US541879A - Jacquard mechanism for looms - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

G. PAVIA. JAGQUARD MEGHANISM FOR LOOMS.

Patented July 2 llllll IHII (No Model.) 3 Sheets-Sheet 2.

G. PAVIA. JAGQUARD MECHANISM FOR LOOMS.

Patented July 2, 1895.

(No Mo'del.)

3 Sheets-Sheet 3. G. PAVIA. JAGQUARD MEGHANISM FOR LOOMS.

Patented July 2, 1895.

UNITED STATES PATENT' OFFICE.

GIUSEPPE PAVIA, OF PATERSON, NEW JERSEY.

JACQUARD MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 541,879, dated July 2, 1895. Application filed July 23, 1894, Serial No. 518,355. (No model.)

To all whom/ it may concern.-

Be it known that I, GIUsEPPE PAVIA, a citizen of the Kingdom of Italy, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Jacquard Mechanism for Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The improvements claimed by me in theJacquard mechanism relate to two sliding bearings furnished for the pattern cylinder, which are by me so constructed as to give the cylinder during thelatter part of its forward reciprocation a perfect horizontal sliding movement parallel with the needles, the movement of the cylinder in many constructions heretofore having followed that of the cradle, viz: a circular movement, with the pivots of the cradle as a center thus, geometrically speaking, rendering the position of the needles that of tangents to such circles, often resulting in the missing of the holes in the pattern cards by the needles and their consequent bending. The pattern cards were furthermore subject to being punctured and otherwise damaged by the abrupt slamming of the'cylinder against the needles, all of which tended to wear out the pattern cards very soon, or necessitated their being made of such heavy and thick ma.

terial that they could not easily be punctured. To obviate these evils I have given the cylinder the two sliding bearings with auxiliary mechanical elements, dividing the forward reciprocation of the cradle into two separate and different movements, the first performed by the swinging cradle'up to within an eighth of an inch or so from the needles, and the second performed by the horizontally sliding bearings carrying the cylinder with them thus giving an easy, elastic impression on the needles, admitting each needle horizontally with mathematical precision into its respective hole, thus preventing the bending of the needles and ultimately reducing the cost of furthermore will throw the shed level.

and forth at the moment when the knives pass the hooks. This movement has the bonefit of preventing the bending of the books which very frequently occurs and consequently saves the time spent by the operator in repairing, and in the end, wear on the hooks and knives, giving longer life to the jacquard. It also makes it possible to use the jacquard in rooms with lower ceilings than the jacquard of up to date will permit, as no emergencies will arise where new books will have to be inserted. Lastlyl have furnished a bar-frame worked by a lever attachment for the purpose of throwing all hooks elevated in their standing position, enabling the weaver to adjust any threads out of order and wl iich he principle on which this mechanism works as relating to the location of the needles, and their combination with their respective hooks, the movement of the upper and lower griffs toward and from each other and their rela tion to the upper stationary grate D is the same as covered and described in other patents andI shall therefore confine myself to describing my improvements and in so doing will refer to the accompanying drawings where like letters of reference indicate corresponding parts in the different views.

Figure 1 represents a side view of the Jacquard mechanism with one needle and its attendant hook shown for the sake of illustrating my improvement relating to wear on the knives and hooks. Fig. 2 is an end view of Fig. 1, looking at it from the end where the cradle is attached. Fig. 3 is a side view of my improved cradle, showing all the parts necessary to give it the new movement'herein described. Fig. l is a side view of the top of cradle showing the location of the sliding 5 bearings. Fig. 5 is an end view of the parts Fig. 8 is atop View of my improved IOO . bar-frame fixed on top of the upper stationary grate. Fig. 9 is a side View of the parts shown in Fig. 8. Fig. 10 is a top view of my improved lower stationary grate. Fig. ll is a side view of the parts shown in Fig. 10.

In Fig. 3, will be seen the cradle B, pivoted on frame -A, which carries the cylinder G to and from the needles. The movement of cradle B is occasioned by the roller N, attached to the right-angled arm M connected with the upright motion bar Z and consequently following its motion, moving in cam guide 0 on the cradle. After completing the period of this movement toward the needles; I maintain the cradle in a fixed position allowing the cylinder during this time to come in contact with the needles by a straight horizontal movement. The mechanical elements necessary to attain such objects I shall now proceed to describe.

