US108139A - Improvement in apparatus for finishing terrets - Google Patents

Description

diluted gratta CONSTANTINE HINGHER., OF NEW BRUNSWICK, NEW JERSEY.

Letters Patent No. 108,139, dated October 11, 1870.

IMPROVEMENT IN APPARATUS FOR FlNlSHING TERRETS.

The Schedule referred to in these Letters Patent and making part of the same exact description thereof, which will enable others,`

skilled in the art to make and use the same, reference heilig had to the accompanying drawing forming part of this specification.

This inrention relates to improvements in'apparatus for tinishing terrets, rings, and other similar articles used in making harness, which have been covered with vulcanized India rubber, and which cannot be turned by a lathe having a continuous rotary motion, owing to projections on thc rings.

The invention consists in a stock receiving the ring of thc terret on a boss, so that one can be held while the other is turned, said stock carryinga dressing-tool and a feed-screw, also an operating lever for holding and turning it, all as hereinafter described. l

Figure 1 is view of my improved-tool partly in section and partly in elevation; it also-shows a section of a terret in the position for being dressed;

Figure 2 is a bottom view of' lig. l; and- Figure 3 vis au elevation, showing a slight modilication in the construction ot' the same.

Similar letters of reference indicate corresponding parts.

Owing to the difficulty 0i' turning and dressing these articles in a lathe having continuous motion, on account of the projecting Shanks, the operation has hitherto been done by ahand-polishingor finishing-tool, which is slow and tedious, and which it is the object of this invention to obviate.

l A is a cylindiica-l stock, of wood, metal, or other suitable substances, o f suitable length, and somewhat larger than the ring ot the tcrret to be dressed. It is provided at one end with a boss, B, of the proper size to enter the ring snugly, and receive it against a shoulder, c, and below this boss is a feed-screw, D, which may either project from it and have a screwthread for the reception of a feeding-nut, D., or it may be tapped, and have the feed-screw provided with a head or collar, E, screw into it, as shown in fig. 3, in which case the stock will serve as thc nut.

The cylinder is provided, at one side, ywith an oblique sl'ot or groove, for holding a tool, F, for working upon thc upper side of thc terret, which tool is conned in the slot, either by the screw G in the stud H, projecting radially from the cylinder, or it may be by screws I passing through a rib, K, projecting from the side of the cylinder, between which and another rib, the slot for the terrct is formed.

L is awaslier introduced between the'nut D and' the terret.

M is a lever, passsing through a hole iu the stock -nearthc top for holding and turning it.

The operation is as follows:

The nut D' or the head F of the screw, represented in tig. 3, as the case may be, is screwed up in a vice or any other suitable means of holding.,r it. The rimN of the terret is placed on the -boss 'B of the stock, which is thenV screwed into the nut D', or on the screw, until the ring is forced up nearly to the shoul der c, either by the washer E, or the collari of the nut, when it is pressed against the edge of the tool F, which is shaped to correspond with the finished form or" one side of the ring. In adjusting the'terret, care is taken that the shank O of the terret shall be as close against the heel of the cutter as may be; then, the stock being held against turning by the lever, the terret is turned by the hand, or other means, applied to the shank O, until itis brought around against the edge of the cutter; this causes a scraping or turning ofi' a thin cut; theterret is then turned back to the original position, and the tool is fed for a new cnt by moving the lever M in the direction to screw the stock down into the nut D', or upon the screw, after which another cutis taken, as before, and so on until completed. The tei-ret is then taken oi', turned the other side up, and the operation proceeded with as before..

It is obvious that the stock and feeding-screw may be variously arranged,and that instead of holding the nut or feeding-screw in the vise or -other holder, the same purpose may be accomplished by holding the stock.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- 'lhe grooved, bossed, and shouldered stoel; A B C, feed-screw D, lint and collar D E, and tool F, combined and applied as and for the purpose described.

' GONSTANTINE HINGHER.

Witnesses GEO. W.,MABEE, T. B. Mosman.

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