| 摘要 |
A locking mechanism comprising an inner ring, a shaft inserted into said inner ring, the shaft and ring having transverse bores which are aligned, a first pin in said aligned bores and a first pin lock for preventing withdrawal of said pin from said bores, slots in said ring and said shaft through which access can be had to said pin, groove in the outer surface of said ring, an outer ring, the two rings being co- axial, a transverse bore defined by the outer ring, a second pin in said transverse bore of the outer ring, part of said pin lying in said groove of the inner ring, a slot in said outer ring which is transverse by said second pin and through which access can be had to said pin, and a second pin lock for preventing withdrawal of said second pin from the bore of the second ring. |
