US697119A - Cam for stamp-mills. - Google Patents

Description

Nb. 697,9. Y Patented Apr. a, |902. d. C. H. VAUGHT. CAM FuA STAMP MILLS.

led u (Application A g 15, 1899. Renewed Sept. 25, 1901.)

(N0 Model.)

UNTTED STATES PATENT OFFICE'.

v JAMES C. H. VAUGHT, OF PHILLIPSBURG, MONTANA.

CAM FOR STAM P-IVIILLS.

SPECIFICATION forming part of Letters Patent No. 697,119, dated April 8, 1902.

Application filed August 15, 1899. Renewed September 25, 1901. Serial No. 76,532. (No model.)

To all whom it may concern:

Be it known that I, JAMES C. H. VAUGHT, a citizen of the United States, residing at Phillipsburg, in the county of Granite and State ofMontana, have invented a new and useful Cam for Stamp-lllills, of which the following is a specification.

The invention relates to improvements in cams for stamp-mills.

The object of the present invention is to improve the construction of cams for stampmills, more especially the means for securing removable shoes to the same, whereby the engaging faces of the cams may be readily removed Wheu Worn Without discarding the entire cam. Y

A further object o' the invention is to provide a locking mechanism which will be so arranged that the pressure or friction resulting from the engagement of the cam with a tappet will operate to hold a shoe irmly in engagement with the body portion of the cam.

Another objectof the invention is to secure the shoes to a cam without employing bolts and nuts or similar fastening devices and to enable the shoes to be quickly detached when desired.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a side elevation, partly in section, showing a cam provided With shoes constructed in accordance with this invention. Fig. 2 is a transverse sectional view on line 2 2 of Fig. 1. Fig. 3 is a detail perspective view of one of the arms of the cam, illustrating the construction of the dovetailed groove. Fig. 4 is a perspective view of one of the shoes. Figs. 5 and 6 are enlarged detail views of portions of the cam and the shoe.

Like numerals of reference designate corresponding parts in all Jthe iigures of the drawings.

1 designates a cani provided with oppositely-disposed arms 2 of the usual form, adapted to engage a tappet of a stampstem, and each of the arms is provided at its curved engaging face with a removable shoe 3, forming a Wear-plate and adapted to receive the wear incident to the engagement of the cam l with a t-appetv and capable of being readily removed and renewed Without discarding the entire cam. The shoe 3, which is curved to conform to the configuration of the adjacent face of the arm of the cam, is provided on its inner face with a curved longitudinal rib 4, formed integral With' the shoe and fitting Within a groove 5 of the cam and detachably inter-locked with the latter. The groove 5 is disposed longitudinally of the curved edge of the arm of the cam, and it is provided at intervals with opposite recesses 6, adapted to receive tapering enlargements or lugs 7, located at opposite sides of the longitudinal rib 4. The recesses 6 are tapering, and the Ilugs '7 form tapering enlargements of the rib 4, as clearly illustrated in Fig. 4 of the accompanying drawings. The transverse shoulders 8 of the tapering recesses 6 are beveled or inclined, the bevel or inclination being from the bottom of the groove 5 toward the inner end of the cam, whereby the shoe is moved outward or in the direction of the outer end of the arm of the cam in introducing the rib into the groove. The side edges of the tapering recesses are undercut or inclined to form dovetailed portions,and the tapering enlargements of the rib have inclined side edges, which are inter-locked by sliding the rib outward longitudinally of the groove. As the enlarged portions or recesses ofthe groove taper toward the outer end of the arm and as the enlargements of the rib are similarly tapered, it Will be clear that the pressure resulting from the engagement of the cam with a tappet Will operate to force the shoe tightly in engagement with the walls of the tapered portions of the groove, whereby the shoe will be effectually prevented from becoming accidentally disengaged from the cam While the stamp-mill is in operation. The transverse shoulders 9 of the enlargements 7 are beveled or inclined to fit the transverse shoulders of the tapering recesses of the groove. After the shoe has been moved outward sufliciently to interlock the rib firmly With the cam it is retained in such engagement by a `plug of soft metal, which is poured into the inner end of the groove While the metal is in a molten condition, and this plug lO, Which may consist of Babbitts metal or any other suitable material, may be read IOO ily extracted when it is desired to remove the shoe. Also, should the shoe be forced outward slightly by the action of the cam against a tappet the plug may be expanded by hammering it.

The invention has the following advantages: The shoe, which is simple and comparatively inexpensive in construction, is adapted to receive the wear resulting from the engagement of the cam with the tappet, and it may be readily removed when it is desired to renew the engaging face of the cam, and it obviates the necessity of discarding the latter. The means for interlocking the shoe with the cam are concealed beneath the shoe, and bolts and nuts and similar fastening devices, which are liable to be struck and injured bya tappet, are not employed. The pressure incident to the engagement of the cam with a tappet tends to draw the shoe outward on the cam, whereby the shoe is held firmly interlocked with the same.

Changes in the form, proportion, size, and the minor details of construction within the scope of the appended claims may be resorted to without departing from the spirit or sacricing any ofthe advantages of this invention.

What is claimed is 1. A device of the class described comprising a cam provided with dovetailed recesses, and a shoe having lugs or enlargements arranged on its inner face and detachably interlocked with the dovetailed recesses, substantially as described.

2. A device of the class described comprising a cam provided at its engaging face with a longitudinal groove having a series ot' tapering recesses with undercut edges, and a shoe detachably interlocked with the cam and provided at its inner face with a rib having tapering enlargements engaging the said recesses, substantially as described.

3. A device of the class described comprising a cam provided with a longitudinal groove having outwardly-tapered dovetailed recesses, and a shoe provided with a longitudinal rib arranged in said groove and having outwardly-tapered enlargements interlocking with the dovetailed recesses, substantially as described.

4:. A device of the class described comprising a cam having a longitudinal groove provided with dovetailed recesses, a shoe having a rib arranged in the groove and provided with lugs or enlargements interlocked with the said recesses, and a plug or key of soft metal arranged within the inner end of the groove and engaging the shoe, substantially as described.

5. A device of the class described comprisinga cam provided with a longitudinal groove having tapering recesses with undercut side Walls and beveled transverse shoulders,a shoe provided with a rib having tapering lugs provided with undercut side edges and beveled end edges, and a plug or key engaging the inner edge of the shoe, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

JAMES C. H. VAUGHT.

Witnesses:

J. Ross CoLHoUN, Y. P. HAHN.

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