US947574A - Dobby. - Google Patents

Description

O. G. FORSTBR.

DOBBY.

APPLICATION FILED mm". a, 1909.

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Patented Jan 25, 1910.

0. c. PORSTER. DOBBY.

APPLICATION FILED JUNE 8, 1909. I 947,574. Patented Jan. 25, 1910.

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DOBBY.

APPLICATION FILED JUNE 8, 1900.

Patented Jan. 25, 1910.

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UNITED sTATEs PATENT OFFICE.

CARL C. FORSTER, OF FALL RIVER, MASSACHUSETTS.

DOBBY.

To all whom at may concern:

Be it known that I, CARL C. Fons'rnn, a citizen of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented a new and use ful Improvement in Dobbies, of which the following is a specification.

This invention relates to a new and useful improvement in the construction of dobbies, more particularly to double-index (lobbies.

In (lobbies of this class as at present constructed as far as I am aware, it is necessary that the pattern-chain should be provided with an entire complement of pegs, that is, there must be pegs enough to equal the number of times the fingers are to be acted on in weaving a desired pattern. For example, it may be necessary in weaving a certain pattern that a row of pegs should extend entirely around the pattern-chain, the peg being repeated in every bar of the chain. In such a case all the pegs in that circumferential row successively engage the same finger of the dobby and keep it in constant action throughout the weave, so that should the pattern-chain comprise twenty bars that finger will be raised twenty times in a single repeat of the chain.

In my present invention or improvement, when the pattern is such that there would ordinarily be a line of pegs to successively raise a particular finger, I do away with that line of pegs, leaving a line of empty sockets or holes, and swing up in advance a block or rest which will hold that finger in a raised position until said line of holes has passed under it, thus operating to weave that portion of the pattern as effectually as if the said finger were raised successively by a row of pegs. If for instance the pattern were such that ordinarily a line of twenty pegs, one in each bar, would twenty times successively raise a given finger, that entire line of pegs by means of my improvement would be omitted or removed from the patternchain, and a single rest or block would be swung up under the finger lifting the finger once instead of twenty times. My invention therefore by reducing the number of pegs necessary to the weaving of a given design simplifies the pattern-chain and its operation with relation to the fingers, renders its construction more economical, decreases the liability of mistakes inthe weave, minimizes the danger of the pegs splitting the bars of the pattern-chain and of the pegs working Specification of Letters Patent.

Application filed June 8, 1909.

Patented Jan. 25, 1910.

Serial No. 500,933.

loose and dropping out thereby producing imperfections in the cloth, and prolongs the life of the (lobby.

The nature of the invention is fully described bclow, and illustrated in the accompanying drawings, in which Figure l is a cross sectional view of the dobby with my improvement embodied or attached. Fig. 2 is a partial front view with a part of the pattern-case broken away. Fig. 3 is a partial plan view enlarged of the improvement. Fig. t is an end view of the same. Fig. 5 is a section taken on line 55, Fig. 3. Fig. (5 is a view in perspective of one of the finger-buttons or rests removed.

Similar numerals of reference indicate corresponding parts.

lleference-munerals l0 and 11 represent the end frames of a (lobby provided with slots 12 and 13 in which the lifter-bars 14- and 15 slide for operating the hooked jacks l6 and 17 pivoted at their rear ends to the back or com'iector 18 which is pivoted at 19 to the harness jack or notched (lobby-lever 20. These hooked jacks l6 and 17 are moved back and forth in the well known manner by means of the lifter-bars 14 and 15 when the hooked ends of the jacks drop into their paths.

21 represents the patterrnchain.

represents the raised fingers pivoted at 23 to the lower end frame .11 and extending up at 24: into the guide-slots in the grate 26, and into engagement with the lower hooked jacks 17.

27 represents the unraised fingers pivoted at 23 to the end frame 11 and with their rear ends 28 extending into the guideslots 25) in the lower g 'ate.

30 represents the vertical rods orneedles which extend from the lower grate 2G to the upper grate 31.

Thus far the parts and their operation are well known in the art, the working of the dobby being as usual, the stops 32 and 33 being used alternately as pivots for the jacks or connectors 18 when the hooked jacks are actuated.

he represents the front wall and 35 the end walls of a substantially rectangular frame. preferably metallic. said frame being provided with a rear wall 36 preferably formed with a rearwardly extending lip 36, the frame being provided with neither top nor bottom, all said walls being preferably of one integral piece, and the rear wall being provided with pair of in thiscase at its opposite ends in the end walls 35 below vertical slots or notches 40 in which the opposite ends of a somewhat heavy bar or weight 41 are adapted to rest, said bar being preferably provided with heads 41 at its ends to prevent displacement.

Pivot-ally supported on this rod 39 are a series of finger-rests or buttons which are adapted to be swung in a vertical plane and rest by gravity either upon the lip 36 in which position they will lie between two of the guide-pins 43 and over the wood-rack 42 as illustrated in Figs. 1, 4 and 5, or to be swung up into the position illustrated at the right in Figs. 1 and 5. Each of these finger-rests or buttons consists of a hub portion or main portion 44 whose edge 45 is flat, and a wing 46 provided with a flat edge 47 and an extension 48. The fiat edge 47 is adapted to rest by gravity on the upper edge of the lip 36 of the rear wall 36 of the case, and the flat edge 45 is adapted to receive the weight or heavy bar 41. The curved portion 49 of the hub 44 is adapted when the button is swung back to bear against the inner surface of the rear wall 36 and hold the finger-rest or button by gravity in such position away from the wall 34, thus preventing it from becoming jammed against said wall and hence not easily moved out of the position shown at the right in Fig.

