US410215A - Island - Google Patents

Description

G. W. STAFFORD 8v s. D. BARRETT.

JAGQUARD ATTAGHMENT FOR LOOMS.

(No Model.)

No. 410,215. Patented Sept. 3, 1889 w i/bvmmo v 7 amma 0% mm W UNITED STATES PATENT OFFICE.

GEORGE W. STAFFORD AND SAMUEL D. BARRETT, OF PROVIDENCE, RHODE ISLAND, ASSIGNORS TO THE GEORGE W. STAFFORD MANUFACTURING COMPANY, OF SAME PLACE.

JACQUARD ATTACHMENT FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 410,215, dated September 3, 1889.

I Application filed February 14, 1889. Serial No. 299,825. (No model.)

To all whom it may concern:

Be it known that we, GEORGE W. STAFFORD and SAMUEL D. BARRETT, of Providence, in the county of Providence and State of Rhode 5 Island, have invented certain new and useful Improvements in Jacquard Attachments for Looms; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompa- I nying drawings, and to the letters of reference marked thereon, which form-a part of this specification.

This invention relates to Jacquard attachments for close-shed looms. These machines r as usually constructed, as shown in United States Patent No. 236,37 5, January 4, 1881, have moved the top plate or griff which raises the vertical harness-hooks that are selected by the pattern-cylinder to form the figure on the fabric and the bottom plate upon'which the hooks rest when down in a level position parallel with each other at all times. This arrangement has several objections, one of.

which is the .bad effect on the warp-threads 2 5 because of the necessity of raising the greater part of them much higher than they need to be in order to raise those attached to the back row of hooks high enough to form a proper shed for the passage ;of the shuttle. Another objection is the vibration of the harness when the hooks come down in contact with the bottom plate, as it is obvious that when the griif descends all the hooks held upon it must come in contact with the bottom plate, which is rising to receive them at the same time. If the two plates are parallel to each other, the meeting of this body of hooks and the lower plate causes a severe shock or blow, which has the effect of break- 4o ing the harness-cords, especially upon heavy liftswhere wide goods are woven having a large number of threads in the warp. This vibration is the main objection to running Jacquard looms at as high a rate of speed as looms using other known methods of operating the warp-threads, and tilting the griff in its upward and downward movements is one of the modes that has been adopted in some cases to obviate these difficulties.

In the drawings, Figure 1 shows an end elethereof, with a part of the griif broken away. Fig. 3 shows a detached end view of the pattern-cylinder and a part of its end support.

A is one of two duplicate frames held together by suitable cross-beams and between which the bottom plate or rest d, the upper plate or grid 0, with its cam-guide f and roll I), together with the vertical hooks a: and horizontal needles, are operated by means of the outside mechanism shown in Fig. 1. r

"The operating devices being the same for both ends of the machine, it is deemed sufficient to explain only one. A vertical guiderod j is held on the inside of the frame A in boxes 2?, attached to the frame, in which boxes it is free to slide up and down. This rod j has a bearing made on its upper end to receive that supports the griff c, which is held by two ears projecting from the griff that rest on flanges made on the table 3. This table 5 has two cars projecting down-one on each side of the rod jto which the cam-guide f is fastened by means-of bolts e c, Fig. 2, which pass through holes in the ears and slots in the cam-guide for the purpose ofallowing of an adjustment of the guides to give more or less inclination to the griif in rising, as may be necessary. A roll I), fitted to work freely in the slot in the cam-guide f, is held on a stud fast in the box 23, that holds the rod 7' to the frame A. The lower plate or rest (1 is held on the table 8, which has a box It attached to it fitted to slide on rod j. At the upper end of the box 72, a stud is placed to receive the connecting-bar a, by means of which the table receives its motion from the workinglever 'i, to which the other end of the bar is pivoted. The uppertables and griff receive their motion from the same lever 'Lthrough the noddle beam or lever Z, which is connected to the lever i by a short bar at, which is pivoted to the end of the noddle-beam Z and tothe lever '6 a proper distance inside of the pivot of the bar a. The noddle-beam Z is hung on a pivot in a step fastened to the frame that supports the machine. A bar or rod 17 conone of the trunnions 0 of the upper table 8,

