US4768A - Improvement in machinery for double-seam ing - Google Patents

Description

UNrrEn STATES PATENT Enron.

G. R. MOORE, OF PHILADELPHIA, PENNSYLVANIA.

y IMPROVEMENT uN MACHINERY FOR DOUBLE-Summe.

Specification forming part of Letters Patent No; 4.768, dated September 19, 1846.

To all whom it may concern,.- l

Beit known that I, GEORGE R. MOORE, of the city and county of Philadelphia, and State ofPennsylvania, have invented certain new and useful improvements in double-scanning machines for double-seaming the bottoms of tin pans and other articles made of sheet tin, copper, Snc., requiringa like process and I hereby declare that the following is a full, clear, and exact description of the principle or character which distinguishes them from allother things before known, and of the manner of making, constructing, and using the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a front view.

The same letters indicate like parts in all the figures. l

All the parts that are not lettered compose the frame simply, the construe-tion of which is obvious from the drawings, as it is similar to that of the common machi'nesfor bending tin, and made of the same materials. A sectional drawing, E, shows the end of the frame toward the crank with the boXes in it, which is precisely similar to the common tin-working machines for wiring, turning, Sto. The other end of the frame is precisely similar to Pecks swaging-machine, but the construction of the frame may be varied.

I proceed to describe the working machinery,noticing,frst,the two arbors a and b,whieh are connected by cog-wheels and turned by the crank c. Two heads, d and e, are affixed to the ends of these arbors, and between these heads the double-seaming is performed. A pan, p, is'represented in dotted lines as placed over the head d on the lower arbor, so as to bring the edge which is to be seamed down between the head e and a small roller, f,here

inafter described.l The shape of the head e should be carefully noticed, and is shown in the diagram Fig. 2. This head consists of a ange, l, projecting from a cylindrical surface, 2, similar to some other machines now in use. This cylindrical surface is terminated by a shoulder, 3, that connects with a conical molding, 4. The bevel surface of the head e bears first upon the edge of the pan which is sustained by the head d,(the shoulder 3 above named coming against the bottom,) and the edge is forced to yield to the bevel of the head far down toward the center.

e as this is screwed down upon it by means ofthe screw g, and should any part of it be inclined to slip out toward the top of the pan (as this edge is always composedv of three thicknesses) it is prevented from so doing by the'little roller f, attached" to a collar, 7c, that surrounds the'arbor b near the head. At this stage of the operation the crank c is turned, the pan revolves inthe machine, and the edge is turned down as far as the bevel part 4 of head e will turn it, while the shoulder prevents the edgeof the pan from bending too After this the head e must be raisedy a little by turning a screw, y, attached to its boX, and then the. lever h 1s brought linto use to move the arbor b inward, by which the cylindrical part 2 of the head e, which is parallel with the outer surface -of d, is brought over the same and then screwed down toward it by g, when, by again turning the crank, the work is com! pleted. keeps the bottom of the pan close against the head d. The lever h passes through an aperture in the top ofthe frame, where it has room to be moved back and forth, and places are iitted to receive it when so moved, into which it is thrown by a spring, or by its own elasticity. It also passes between two shoulders on the arbor b, and its lower end is connected with the frame by a pivot. Its use has already been explained. t' is a sliding gage for the purpose of holding in proper position flaring articles, such as the pan represented in the drawings, where the bottom needs to be thrown out from a perpendicular with the arbors in order to bring the body of the pan parallel with them. rIhis gage consists of a shank that is attached by a screw, j, to the frame, and is terminated by a head that is just under the head d. The bottom of the pan is held out by this gage resting against the inside thereof, which keeps the work steady while being acted on. This is found to be in-v dispensable when the work is made daring, as shown in the drawings. The gage is fastened, when set or placed right, by the thumb-screw j, andthe end thereof' is also provided with a soft surface, which prevents its rubbing the tin to scratch or mark i sirable to move the gage, the work will rest against the head d, which is faced nearly to the edgek with leather (although other rua- The outside shoulder, 1, of the head Whenit is not dev terials may be used) to prevent its rubbing the tin. The piece 7a is a collar with a lever attached thereto. The collar part of it is fitted upon the arbor b, allowing the arbor to turn freely in it, While the upper end passes through a loop, c, in the frame to keep it in an upright position, and below the collar is fastened upon a pivot the little roller f. rllhe only use of the loop 7c is to bring rollerf to bear properly upon the Work, and to secure this the better the lever 7c is made crook ed at the top, so that by pressing it down this part of it is brought toward the frame, and consequently the roller f is moved up toward e, and vice versa. A spring, Z, is applied to throw 7c back as it rises up.

y In order that the screw g may not only press down arbor I) by acting upon the boxm, but may also have such a connection with it as to raise it up when its own action is reversed, a bow, o, is provided, which receives the arbor I) and passes up through the box m and the frame, and is connected by a yoke, n, to the gage i, in the manner and for the purpose heretofore described, supporting the inside of the vessel at the bottom while being operated upon when the sides thereof are iaring.

8. The employment ofthe shoulder 3, which terminates the base of the conical part of the head @to keep the bottom in place While making the first bend, as above described.

' GEO. R. MOORE.

Witnesses:

A. l?.v BROWNE, J J. GREENOUGH.

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