JPS5221632A - Closed switch board - Google Patents

Closed switch board

Info

Publication number
JPS5221632A
JPS5221632A JP50097569A JP9756975A JPS5221632A JP S5221632 A JPS5221632 A JP S5221632A JP 50097569 A JP50097569 A JP 50097569A JP 9756975 A JP9756975 A JP 9756975A JP S5221632 A JPS5221632 A JP S5221632A
Authority
JP
Japan
Prior art keywords
switch board
closed switch
increasing
improve
external force
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.)
Pending
Application number
JP50097569A
Other languages
Japanese (ja)
Inventor
Yoshiro Sato
Isao Yoshikawa
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 JP50097569A priority Critical patent/JPS5221632A/en
Publication of JPS5221632A publication Critical patent/JPS5221632A/en
Pending legal-status Critical Current

Links

Landscapes

  • Patch Boards (AREA)

Abstract

PURPOSE: Increasing the natural frequency by getting small the deflection caused by external force, to improve an earth quake-proof property.
COPYRIGHT: (C)1977,JPO&Japio
JP50097569A 1975-08-13 1975-08-13 Closed switch board Pending JPS5221632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50097569A JPS5221632A (en) 1975-08-13 1975-08-13 Closed switch board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50097569A JPS5221632A (en) 1975-08-13 1975-08-13 Closed switch board

Publications (1)

Publication Number Publication Date
JPS5221632A true JPS5221632A (en) 1977-02-18

Family

ID=14195856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50097569A Pending JPS5221632A (en) 1975-08-13 1975-08-13 Closed switch board

Country Status (1)

Country Link
JP (1) JPS5221632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5681011A (en) * 1979-12-07 1981-07-02 Tokyo Shibaura Electric Co Enclosed switchboard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5681011A (en) * 1979-12-07 1981-07-02 Tokyo Shibaura Electric Co Enclosed switchboard
JPS6137843B2 (en) * 1979-12-07 1986-08-26 Tokyo Shibaura Electric Co

Similar Documents

Publication Publication Date Title
JPS5241517A (en) Electronic musical instrument
JPS5221632A (en) Closed switch board
JPS53119656A (en) Forecast coding equipment
JPS526252A (en) Collapsible-type stage device.
JPS5430135A (en) 4-hydroxy-4-methyl-cyclohexene-2-one-1
JPS53108974A (en) 7-arginylamino-4-methylcoumarin
JPS529363A (en) Non-contact relay
JPS5210056A (en) Quartz oscillator
JPS5229348A (en) Umbrella
JPS51116745A (en) Electric top
JPS5337838A (en) Ground directional relay
JPS51132925A (en) Opening distortion conpensation circvit
JPS5283708A (en) Desacyl-pepsidin
JPS51118388A (en) Variable impedance circuit
JPS5290339A (en) Electron game system
JPS5240263A (en) Lever-loaded connection instrument
JPS53112872A (en) Novel 5-fluoro-3-phenylindole
JPS5367851A (en) Filter apparatus
JPS5434172A (en) Electromagnetic-shielding dust-proof constant-temperature chamber
JPS5245037A (en) Protection circuit
JPS53142150A (en) Signal conversion circuit
JPS52119756A (en) Elasticity suppressor
JPS53105478A (en) Novel acetylpeneramide
JPS53144216A (en) Vertical synchronous signal generator circuit
JPS53123034A (en) Keyboard