US747310A - Warp-evening mechanism for looms. - Google Patents

Description

' PATENTED DEC. 15, 1903;

E.- S. WOOD. WARP EVENING MECHANISM FOR LOOMS.

APPLICATION FILED JUNE 22. 1903.

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No. 747,310. PATENTED DEC. 15, 1903.

E. s. WOOD. r WARP EVENING MECHANISM FOR LOOMS.

I APPLICATION FILED JUNE 22. 1903. .H0 MODEL. 7 I SHEETS-SHEET 2.

UNITED STATES i atented December 15, 1903. PATENT OFFICE.

EVERETT S. WOOD, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP-EVENING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 747,310, dated December 15, 1903.

Application filed June 22, 1903.

To all whom it may concern.- I

Be it known that I, EVERETT S. W001), a

citizen of the United States, and a resident of out No. 732,885, dated July 3, 1903-it is possible for the detector-heddles to jump higher thanis necessary as they rise with the upward movement of theharness-frame to movethe warps controlled thereby into the upper plane of the shed. As a matter of fact it is usual for such jumping to occur, and it is due to the fact that the longitudinal slots in the heddles are longer than the cross-bar of the frame extended therethrough, and this bar consequentlycannot preventthejumping,for, as is well known to those skilled in the art, the lower edge of the cross-bar is well above the bottoms of the heddle-slots when the harness-frame has reached its highest point. There are two objections in practice which result from this jumping of the heddles: First, it brings extra and entirely unnecessary and undesirable strain on the warps, causing them to rise above the upper plane of the shed second, when the separator shown in the patent referred to is employed it sometimes happens' that the warps in the upper plane of the shed are carried up by the j umping heddles between or against separators cooperating with the heddles controlling the warps in the lower plane of the shed. This often strains, frays, or cuts the warps in the upper plane,causing unnecessary warp breakage. In explanation of this action it may be stated that when a harness-frame descends the resistance of the warps acts upon the beddles in such a manner that they and the separators are pressed or crowded together at their upper ends. When the other harness-frame Serial No. 162,468. (No modelJ ascends, the jumping of the heddles carries the warps up high enough to pull or tend to pull some of the warps between the crowded heddles of the frame which is down, andsuch warps are caught or pinched and held up. Consequently when the next change of shed occurs the caught warps are pulled down by their own heddles and lifted up by the pinching heddles or heddles'and'separators of the other frame, and if the warps cannot stand the strain necessary to release them they break. In any event the warps are improperly strained and rubbed or frayed, and the action described is one of the principal causes of warp breakage. V v

' In accordance with my present invention I provide a stop or guard-which is extended transversely above the warps adjacent the harness-frames and so located that it acts to limit the upward movement of the warps when raised to the upper plane of the shed and'prevents them from being lifted above such plane by the jumping tendency of the heddles. As the warps are limited in their upward movement, it follows that the jumping cannot occur, and consequently the warps cannot be caught or pinched, as hereinbefore mentioned, and warp breakage from such cause is eliminated. I may alsoprovide the stop or guard with pin-like projections,which extend'longitudinallyof the warps and which cooperate with the detector-heddles of one or more of the harness-frames of a set, acting as- 75 separators to preventlateral displacement of the heddles.

The novel features of my invention willbe fully described in the subjoined specification,

and particularly pointed out in the following 3 the line 3 3, Fig. 1, also looking toward the right. Fig. 4 is a like View, but showing the warp stop or guardprovided with means to separatev the he'ddles of one of the harnessframes. Fig. is a perspective detail, enlarged, of a part of the stop or guard shown in Fig. 4; and Fig. 6 is an enlarged perspective view of one of the top separators shown in Figs. 1 to 3.

I have herein shown a plain or two-harness set, each harness-frame comprising two upright side bars b, connected at their lower ends by a bottom cross-bar b and near their upper ends by two parallel supports or crossbars a a, the frames being connected by links I) with a top motion T, Fig. 1, and forming no part of my invention, the bottom bars b being connected in any suitable manner with treadles. (Not shown.)

In Figs. 2, 3, and 4 the harness-frames are indicated as a whole by the reference-letters H and H, each being shown as provided with two banks or series of warp-stop-motion-controlling detectors d 01', respectively, which serve also also as heddles and made as thin flat metal strips or plates, each having a warp-eye 2 and a longitudinal slot near the upper end, all substantially as in the patent referred to, the bars a and a being loosely extended through the slots 20 of the heddles. An upright transverse plate B is extended between the lower ends of the banks of heddles carried by the harness-frames and connected by bracket-like arms B with the loom sides, (see Fig. 1,) two oppositely-moving feelersf f, mounted on a normally rocking shaft g cooperating with a released detector-heddle to efiect stoppage of the loom automatically, all in well-known manner.

