USRE1901E - Improvement in looms - Google Patents

Description

BEST AVAILABLE COPY No. LWL-MERRILL A. Flrnnusn, Philadelphia, Penn.. and GEonGE CROMPTON, Wm cester. Muss., assiguces ol' EDWARD W. BROWN, Fall River. 31u55.-Luom.-Pareured July 23, 1:54: reissued March 14, .l l:'.

Cillian-Hist, rh:- crunliination of the pattern c-lmiu, the pawls, and the r alcun, sulismntlully a:- described.

` consu-uned und upcratiug s11b:-,-mutiz1ll}A as herein described. to r 'u either direction, or remain au naar, as desired, for the purpose specified. :he reversible zapper shaft, o combination with :be pawls or their equivalents, construcred und arranged substantially as decriiied aud for lhe purpose specified @"ersible tappet UNITED STATES PATENT OFFICE.

OF YVOONSOCKET, RHODE ISLAND, ASSIGNOH T() MERRILL FIIRBUSH, 0F PHILADELPHIA, PENNSYLVANIA, ANI) GEORGE (QUBIPIUN, UF 'URCEST'ER, MASSAH USE'ITS.

IMPROVEMENT IN LOOMS.

Speclication forming part oflmiters Patent No. 11,352, dated July 95, 1354; Reissue No. 1,9'0 I, dated March 14, 1865.

To all whom it may concern.-

Be it known that l, EDWARD W. BRowN,' of VOOnSOCket, in the State of Rhode Island, formerly of Fall River, in the county of. Bristol and State of Massachusetts, haveinvented certain new and useful Improvements in Looms for Teaving Checks and Plaids; and I hereby declare the following io be a full, clear, and exact description ot' the same, reference heilig had to the annexed drawings, making a part of this specication, in which- Figure l is an isometric perspective of a f loom with my improvements attached, those portions of theloom not necessarily connected g with my improvements not being represented. Fig. 2 is a transverse section through the@ same, immediately in front of the ratchet-2 wheel upon the cam-shaft. Fig. 3 is an iso metric view of the box-cam, which may be emi ployed to give motion to the shuttle-boxes in i place of the arran gement represented in Fig. 1. Fig. 4 is a front view of the cam-wheel represented in Fig. 3. Fig. 5 is a view ofi the cam represented in Fig. at K.

In fancy-looms, as heretofore constructed l it has been common to operate the dropboxes by means of a series of tappets or a1 tappet-wheel upon a tappet shaft, which was f rotated intermittently by a pawl so combined willi the pattern-chain as to engage or t not engage with the tappet-shaft, and rotate t it or leave it at rest, according to the alterat tions of the pattern-chain. This arrangement i presented the advantage, among others, that i the order of the tappets being according to the option of the weaver, he wasenabled to 5 adapt his apparatus to weaving with two l shuttles, or to weaving with three shuttles, according to the character of his pattern; but l from the fact that the tappet shaft was rot tated in one direction only, it was not always l possible, where three shuttles were used, to l make the desired transition from one shuttle to another.

By giving to the tappetshaft a motion g about its axis in either direction, or permitting it to rest at pleasure, it will be perceived that while retaining the advantages above referred to the Weaver is enabled to interchange three shuttles inany order desired and weave ,i

any variety of pattern which that. number of F, and having teeth pointed indifferent directions.

In Fig. 1, H is a cogwheel secured to the tappet-shal't'F.

l is a cog-wheel made fast to the cam K, the two running together loosely upon the shaft F.

L is a short shaft secured to the main frame,

having a cogged pinion, c, and a cogwheel, Mr, running together loosely thereon. The wheel M engages with the wheel I, and the wheel H with pinion c. The cam K, Fig. 5, has three rests, d ef, one hundred and twenty degrees distant from each other, andthe gears H U M are so arranged and proportioned with respect to each other that when the tappetshaft is revolved an amount equal to the length ot' one of the teeth of the ratchet-wheels a b the cam shall be caused to make the 'third of a revolution.

