发明名称 |
Illumination device and method of use in tunnel alignment |
摘要 |
The present invention relates generally to illumination devices and method of use in tunnel alignment. More particularly, the present invention relates to an illumination device producing a concentrated directional light beam adapted for verifying the center plane of a boring in an underground mine passageway. The illumination device includes a first elongated portion having a longitudinal axis. An arangement for fastening the first portion to a support is provided at a first end of the first portion. A second portion rotatably received by the first portion includes a light source for producing a directional light beam. The light beam is adapted to be directed away from the longitudinal axis of the first portion. An arrangement for retaining the second portion in a predetermined angular position with respect to the axis of the first portion is also provided. In a preferred embodiment, the second portion is telescopically received within the first portion and includes a hinge arrangement which permits pivotal movement of a holder for the light source relative to a segment of the second portion to a location substantially perpendicular to the longitudinal axis of the first portion.
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申请公布号 |
US4463986(A) |
申请公布日期 |
1984.08.07 |
申请号 |
US19810328714 |
申请日期 |
1981.12.08 |
申请人 |
SODDER, JR., GEORGE;COSTA, DOMINICK |
发明人 |
SODDER, JR., GEORGE;COSTA, DOMINICK |
分类号 |
G01B11/27;G01C7/06;(IPC1-7):E21D9/00 |
主分类号 |
G01B11/27 |
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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