In Figs. 1, 2, and 3 I have shown separators s for the detector-heddles for one bank of each harnessframe, said separators being mounted on the bars a a, respectively, and being shown as alternating with the heddles, one of the separators, which is 'made of thin fiat sheet metal, being shown separately in Fig. 6, and having a slot 3 for the bar and overturned longitudinal edges 8 all substantially as shown in the patent referred to and operating as therein set forth. It is to be understood, however, that the particular arrangement of the separators may be changed, and the shape thereof may be varied, so far as my present invention is concerned, without departing therefrom.

In Figs. land 2 front and back warp-rests w and w are shown extended across the loom in front of and behind the front and back harness-frames, respectively, below the warps and sustained by stands 10, secured to arms B of the brackets 13'. In the present embodiment of my invention the two front stands 10 have upturned extensions 15 of suflicient length to project somewhat above the warps when in the upper plane of the shed, and to these extensions is secured a stop or guard, shown as a bar or rod M, extended across the warps and located between the harnessframes. The extensions 15 are vertically slotted at 16 to receive the bolts 18 by which the stop M is held in place, and by means of such connection the stop may be adjusted vertically. Referring to Fig. 3, in which the front harness-frame is raised, it will be seen that the stop M is just above the warps W in the upper plane of the shed,and it will be manifest that said stop acts to limit or prevent any further upward movement of any of said warps due to jumping of their heddles. The warps in the upper plane of the shed are thus evened, and they cannot be subjected to additional and unnecessary tension from jumping heddles. Manifestly when the back frame H is raised to place the warps W in the upper plane of the shed the stop M will act thereupon as has been described and will prevent them from being carried above such plane. Were it not for the stop, the jump of the heddles of either harness-frame would tend to lift their warps into contact with the separators s of the other frame, as will be manifest from an inspection of Fig. 3, such contact often operating to cut, fray, or otherwise strain the warps caught and pinched between the heddles pressed or crowded together in the manner described. I prefer to place the stop between the two frames, as thereby the most effective action appears to be attained, though my invention is not restricted thereto.

Sometimes the stop may be provided'with projections, such as pins 'm (see Figs. 4 and 5,) extended in the direction of the length of the warps and long enough to cooperate with the detector-handles of one of the harthem and prevent their lateral swaying displacement. In Fig. 4 the stop M is I vided with suchpins, as m and the re shown as arranged to act as separat -or the heddles of the back harness-fra being unnecessary as a general thinghio use pins for each frame, and while no top separators are shown in said figure it is to be understood that they may be used, if desired.

For the reasons stated in the patent referred to it will be preferable, probably in the majority of cases, to employ top separators, as is shown in Figs. 1, 2, and 3.

My invention is not restricted to the precise construction and arrangement herein shown and described, as the same may be modified or varied without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a loom, reciprocating harness-frames each provided with detector-heddles having limited longitudinal movement relative to their frames, and a stationarystop extended transversely above the warps adjacent the harness-frames, to stop jumping up of the detector-heddles and limit upward movement of the warps raised to the upper plane of the shed.

2. In a loom, reciprocating harness-frames each provided with a cross-bar,longitudinallyslotted detector-heddles suspended from the cross-bars and having limited longitudinal movement relative thereto, and a stationary stop extended transversely above the warps in close proximity to the harness-frames, to prevent jumping of the warps above the up per plane of the shed when raised thereto.

3. In a loom, reciprocating harness-frames each provided with detector-he'ddles having limited longitudinal movement relative to their frames, and a stationary stop extended transversely above the warps between two ad'- jacent harness-frames, to prevent further upward movement of the detector-heddles which carry the warps when raised to the upper plane ofthe shed.

4. In a loom, reciprocating harness-frames each provided 'with detector-heddles having limited longitudinal movement relative to their frames, a rod extended between two adjacent harness-frames above the warps,to prevent lifting of the warps above the upper plane of the shed when raised thereto,and vertically-adjustable means-to support said rod.

5. In a loom, two oppositely-reciprocating harness-frames each provided with a crossthe warp between the frames, to form a stopfor the warp-threads raised to the upper plane of the shed and prevent them from being raised above such plane.

6. In a loom, two oppositely-reciprocating harness-frames each providedwith a crossbar,a series oflongitudinally slotted detectorheddles strung thereon and having limited longitudinal movement relative thereto, .a transverse stop extended above the warps between the frames,and separating-pins extended from the stop longitudinally of the warps, to extend between the heddles of one of the frames and prevent lateral displacement thereof.

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

EVERETT S. WOOD. Witnesses: 1

CLARE H. DRAPER, FRANK J. DUTCHER.

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