US1135289A - Metallic hoop. - Google Patents

Description

T. JOHNSON.

METALLIC HOOP.

non men 1 Eatenteol Apr. 13, 1915.

ii'nrrnn snares raarnnir opinion.

THOBWALD JOHNSON, 03F CHICAGO, ILLINOISo METALLIC noor. a

menses.

Application filed Gctober 18, 1811.

To all whom it may concern:

Be it known that I, THORWALD JoHNsoN, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful lmprovements in Metallic Hoops, of. which the following is a full, clear, and exact specification.

My invention is concerned with metallic hoops for barrels, kegs, casks, etc., and is designed to produce an extremely simple hoop that can be cheaply constructed, and that will be superior to those heretofore proposed.

Where a comparatively thin metal hoop is employed, as is desirable for some kinds of barrels, it is necessary to thicken the driving edge in some manner, and it has usually been proposed to do this by folding over that edge. So far as I am aware, however, the resulting hoop has, in every instance, had its stave-engaging surface either straight in cross section or else slightly convex, with the result that when the hoop is applied, it engages the staves along its center line, rather than at its edges, as it should to get an efiective grip on the wood. Not only is the grip of the hoop on t e staves ineffective, but the edges stand out from the wood, especially the thin edge toward the largest diameter of the barrel, with the result that in handling the barrel this edge of the hoop is engaged by any projections that may be presented to the surface of the barrel, and the hoops are speedily loosened or knocked off. To overcome all these difficulties, I have invented the hoop illustrated, in which the stave-engaging face is slightly concave in cross section, so that when it is applied, its edges must engage the staves and thus insure the desired grip on the wood, as well as prevent them from projecting so as to be accidentally engaged and knocked off.

To illustrate my invention, I annex hereto a sheet of drawings, in which,

Figure 1 is a side elevation of a portion of a barrel or keg equipped with my invention; Fig. '2 is an enlarged detail showing the shape of the hoop in cross section before it is applied; and Fig. 3 is a similar view showing the hoop after it is applied to the barrel.

In the drawings, A represents a barrel made up of the customary staves, and B represents my improved hoop seen in cross section. In the specific embodiment illus- Specifieation of Letters Patent.

Patented Apr, 13, 11%15.

Serial No. 655,412.

t rated it is made of thin metal, and the portion extending from the plain lower edge 1 to the angle 2 is flat, or substantially so (except for the curvature due to the length of the hoop), while the upper, inner portion extending from the angle 2 to the angle 3 is rolled at such'an angle to the lower portion that there is a pronounced concavity in the stave-engaging face, as seen in cross sec tion, especially before it has been placed on the barrel. While the actual amount of the concavity has been slightly exaggerated in the drawing to direct attention to it, yet in practice I make the depth of the concavity substantially equal to the thickness of the metal strip composing the hoop. To form a thickened driving portion on the upper edge, I preferably turn over the outer, upper portion which extends back to the angle 2, and its edge 4; engages the outer surface so as not to project beyond the plane of the outer surface of the lower portion extending from the edge 1 to the angle 2.

i Vhen a hoop of the design shown is applied to a barrel, as seen in Fig. 3, it will be noted that it engages the barrel at its inner edges only, and that when the hoop is forced in place, by driving it by means of tools or machinery applied to the angle 3, while the degree of the concavity may be lessened, it still remains, so that the edges constitute the engaging portion of the hoop, with the result that it grips the wood with great firmness, and cannot be readily detached. lhe form shown in cross section, when the hoop is in place, presents no edges that extend away from the wood and form surfaces that can be readily engaged by projections with which the barrel may come in contact as it is handled.

While hoops embodying my invention are useful in all positions on the barrel, they are especially designed for use on the ends of barrels which are shipped to users with the heads in place. When they are received and are to be filled, the uppermost hoop has to be knocked off so as to loosen the head, which is then removed, the contents inserted,

and the head and top hoop replaced. Where an ordinary hoop is employed, with the engaging surface originally flat, by the time it has been removed and replaced, it is made so convex on its engaging surface that it barely engages the staves at the center line of the hoop, and numerous nails have to be driven into it to hold it on the barrel and keep the head in place. With my improved ture, a hoop for wooden barrels, formed of a single strip of thin Sheet-metal with a thickened driving portion on its edge of lesser diameter formed by folding over that edge of the metal until it engages the opposing Qpnigs of ,thispatent may :be obtained fqr and as a result, even after the hoop surface and forms a flattened fold, and with its plain edge of greater diameter adapted to engage the staves, an angle being formed alongthe central line of said hoop so that the stave-engaging face is slightly concaved as shown so that it engages the staves at its edges only and any pressure applied to the angle at the central'line of the hoop tends to cause the hoop to flatten and its edges to engage the staves more firmly.

In witness whereof, I have hereunto set my hand and affixed my seal, this 13th day of October, A. D. 1911.

THORWALD JOHNSON. [1,. s.]

Witnesses:

JOHN HOWARD MOELROY, MILDRED ELSNER.

five cents ea hnby addressing the Commissioner of Patents, Washington, I). C.

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