US73496A - breed - Google Patents

Description

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IMPROVEMENT IN WOOD-BENDING MAOHINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, D. F. BREED, of Valparaiso, in the county of Porter, and State of Indiana, have invented a new and improved Wood-Bending Machine; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, and letters marked thereon, making a part of this description, in which- Figure 1 is a perspective representation of my invention.

Figure 2, a longitudinal sectional elevation of the same.

Figure 3, a perspective view of the cams operating on the drum, and used to prevent a lateral spread of the wood while being bent.

Figure 4, a central section of the drum and the parts operating thereon.

Figure 5, a broken plan view of the frame of the machine, the bed on which the wood rests, and the adjustable guides used to hold the same during the process of being-bent.

The nature of my invention relates more especially to that class of machines designed for bending ploughhandles, but may be successfully used for bending sleigh-runners and other purposes; and its general character is as follows:

A metallic drum is made adjustable and to revolve, by means of bearings and a lever, in two upright standards, attached to a main frame, and having suitable slots and keys, for thepnrpose of allowing said drum to be raised or lowered, to suit the thickness of stuff to be bent; and in making a side bearing on the cylinder, for holding one side of the curve to be bent, and arranging a stationary and revolving band, having cams, for the purpose of clamping the wood closely, so as to prevent its being crushed out late rally, and render the article imperfect; and in the use of a compound inflexible form, arranged to work on the convex side of the wood to be bent, the outer part of said form having a hook, arranged to move in a groove in the cylinder above men tioned as a guide, and operate in combination with the inner part of the form and a fleitible strap, having ahook at the curved end, for the purpose of bending and holding the wood in place until it is in a suitable condition to be removed; and, further, in the use of a substantial bed, upon which are made to operate adjustable guides, for directing the course of the wood while passing under the cylinder, and in arranging a follower to slide in the main frame, press against the straight end of thegvood, and prevent the convert side from being stretched more than the concave side is compressed.

- It will be seen, from this description, that provision is made for clamping the wood on all sides,.necessary to prevent it from breaking or spreading, and that the devices 'used to accomplish this are made. adjustable, thus making my machine very convenient for t-hepurpose designed.

In, order to give a correct understanding of my dcvice, I have marked corresponding parts with similar letters, and will now give a detailed description.

A A represent a substantial frame, resting upon legs, B, which supports my device, and is made in the usual manner, except the standards G, which are made to pro ect far enough upward to support a drum, D, having bearings,-passing through slots, E, made through said standards transversely with frame A A, for-the purpose of allowing the drum to be raised or lowered, according to the thickness of stall to be bent, keys, F, being made to pass through'standards C, at the top of the bearings of the drum, and hold it in the required position. A stationary ring or. band, it, is attached to drum D, by means of screws or otherwise, as seen in figs. 1, 3, and 4, and has one or more cams, a, used, in combination with revolving band I, having a similar reverse cam, for the purpose of allowing the latter, when turned on drum D, by means of a handle, K, to press against the stuff to be bent, and prevent it from spreading. This arrangement I consider new and very important; and, to make it fully efiicient, I put a stationary band, G, fig. 1, near the opposite end of said cylinder from h, in order that that part of the wood to be bent may be carried forward in a vertical plane with that part required to be straight. Two projections, J, figs. 1 and 4, are also attached to about one-half of the periphery of the drum 1), the space between them being used to guide the curved end L, or the pointedpart of the outer part of the compound form. This is important. Otherwise this part of the device might have a lateral motion, and carry the end of the wood to be bent out of a vertical line. A rod, in, is fastened to projections 0, figs. 1 and 4, and made to run parallel with the axis of drum D, and is used for the attachment of a slotted draw-plate, P, one end of which is made to move under the drum with the wood when being bent, and the otherto carry forward the follower Q, (figs. 1 and 2,) to which it is attached. This follower has arms, S, (same figures,) arranged to slide in grooves, R, and also a mortise or slot in the top, in which is fitted a. clamp, V, made to operate against the straight ,end of the stuff to be bent, by means of levers, T and U, the former being attached to follower Q-by. means of a joint, and the latter attached to said clamp V and lover T, (also by means of a joint,) and at such points as will give a suitable leverage for holding the wood in'place.' A bed-plate, 2, figs. 2 and 5, is made to rest on cross-ties, 3, and used to support'and guide stuff, in combination. with adjustable guides, 4, (figs. 1 and.

5,) whether of uniform or uneven thicknesses; and, to operate said guides independently, I have attached two rods, W, to them, only one of them being shown at fig. 2, and to two lovers, Z, figs. 1 and 2, hung" to a rod, 5,

first figure, by which means one or both guides 4 may be held against the stuff, as its thickness or position on bed-plate 2 may require. The inner half, 6, of the inflexible form is made to remove with the bent stuff, while the outer part, H, fig. 2, is a stationary fixture; and, in order to successfully hold the stuff during its removal, I use the common flexible strap 7, fig. 2 and drawing Z, having a hook, 8, (at its extrenii.ty,) in combination with said inner form 6, a common clamp, 10, a lever, 11, and loop 12, by which means the stufi', after being bent,

can be immediately removed without risk, as the book 8 has been already firmly lira-\vn against the end of the bent part.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The slotted plate P, in combination with the rod m and drum D, operating substantially as and for the purpose set forth.

2. The adjustable guides 4, rods 'W, levers Z, bed-plate 2, bands H and I, arranged to guide the stuff to be bent, and to prevent a lateral motion,.constructed and operating substantially and for the purposes described.

' :o. F. BREED.

Witnesses:

GEO. L. CHAPIN, A. HAYWARD.

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