发明名称 |
SAFE ANGLE GUIDE GAUGE FOR USE IN CLIMBING LADDERS |
摘要 |
A device for determining if a ladder is at a safe angle comprises a casing having a face plate mounted therein. The face plate has an indicator pivotally connected thereto. The indicator has a central axle extending through the face plate, a counterweight affixed to an inner end of the axle behind the face plate and a pointer affixed to an outer end of the axle. The face plate has an outer surface tha t is provided with visible markings to which the pointer may point to indicate whether a ladder to which the device is attached is set at a safe angle.
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申请公布号 |
CA2513243(A1) |
申请公布日期 |
2007.02.08 |
申请号 |
CA20052513243 |
申请日期 |
2005.08.08 |
申请人 |
PARTRIDGE, CHARLES BERNARD |
发明人 |
PARTRIDGE, CHARLES BERNARD |
分类号 |
E06C7/00;G01B3/56;G01B5/24 |
主分类号 |
E06C7/00 |
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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