Untitled record

Application filed November 9,1903. Serial No. 180,431. (No model.)

To all whom it may concern:

Be it known that I, Charles Grotnes, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, 5 have invented certain new and useful Improvements in Hoop Flaring and Sizing Machines, of which the following is a specification.

In the production of a barrel-hoop the ends of a piece of band iron or steel are united by xo rivets or in any other suitable manner. The hoop thus formed requires to be given a true circular shape, stretched to proper size, and given the necessary degree of flare.

The object of this invention is the produc15 tion of improved means for thus treating the rough or unfinished hoops as they come from the riveter.

In the accompanying drawings, Figure 1 is a vertical central section through a hoop-f orm20 ing machine embodying the features of my invention, said view being taken on the plane of dotted line 1 1 of Fig. 2. Fig. 2 is a top plan view of said machine. Fig. 3 is a fragmental view showing one of the expanding members 25 in front elevation. Fig. 4 is a fragmental view illustrating the means for supporting the expanding members.

In the construction of a hoop flaring and sizing machine embodying my invention I pro30 vide a supporting-frame comprising two end frames 1 and a circular bed-plate 2, secured in any suitable manner to the upper ends of said end frames. Formed integral with said bedplate is a central upwardly-extending tubular 35 stem 3, the bore of which stem is produced through said bed-plate.

A drive-shaft 4 is journaled in bearing-boxes 5, secured toone edgeof each of theend frames 1, which drive-shaft carries at one end, outside 40 the supporting-framework, a fixed drive-pulley 6 and a loose pulley 7. Intermediate its ends and between the end frames 1 the driveshaft 4 has fixed rigidly thereto a pinion 8, which pinion is adapted to mesh with a spur45 gear 9, secured upon a shapt 10. The shaft 10 is rotatably mounted in suitable bearings in the. end frames 1 and centrally of the supporting-frame is provided with a crank 11.

refers to a plunger slidably mounted within the upwardly-extending tubular stem 3 of 5 the bed-plate 2, which plunger is arranged to be reciprocated within said stem by means of a pitman 13, pivotally connected with the lower end of said plunger and with the crank 11 of the shaft 10. The upper end of the plunger 55 12 is reduced, in diameter, providing a shoulder 14, and said reduced portion is screwthreaded to receive a head 15, having a central aperture 16, which aperture is screw-threaded to correspond with the threads upon the upper 6 ' end of the plunger. 12. This head is of truncated-cone form and is provided in its upper an'd lower faces with central recesses 17 and 18? respectively, the upper recess 17 being adapted to receive a nut or collar 19, having 65 a screw-thread engagement with the threaded portion of the plunger 12, and the lower recess 18 receiving the shoulder 14 of said.plunger. The head 15 is thus securely fixed with relation to the plunger. 7°

Arranged upon the upper face of the bedplate 2 concentric with the tubular stem 3 is a series of base-blocks 20—in this instance ten in number. Each of these base-blocks is provided with a stud 21 at its inner end, for a 7 5 purpose to appear hereinafter, also with two upwardly-extending ears 22, which ears arc perforated to provide bearing-openings 23. Between said ears the upper side of the baseblock is cut away in the recess 24. The base- 80 blocks 20 are adjustably secured to the bedplate 2 by-means of clamping-plates 25 of substantially triangular outline, each of said plates lying between two adjacent base-blocks 20. A clamping-bolt 26, provided with a nut 85 27, extends through the bed-plate 2 and each clamping - plate 25 for clamping the baseblocks 20 to said bed-plate. On its lower side and at two of its side edges each clampingplate has a rabbet 28, adapted to receive one 90 edge of the adjacent base-block and to serve as a guideway during the adjusting movement of the block.

Segmental expanding members 29 are arranged in a circle concentric with the head 15, 95 each of said expanding members being pivotally mounted upon one of the base-blocks 20. The expanding members each have an expand752,153 ing-face 30 and a stem 31, provided near its lower end with trunnions 32, adapted to lie in the bearing-openings 23 of the base-blocks 20. The lower end of the stem 31 is rounded and 5 lies within the recess 24 of the base-block;

Rearward of its expanding-face each member 29 has two ears 33, between which ears is rotatably mounted ? roller 34, adapted to bear upon the conical face of the head 15. A coilio spring 35, secured at one end near the upper end of the expanding member 29 and at its other end to the stud 21 of the base-block 20, tends to hold the roller 34 in contact with the head 15.

Adjustable.guides for the barrel-hoop are located at substantially equidistant points upon the periphery of the circular series of expanding members. I have shown three such guides in tfie drawings; but it will be under20 stood that any suitable or convenient number may be employed. Each of these guides is mounted upon one, 29^x, of the expanding members 29, said members 29^x being each provided upon their forward sides below their· ² 5 expanding-faces 30 with a guide-support 36, formed integral with said expanding member. The face of said guide-support 36 is alined with the expanding-face 30, and said support has a screw-threaded opening 37. A guide 3° 38 of angular form, comprising the horizontal member 39 and the downwardly- extending member 40, is adjustably secured upon said support 36 by means of a screw 41, extending through an elongated slot 42 in the down35 wardly-extending member 40 and entering the screw-threaded opening 37 in the support 36.

In operation power is communicated to the mechanism through the medium of a belt extending over the drive-pulley 6. The machine 4° is placed in operation with the head 15 in its lowest position, and consequently with the expanding members 29 in their retracted position. The barrel-hoop to be shaped is placed upon the faces of the expanding members, 45 said hoop resting upon the guides 38. The machine is then started, the upward movement of the head forcing the expanding members 29 outward against the resistance of the coil-springs 35 and the hoop being formed. 5° The hoop is thus trued, stretched to size, and given its proper flare.

The guides 38 are moved up or down upon their supports 36 to receive hoops of different diameters. The degree of flare to be given 55 the hoop is varied by moving the base-blocks 20 toward or away from the center of the bedplate 2, the clamping-bolts 26 being loosened to permit of such movement and tightened again when the base-blocks have been properly 00 positioned.

It is apparent that adifferent number of expanding members and hoop-guides from that shown and described herein may be employed and that many other changes may be made without departing irom the spirit and scope 65 pt my invention, wherefore I desire to have it understood that I do not limit myself to the precise details herein set forth.