The ends of the cylinder shaft B rest in a set of sliding bearings B, one of which bearings is shown in the detail view in Figs. 3 and 4 and in one side of the cradle. An opening is to that end out out in the cradle 13 of such a size and shape that the bearing fits snugly in it and allows it to travel back and forth regulated by the movements of the other component elements of this combination.

Bearing B and plate B having slots registering with another slot cut out in cradle-arm to permit the cylinder to be taken out is furnished as a consequence with an arm or bearing supporting the end of the cylinder shaft B when it passes over the slot in the cradle arm. This arm B is pivoted on plate 13 and has a pin B fitting into acorresponding hole in plate 13 said plate 13 thus covering and protecting the opening containing bearing 15. This opening is on the inside of the cradle covered by hearing B itself lapping over the edges as indicated by the dotted lines in Fig. 4. The plate B which is shown in Figs. 6 and 7 separately in a front and top-view is fastened to the sliding bearing B by means of screws passing through holes B screwed into screw-cut holes B in bearing. In the upper edge of the rear part of bearing B overlapping the opening there is a square notch B cut out for the reception of a tongue B Said tongue being acted upon by the elevating rod 13 is given an up and down movement and rests in-a pocket 13 cast on the inside of cradle arm above the bearing B and passes through a slot B cut out for such purposein cradle arm and tongue B protrudes far enough on the outside to enable the upper forked end of elevating rod B to catch it and liftit in and out of the notch B in bearing B as the occasion requires it.

Pivoted on a lug 13, cast on cradle is a right-angled lever J which at the end of its short and horizontal arm is furnished with a roller K which is acted upon by a projection or lugL cast on the arm M formerly alluded to. On the outside of cradle B, as seen in Figs.

1 and 3, is an elevating rod B resting with its lower end on an arch-shaped projection B on a lever 13 which lever at one end is pivoted on a lug 13, cast on cradle B, and at the other end suitably fixed to upright motion bar Z. The upper end of said elevating rod 13 is fork-shaped and in the fork rests the tongue B The rod B having the two slots B cut out in it and being secured to the side of cradle B by. means of'the two pins 13 so that it moves up and down the side of it, folfollowing: WVhen the arm M carrying roller N moving in guide 0 forces the cradlein toward the needles, lever B which as well as arm M is. fixed on upright motion bar Z will be in its lowest position and tongue B will consequently be resting in the notch B in bearing B. On the return movement motion bar Z will lift lever B and consequently rod B thus throwing tongue B out of notch B and the right angled lever J Will at that moment by the action of lug L on roller K force bearing B in toward the needles, and both bearings carrying cylinder G will thus 'perform the final movement and bring the cylinder carrying the pattern cards into contact with the needles, the action of spring B here comingiuto play by breaking the force of the movement and by sending bearings back again to receive the tongues ready to hold them in position until the next inward movement of the cradle, which was the desired object.

The movement whereby the bending of the hooks is prevented occasioned by the knives striking them in their downward movement and whereby the-mutualwear on them is di m inished by reason of their being enabled to pass and repass each other without coming into contact is illustrated in Figs. 10 and ]1 showing the lower stationary grate and Fig. 11 a side view of same; The main features in this construction are, first, tworollers held in bearings cast on the grate which during the up and down movement of upright motionbars X are pushed away bylugs cast on said motion bars acting on the rollers, and, secondly, an auxiliary spring which reciprocates above-mentioned action, thus having the desired object as can be seen in Fig. 1, of steeringhook D clear of its. respective knife.

Cast on frame 0 are bearings O carrying rollers, C Said rollers, in order to create the necessary movement on frame 0, are acted upon by lugs 0 cast on upright motion bars X. Frame 0 slides in slots 0 cut out in bars (J. Opposite to this lies a bar (J to prevent' frame 0 from sliding out at that end. It will thus be seen, alluding to hook D in Fig. 1 that as the nether oblong U shaped part of hook D marked D in Fig. 1, and passing through oblong holes D is bent so as to rest on cross bars D whenever rollers C pass lugs C on motion bars X frame C will, sliding in its grooves, be pushed away and hook D resting in before-mentioned manner with its lower bent end on frame 0 will be given a motion that will have the desired effect of allowing the upper part of said hook D to pass and repass its knife without coming in contact with it and frame 0 will, after being pushed over far enough be given a reciprocate motion to that rendered by lugs acting on rollers C by the spring 0 return to its normal position until acted upon again.