the attachment, taken about 011 the mid-line nects the other end of the noddle-beam l to the trunnion o of the uppertables. The pattern-cylinder '1' is held in bearings in the upper end of the swinging frame 0, which is attached by a pivot at its lower end to. the frame A. The frame 1) receives a swinging motion to and from the frame A through a jointed knee-lever g, which is held on a stud fast to a projection on the frame A. This lever is composed of two arms if g hung by one end to the same stud 11 which-arms are prevented by a projection g on one of them from approaching each other nearer than represented, and are held yieldingly in that po-, sition by a close spiral spring 17' The upper end of the knee-lever 3 is connected by a bar y to the frame 2;, and the other end of the knee-lever y is connected to the trunnion of the upper table 5 by a bar 0. The stud in the lower end of the bar 0 is held in a slot in the lower end of the knee-lever y, so as to be capable of being adjusted to increase or lessen the swing of the frame 1:. The object of having this joint in the knee-lever y is to prevent the pattern-cylinder from doing or receiving any injury when from any cause it fails to make a full quarter-turn in its outward movement, and thus presents a corner to the needle-plate in the inward movement, the spring 0", connecting the two parts of the lever 11 allowing the continuation of the downward movement of the lower part while the top part remains stationary.

It is not thought necessary to describe the mode of turning the pattern-cylinder, as our invention does not refer to that point, and it may be done in any of the ordinary ways used, nor to describe the construction of the griff, which is made with the usual horizontal bars. WVhen desired, the bottom plate (1 may have a similar motion to that of the griff c, as described, by applying a similar cam and guide to it, (the movement of the plate (1 would be in the opposite direction,) as in some cases it is desirable to open the shed with a corresponding angle at the bottom. The outer end of the working-lever 2', which is shown as broken off, is connected by a rod to a crank fast on the crank-shaft of the loom in the usual manner.

In operation, the working-lever i receives a vertical motion by a rod connecting it to a crank on the crank-shaft of the loom below, and when the crank raises the outer end the inner end will be depressed and drawn down the lower plate 5 by means of the bar a, as shown by the dotted lines in Fig. 1, and the noddle-beam Z will be depressed at that end connected by bar 01. to the lever 'L', causing the other end to rise, and by means of the bar p raise the upper table 5 and griff c to the po sition shown by the dotted lines in Fig. 2, and as the table 3 rises the guide-cam f attached to it will be moved by the stationary roll 35, so as to tilt the grift', as shown in Fig. 2. As this guideoam f can be constructed in any desired shape, and by means of the bolts that hold it in place can be adjusted in position, it will be seen that almost any motion in character or degree can be given to the griff.

As looms are constructed both right and left handed-that is, with driving-pulleys at the right or left hand end, and the crank that operates the lever i is made fast on the crankshaft at the opposite end of the loom to the driving-pulleys, it becomes necessary to use the Jacquard attachment with either end toward the front of the loom and still raise the back row of harnesses the highest. To accomplish this it is only necessary to reverse the guide cam-plates, or to change them from end to end of the Jacquard machine, and the row of hooks that operate the harnesses toward the back of the loom will rise the highest and operate the harnesses properly in that respect, and the necessity for reversing theorder of punching the pattern-cards, which would otherwise be necessary, will be avoided.

Having thus described our improvements, what we claim as our invention is 1. The guide-rods j, sliding in bearings on the frame A, and having pivotal bearings at their upper ends, the griff c, the table 3, the cam f, and means for adjustably securing it to the said table, in combination with frame A and guide-roll 17, secured thereto, and means for moving said rods j up and down in their bearings, substantially as specified...

2. In combination with the swinging frame 11 and end frame A, having a stud secured therein, a knee-lever made in two parts, both of which are pivoted on said stud and are formed to engage one with the other to give a positive movement to the swinging frame outwardly, and the spring 12, attached to the two parts of the said lever, whereby the lower part may make its downward movement if the frame 1; should be impeded in its inward movement, a link 3 a bar 0, and means to actuate said bar, substantially as and for the purpose set forth.

3. The combination, withthe griff 0, plate 3, rod j, rod 19, and 'noddle-beam l, of lever i, a

connection '12 pivoted to one end of the nod dle-beaml and to the lever 't' at a point between its fulcrum and its inner end for the movement of said griff c, and the plate 3, plate or rest (1, box h, and the connection a, pivoted to the inner end i and to the box It for the movement of the plate or rest (1, substantially as herein set forth.

GEO. WV. STAFFORD. S. D. BARRETT. Witnesses:

CHARLES H. POLAND, BENJ. ARNOLD.

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