US66884A

US66884A - Improvement in drop-presses

Info

Publication number: US66884A
Authority: US
Publication date: 1867-07-16
Anticipated expiration: 1884-07-16

Description

@aos tetes steeg@ JQHN. CQ RHODES, 0l" SOUTH ABINGTON, MASSACHUSETTS.

Letters Patent lV'o. 66,884. dated `J'ulz/ 16, 1867.

IMPROVEMENT IN DROP-PRESSES.

dite Srlgchnlc rcfcmh tu in tlgrs ettets ntnit mit making part sf' the snm.

TO ALL WHM IT MAY CONCERN:

Be it known that I, JOHN C. RHODES, ofv South Abington, in the'oounty of Plymouth, 'and State of Massa chusetts, have invented :L new and improved Drop-Press; 'and I do hereby declare that the following isnI full clear, nud exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The drswing represents n. front elevation of my improved drop-press. l

This invention relu-tes to a. drop-press whichis so arranged that the rebound of the drop will be caught..` and that the drop must be raised a. certain height before it can be dropped. Inmost presses there is n rebound of the drop after the saune has fallen, and the snuie ngrtinVV falls upon` the die unless prevented. The impression l alreadyT obtained is generally injured by the rebound, ns the pressed piece has sprung partly out oi the die. ln

presses operated by foot, or by other manual power, the operator does not always, on account of carelessness, v raise the drop to the height required end necessary to obtain n perfect impression. My invention is intended to overcome all these difficulties.

A represents a. hed,'on which afrume, B, of suitable construction and materizilris erected, es shown .inthe drawin A dro C, slides u and downbetwecn the u ri hts B, :1nd she es the metal that ma. be laced u un g P P P S P .Y P P the die D. To one side of the drop is secured e ratchet-bnr, d, the lowertoothb of which projects beyond lh other teeth, es shown. A pnwl, c, having two arms, und a. lip, e, on the outside, is pivoted to nn upright, and one of its arms is pressed against the rutcheta by a. spring` d. After the drop has come qdown the rebound will be caught, that is, the upper arm of the puwl c will engage'the teeth of the ratchet, and will hold the drop up and prevent it from falling a second time upon the same pieeo oi' metal. The blue outline of' the drop and the blck'pawl in the drawing show the position of them after the rebound. For a. new stroke the drop musi be raised until the lower projecting-tooth b throwthe pawl out of the ratchet und brings its outer lip e below the end of the spring d. The pawl and drop will -then be in the position that is indicated by red lines inthe drawing. The drop is then free to fell, end as the tooth b comes against the lower end of the pawl it throwsir back, and the end'of the spring d is again brought below the lip e, und the. pawl is then,-ns well as the dropnn the position shown by black lines in the drawing. The tooth b, it will be seen, acts both to throw the puwlin and out of the ratchet. By varying the length of the upper arm of the pawl the distsnce at which the bmp will fall can be controlled so as to accurately obtain the desired blow. This can be done either by using different pawls, or by having end pieces to be screwed or otherwise fastened to the end of the upper arm.

- What I claim` as new, andf'desire to-secure by Letters Patent, is-

The drop C, provided with a ratchet-bar, a, and with a. projecting-stud, b, in combinationv with the double armed pawl, c, and spring, ci, Iell made and operating `substantially as herein shown alud described.

JOHN C. RHODES.

Witnesses:

v W. H. Hossmj', Iene W. Guns.