US110748A - Improvement in machines for bending metal stirrups - Google Patents

Description

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JOHN H. DE VALIN,YOF BALTIMRE, MARYLAND.

Letters Patent No. 119,748, dated January 3, 1871.

IMPROVEMENT IN MACHINES FOR BENDING METAL STIRRUPS.

The Schedule referred to in these Letters Patent and making part of the same.

description thereof', reference being had to the accom-l panyin g drawing and to the letters of reference marked thereon making a part of this specification.

The nature of my invention consists in the construction and general arrangement of a device for forming stirrups and bending and twisting bars of metal, as'will be hereinafter fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure 1 is a side view,-and Figure 2 is a plan View of my entire machine. A represents the block, with the anges a al at the bottom, the flange a1 being only on one side and the end. These flangesV are for the purpose of securing the block to suitable standards.

a2 represents a shoulder on one end of the block` A, extending'on the two vertical sides and on the top, forming a guide.

a represents a part of' the lblock- A, projecting downward, and of the same thickness as the rest of the block.

a4 represents arecess in the block, which extends from the bottom of the projection a3 to near the top of the block, and of suticient depth to receive the gauge C, making the vertical part thereof even with the side of the block.

a5 represents a hole or slot through the block for Drepresents a bolt screwing intothe nut cl2, and passing vertically through the middle of the block. By a knuckle-joint the bolt D is secured to the clamp B at one end. The opposite end of the clamp B terminates in a handle, which extends beyond the end of the block A. l f

Near each end ofthe block A there is annpright bolt, E E', passing vertically through the block, and secured by means of a nut, e.

The upper ends of the bolts E E extend above the block A, and have slots through them for the reception of a key, L. v

The bolts E E are situated atequah distances from the middle bolt D, and the clamp B has an oblong hole, b2, near the handle b1, so that the clamp can pass freely over the ends of the bolts E E', and the ke)T L pnt into the slot with its under side bearing on the topbt the clamp B. The bolts EE have shoulders resting on the top of the block A.

The gauge() has a slot, o3, in its vertical part c1,

through which a bolt, M, passes and secures it to the I block A. The horizontal part c2 of the gauge extends laterally beyond'the vertical side of the block A, and is of any required length.

The lip-bolt F isl provided with a lip, f1, wings f2, and a key, f. The wings f2 fit Vinto corresponding recesses in the holes in the block, which prevent the' bolt from turning. lhe key f3 is for the purpose of drawing the lip-bolt through the block.

The block A is provided with holes for the receptionzof the lip-bolt F at convenient places in the vicin- .ity of the gauge C.

The'thickness-piece H is provided with lugs and countersunk holes for the purpose of securing it by bolts to the block A. The inner face isv made to lit on thc side of the block A, between the middle and` the shoulder a?, and the same side as the gauge C.

The lug h extends beyond the end ofthe block. The recess h1 ts over the projection a2 of the block.

' There is a shoulder, h4, on the thickness-piece H, which, when Vbolted to its place on the block, comes even with the shoulder a2 of the blookfand serves for a guide in bending the stirrup.

On the opposite side of theblock A the thickness piece K is bolted opposite the piece H, the lug k1 coming opposite the lug k, and the recess k2 iitting over the projection a2. In both cases thetops ot' the thickness-pieces H and K come even with the top ot' the block A.

Ou the same side of the middle bolt, and on the opposite side of the block from the gauge 0,. the thickness-piece G is bolted by means of bolts, the top of said thickness-piece coming even with the top of the block A, the-heads of the bolts in all cases being countersunk so as to make the sides of themachine fair. The operation' of the machine is asfollows:

f The clamp B is raised, and the middle of the bar to be bent is placed in the middle of' the block A, against the shoulder a2 on top. The clamp B is then brought down on top of the bar, and keyed there by means of the key L inthe bolt E. Both ends of the bar are then bent down against the sides of the block A and along the shoulders a2, (the thickness=pieces H K being removed,) thus forming the seat of the stirrup. lhe clamp .B is then unkeyed and raised, and the bent bar taken on" the block. n

The gauge() having been sct to the required distance from the top of the block, the seat of the stirrup is then placed on the top of the horizontal part cz thereof, with the two upright side-pieces of the stirrup against the block A. One side-piece of the 'stirrnp is then secured by means of bringing it under the lip of the lip-bolt F, and keying np the lip-boltV lby means ofthe key f3. The/side-peee is then twisted `and bent down on the top of the block A. The clamp B is then brougbtdown on the stirrup,

and keyed fast by means of the key L in the bolt E.

` The end oi` the stirrup is bent down against the opposite side of theblock A, thus forming one of-t-he straps of the stirrup. The clamp B is then raised and the lip-bolt loosened, and the bar is taken off;- the lip-bolt is reversed, and, if necessary, changed to another hole in the block A; the baris replaced on the block, with its seat resting, as before, on the horizontal part ofthe gauge G, and the other upright side secured by means of the lip-bolt. The bar is t-hen twisted, bent down on the topof the block; the elampB brought down and keyed; the end of the bar bent down on the opposite side of the block A, and the stirrnp is complete.

The block A must not be greater in width than the narrowest stirrup to be made. By'adding thicknesspieces H, K, and G, the stixrup can be made of any desired dimensions. 4

Having thus fully described my invention,

Vhat I claim as new, and desire to secure by Let` ters Patent, is

1. In combination with the block A, constructed as described, with flanges a al, shoulders a?, projection a, and recess ai, the slotted gauge O, adjustedih the recess a* by means of' the screw M, and the lip-boit F, provided with lip f1, wings f2, and key f, all slibstantialiy as and for the purposes vherein set forth.

2. The, combination of the block A, bolts D E Ef, clamp B, vgauge C, lip-bolt F, .and with or without the thickness-pieces H K G, all constructed and arranged as described, to operate substantially as and for the f purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 21st day of J nly, 1870. J OHN` H. DE YALIN.

Witnesses:

J. H. W. ONION, J. M. MASON.

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