N is a lever pivoted near its center, at g, and carrying a roller, h, at one end, which rests against the periphery of the cam K, and is made to bear upon the rests d e f as the cam revolves. '.lhe other end of the lever N is connected at li with the foot of the apparatus which raises and lowers the boxes, but which, not differing from that usually employed for this purpose, is not shown in the drawings.

O is the pattern-chain, which governs the motion of the tappetshaft. This chain is made to revolve intermittently upon the shaft P in the usualmanner by means of the connections (seen in Fig. 1) with the lathe-shaft E. The spindles l of this chain may be made to carry rollers of two different sizes, m n., or they may run empty.

Q is a bent rod sliding freely up and down in mortises in the supports'p and connected with the arm R, by which the pawls S S' are actuated.

T is an arm pivoted to the framework at r, v

and borne against the cani L.r upon the main driving-shaft B by the spring YV.

The pawls S and S are connected together in the following manner: The former is pivoted to the arm T at rIhe pawl S is secured to the pawl S at r, the two being allowed to move t'reely upon the point t. It', now, the pattern-chain U be in the position represented in Fig. 2, the rod Q will be raised io its extreme height by the rollers m, and the pawl S will Y be brought in contact with the ratchet-wheel b, and as the main sha-ft P revolves the cam U vibrates the arm T, and the cani-shaft F is revolved in the direction indicated by the red arrow, Fig. 2, and the shuttle boxes are raised or lowered, as the ca-se may be, according to the position of the cani K. When the roller n is beneath lthe horizontal portion ofthe rod Q, neither of the pawls S S is in contact with its ratchetwheel, and as the cani U revolves no motion will be communicated to the shaft F, and the shuttle-boxes remain stationary. Vhen, by the revolution of the pattern-chain, one ot' the spindles l intervenes between the shaft P and the rod Q, the latter descends to i its lowest position, and the pawl S comes in contact with the teeth of t-he ratchet-wheel a, g and as the cam U revolves the cam-shaft .E is revolved in the direction indicated by the black arrow. It will thus be perceived that by mea-ns of the `spindles l and the rollersi 'in n, I am enabled,` as may be required, to rei volve the tappet-shaft in either direction, or to allow it to remain at rest while the other g motions of the loom continue.

It is evident that no contingency, carelessness, or accident can bring thevtwo pawls simultaneously in contact with their ratchetwheels, for, should the connection y, or any l. ot the parts immediately above it, give way, f the pawl S/falls upon its ratchet-wheel, and the other pawl falls with it, or should either i of the connections m, t, or r, he broken, no i further breakage or injury could result from the accident. v

In the arrangement represented in Fig. 1, I for the purpose of transmitting the motion of the ratchet-wheels to the cam K, it will be E perceived that the shuttle-boxes are raised i with a smallV expenditure of power compared g with what is required to revolve the cam G,

'd' ej". Owing, however, to the steepness of the ascent between the rests d andy", much more friction will result from the arrangement of parts than where the cani K is employed. The particular arrangement of parts above f described possesses several advan tages,among which may be enumerated the following: But

l a single pattern-chain is used to operate both the ratchet-wheels; but one connection, and

that a simple rod or vertical bar, is required between the pattern-chain and the pawls S S', while the pawls are so connected together that under no circumstances can the two be brought simultaneously into contact with their ratchet` wheels, and thus all risk ot' breakage from any accidents to the parts in connection with the pawls is avoided. And I consider this arrangement the best mode. in which I have contemplated the application of my invention but it is obvious that the particular arrangement may be varied Without departing from the principle of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The' combination of the pattern-chain, the pawls, and the reversible tappet-shat't, or their equivalents, substantially as described.

2. The tappct-shaft, constructed and operating, substantially as herein described, to turn about its axis in either direction or remain at rest, as desired, for the purpose specified.

3. The reversible tappet-shaft, or its equivalent, in combination with the pawls or their equivalent, constructed and arranged substantially as described, and for the purpose specified.

p 1EDWARD W. BROWN.

Witnesses:

ELIAS M. JENcKEs, ARNOLD H. SmfrH.

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