In operation, if the pattern is such that there-would be a straight row or line of pegs across the bars of the chain which in ordinary cases would successively raise a particular finger, that row is left without any pegs in the sockets, and the finger-rest or button which would be in line with said row is swung forward into the position indicated in Fig. 4 between two of the pins 43, such position being also illustrated in Figs. 1, 2, 3 and 5. hen the chain is set in motion that finger-rest or button which rests on the lip 36 holds up the finger which moves in line with the rest or button and takes the place of all the pegs which otherwise would have been in that row. There may be of course, a number of lines of pegs which may be omitted, and a number of finger-rests or buttons which take their places and operate on the weave exactly as the pegs would operate in ordinary dobbies. In practice it is advisable to lay the weight or heavy bar 41 in the position illustrated in the drawings in order that the fingerrests or buttons which extend over the woodrack may be held firmly in position, and may not be affected by the jar of the machine; The other finger-rests or buttons are swung back, as illustrated in the drawings, toward the wall 34 of the case, being held in such position by the contact of the curved edge 49 with the wall 36. An examination of Fig. 2 of the drawings will show that in line with each rest or button which is swung between a pair of guide-pins 43 with its edge 47 resting on the lip 36, is a row of empty sockets indicated at 50, the other sockets being represented as being provided with pegs. In Fig. 2 therefore there are five rests or buttons in operative position, and, of course, five rows of empty sockets extending across the bars and circumferentially along the chain for such distance or distances as the requirements of the pattern render necessary. Preferably the portions 48 of the rests or buttons are made smaller in order to extend between a pair of adjacent guide-pins. It will be understood that whichever way the fingerrests or buttons are tilted they rest by gravity, the bar or weight (which may be of any desired shape) simply preventing vertical or endwise movement by jar.

While the shape of the finger-buttons or rests illustrated is perhaps preferable to any other, do not confine myself to such shape and may use a tilting or moving support of any shape which will be operative for the purpose and in the connection described.

In the drawings,thedotted lines in Fig. 5 represent quite accurately the position of two of thefingers, the finger 22 being held raised by the rest or button which is tilted forward and supported by the lip 36 and the finger 27 being free to be operated by the pegs which pass under it, as the rest or button which is in line with the finger 27 is 105 tilted back and sustained in such position by the curved portion'49 resting against the inner surface of the wall-36.

In Fig. 3 the majority of the rests or buttons are swung'into operative position, and 110 held therein by the weight 41, said weight serving not only to hold the operating rests or buttons in position, but also to prevent those which are not operating or acting as rests from swinging over the wood-rack.

In the drawings a considerable space is shown between the front wall'34 and the portions 46 of the rests when they are swung toward said wall. In practice there may be much less space if desired, as itis only nec- 120 essary that the said rests should not come into actual contact with said wall and rest against it.

Having thus fully described my invention, what I claim, and desire to secure by Letters 125 Patent, is

1. In a dobby of the character described,

a supporting frame secured to the dobby adjacent to the wood-rack, a series of individually and independently tilting finger- 130 rests or supporting buttons pivotally sustained by said f ame in line with the fingers, and means for holding the finger-rests or supporting buttons in position when they have been tilted under the raised adjacent front ends of the fingers corresponding to the several finger-rests. for the, purpose set forth.

2. In a (lobby of the character described, a supporting frame secured to the dobby adjacent to the wood-rack, a series of fingertests or supporting buttons sustained by said frame and each adapted to be individually and independently moy'ed into a position under and in line with the raised adjacent front end of a corresponding finger, and means for holding such finger-rests or supporting buttons as have been moved into said position with relation with the corresponding fingers securely in such position, for the purpose set forth.

3. In a dobby of the character described, a supporting frame secured to the (lobby, a series of tilting finger-rests or supporting buttons pivotally sustained by said frame in line with the fingers, and a weight or bar adapted to rest on the finger-rests or snpporting buttons when they have been tilted under the raised adjacent ends of the fingers, for the purpose set forth.

I. In a (lobby of the character described, a supporting frame secured to the (lobby next the wood-rack and comprising a front wall a rear wall and end walls. a rod extending longitudinally through the frame and supported by the end walls, and tilting fingerrests or supporting buttons pivotally sustained by said rod and adapted to be swung under raised corresponding fingers and support them, and to be sustained in such position on said rear wall. for the purpose set forth.

.3. In a dobby of the character described, a supporting frame secured to the dobby next the wood-rack and comprising a front wall a rear wall and end walls, a rod extending longitudimllly through the frame and supported by the end walls, tilting finger-rests or supporting buttons pivotally sustained by said rod and adapted to move endwise thereon and to be tilted under raised corresponding fingers and support them in such raised position and to be tilted out of supporting contact with said lingers, and a comparatively heavy bar extending longitudinally in said frame and resting on the fingerrests or supports which are tilted under the fingers and between them and the fingerrests or supports which a re tilted away from the fingers thereby preventing endwise or rotative movement, for the purpose set forth.

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

( ARL FORWIER.

Witnesses HENRY W. WILLIAMS, M. A. A'rwool).

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