| 摘要 |
<p>An automatic gadget for creating a safety lift-shaft in lift or goods-lift apparatus consists of untied rafter 1, hinged at its base and at the extreme of beam of guide 2 is being pushed to an inclined position by spring 7 with the help of lever 6 which is hinged to the rafter; and bolt 4 functions with the help of spring 9 when door A is opened, and the bolt is pushed to the hole of a slit which is on lever 6 for maintaining the said rafter in an erect position for the free movement of cabin B.</p> |
