USRE17929E - of milwaukee - Google Patents

Description

l. M. JONES APPARATUS FOR STRETCHING SKINS AND LEATHER Jan. 13 Original Filed Aprll 9. 1925 2 Sheeltzsshlezgzlg e 6 5 Zig, 1.

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Re. 17 5 2 Sheets-Sheet Original Filed April I Jan. 13, 1931.

gril/1711111 iti Reissued Jan. 13, 1931 ECE IRA MILTON JONES, 0F MILWAUKEE, WISCONSIN, ASSIGNQR T0 CARL A.. BECHSTFIN AND EVIALD E..KORNETZ, OFMILW'AUKEE, WIFSCONSIN APPARATUS FOR STRETGHING- SKINS AND LEATHER Original No. 1,632,551, dated June V14, 1927, Serial No. 21,830, filed April 9, 1925. Application for reissue led April 6, 1929.

This invention has as a general object the simplification and lightening of apparatus of the character described in order to facilitate their handling and to cheapen their cost of production.

Another object of this invention resides in the provision of an apparatus for stretching and drying skins, leather and'other materials having a plurality of attaching surfaces arranged for movement in a common plane, a driving or operating member and connections between the driving and operating mein ber for effecting simultaneous movement between the attaching surfaces.

It is another object of this invention to provide an improved apparatus orframe for stretching and drying skins, leather and other materialshaving aplurality of Work engaging surfaces and guide means on which the work engaging surfaces are so mounted as to be movable in a common plane and individually adjustable.

A further object of this invention resides in the provision of means permittingl rotational motion of the, attaching members whereby the distribution of stresses on the skin, leather or other material being stretched is automatically' equalized.

Vith the above andy other objectsin View which will appear as thedeseription proceeds, my invention residesinthe novel construction, combination and arrangement of parts substantially as hereinafter described und more particularly defined by the appended claims, it being understood that such changes in the precise embodimentof the hereindisclosed invention maybe made as come within vthc scope of the claims.

In the accompanying drawings, Ihav-e illustrated two complete examples of the physical embodiment of my inventionconstructed according to the best modes I Khave so far devised forthe practical application of the principles thereof, and in which:

Figure 1 is a View, partly in section and partly in elevation, of an improved frame constructed in accordancewith my invention, a skin or other material heingillustrated in dotted lines as attachedthereto;

Figure :Ziis a fragmentary, sectional `view imei-als designate like brace or guide rods Yframe being covered with Serial No. 353,232.

Ytaken vthrough Figure 1 on-the plane'ofthe line 4-flg Figure 5 is a front elevational view of a Vslightly modified forni of my invention;

Figure (i is an enlarged fragmentary sectional vieiv taken through Figure 5 on the piane of the line 6-6; and

Figure 7 is a fragmentary detail sectional vicw taken through Figure 5 on theplane of 5the line 7-7.

VReferring now more particularly `to the accompanying drawings in which like nuparts throughout ythe several views, the numeral 5 designates a rectangular supporting frame preferably constructed of angle iron and reinforced at its corners by corner pieces or castings 6 and `positioned centrally of the frame 5 is a casting or housing 7 Wh ich is mounted in place by pairs of brace rods 8 providing guides for the members 9, to be later described. The 8 are arrangedin pairs and have their inner ends threaded in the central casting or housing 7, as at 9', and their outer ends suitably secured in the corner members 6.

Siidably mounted on each pair of brace or guide rods 8 is a cross-head 1U on Which ,thc frame members 9 are rotatably mounted, each cross-head being preferably in Ythe form of a casting or other construction having two parallel guide openings 11 therein through which its supportingrbrace or guide rods 8 siide. Each framemember 9 ispreferably constructed from angle iron 12 and, in the present embodiment, is of rectangular shape with the inner-most corner cut away, the

a. foraminous meinber 13 which provides an attaching surface.

Extended inwardly from thesides of each frame are braces 14 which firmly mount an annular ring 15 at a medial point,;the inner periphery of the ring being counter-bored to provide an inwardly projecting fiange 16 which engages in an annular channel or groove 17 formed between the extended peripheral edge portion 18 ot a clamping plate 19 and the adjacent cross-head 10, the clampin ,o plate 19 being removably secured to the cross-head by bolts or other means 20. This arrangement firmly mounts each frame 9 in the frame 5 for movement radially ot the casting or housing 7 and permits an individual rotational motion of each frame 9 about the axis of its cross-head, and at the same time retains the frames in a common plane at all times.

