US90838A - Improvement in loom-picker shoe - Google Patents

Description

N. PETERS. PNOTO-LIYHDGRAPMER. WASHINGTUN. D

great extent of throw to the shuttle is required, protanta sans @time @Wina EDMUND J. HALL, CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO ORVILLE PECK- HAM,`TRUSTEE, AND SAID TRUSTEE ASSIGNSTO EDMUND J. HALL AND EDWIN y A. HALL.

Letters Patent No. 90,838, dated June l, 1869.

ILEPROVEMENT IN LOQM-PICKER SHOE.

The Schedule referred te in these Letters Patent and making part ofthe same.

To all. whom it 'may conce/rn.:

Be it known that I, EDMUND J HALL, of Oambridge, in the county of Middlesex, and State of Massachusetts, have invented a new and useful Improvement in Shoes for Looms; and I do hereby declare that the following specification, taken in connection with the drawings making a part of the same, is a full, clear, and exact description thereof.

The drawing represents, in perspective, so much of a cassimere-weaving loom as is necessary to show the improvement.

For the purpose of giving motion to the pickersta", which impels the shuttle, it has long been` customary, in looms for weaving cassimeres and broadc'loths, to employ a revolving wiper or arm, keyed to a revolving shaft, the end of which wiper, furnished with a iiction (usually called a truck) roller, causes, at eachrevolution, a sudden rocking motion to be given to a' shaft, which motion, so obtained, being communicated `tofthe picker-staff, causes the latter to throw the shuttle, carryig the filling, with great force, through the shed formed by thewarp-thre/ads.

The device attached to the rocking-shaft, and which is to receive, in the iirst instance, the blow from the revolving wiper, is called .the shoe, and is simply a short arm, ofcast-iron, projecting from the shaft, and adjusted thereon, the cross-section of which is in nearly the form of the letter A.

The great shock which this shoe is required to sustain is necessarily very destructive to it; but more than this, the harshness with which the [notion is obtained affects injuriously the whole mechanism of the loom, besides being the cause of frequently breaking the filling-thread given off bythe shuttle.

My invention, while it proposes to preserve this necessary means o'f communicating motion, where a poses to `reduce its destructive tendency by mollifying its action, make its face receiving the blow of the truck-roller capable of self-lubrication, which has hitlierto not been donc, and enable the shoe itself to continue in service for a very long period of time, instead of being knocked up after a few hours or days use, as not nnfrequently happens.

In the drawings, A is the side frame of a loom, B is the revolving wiper, C the rocking-shoe shaft operating the picker-stad` D, through the arm E and linkrod F, all as usually found in looms of this class.

G is thev shoe, of the general saddle-tree shape heretofore used, and attached to a box-shaped sleeve, a,

which enables it to be set at the proper point on the shoe-shaft, where it is-held by a clamp-screw.

Thefirst improvement consists in mounting in bearings, at the angle formed by two faces of the Shoe, a friction-roller, c, such roller thereby constituting the apex of the shoe.- f l Underneath this roller, a semi-cylindrical cavity is formed in the casting, corresponding with the surface of the roller, but deeper than required for the rollexs accommodation, which trough, so formed, is to be used as a reservoir for oil or other lubricant.

It is manifest that the effect of this friction-roller. c will be to diminish the harshness of vaction which attends the working -of the old form of shoe, by the revolvingwiper, while upon each blow of the wiper the truck-roller b, and face ofthe shoe, will receive fresh lubrication from the oil which is taken up from the reservoir upon the revolving surface of the fricn tion-roller c, and be, therefore, self-lubricating.

The action of the wiper B is to tilt the shoe-shaft C. Consequently', the friction-roller c should be placed suiiciently far back from the front edge of the shoe to make allowance ,for the angular position in which the shoe will be when VYthe truck-roller is in contact with its apex, and enable the truck-roller b to find the friction-roller c at the end of the curvilinear path, which such truck-roller necessarily wears upon the surface of the shoe, by reason of the latter tilting at right angles with the line of movement of the former.

A shoe made as above described possesses, in addition to the advantages before mentioned, the capacity to endure for a long time.

When the roller eis too much worn, it can readily be replaced, and this enables the shoe itself to be reversed in position and used, if one of its faces has become worn ont, which, in the ordinary shoe, is not practicable, for the reason that the unworn face cannot be made ofservice if the apex is too much worn away, Y

Witnesses ORVILLE PECKHAM, CHAs. W. GREENE.

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