| 发明名称 |
PASSIVE RAILROAD CROSSING WARNING DEVICE |
| 摘要 |
<p>A passive railroad crossing warning device has two input optical windows that receive light from the headlight of an oncoming locomotive. The light is redirected to an output optical window where a combiner causes it to exit at a predetermined angle to make it visible to motorists approaching the railroad crossing.</p> |
| 申请公布号 |
AU1123192(A) |
申请公布日期 |
1992.08.27 |
| 申请号 |
AU19920011231 |
申请日期 |
1992.02.25 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
JOHN FREDERIC DREYER JR.;RICHARD ALLAN MILLER |
| 分类号 |
E01F9/00;G02B5/04 |
主分类号 |
E01F9/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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