US195291A - Improvement in lathes for turning bobbins - Google Patents

Description

W. 1%..I.ANII'JFEAR.V LATHES Fon TURNING BoBBINs.

In v enmf':

Patented Se Mlnes'ses.-

rotates when in place in the shuttle.

UNITED STATEs PATENT CEEICE WILLIAM R. LANDFEAR, OF\BROOKLYN, NE W YORK, ASSIGNOR TO TIMOTHY MERRIOK, OF HOLYOKE, MASSACHUSETTS.

I IMPROVEMENT IN LATHES FOR TURNING BOBBINS.

Speciication forming part of Letters Patent No. l95,29l, dated September 18, 1877 application filed July 17, 1877.

To all whom it may concern:

Be it known that I, WILLIAM R. LANDFEAE, of Brooklyn, in the county of Kings and State of New York, have invented certain Improvements in Machines for Making Bobbins; and that the following is a full, clear, and exact description thereof, suiicient to enable those skilled in the art to which my invention appertains to make and use the same.

My invention is particularly adapted to machines for making bobbins for sewing-machine shuttles.

In the usual process employed in making bobbins for sewing-machine shuttles it is necessary to use two machines, one of which forms the barrel of the bobbin and the other forms the gildgeons upon which the bobbin The work, consisting of a rod or bar of wood, either round or square, is carried by a sleeve and spindle, which rotate it and feed it to the cutters. One of the lcutters forms the barrel of the bobbin. Another cutter reduces the diameter of the wood between the bobbin thus formed and the portion from which the next bobbin is to be formed, and said reduced diameter is cut through transversely. The bobbin is then removed and placed in another machine, in which the gudgeons are formed by cutters moved up toward the ends of the bobbin from opposite directions. This involves considerable trouble and loss of time, as it is necessary, after .the barrels have been formed f by one machine, to place the bobbinsin another machine to be ni'shed by forming the gudgeons. Moreover, in the old process the gudgeons are sometimes eccentric, or one gudgeon is not in a right line with the other, so that the bobbins are caused to bind, or to fail to revolve accurately, when in place in the shuttles.

To obviate these and other difculties experienced in the former process is the object of my invention; and to this end my invention consists in a novel construction, arrangement, and operation of devices for guiding and rotating the work, and of a device for forming the gudgeons on the bobbins, whereby the barrel is turned, the gudgeons formed, and the bobbin completely finished by one and the same machine, and whereby the gudgeons are formed uniformly on all the bobbins, so as to insure their accurate operation when in place in the shuttles.

In carrying out my invention the cutter which forms the barrel of the bobbin and the sleeve and spindle which carry the work and t'eed it to the cutter may be of the usual or any other suitable description. So, also, may be the stationary and movable heads and their appurtenances.

The work, as it is rotated and fed to the cutters, passes through a stationary guide, which, if desired, may be provided with a cutter for giving a cylindrical form to the work before reaching the main cutters; or said guide may be simply a rest for the work, if the rod or bar of wood has been previously made of cylindrical form and of the required diameter. The work then passes through another stationary guide, in which is a circular opening of a diameter corresponding with that ofthe flanged portions or heads of the bobbin when finished. The work then comes in contact with the cutter, which forms the barrel. Said cutter may be similar in its construction and operation to those used in the ordinary process, and is automatically thrown into and out of contact with the work by cams or other suitable means.

As soon as the cutter has formed the barrel of the bobbin it is automatically withdrawn therefrom. The outer or free end of the bobbin is then engaged by a chuck, which is carried by a spindle revolving with exactly the same velocity as the work. This spindle is provided with means for imparting to it a longitudinally-reciprocating motion without interfering with its rotary motion, which means may consist of a cam-movement so arranged, by belts or gearing, with relation to the driving mechanism as to cause the spindle to advance toward and recede from the end of the bobbin at the exact time required, as hereinafter described. When the chuck is engaged with the end ofthe bobbin the gudgeon-forming cutter is automatically thrown forward and into engagement with the work between the inner end of the bobbin just formed and the portion of the wood from which the next bobbinisto be made. The cutting-edge of this cutter is shaped like the letter V or two sides of' a triangle, and the result of its operation on the work is the forming, at one and the same time, of the inner gudgeon ofthe bobbin just made and the first gud geon of the bobbin to be next made, which result is accomplished by cutting a V-shaped groove and continuing the same until thel wood is entirely cut through and said two gudgeons are separated, whereupon the cutter is automatically withdrawn and thrown back, the chuck recedes from the outer end of the bobbin, and the bobbin, completely finished, drops of its own weight, and the abovedescribed operation is repeated. During the operation of forming the gudgeons the outer end of the bobbin is supported and rotated by the chuck and the inner end is supported by the station ary guide. As soon as the gudgeons are formed and the chuck recedes the hobbin is allowed to drop from the stationary guide.

