 | Park Benjamin - Mechanical engineering - 1878 - 994 pages
...Pulley-Slock.— The upper block of the tackle has two sheaves, one a little smaller than Я4Я. 844. the other, fastened together ; they are, in fact,...the chain from slipping round them. The lower pulley consists of one sheave, which is also furnished with a groove. To this pulley the load is attached.... | |
 | Henry Robinson Towne - Cranes, derricks, etc - 1883 - 222 pages
...piece. The grooves are furnished with ridges which prevent the chain from slipping around them. The v lower pulley Q consists of one sheave /which is also...chain performs a part that will be understood by the arrow heads attached to it in the figure. The chain passes from the hand at A up to L, over the larger... | |
 | Henry Robinson Towne - Cranes, derricks, etc - 1883 - 220 pages
...for attachment to a support. The sheave it contains resembles two sheaves, one a little smaller than the other, fastened together ; they are in fact one...with ridges which prevent the chain from slipping around them. The v lower pulley Q consists of one sheave /which is also furnished with a groove, it... | |
 | Park Benjamin - Mechanical engineering - 1884 - 1002 pages
...block of the tackle has two sheaves, one a little smaller than the other, fastened together ; they arc, in fact, one piece. The grooves are furnished with...the chain from slipping round them. The lower pulley consists of one sheave, which is also furnished with a groove. To this pulley the load is attached.... | |
| |
... them. The upper block P is furnished with a hook for attachment to a support. The sheave it contains resembles two sheaves, one a little smaller than the other, fastened together ; they are in fact one piece. The grooves are furnished with ridges... 