US939299A - Pattern mechanism for looms. - Google Patents

Description

H. A. OWEN '6: A. K. PRATT.

PATTERN MECHANISM FOR LOOMS.

APPLIGA TION FILED snr'r. 28. 1906.

939,299. Patented'Nov. 9, 1909.

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PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. 28, 1906.

Patented Nov. 9, 1909.

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A ttest H. A. OWEN & A. K. PRATT. PATTERN MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. 23, 1906 939,299, I Patented'Nov. 9, 1909.

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HENRY A. OWEN-AND ALBERT K. PnATT, oTwHITiitsviLLE', MASSACHUSETTS, As-

srenons To THE WHITIN MACHINE woRKs-oFwHITINsvILLn, MASSACHUSETTS,

A CORPORATION OF MASSACHUSETTS.

PATTERN MECHANISM FOB LOOMS.

- nection with the accompanying drawings,

is a full, clear, and concise specification.

Our invention relates to pattern mechanisms of looms which employ shifting shuttle boxes in conjunction with the usual shedforming pattern mechanism and consists in the arrangement and relative disposition of the several parts, hereinafter described, whereby a single set of pattern controlling elements and single operating means therefor may be effectively employed for controlling both the filling and the warp patterns.

More especiallythe invention consists in adapting certain of the elements of the ordinary dobby of pattern looms for controlling the drop-box motion, which enables such looms to be made with all the advantages of looms having separate drop-box patternmechanisms without the disadvantage and expense of their more complicated construction.

Another object of the invention is furthermore to produce such a form of duplex c011- trol which is simple in; operation and construction and which can be applied without material alteration, to existing looms.

In the drawings filed herewith only so much of the ordinary loom dobby is exhibited as is necessary to illustrate the practical application of our invention.

Figure 1 is a view in elevation of the dobby end of a pattern loom, parts of the pattern chain and chain drum being broken away to illustrate interior construction. Fig. 2 is a side elevation of Fig. 1, with parts of the dobby frame broken out; and Fig. 8 is an enlarged detail of the pattern chain and associated parts.

The general construction of the apparatus shown in the drawing will be recognized by those familiar in this art.

A represents the loom frame and B represents the lay thereof operated in the usual manner by the crank-shaft G. Y

The shifting shuttle boxes (not shown in Specification of Letters Patent.

Appl icaqon filed September 28, 1906.

Patented Nov. 9, 1909.

Serial No. 336,559.

the drawings), which carry vthe different fillings to be woven into the cloth, are mounted in-the usual way upon the rod D which travels back and forth in unison with the lay, and the adjustment or, shifting of the boxes under the call of the pattern, is effected by the drop-box motion indicated generally by E. This mechanism is connected with the power shaft of the loom and is only called into operation when a change in the filling is desired, at which time it is coupled to its driving element to effect the change.

. The loom dobby, attached as usual to the end of the frameA atits upper part, comprises two side-frames F, F, between'which are mounteda series of pattern controlling levers G, G, the ack-leversH carr1ed-there-,

by, the jack'hooks H pivotedon'the ends of the levers,the indicator levers H andalsothe pattern chain-I :which'is carried upon its.-

usual chain-drumbythe cross-shaft I j ournaled in the lower part of the dobby frame.

The shaft I is driven through the instrumentality of a slip clutch I by a worm. gear.

P, which latter meshes with a worm I driven by sprocket chain connection and gear I from the crankshaft C. On the opposite end of the pattern chainv shaft there is a hand wheel I by means of which said shaft and consequently the positionof the patternchain, may be adjusted independently of its actuation-by the worm gear'lfl-the said gear slipping on the clutch I during such adjustment. The pattern levers G are selectively operated in accordance with the arrangement of the pegs or protuberances on the pattern chain in well understood manner, through the instrumentality of the jack levers and hooks which are raised and lowered by the indicator levers H into and out of connection with the reciprocating knife bars J, J, these knife bars being reciprocated in the slots F of the frames F by means of the usual actuator arms J, J and connections J on the outside of the frames, which arms are carried upon the rock-shaft J and operated by the connecting rod J from the gear I".

The parts above described are the usual parts of the dobby of familiar construction and have the same principle of operation.

In accordance with our present invention,

of protuberances for controlling both the drop-box motion and the shed= forming mechanism. Preferably the protuberances which control the drop-box motion are located on the side of the chain which is toward the rear of the loom or adjacent the driving gear 1*. Themajor part of the levers, such as G, are constructed the same as ordinary harness levers, being mounted on a common fulcrum or cross-shaft G of the dobby frame and connected at their upper ends with the cords G which operate the harnesses of shed-forming mechanism in well understood manner. The levers G, Gr which correspond in position with the filling pattern protuberances on the pattern chain are similar to the shed-forming levers Gr, being also adapted to actuate harnesses if desired, but have, in addition, depending arms G on the opposite or lower side of the fulcrum which are adapted to be connected with the drop-box motion E for producing shift of the boxes when operated. As shown in the drawings the depending arms G are offset toward the front of the machine and have cam engagement respectively with two lifter levers K, K, mounted side by side on bracket L, and respectively connected through suitable springs with the lifting rods K K and the latter, when operated, serve'to shiftthe mutilated pinions of the drop-box motion E, by means of the rockshaft K and connected-links and cranks in the same manner as the said pinions are ordinarily shifted in looms having special dropboX pattern motions. The depending arms G are provided with rollers to reduce the friction between the same and the lifter levers K K, the cam engagement of the arms with the levers being produced by the curve of the upper surface of the latter engaged by the rollers so as to rock the said levers on the fulcrums. But it will be understood that other forms of controlling means betweenth pattern controlling levers and the drop-box motion E may be employed with equal effect.

The pattern which is to be woven in a loom constructed as above described, de pends for both warp and filling on the pegging of a single chain which is manifestly easy to ad ust and attend, and in the case of a mis-pick there is no possibility of a confusion of the patterns when the chain has to be turned backward. The arrangement of the several pattern controlling levers in one frame and operated by a single train of gearing facilitates the cleaning and inspection of the machine and makes the pattion, in combination with means for selectively and similarly operating all of said chain shaft with means for manually and independently rotating the same and a single pattern chain carried by said shaft between the aforesaid side-frames.

In testimony whereof, we have signed our names to the specification in the presence of two subscribing witnesses.

I HENRY A. OWEN.

ALBERT K. PRATT. Witnesses:

HARMON O, NELSON, OSCAR L. OWEN.

levers comprising a clutch-driven patternv

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