| Spon E. & F.N., ltd - 1869 - 402 páginas
...part and working in a circular ratchet on tlio base. Fig. 5839. Brown and Level's boat-detaching hook. The upright standard is secured to the boat, and the tongue, hinged to its upper enJ, enters an eye in the level, which works ou a fulcrum at the middle of the standard. A similar... | |
| Henry T. Brown - 1871 - 168 páginas
...revolution of the arms and buckets with the shaft causes the ring, d, also to rotate upon the eccentric, ahd the action of this ring on the cranks keeps the buckets...are secure until it is desired to detach the boat, when a rope attached to the lower end of each lever is pulled in such a direction as to slip the eye... | |
| Edward Spon - 1873 - 398 páginas
...part and working in a circular ratchet on the base. Fig. 5839. Brown and Level's boat-detaching heok. The upright standard is secured to the boat, and the...apparatus is applied at each end of the boat. The heoks of the tackles heok into the tongues, which are secure until it is desired to detach the boat,... | |
| Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874 - 396 páginas
...part and working in a circular ratchet on the base. Fig. 5839. Brown and Level's boat-detaching hook. The upright standard is secured to the boat, and the tongue, hinged to its upper eml, enters an eye in the level, whicli works ou a fulcrum at the middle of the standard. A similar... | |
| |