US9445A - Machinery for - Google Patents

Description

N4 PET ERS. PHoTo-LITHOGRAFHER, WASHINGTON. Dv CA UNITED STATES PATENT QFEICE.

EDVV. L. GAYLORD, OF NEWARK, NEIN JERSEY.

MACHINERY FOR BENDING CARPET-BAG- FRAMES, &C.

Specification of Letters Patent No. 9,445, dated December '7, 1852.

To @ZZ whom t may concern:

Be it known that I, EDWARD L. GAYLORD, of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Machinery for Forming Carpet-Bag Frames; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a plan or top view of a machine for forming carpet bag frames, constructed according to my improvements. Fig. 2, is a longitudinal vertical section of the same. Fig. 3, is a transverse vertical section of the same taken in the line of Fig. 2, looking in the direction of the arrow shown on the said figure; Fig. 4, is an elevation of one of the clamps detached from the machine showing the inner side, and Fig. 5, is a front end view of the same.

Similar letters of reference indicate corresponding parts in each of the several figures.

This machine is designed principally for the bending of carpet bag frames, which require their outer edges to correspond eX- actly in form. In the machines now in use for the same purpose, the inner edges are bent to corresponding form, and as the bars from which they are formed are most frequently not of uniform width throughout, the outer edges after bending do not correspond with each other, and require to be hammered or otherwise manipulated to make them do so.

The object of this machine is to bend the outer edges to an exactly corresponding form and throw all irregularity or unevenness to the inner edges.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

A, is a stationary table or bench having a perfectly plane or straight upper surface, it is supported upon standards B, B, and is nearly of the intended length of the straight parts of the finished bars.

C, C, are a pair of unconnected jaws or clamps for holding the bars to be bent consisting of flat metal bars of about the same length as the table A, and placed edgewise above the same; they are recessed all along the lower part of their inner faces, as shown at a, a, in Fig. 3, to a depth somewhat less than the thickness of the bars to be bent,

and to a height less than the width of the same; each has a lug D, attached which passes freely through an opening provided for it in the table. In the lugs D, I), under the table, there are bearings in which a shaft E, rests, the said shaft carrying an eccentric or cam F, which is always caused by a spring G, secured under the table and pressing upward under the lugs, to rest against the under side of the table. The spring Gr, keeps the clamps raised from the table, unless they are depressed by turning the eccentric F, which has a lever H, attached to its shaft to turn it when necessary. The clamp C, is not required to move laterally, and is held by a spring b, against two stops c, c, which stand up above the table. The clamp C, requires a lateral movement, which is given in the direction toward C, to grip the work, by the downward motion of a wedge I,Vwhich works in a suitable guide and operates upon the end of a slide bar J, bearing against the outer side of C', and working transversely to the latter in a guide K, on the table. The wedge is caused to act upon the clamp at suitable times by pressure upon a treadle L, conected to it by a rod M, but is thrown up when not required to be in operation, by a spring d, at tached to the treadle. The clamp C, when the wedge is not in operation is always thrown away from C, by a spring 7J, which keeps it always in contact with the innerend of the bar J, and keeps the outer end of the latter always in contact with the wedge. The back end of both clamps are kept from getting out of place vertically or laterally by guards c, c, (best shown in Fig. 8). The front ends of the clamps are furnished with movable pieces N, N, which are dovetailed to them so as to slide longitudinally; and between the backs of the movable pieces and the main parts of the clamps are placed wedges f, f, of an angle of 450, which are also dovetailed to keep them in place. The movable pieces are held back by springs g, g, attached to them, and to the other parts of the clamps, when not pressed forward by the wedges f, f, their inner faces are recessed to form a continuation of the recesses c, a, in the parts C, G, of the clamps, part of the top and back l, 2, (see Fig. i) of the said recesses, being in the form of the bend of the inner edge of the bent bars when the latter are of proper width, and being moreover an arc of a circle. rIhe front ends of the movable pieces are formed in arcs described from the same centers as l, 2, and to which the lower edges of C, C, form tangente.

To the front end of the table A, is hinged the bending plate O, which when in the position shown in black in the drawings forms a continuation of the table, and is kept Lfrom descending by any suitable means. The turning point or pivot .71, of the hinge is in the line of the center of the are in which the bend is to be made. To the upper face of the bending plate, is secured a fixed clamp P, whose face is in line with the recessed part of C; and a movable clamp P, is pivoted to 0, the said movable clamp being thrown away from P, the fixed clamp, by a spring z', when not drawn toward it by the `wedge Q, whose operation is substantially similar to that of I, it being provided with a suitable rest j, and being attached to a lever R, whose fulcrum is at le, under the bending plate.

The operation of bending the bars into proper form, is conducted in the following manner. The two bars to be bent being previously heated at the part to be bent are placed edgewise on the table A, between the clamps C, C, with the part to be bent, on the bending plate O. (See S Fig. 2, which represents one of the bars.) rlhe operator then by pressing his foot upon the treadle closes the clamps and by pushing froward the lever H, with one hand, causes them to be brought down with the upper' sides of t-he recesses a, a, upon the upper edges of the bars, and by the application of suitable force straightens the bars edgewise and flatwise, and holds them firmly together and with their lower edges parallel-the independent downward motion of the two clamps allowing them to adjust themselves should there be any difference in the width of the two bars. The bases of the wedges f, f, are brought by the downward pressure of the clamps, to bear upon the table and force the movable pieces N, N, out to a proper position, which will vary with the width of the bars. The wedges are so adjusted that the distance between the edge or side l, 2, of the recess in the movable pieces and the face of the bending plate will always be the same as that between the upper side of a, a, and the table, and as the angle of the wedges is 4150, as the latter distance varies they cause the former to vary correspondingly. If the two bars S, are of uniform width the edges or sides l, 2, of the recesses in the movable pieces will be even with each other or in a line parallel with the center line of the hinge, but if the width of the bars differs the positions of the movable pieces differ also. The operator still keeping the pressure of his foot en the treadle, and his power applied to the lever H, with his disengaged hand raises the back end of the lever R, which first draws down the wedge Q, and tightens the clamps P, P', and then raises the bending plate which moves in an arc and bends the two bars to that form, and as its face is parallel transversely to that of the table, the outer edges of the two bars must be exactly parallel both in the straight and bent parts. 1When one end of the bars is thus bent, the bending plate is thrown back, and the treadle and lever H, released and the bars taken from between the clamps. I

The opposite ends are then heated and the bars again placed in the clamps, with the ends already bent, even with each other: and the bending operation is repeated as before.

I do not confine myself to the use of any particular mechanism for closing the clamps, and gripping the bars C, C, nor for drawing them down upon the edges of the bars. But

Vhat I claim as my invention and desire to secure by Letters Patent, is-

The employment for the purpose of bending and forming carpet bag frames or for bending two or more flat metal bars edgewise for any purpose, of a pair of clamps C, C, each moving independently of the other in the direction of the width of the bars, and having recesses a, a, and self adjusting movable pieces N, N as described, combined in any way substantially as set forth with a table A, and bending plate O.

E. L. GAYLORD.

Witnesses:

O. D. MUNN, Trios. MAHON.

Images