Effect of use upon the quality of iron

✍ Scribed by C.

• Publisher: Elsevier Science
• Year: 1880
• Tongue: English
• Weight: 52 KB
• Volume: 109
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(80)90423-8

✦ Synopsis

~ect of Use on 5"o~. 417 top one will slide off by its own weight at the least inclination of the lower one.

• ~¢[uch of this interposed fihn of air can be displaced by a sliding of one plate on the other, starting, say at one corner, with the plates in close contact, and carefhlly pushing one over the other, holding it the while close to, as if to kee l ) the air out. Then, indeed, an obstinate resistance to sliding will be felt, and the friction of nearer contact will be made thoroughly sensible.

But this way of bringing surfaces into contact has nothing to do with belt action, except to prove the need of a plastic surface on belt and pulley, which will enable them to adhere, while in contact, with sufficient force to prevent sliding, and at the same time be uninfluenced by the intermedium of air.

And lastly, in order to put the matter to actual test, an apparatus was constructed, such that a leather belt was made to slide on the f.lcc of a smooth iron pulley, and also to drive the same iron pulley up to slipping of the belt. In both cases the adhesion or driving power of