US77312A

US77312A - peckham

Info

Publication number: US77312A
Authority: US
Publication date: 1868-04-28
Anticipated expiration: 1885-04-28

Description

W. H. PEGKHAM.

' MACHINE FOR BBNDING RINGS.

Patented Apr. 28, 1868.

Ira/"Wafer flatten. tetra gaunt ffite.

Letters Patent No. 77,312, dated April 28 1868.

IMPROVEMENT IN MACHINES FOB. BENDING RINGS.

an anon crank in in flgttt fitters smmant uniting 1nd at it: t me TO ALL WHOM IT MAY CONCERN;

Be it known that I, WILLIAM. H. PECKHAM, of the city, county, and State of New York, have invented a new and improved Machine for Bending Rings j and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the some, reference being had to the accompanying drawings,- forming part of this specification. in which-- Fignr'e l represents an end elevation of my improved ring-bending machine.

Figure 2 is a side elevation of-the same.

Figure 3 is a detail horizontal section of the same, the plane of section being indicated by the line aux, fig. 1.

Similar letters of reference indicate corresponding parts, I

This invention relates to a new machine for bending metal bars into perfect and correct rings, of any suitable diameter.

. Theinvention is particularly intended for jewellers use, to formfingr-rings, bracelets, and other suitable articles, but may, if desired, be used with equal advantage for shrinking tires and other large and heavy rings. The invention consists in the use of two rollers, between which the bar to be bent is held, and in the use of two adjustable friction-rollers, which, as they are held-nearer to or further from the pointatwhich the ring is held, form rests for the bar to be bent, by which the same is transformed into a smaller or. larger ring as may be desired. I

'The adjustable friction-rollers are fastened to curved slides, which move in curved guides, and-which are connected by means of pivoted rods to cranks projecting from the faces of 'two gear-wheels, meshing into each other. Thus, as one of the gear-wheels is turned by suitable mechanism, its crank is broughthigher or lower,-

as may be desired, and Slide is' thereby mo ved up or down at will, the other gcar-wheelimoving its slide in.

exactly-thc samc manner.

The ends of the bar to be bent will, when the parts are correctly adjusted for the length of the bar, be brought exactly against each other, so that they can be easily .connectedby soldering orotherwise.

The-annoying and inconvenient'hammering and adjusting by means of which rings were heretofore formed is altogether done away with by my invention. I I

A represents the frame of the machine. 13 .Q are two horizontal axles, having their hearings in the frame, and geared together, so as to revolve in opposite directions. 7

The ends of the shafts B Cproject beyond one end of the frame, as shown, so-that a bar can be placed between them. Oneof the axles rests-in up-and-down.adjustable bearings, a a,- which can be raised and lowered by means of screws 6 b, or their equivalents. The object of the improvementis to allow the insertion, between the shafts, of bars of difierent thicknesses. I I

Upon that face of the frame from which the ends of theaxles B 0 project, are arranged curved guides c'c, concentric around the lower axis 0, as is' clearly shown in figl-l. These guides may either be formed by projectingrails, by sunk grooves, or otherwise, as may bedesired, I I

Uponorwithin these guides c c are placed curved slldes'd d ene on each side of the axle C,- each slide carrying a projecting friction-roller, D D, near its upper end. The lower parts of theslides are, by means of rods e a, connected with two gear-wheelsff, which meshinto each other, and which can be turned by means of suitable mechanism. I v I The operation is'as follows: The bar/tobe bent, which is previously cut to the required length, is placed between the rollers B and 0, and then the wheels f are turned so as to bring-the rollers D D at such a distance from the point at which the bar is held, that the curve described by the banwhenit is bent to rest upon the rollers D, will be part of the circle into which it is desired to bend the bar. The axles B and C revolving in opposite directions, carry the bar forward, and every portion of the same is thereby bent into therequired curve, so that thedesired ring is obtained.

It will be seen that by moving the slides further up or down, the diameter of the ring will be diminished or enlarged, and that when the rollers D are bronght close to the-roller B, the inner diameter of the ring will he equal to the outer-diameter of the roller 18..

The projectingends of the rollers B end C, or of either of them, may he made removable, so that they can be replaced-by such which have 'grooves to receive hereof suiteble cross-section. The device may receive its motion from suitable mechanism.

Havingthu described my invention, what I claim as new,-'a.nd desire to secure by Letters Potent, is-

1. The combination of the rerolving axles B 0, adjustable friction-rollers D D, 'upon the concentric bearing-plates ii, concentric guides c, connecting-rode e, and geor-wheels ff, as herein described for the purpose specified. v

2. The device herein shown and described of. operating the friction-rollers D D, consisting of the guides c 1-, slides 12 d, rods e e, eind wheels'ff, ellmede and operating substentielly as herein shown and described.

3. Adjusting "the friction-rollers D D around the larger-rolleriG; and with relation to the upper adjustable roller B, by means of the curved plates d, operated in concentric guides around the roller 0, by the connecting-rod e and gear-wheelsff, as herein described; v

' -WILLIAM H. PEGKHAM.- Witnesses:

"WM. F. McNAnAm, ALEX. F. Rename.