JPS5630610A - Bridge girder fall detector - Google Patents
Bridge girder fall detectorInfo
- Publication number
- JPS5630610A JPS5630610A JP10554979A JP10554979A JPS5630610A JP S5630610 A JPS5630610 A JP S5630610A JP 10554979 A JP10554979 A JP 10554979A JP 10554979 A JP10554979 A JP 10554979A JP S5630610 A JPS5630610 A JP S5630610A
- Authority
- JP
- Japan
- Prior art keywords
- bridge
- terminals
- break
- bridge girder
- wires
- 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
Links
Abstract
PURPOSE: To facilitate detection of the bridge girder fall by forming and wiring wires in loop form between bridge griders and bridge piers, and detecting the break of wires.
CONSTITUTION: A plurality of the first distributing board 14 and the second distributing boards each having two terminals in the direction same as the longitudinal direction of the bridge girder are arranged at desired positions of the bridge piers 13 and bridge girders 12, and are connected to each other by wires 11. In the first distributing board 14 disposed at the leftmost side, its two terminals 14A and 14B are termination sealed, but in the first distributing board 14 its two terminals 14A and 14B are respectively connected to the terminals 16A and 16B of the output terminal 16. A sub-controller 20 performs the detection of the break of the wire 11. Where there is a break, it is transmitted to a main controller 30 through a transmission path 50.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10554979A JPS5630610A (en) | 1979-08-21 | 1979-08-21 | Bridge girder fall detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10554979A JPS5630610A (en) | 1979-08-21 | 1979-08-21 | Bridge girder fall detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5630610A true JPS5630610A (en) | 1981-03-27 |
Family
ID=14410646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10554979A Pending JPS5630610A (en) | 1979-08-21 | 1979-08-21 | Bridge girder fall detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5630610A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703408A (en) * | 1983-11-28 | 1987-10-27 | Hitachi, Ltd. | Apparatus and record carrier for optically writing information |
| US5282192A (en) * | 1992-01-30 | 1994-01-25 | Victor Company Of Japan, Ltd. | Optical disc apparatus using 4 separate detection elements with first and second multiplying means |
| US6018510A (en) * | 1997-04-09 | 2000-01-25 | Ricoh Company, Ltd. | Phase change recording medium for allowing a tracking servo control based on a differential phase detection tracking method |
| US6426936B1 (en) | 1998-01-27 | 2002-07-30 | Ricoh Company, Ltd. | Phase-change medium usable in phase-difference tracking |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088807A (en) * | 1973-12-10 | 1975-07-16 |
-
1979
- 1979-08-21 JP JP10554979A patent/JPS5630610A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088807A (en) * | 1973-12-10 | 1975-07-16 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703408A (en) * | 1983-11-28 | 1987-10-27 | Hitachi, Ltd. | Apparatus and record carrier for optically writing information |
| US5282192A (en) * | 1992-01-30 | 1994-01-25 | Victor Company Of Japan, Ltd. | Optical disc apparatus using 4 separate detection elements with first and second multiplying means |
| US6018510A (en) * | 1997-04-09 | 2000-01-25 | Ricoh Company, Ltd. | Phase change recording medium for allowing a tracking servo control based on a differential phase detection tracking method |
| US6426936B1 (en) | 1998-01-27 | 2002-07-30 | Ricoh Company, Ltd. | Phase-change medium usable in phase-difference tracking |
| US6741545B2 (en) | 1998-01-27 | 2004-05-25 | Ricoh Company, Ltd. | Phase-change medium usable in phase-difference tracking |
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