The upper lifting grate E is carried by the upright motion bars Z, and the lower lifting grate F is carried by the upright motion bars X, and these upright motion bars may be actuated byany suitable mechanism so as to operate the said grates alternately. The hook D which I employ is similar in construction to that shown and described by the patent to Oharcot, No. 500,852, dated July 4, 1893, the said hook having a projection for engaging the grate E, another projection for engaging the projection F, and a third projection for engaging the upper stationary grate D, as Well as a fourth projection for engaging with the lower stationary grate D.

My last improvement the bar frame with lever attachment is constructed in the following manner, reference being had to Fig. 8 showing said frame and lever attachment and Fig. 9 being a side View of Fig. 8. Above the stationarygrateD and fastened on foursquare pins D fixed on said grate is a frame D which has as many bars D as there are rows of hooks D employed in the mechanism, running horizontally across the jacquard and immediately in front of each row of hooks. Said bars D are fastened in a frame work which is movable back and forth according to the action on a lever arm I and is connected with such .lever by two bars 1 fastened appropriately to the two arms 1 of said lever attachment. The frame D being thus secured to arms 1 there is provided a means for giving said frame D a reactionary motion after its being pulled out by lever arm I by springs D coiled around bars D andlying between lugs D cast on frame 1) and the two front pins D, connecting D with the upper stationary grate D. These springs will, when frame is pulled out, becom pressed between the square pins D and the lugs D and will, on being allowed to resume their ordinary positions, carry frame D back with them.

The lever attachment is composed of a square bar I pivoted in two lugs 1 cast on frame A and lying horizontal, enabling weaver by a downward pull to manipulate same. Bar 1 hasasingle arm I, having a hole I drilled init in which is fastened a cord or chain 1 within reach of the weaver, who,

when he wishes at any time to adjust any of his threads or otherwise examine his work, can throw his shed level by pulling such cord attached to the eye 1 in arm 1 thereby pulling out bar frame D which, by means of the bars D lying immediately in front of hooks D as above described, will pull these back from their knives on grate D and thus attain the desired object. The frame D will immediately upon the release of the weavers hold upon cord, move backto its original position by the action of springs D as described.

Having thus described my invention, what I claim as new, and wish to secure by Letters Patent, is-

1. In a Jacquard mechanism, the cradle, the pattern cylinder and the needles, the cradle being provided with openings'adjacent to the ends of the pattern cylinder, in combination with a pair of sliding bearings supporting the pattern cylinder and moving in the said openings, means for vibrating the cradle and cyl inder, each bearing having a prong at the front and also one at the rear, two right angled canroperated levers acting on the prongs at one side of the bearings to give the cylinder an additional movement toward the needles, and two springs acting on the prongs at the other side of the bearings to reciprocate the movement of the angle levers, substantially as described.

2. In aJacquard mechanism, the cradle, the pattern cylinder and the needles, the cradle being provided with openings adjacent to the ends of thepattern cylinder, in combination with a pair of sliding bearings supporting the pattern cylinder and moving in the said openings, means for vibrating the cradle and cylinder to and from the needles, the bearings for the pattern cylinder being notched at their top edges, vertically movable locking tongues sliding on said cradle and engaging the said notches, and means for moving said tongues into and out of engagement with the notches, substantially as described.

3. In aJacquard mechanism,the cradle,the pattern cylinder and the needles, the cradle being provided with openings adjacent to the ends of the pattern cylinder, in combination with a pair of sliding bearings supporting the pattern cylinderand moving in the said openings, means for vibrating the cradle and cylinder, eachbearing having a prong at the front and also one at the rear, two right angled cam-operated levers acting on the prongs v their top edges, Vertically movable locking tongues sliding on said cradle and engaging said notches, two elevating rods for moving said tongues into and out of engagement with the notches, the horizontal motion bars, and

two are shaped projections thereon co-acting with the elevating rods, substantially as described.

In testimony that I claim the foregoing I I5 have hereunto set my hand this 14th day of July, 1894.

\ GIUSEPPE PAVIA.

Witnesses:

GILBERT C. HIGBY, AXEL BEEKEN.

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