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Lette/rs Patent No. 92,612, dated July 13, 1869.
IMPROVEMENT IN SH'U'TTLIEI-BIDX-OPERATINGl LEVER FOR-LOOMS.
The Schedule referred to in these Letters Patent and ymaking part of the same.
VTo, all whom it ma/y concern Be it known that I, BARTON II. -J nuns, of Bridesburg, in the county of Philadelphia, and State vof v Pennsylvania, have invented a new and useful Improvetnent in Box-Levers for Looms and I do hereby declare that the following is a full, clear, and exact `description thereof, reference being had to the accompanying drawings, making part of this specication, in which-' Figure 1 is an elevation of one side of a loom-frame, showing my improved box-lever'applied to a shuttlebox rod.
Figure 2 is a top view of fig. 1.
Figure 3 is a similar view of the same parts shown in fig. 1, representing the position which the loaded arm of the box-lever would assume should the upward movement of the box-rod be arrested.
Similar letters of reference indicate corresponding` parts in the several iigures.
`lever of a power-loom, for weaving fancy fabrics, by
providing such lever with a jointed extension, which is adapted for carrying the weight used to counterbalance the weight of the shuttle-boxes and their rod, and which is `also adapted for allowing the box-lever to move independently of itsA extension, should 'the shuttle-boxes be arrested in their upward movement, as will be hereinafter explained. i
On the 12th day of May, 1863, Letters Patent of the United States were granted to BARTON H. JENKS and John Shinn, and assigned to myself, for an improvement on box-levers for power-looms, which levers were provided with jointed extensions,iwhich would yield and prevent breakage of the shuttle boxes, or other parts of the box-motion, in case Jthe picker or shuttles should be caught in the shelves of the boxes in the act of rising.
In the practical operation of levers thus constructed, it is found Vthat the weight which must be employed to counterbalance the weight ofthe shuttle-boxes and their rod, will produce a trembling and irregular motion, owing in part to the speed which the lever receives, and the inertia of the counter-balancing weight.
I d0 not, therefore, claim under thispetition the broad idea of a yielding extension to a box-lever.
To enable others skilled in the art to understand my invention, I will describe its construction and operation.
In the accompanying drawings- D represents a box-lever, which is pivot-ed to one side ot' the frame A, at a, so as to vibrate freely ina vertical plane.
Dl represents an extension of the lever D, which is pivoted, at b, to that end of this lever nearest the boxrod C, by means of a rule-joint, s, and which 4extends forward in the plane of lever D, beneath a shoulder, h, on the said rod, so as to afford a support therefor,
The extension Dl is held in its position in line with the box-lever, as shown in fig. 1, by means of a weight, B, which is' applied on the long arm, D2, of this extension, which arm may be made of any desired length, and should be carried vback of the fulcruma, so that the weight B will counter-balance the weight of the shuttle-boxes, the shuttles, and the box-rod C.
This arm D2 is a part of the extension D1, and is curved outward, and extended backward, as shown in fio. 2.
cThe weight B should not only counter-balance the yload on the extension D1, but it should besuflicient to keep this extension in line with the box-lever under all ordinary circumstances.
The box-rod Gis arranged to move up and down vertically in the guides g g', and is supported upon the extension D1 by the adjustable shoulder h, in the usual well-known manner.
Upon its upper end this rod carries the shuttleboxes, not shown in the drawings, which may be controlled in their vertical movements by cams and a pattern chain or studded cylinder, arranged' to operate upon therear arm of lever D, in the usual well-known manner, as in-any suitable manner.
It frequently happens, during the opera-tion of the shuttle-boxes and theirA accessories, that the pickers or the shuttles will lodge yor be caught in such manner as to resist the upward `movement of the boxes, and unless provision is made which will allow the boxlever to work freely under these circumstances, the boxes, or box-motion, or both, will be injured.
In the Letters Patent numbered 38,534, above referred to, the box-lever is provided with an elastic extension, upon which the box-rod rests, which extension will yield should the upward thrust of the boxrod be resisted, as above stated, and prevent breakage or derangement of the parts.' f
`It will be seen that I still employ a jointed yielding extension of the box-lever, but instead of using a spring to hold up or stiffen the jointlbf this extension, and applying a cunterbalancing weight on that end of the box-lever which is acted upon the cams, I employ the weight B to stien the rule-joint 'at b s, and
apply this weight upon an arm, DE, so that it will also serve to c-oiuiterbalance the load uponsaid extension D1.
When the box-lever is thus constructed, or provided with a counterbalancing weight and yielding extension, the objections attending the elastic extension, above alluded to, will be obviated, and should the shuttle- -boxes be arrested by the pickers or the shuttles during the operation of the loom, the extension Dl will yield, as shown in iig. 3, and prevent injury or derangemcnt tothe parts. f
Having described my invention,
What I claim as new, and desire to secure by Letters Patent, is- A 4The box-lever D, or its equivalent, provided 'with the yielding extension D, acted upon by the counterbalancing weightB, applied upon the arms D'Vot' said extension,'substantially as and for the purposes dcscribed.
BARTON H. JENKS.
Witnesses GEO. A. WAGNER., 'H. .S. MILLER.