Au layer is diminished by vaporizing or dispersion to lower layer in heavy load, switching operation can be carried out by PdNi-WC layer, the contact point is surely operated to any load, the abrasion resistant property is excellent and the life can be elongated.
COPYRIGHT: (C)1979,JPO&Japio
JP11058277A 1977-09-16 1977-09-16 constant current circuit Expired JPS6012647B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11058277A JPS6012647B2 (en) 1977-09-16 1977-09-16 constant current circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11058277A JPS6012647B2 (en) 1977-09-16 1977-09-16 constant current circuit

Publications (2)

Publication Number Publication Date
JPS5444742A true JPS5444742A (en) 1979-04-09
JPS6012647B2 JPS6012647B2 (en) 1985-04-02

Family

ID=14539485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11058277A Expired JPS6012647B2 (en) 1977-09-16 1977-09-16 constant current circuit

Country Status (1)

Country Link
JP (1) JPS6012647B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199357A (en) * 1984-03-21 1985-10-08 Tookiyoo Menki:Kk Apparatus for weighing and packing of noodle in frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199357A (en) * 1984-03-21 1985-10-08 Tookiyoo Menki:Kk Apparatus for weighing and packing of noodle in frame
JPH0324188B2 (en) * 1984-03-21 1991-04-02 Tokyo Menki Kk

Also Published As

Publication number Publication date
JPS6012647B2 (en) 1985-04-02

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