The movement of the frames 9 is coordinated by a driving or operating member 21 rotatably mounted in the casting; or housing 'i' by a pivot bolt and adapted to be rotated by an actuating shaft 23, the inner end of which is threaded in an internally threa ded sleeve 24 eccentricallv fixed to the driving or operating member by a pivot bolt 25. The outer end of the shaft 23 rotatably, but nonlonnitudinally shittably, supported from one side angle member of the frame 5 by a socket member 26 splined thereto, as at 27, and journaled in a socket bearing Q8 suspended from the adjacent frame side. The outer end ot the shaft 23 is squared, as at Q9, for convenience in applying an actuating crank thereto and. as Will be readily apparent, rotation of the shaft to screw the inner end thereof in the sleeve 24 tends to rotate the driving: or operating member 21 in a clockwise direction With respect to Figure 1 and a rotation of the shaft in a reverse direction tends to rotate the member 21 in a counterclockwise direction.

The rotational movement ot the drivingr or operating member 21 is transmitted to the frames 9 by connectingr members or toggle links 30, the inner ends of which are eccentrically, pivotally connectedL with the mem*- ber ill by crank pins 31 carried thereby to one side of its axis and the outer ends of the links are nivotally connected, as at 32. to the cross-heads 10. `@ne ot the lnen'ibers 30 has its inner end ecccntrically connected With'the d riving or operating member 21 bv the pivot f2.5 securing the threaded sleeve 24 thereto.

In operation the skin, leather or other material to be stretched, designated 33, is yattached to the apparatus by hooks or other members 34 which are engaged with the ed ges of the material and in the apertures oit' tbe attaching surface. She-.tt 23 is then rotated to thread its inner end into the sleeve 24 rotating the operating,r or driving member Q1 in a clockwise direction with respect to Finure 1 causing the members 30 to move the Ytrames 9 outwardly toward their positions illustrated in Figure 1, stretching the ma terial as will be readily apparent. Should the operator in placing material 33 on the frame dispose unequal strains thereon, the

" Vmembers 9 independently rotate about the cross-heads 10 to equalize the strains as Will be readily7 apparent.

In that form of my invention illustrated in Figures 5, 6 and 7, the construction is identical with that illustrated in Figures 1 to 4, inclusive, except that the frames 9 are held against rotation and the construction thus materially simplified and ligfhtcned. The Jframes 9 in'this form ot my invention are slidablv mounted on the ,snide rods 8 by slides 35 tired to the opposite ends ot the frame 9 which slidably engage the rods. The toggle linlrs 30 for engagingr the driving or operating member with the frames 9 have their outer ends pivotally connected with the inner-most slide members, as at 36, and the operating shaft 23 is connected with the mem ber 21 by a beveled gear 37 fixed to its inner end and meshed with a bevel gear 38 iixed to the member Q1. The inner ond of the shaft 23 in this form of my invention is journaled in a bearing 39 formed on the pivot pin 22 of the member 21 and the outer end of the shaft 23 is journaled in a bearing Ll() suspended from the adjacent side of the trame 5.

The operation of this form of my invention is identical with that form illustrated in Figure 1 with the exception that the trames 9 are held against rotational movement andA therefore, a further detail description thereof is deemed unnecessary.

lVhat I claim as my invention is:

1. An apparatus of the character described, comprising a plurality of trame members having work engaging surtacese means mounting the frame members 'for movement in a common plane, an operating member, means rotatably mounting the operating member medially of the frame members, c-onnectinU members having their inner ends eccentriczilly connected with the operatingl member and their outer ends connected with the frame members, whereby rotation ot the operating members moves the frame members in a common plane, and means opere able from one side ofthe apparatus tor retaty ing the'operating member.

