US897568A - Loom-dobby. - Google Patents

Description

No. a97,5es. l PATENTBD SEPT. 1, 190s.'

\ E. H. BALLoU.

LooM BOBBY.

LPPLIOATIOI FILED IDEOl 27', 1905.

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UNITED STATES PATENT OFFICE.

EUGENE H. BALLOU, OF PAWTUGKET, RHODE ISLAND, ASSIGNOR OF ONE-HALF TO LOR- RAINE MANUFACTURING COMPANY, OF PAWTUGKET, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

LOOM-BOBBY.

To all whom it may concern:

Be it known that I, EUGENE H. BALLOU, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented a new` and useful Im rovement in Looin-Dobbies, of which the fo lowing is a specification.

This invention has reference to an improvement in looms and more particularly to an improvement in the shedding mechanism or dobbies of looms in which one set of ack hooks are operated directly by an alternate indicator finger of the series of indicator iingers acted upon by the pattern chain and theV other set of )ack hooks operated by alternate indicator fingers through the usual lifting needles.

In the usual construction of the harness o erating mechanism of a loom, known as t e dobby, each bar of the pattern chain has two rows of pegs. One alternate series of indicator fin ers are operated from one row of pegs and t e other alternate series from the other row of pegs on the same bar. The first alternate serles of indicator fingers operates the lower jack hook directly and the second alternate series of indicator fingers operates the upperjack hooks through the lifting needles in the usual way. The lifting knives move alternately at each successive pick of the loom and when the jack hooks engage with them the corresponding harness is raised or lowered. One row of egs on the bar of the pattern chain determines which harness and war threads shall be raised for a certain pick of t e shuttle, and the other row of egs on the same bar determines the raising of) the harness and warp thread for the next succeeding pick of the shuttle. One bar of the pattern chain, therefore7 represents two picks in the woven fabric and the pattern chain must have a sufficient number of bars to control the springing of the warp for the pattern of the whole length of the fabric.

In the weaving of a variety of goods such as fabrics having a stripe or plaid'effect or fabrics in which a knotted thread is thrown in at intervals, the length of the pattern chain required is objectionable on account of its cost, of labor and pegging, and the mechanism and power required to carry andoperate it.

The object of my invention is to improve the construction of a loom dobby whereby fabrics having a stripe or plaid effect or in which a knotted thread or a peculiar weave Patented Sept. 1, 1908.

serial No. 293,443.

or pattern is followed. or preceded by a field of a plain weave or another pattern, can be produced with a short length. of pattern chain.

Instead. of using each bar of the pattern chain to control .the warp threads on two successive picks, as is the usual method heretofore used, in the pattern chains used in carrying out my invention, each bar controls the springing of the warp for one pick only, and yet by the use of a controlling mechanism, which will be more fully described hereinafter, a short pattern chain or, for some weaves, a cylinder provided with a attern surface, will be suiiicient to weave fa rics of any desired length in which two kinds of patterns or weaves are used at predetermined intervals.v

My invention consists in the peculiar and novel construction of mechanism operatively connected with a loom dobby, whereby the indicator fingers are operated by a short pattern chain for one weave and then operated by another short attern chain for another weave, thereby e iminating the use of a long pattern chain and the consequent cost and power required to drive the same, as will be more fully set forth hereinafter.`

Figure 1 is a vertical sectional View of a loom dobby provided with my improved indicator finger operating mechanism.. Fig. 2 is a detail sectional view, showing the means for operatively connecting the indicator finger mechanism with the shuttle box operatmg mechanism of the loom, and Fig. 3 is a face view of the indicator finger grate frame of my improved indicator linger operating mechanism.