If desired, on the first commencement of the operation of the machine the gudgeonforming cutter may be brought to bear upon the end of the work, so as to form the lirst gudgeon of the first bobbin.

The accompanying drawings illustrate a mode of carrying out my invention.

Figure 1 is a front view of a machine embodying my improvements; and Fig. 2 is a transverse vertical section of the same, taken in the line a: .fr of Fig. 1.

A is the bed, B the stationary head, and C the movable head, of a machine for making bobbins. D is a stationary head or standard, in the upper portion of which is a guide, E, which may be provided with a cutter for giving a cylindrical form to the wood, or may be merely a rest for the work. F is a spindle, carrying a sleeve holding the work, and rotated by a belt passing around a pulley, f. This spindle is also provided with means for imparting to it a longitudinal motion, in order to feed the work to the cutters.

All of the abovementioned parts maybe similar to those used in ordinary machines for making bobbins.

G is a stationary guide, attached in any suitable manner to the stationary head or standard D. This guide consists of a plate having in its upper portion a circular opening corresponding with the diameter of the work and of the anged portion or head of the bobbin after the barrel has been turned.

H is a spindle, having its bearings in the movable head C, and provided with a pulley, h, for the reception of a belt, by which it may be rotated at exactly the same speed as the spindle F. The spindle H has a longitudinally-reciprocating motion imparted to it by means of mechanism of any well-known or suitable description.

The head C need not necessarily be movable; but it may be desirable to have it so arranged,in order to provide for the making of bobbins of different lengths, in4 nwhich` event it may be similar to the movable head ofi an ordinary lathe. The head C may be permanently stationary, and the spindle H have a longitudinal motion therein or the head may have a reciprocating motion longitudinally of the spindle, and carry the sp'iii'dll with it.

As here represented, the distance between the bearings ot' the spindle in the head C is sufficient to allow the pulley h, to have ample play for the necessary longitudinally-reciprocating motion of the spindle H, and this motion may be imparted by means of a cammovement or other suitable 'mechanism'. (Not shown herein.)

The spindle H carries on its inner end a chuck, J, for engagement with the outer end of the bobbin, as hereinafter described:

The gudgeon-forming cutter' K' has a V- shaped cuttin g-ed ge, and'is carried by a stock, L, attached by a pivot, M, to the stationary head or standard D, so as to allow' it to oscillatein a direction transverse tothe length of i the bobbin and of the work. The cutter-stock has an oscillating motion imparted to it by means of a cam orother suitable'device, (notv shown herein,) so as to causetle cutting-edge of the cutter to be automatically thrown intoand withdrawn from contact with the workiatf stated times, as hereinafter described.

The operation is as follows: The work held by the sleeve carried by the spindle Fl is, dur*- ing its rotation, moved longitudinally and'fed to the cutters by means of` al screwshaft or' any other suitable mechanism. Als the endof the rod or bar of wood emerges from the guide G the barrel-forming cutter' iis'4 thrown into contact with the work, andA formsthe barrel' of the bobbin, after which itl-is automatically withdrawn in the usual manner.v The spiudlel H then advances toward the bobbin, andthe` chuck J engages with the outer endA of said bobbin, and, as said spindleHand; chucLtJ revolve at the same speedi as the spindle F, the revolution continues as before. The gudg# con-forming cutter is now thrown intoY engagement with the portion of* the work lying;

between the guide G and the rest E, andi the;

V-shaped cutting-edge operates onthe wood so as to form a V-shaped groove; and the2op eration is continued untill the wood; is entirely cut through and the second-ori inner gudgeon of one bobbin and the 'rstv or' outer g'udgeon ot the next bobbin are formed and the n ished bobbin separated from the remaining portion of the wood. They gyudgeoni-forming! cutter is then withdrawn andiw-ithh'eld, sofas to allow the work to be fed along, the chuckJl recedes from the finished bobbin, so as to allow it to drop from the' guide G, and* the former operation is repeated Having thus described? my invention, what I claim as new, and desire' tosecur'e by Letters Patent, is-

1. In a machine for making` bobbins,a-sta tionary guide for supporting theinnerendot 3. In combination with a bobbin-making machine in which the barrel is turned, the gudgeous formed, and the bobbin completely finished in one and the same machine, a cutter for simultaneously forming the second gudgeon of one bobbin and the rst gudgeon of the next bobbin, substantially as herein described.

WILLIAM R. LAN DFEAR.

Witnesses:

E. B.. BROWN, ADOLPH KOEHLER.

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