2. A napparatus for stretching skins and leather comprisingr a main supporting frame structure, a plurality oi movable frame members substantially Within the main support ing frame structure, guide members in the frame structure radiating from theV center thereof and mounting the trame members for movement in a common plane, an open ating member mounted in the main trame structure between the frame members, and connections between the operating member and the frame members whereby actuation of the operating member moves the trame members in a common plane.

3. An apparatus of the character described, comprising a main supporting frame structure, a plurality of movable frame lofi members substantially Within the main supporting frame structure, guide members in the frame structure and radiating from the center thereof for mounting the frame members for movement in a common plane, a housing mounted in the main frame structure betvveen the frame members, an operating member journaled in the housing, and connecting members having their inner ends eccentrically secured to the operating meinber and their outer ends connected with the frame members whereby rotation of the 0perating member moves the frame members on the guide members.

4. An apparatus for stretching skins and leather, comprising a plurality of frame members having Work engaging surfaces. means mounting the frame members for movement only in a common plane and permitting rotation thereof on an axis transversely of the plane of movement, an operating member mounted medially of the frame members, means connecting the operating members with the frame members, and means for driving the operating member whereby its motion is transmitted to the frame members to produce movement thereof iu a common plane.

5. An apparatus for stretching skins and leather, comprising a main supporting frame structure, guides mounted in the main frame structure, crosssheads slidably mounted in the main frame structure by the guides, frame members having work engaging surfaces, means mounting a frame member on each cross-head, an actuating member mounted between the frame members, and means connecting the actuating member with the cross-heads, wherebyv operation of the actuating member causes movement of the frame members in a common plane.

An apparatus of the character described, comprising a main supporting frame structure, guides mounted in the main frame the main frame structure by the guides, frame members having Work engaging surfaces, means mounting a frame member on each cross-head for rotation on an axis transversely of the guides, an actuating member mounted betveen the frame members, and means connecting the actuating member with the cross-heads, whereby operation of the actuating member causes movement of the frame members in a common plane.

7. An apparatus for stretching skins and leather, comprising a plurality of frame members having work engaging surfaces, means mounting the frame members for movement only in a common plane and permitting rotation thereof on an axis transversely of the plane of movement, and means for producing movement of the frame members in a common plane.

8. An apparatus for stretching skins and leather comprising a hub member, guide means radially extended from the hub member, a plurality of movable frame members having work engaging surfaces, means connecting the frame members With the guide means whereby the frame members are movable in a common plane, an operating member, means mounting the operating member in the hub member, and means connecting the operating member with the frame members whereby actuation of the operating member moves the frame members in a common plane.

9. An apparatus of the character described comprising a main supporting frame structure, guide means Within the frame structure, a plurality of movable frame members having Work engaging surfaces, means connecting the frame members with the guide means whereby the frame members are movable in a common plane, and means for producing relative movement between the frame members.

10. An apparatus of the character described, comprising a rigid main supporting frame structure, guide means Within the frame structure and fixed with respect thereto, a plurality of frame members having Work engaging surfaces, means mounting the frame members from the guide means `whereby the frame members are movable in a common plane and individually adjustable, and means for moving the frame members.

ll. An apparatus for stretching skins and leather comprising a rigid main supporting frame structure, guide members located Within the frame structure and fixed With respect thereto, a plurality of movable frame members having work engaging surfaces, means for connecting the frame members with the guide members whereby the frame members are movable in a common plane, the line of movement of the guide members beingr radial with respect to a point medial of the main frame structure, and means for moving the frame members.

12. An apparatus of the character de scribed comprising a rigid supporting frame structure, guide means Within the frame structure and fixed with respect thereto, a plurality of movable frame members having work engaging surfaces, means for connecting the frame members with the guide means whereby the frame members are movable in a common plane, and means for moving the frame members in a radial line With respect to a point medial of the frame structure.

In testimony whereof I have hereunto affixed my signature.

IRA MILTON JONES.

CERTIFICATE OE CORRECTION.

Reissue Patent No. 17,929. Granted January 13, 1931, to

IRA MILTON JONES.

lt is hereby certified that the name of the second mentioned assignee in the above numbered patent was erroneously written and printed as "Ewald E. Kornetz", whereas said name should have been written and printed as Ewald E. Kornitz, as shown by the records of assignments in this office; and that the said Letters Patent shouId be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 17th day of February, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents.

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