In the drawings, a indicates the end frame of a loom dobby usually secured to or forming a part of the side frame of a loom, a a vi rator arm secured to a shaft a2 supported in bearings in the end frame a, a3 a3 rods pivotally secured to the ends of the vibrator arm a', a* a4 knives pivotally secured to the ends of the rods a3 a? and having a sliding reciprocating movement in ways a5 a5 in the end frame a, and a6 a harnesslevers of thenumber required to weave the patterns. In the osition shown in Fig. l all the other harness evers are directly back of the one shown and all are pivotally secured to the shaft a7 su orted in the end frame o. Each of t e arness levers have a connector arm as ivotally secured at its center to the harness ever. .Upper .and lower jack hooks a and a1 are pivotally secured to the `ends of the connectlng arm as in a osition for the hooked ends of the jack hoo s to engage with the knives a4 a4. A double series of indicator fingers a a having the outer ends 0,12 a12 are pivotally secured to the shaft (L13 supported in the end frame a. In one alternate series of the indicator'iingers a a each has the upwardlybent inner end a14 adapted to engage with a lower jack hook al and the other alternate series of indicator fingers each has the straight inner end (1)5 adapted to engage with a needle al which in turn engages with an upper jack hook a", the needles being supported in the usual way in bars secured to the end frame a. So far as now described the construction is the usual construction of a dobby harness operating mechanism.

In carrying my invention into practice lI secure the L-shaped frames b b to the lower outer ends of the end frames e a of the dobby by bolts, as shown in Fig. 1. These frames are each constructed to have bearings for the sprocket shafts c and d of the pattern chain sprocket c and the auxiliary pattern chain sprocket d and the upwardly-extending arms b and b2. The cross rods b3 b3 are secured in the ends of the arms b and b2 and a supporting bar b* is secured to the frame b I) intermediate the shafts c and d. The sprockets c and d secured to their respective shafts, and the pattern chains c2 and 'd2 with their egs c3' and d3 are of the usual construction. he sprocket shaft c is revolved by a worm and gear (not shown) forming a part of the loom mechanism, and the sprocket shaft d is revolvedby a sprocket chain e connecting the sprocket e on the shaft c with the s rocket 'ea on the shaft d, as shown in broken ines in.

Fig. 1.

A series of spaced indicator levers ff are pivotally secured to the rod b3 on the arm b above the pattern chain c2 in a position for the inner ends of the levers to rest on the bar b4 and for the egs on the pattern chain to engage with the levers, and a series of alterternately-spaced auxiliary indicator levers g g are pivotally secured to the rod b3 on the arm b2 above the auxiliary pattern chain d2 in a position for the inner ends of the levers to rest on the bar b4 and for the pegs on the auxiliary pattern chain d2 to engage with the levers. The bar b4 holds the levers f and g in their'normal position free of the pattern chains and prevents the same from wearing on the pattern chains. Two brackets h h, each having the downwardly-extending arm h with the bearing 7L, are secured to the upper outer end of the frame a of the dobby by the bolt h3 in a position to bring the bearing h2 on a vertical line with the bar b4 or centrally with the inner ends of the indicator levers f and g. swinging grate frame 'i having the arms i L supporting the lower cross bar 'i2 in which is a series of vertical holes fi, t3, the

lsecured at the upper end of the arms t" 'i' to the bearings h2 h2 on the brackets 7L 7L in a position .for the ends 0.12 a of the indicator fingers all e to pass through the openings t i in the frame and rest on the heads of the pins and for the indicator levers f or g to engage with the pins. A link 7c is pivotally secured at one end. to the -rear arm i of the frame 'i and at the other end to the vertical arm l of a bell crank lever l having the horizontal arm Z2. This bell crank lever lis pivotally secured to a shaft m supported in a racket m which is secured to a part of the loom frame. A series of levers n n are pivot- 'ally secured to the shaft m, and the rods n a are pivotally secured to the free ends of the levers, as shown in Fig. 2. These rods'n a are operatively connected to the shuttle box operating mechanism of the loom (not shown). The chain o controlling the shuttle box operating' mechanism has a series of collars o adapted to engage with the levers 'a n and one or more off-set collars p adapted to engage with the horizontal arm Z2 of the bell crank lever Z. The chain o (only a part of which is shown in Fig. 2) is continuous andis moved in the direction of the arrow by revolving the sprocket oZ on the shaft 03 which is revolved by .the usual worm and gear forming part of the loom mechanism.

A coiled spring s is secured at one end to the rear arm i of the frame i and at the other end to the frame a of the dobby, as shown in Fig. 1. The spring s holds the frame 'i in its no rmal position with the pins i7 i? over the indicator levers f f, as shown in full lines in Fig. 1.

