US555534A

US555534A - Ments

Info

Publication number: US555534A
Authority: US
Publication date: 1896-03-03
Anticipated expiration: 1913-03-03

Description

(No Model.)

S. SCHNEIDER.

' 0AM. I

No. 555,534. Patented Mar. 3, 1896.

' Witnesses: Inventor M 4 Attorney and through block 4 and firmly clamping the UNITED STATES SIDNEY SCHNEIDER, OF ST. LOUIS, MISSOURI, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO SIDNEY SCHNEIDER AND A. FRITSCH, OF SAME PLACE.

CAM.

SPECIFICATION forming part of Letters Patent No. 555,534, dated March 3, 1896.

Application filed August 22, 1 8 9 5.

To all whom it may concern.-

Be it known that I, SIDNEY SCHNEIDER, of St. Louis, Missouri, have invented certain new and useful Improvements in Cams for Stamp- Mills, of which the following is a specification.

In the cams for stamp-mills, where a number of cams are secured to the cam-shaft, the removal of a broken or worn-out cam involves considerable delay and difficulty owing to the necessity for stripping the shaft to permit of the removal or placing of an intermediate cam. Such is the case where the cams have solid eyes fitting upon the shaft. Open or divided cams, designed to permit of more'ready placing or removal, appear thus far to have developed inherent weaknesses in structure or misbehavior in operation, the cams being weak, resulting in frequent breakage, or the attaching devices rattling loose under the severe shocks of work, resulting in breakage or in frequent delays for readjustment.

My invention provides a cam which is readily separable from the shaft without disturbing the other cams or the shaft, and which has practically the strength of a solid cam, and which is not liable to derangement from shocks.

My improvement will be readily understood from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a side elevation of my improved cam; and Fig. 2, an edge elevation of the same, showing the edge which appears at the left in Fig. 1. Fig. 3 is a detail perspective View of the bearing-block, it being for purposes of perspicuity transposed relatively to the position it occupies in the other views.

In the drawings, 1 indicates the hub of the cam 2, the lobes projecting therefrom and formed integrally therewith; 3, parallel jaws forming tangential extensions from the hub 1, which hub encompasses but one-half of the shaft, the jaws 3 with the hub 1 therefore forming an open-sided hub which can be passed over the shaft; 4, a block fitting snugly between the jaws 3 and having-its inner end formed in completion of the semicircular bore of hub 1; 5, a bolt passing through jaws 3 two parts of the general structure together;

Serial No. 560,090. (No model.)

6, tongues formed upon the edges of block 4, parallel with the axis of the cam, and engaging grooves extending across the inner walls of jaws 3 7, the bore of the cam, formed half 5 5 in the hub 1 and half in block 4, this bore to fit the shaft on which the cam is to be employed, and S a cut-away portion forming a shoulder or bearing which is the continuation of that general contour-line of the cam as it crosses the gap filled by block 4.

It is desirable, in order to get the maximum stroke of the battery-stamps within a given diameter of cams upon the cam-shaft, that the inner ends of the cam-faces approach and lie as near the shaft as possible. Within the limits of safe and practical construction this point is coincident with the hub-faces of the cams. Such construction within this rotary path of the cam-lobes as will permit their maximum throw is secured by extending the open hub-jaws to one side of the cams and cutting away that portion of the bearing-blo ck 4 in the plane of the lobes, so that a shoulder 8 is formed constituting a part of the cam- 7 5 face and coincident therewith.

Assume hub 1 and jaws 3 to be absent. Then block 4 would fill the gap in the cam proper and be held by tongues 6, which extend through the cam as well as through jaws 3. In such assumed case the cam would be well held to the shaft by its usual keys and the block could only be displaced by a sidewise motion, owing to the tongues 6; but the gap in the cam would weaken it. This is remedied by the jaws 3 and bolt 5, the jaws reinforcing the gapped cam and increasing the length of bearing of the cam upon the shaft, and bolt 5 clamping the jaws and block firmly together into a rigid structure. 0 To remove the cam from the shaft it is only necessary to remove bolt 5 and then remove block 4 by sliding it sidewise, the distance between neighboring cams being sufficient to permit this sidewise displacement of the 5 block. -When the block is removed the cam may be taken from the shaft in an obvious manner.

It will be observed that, while the cam is readily removed-from or placed on the shaft without disturbing the shaft or other cams, it has practically the strength of a solid cam,

and that the structure is not liable to disorganization by any displacement of parts as the result of shocks.

It is to be observed that my device looks to two things: first, the convenient attachment of the cam detachably to the shaft, and, second, the securing of a degree of strength which will render such convenient attachment practical in the peculiar work of stampcams. The sliding-block system of attachment has been used for open pulleys, but in such application there was not present the problem of strength. In my construction the bolt 5 provides as a tension element a strength in the general structure practically equal to that of a solid cam. Looking at Fig. 1 and assuming the upper lobe of the cam to be lifting the stamp-stem, it will be obvious that bolt 5 is subjected to tensional strain, the gap between the jaws of the hub tending to open, block 4 in such case adding no strength to the structure; but when the cam has so turned that the lower lobe comes uppermost then the strains upon the block are compressive and the block becomes an element of strength and the bolt is for the time being idle. The working strains tending to disrupt the cam are therefore imposed upon and met by the bolt and block alternatively as the two lobes respectively go into action. As a mere fastening the gappcd cam, in conjunction with the block and the keys, would be sufiicient, but the addition of the side hub 1 with the jaws and bolt to one side of the plane of the cam and the corresponding side extension of the block provide the needed strength without interfering with the working contour of the cam.

I claim as my invention- In a stamp-cam, the combination of oppo sitely-projecting cam-lobes, an open-jawed hub formed therewith and extending outwardly from the cams at one side, opposite cam-faces upon the lobes coincident with the face of the hub, a bearing-block fitting said open jaw and having a eut-awayportion forming a shoulder-bearing coincident with and a continuation of one of the cam-faces of the lobes, and means for locking the block in the aw.

SIDNEY SCHNEIDER.

\Vitnesses:

J. W. SEE, SAM D. FITTON, Jr.