US373151A - Harness-board for jacquard looms - Google Patents

Description

(No Model.)

W. G. NORTHUP.

. HARNESS BOARD FOR JAGQUARD LOOMS. No. 373,151. Patented Nov. 15,1887.

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UNITED STATES PAT NT OFFICE.

WILLIAM G. NORTHUP, OF MINNEAPOLIS, MINNESOTA.

HARNESS-BOARD FOR JACQUARD LOOMS.

SPECIFICATION forming part of Letters Patent No. 373,151, dated November 15, 1887.

Application filed March 21, 1887. Serial No. 231,626. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM G. NORTHUP, acitizen of the United States, and a resident of Minneapolis, county of Hennepin, and State of Minnesota, have invented a certain new and useful Improvement in Harness-Boards for. Jacquard Looms, of which the following is a specification, reference being had to the-ac companying drawings.

In the Jacquard loom there is used a contrivance which is known to thetrade under the various names of harness-board, compart-board, or combenboard, the purpose or function of which is to guide the independent threads of the harness each to its respective warp-thread. In the form generally used this thread-guide has been composed simply of a thin narrow wooden board of a-length equal to the width of the loom and provided with a series of thread-holes arranged in parallel series transversely of the board. This construction is defective. It lacks adjustability, is not durable, and breaks the harnessthreads. A new board has to be substituted with every change in the reed. The reed varies in number of splits to the inch, ranging from seven to thirty, or more, according to the number of warp-threads required for the various kinds of work. The harnessboard series of thread-guides must conform in spacing or number of series to the inch to the splits in the reed. To make a change, the threads must all be untied and withdrawn from the 01d board, inserted in the new, and retied. This is tedious and consumes much valuable time. The harnessthreads also quickly wear out the harness-board- Drawing, as the outside threads do, at an acute angle from the Jacquard head, they wear into the edges of the holes, and in a short time will entirely out out the wood intervening between two adjacent series of perforations. The wood also wears out the-threads, rubbing, roughening, and breaking them. The threads will catch on the sharp edges of the wornchannels and break, especially with changes in the dryness or moisture of the threads and the wood. Individua'l threads are therefore constantly breaking, and attention is all the time required to keep them in repair. The same board can only be used for a comparatively short time, even for the same kind of work.

' guide for Jacquard harness, as is illustrated in the accompanying drawings, and hereinafter fully described and particularly claimed.

In the drawings, like letters referring to like parts throughout, Figure 1 is a plan view of a portion of a harness-board constructed in accordance with my invention. Fig. 2 is a cross-section of the same, showing a side elevation of one of the glass pieces containing a series of thread-guides. Fig. 3 is a crosssection of one of the glass pieces through the diameter of one of the thread-guides. Fig. 4 is a plan, and Fig. 5 an end view, of a modification; and Fig. 6 is aplan, and Fig. 7 a crosssection, of another modification of the threadguide.

A A are the top and side bars of the threadguide frame. Taken together with the end cross-pieces (not shown) and the tie-bolts D, they make up my harness-board frame. The vertical side plates, A, are cut away, as shown at a, on their interior faces, forming continuous shoulders or seats for the glass threadguides. The top or cap plates, A, are detachably connected, by set-screws or otherwise, to the side pieces, A',with one edge overlapping the ends of the thread-guides.

D is a draw-bolt which serves to hold the side rails, A, from springing apart and to clamp the threadguides firmly in their proper position.

- B is apiece of molded or pressed glass, about one-fourth of an inch thick, one-half to fiveeighths inch in depth, and some live or six.

inches in length. On one face of this glass piece B are av series of vertical semicircular grooves, b, of which there should be as many as are ever required for the largest single transverse series of Jacquard harness-threads. 1' preferably make mine of twelve.

O is a removable backing or filling, which may be of any suitable material-as thin strips of card-board or woodcut of like length and width with the glass pieces. Of these any suitable number are used between each adjacent pair of glass pieces B as may be required to adjust the thread-guides in conformity with ICO any given reed. The grooves b are cut deeper into the glass at the bottom than they are at the top, as shown in Fig. 8.

In the modification shown in Figs. 6 and 7, I make the glass piece F exactly like the piece B of Figs. 1, 2, and 3, except that I cut it away on the lower half, confining the grooves fto the upper half of the glass piece. In the form shown in Fig. 4 the glass piece is made of two pieces, each of which is in cross-section a truncated pyramid, and each of which is provided on one face with a series of similarly spaced and sized parallel grooves. These pieces are placed together, the base of one to the top of the other, all the parts corresponding and coinciding, and the two half-grooves, one half from each piece E and E, together make a circular perforation, e, as shown. This gives an opening which is perfectly exact and true.

I make my glass pieces in one or the other of these ways, because it is the only practicable plan of obtaining a smooth groove or perforation through or in a glass body. These glass pieces should be thin enough to conform in number to the inch, when set in the harnessboard frame, to the finest reed. The adjustment to the coarser reeds is then only a matter of putting in additional strips of the removable filling or backing 0. Care should also be taken to have these glass pieces eX-aclly straight-edged and of exactly equal length. A series of these glass pieces B are set edgewise on the seats a, adjacent to each other, or with filling, G, between the same. The top plate, A, is then screwed fast to the side bars, A. The draw-bolts D (of which there should be several) are tightened, clamping the glass pieces tightly in their respective positions, and the harness-board is ready to receive the harness-threads. This once done, both the harness-board and the harness-thread last indefinitely. The threads have no wearing effect whatever on the glass and the glass has no perceptible wearing or roughening effect on the threads; or at most the wearing effect is reduced to a minimum, and there is no catching of the threads, and hence no breakage whatever. The longitudinal adjustment to make the harness-board conform to a change of reeds is readily effected by taking out part or all of the filling, G, and pushing the glass pieces 13 nearer together, or pushing them apart and inserting more stripsof filling, and the transverse adjustment is effected by simply using more or less of the grooves b, as required. This is all done without untying or taking out the harness-th reads, and thus a great saving of time is made. I have had the form of thread-guide shown in Figs. 1, 2, and 3 in continuous use for several months and find that it works most admirably, conclusively establishing all the foregoing statements as positive facts.

IVhat Iclaim,and desire to secure by Letters Patent of the United States, is as follows 1. A harness-board for Jacquard looms, having a series of independent glass sections,each provided with a single series of grooves or thread-guides, and spacing means for adjusting them to different positions in respect to each other, substantially as described.

2. A harness-board for Jacquard looms,having a series of independent glass sections provided with vertical grooves, which serve as thread'guides, and removable backings between them, substantially as described.

3. The combination, with a harness-board frame, of a series of independent glass threadguides, each provided with a single series of WILLIAM G. NORTHUP.

In presence of- EMMA F. ELMORE, J. F. WILLIAMSON.

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