In the operation of my improved loom dobby the pattern chain c2, the auxiliary pattern chain d2 and thev shuttle box controlling mechanism chain. o are revolved by the loom mechanism, as described. The pegs c3 c3 on the bars of the pattern chain c may be set to weave a plain pattern and the pegs d3 d3 on the bars of the auxiliary pattern chain d2 may be set to weave a fancy pattern. The pins i7 i7 in the swinging grate frame i are held in their normal position over the indicator levers f f by the tension of the s ring s, as shown in full lines in Fig. 1, or so ong as there is an absence ofthe off-set collars p p on the shuttle box` controlling mechanism chain o. With the mechanism in this position a plain Weave. may -be woven by the pegs c34 c3 on the bars lof the pattern chain c2 engaging with and raising the pins 'i7 "i7 the indicator levers f f alternately and throu h raise the ends a a12 of the in icator fingers at a a and allow a jack hook a or a10 to engage with the knives a* a* to o erate the harness levers af a and raise t e harnesses in the usual way. At the end of the lain weave an off-set collar p on the shuttle box controlling mechanism chain o engages with and raises the arm l2 of the bell crank lever l and through the arm Z of the bell crank lever and the link k moves the frame i and the pins i7 over the indicator levers g g, as shown in broken lines in Fig. 1, against the tension of the spring s. A fancy weave is nowwoven through the operation of the pegs d d3 on the bars of the auxiliary pattern chain d2 engaging with and raising the auxiliary indicator levers g g which, acty ing on the pins i7 i7, raise the ends a2 a,12 of t'he indicator fingers a a, which allows the A.jack hooks to engage with the knives and operates the indicator harness as described. When an off-set collar p on the shuttle box controlling mechanism chain o passes the arm ll of the bell crank lever l, the framei assumes its normal position by the tension of the spring s and the plain weave commences again, and thus o )erations may be repeated indefinitely wit short pattern chains, thus eliminating the cost, labor in pcgging and mechanism and power required to car and operate a long pattern chain.

Having thus described my invention7 I claim as new and desire to secure by Letters Patent 1. In a loom dobby comprising dobby frame indicator fingers and a swinging frame 'i having .the arms 'i' i supporting the lower cross bar i in which are the vertical holes 1'. i, said frame also provided with an upper cross bar i* and vertical connecting bars i5 'i between the upper and lower cross bars forming the openings fi i for the indicator fingers of the dobby, pins i? i7 in the holes i 1,3 and having the heads i is in the openings fi" i, means for pivotally securing the swinging frame 1', to the dobby frame, means for swinging the frame at predetermined intervals, the pattern chain, the auxiliary pattern chain, and means for alternately connecting the pins fi" 'i7 with a pattern chain or an auxiliary pattern chain.

2. The combination with a loom dobby, of frames b b secured to the dobby frame, rods b3 b3 supported in the frames b b, a bar b4 suported in the frames, b b, a shaft c supported in bearings in the frames b b, a sprocket wheel c secured to the shaft c, a pattern chain c2 on the s rocket 'wheel c and having the pe s c3 c3, a s aft d supported in bearings in the rames b b, a sprocket wheel d secured to the shaft d, an auxiliary attern chain d2 on the sprocket wheel and Iiaving the egs d3 cl3, a sprocket wheel e secured to the s aft c, a sprocket wheel e2 secured to the shaft d, a chain e connecting the sprocket wheels e and e, a series of indicator levers ff pivotally secured to the rod b3 over the pattern chain c2, a series of indicator fingers, a series of auxiliary indicator levers g g pivotally secured to the rod b3 over the pattern chain d2, brackets h h secured to the frame of the dobby each having the arm h with the end bearing h2, a swinging frame 'i having the arms 'i' t pivotally secured to the bearing h in the racket h and sup orting the lower cross bar i2 in which are t e vertical holes L3 i3, said frame also provided with an upper cross bar i4, and vertical connecting bars 'L5 i5 between the upper and lower cross bars forming the openings i fi for the indicator fingers of the dobby, pins i7 L7 in the holes fi? i3 and having the heads i 'is in the openings fi i", a link k pivotally secured to the rear arm 'i' of the frame i, a bell crank lever l pivotally connected to the link k, a coiled spring s connected to the frame i and to the frame of the dobby, and means for operating the bell crank lever Z at predetermined intervals.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EUGENE H. BALLOU.

Witnesses:

ADA E. HAGERTY, J. A. MILLER.

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