US1695388A - Needle motion for axminster looms - Google Patents

Description

W. W. ROBERTSON NEEDLE MOTION FOR AXMINSTER LOOMS Filed June 15, 192'! 2 Sheets-Sheet l fizrm/ar I M/Am /m/zm Dem 18, 1928. v

' W. W. ROBERTSON NEEDLE MOTION FOR AXMINSTER' LOOIS 2 Shasta-Sheet 2 Filed June 13, 1927 Patented Dec. 18, 1928 more!) STATES PATENT OFFICE.

WILLIAM W. ROBERTSON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMP- TON & KNOVLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORA- rron or MASSACHUSETTS.

- NEEDLE MOTION FOR AXMINSTER LOOMS.

- Application filed. June 13,

This invention relates to needle motions for Axminster looms and it is the principal object of the invention to provide means for increasing the dwell of they needle when in the shed to allow more timefor the operation of the selvage shuttle.

In the usual Axminister loom there is employed long needle inserted from one side of the loom through the open shed, said needle carrying the fillingand having an eye in the advancing end thereof. A small shuttle on that side of the cloth oppositethe side from which the needle enters the shed is made to traverse the path of the eye of the needle when the latter has passed entirely through the shedso as to interlace the selvago thread with the filling.

in recent attempts to increase the speed of wide Axminster looms it has been found that the needle because of its weight and length vibrates sufficiently to interfere with f o perfect operation of the selvage shuttle.

is an important object of my present invention to provide a needle motion for a loom running at an. increased speed but win. ein the needle or the eye'ofv the needle is on a slight dwell to permit the passage of age shuttle so that the operation of r may he more certain.

. also found that the increase in the of an Axminsterloom results in strainparts which actuate the needle and another object of my invention to pro r. a means for. absorbing the sl1oclrincito the motion of a needle to theend the latter may get into motion'mo're lually than would otherwise be the case rout my present invention.

4 a morespecific object of my invention ivide an improved drive for the cable no of an Axminster needle motion in a collapsible connector is interposed. "i the Constantly drivingpart andthe s associated with the drum, said colle part permitting a continued movement on the part of the driving mechanism while-the needle is at rest to permit the operation of the selvage shuttle.

Nith these and otherobjects in view which will appear as the descriptionproceeds, my invention resides in the combination and arrangement of parts hereinafter described and forth in theolaims.

In the accompanying drawings, wherein I x 1927. Serial No. 198,393.

have shown a convenient embodiment of my invention, I I I I Fig. 1 is a side elevation of the right hand end of an Axminster loom shuttle motion showing the needle motion with my improvements applied thereto, I II Fig. 2 is a vertical section on line 22 of 1 Fig. 3 is a fragmentary horizontal section on line 3 3 of Fig. 1,

Fig. at is a top plan new of the selvage" shuttle and operating parts taken in the direction of arrow a, Fig. 1,

Fig. 5 is a detailed view on an enlarged scale showing the collapsible portion of the connection between the regularly moving driving part and the actuating segment, parts being in section, and I Fi 6 is a view of the portion of mechanism shown in Fig. 1 but with the parts in a different position. I r 1 Referringto'the drawings it will be seen that I have provided an end frame 10 which may project fromthe ri ht hand end of the loom and have journa ed therein a constantly rotating shaft 11 carrying a crank arm 12. Said shaft 11 may be driven in any approved manner forming no part of my invention and may have either a uniform or avariablemovement. A segment 18is pivoted at 14: to the frame and has teeth 15 which mesh with the pinion 16 moving with a drum 17 Said drum actuates a cable or rope 18 which moves around fixed guide sheave 19 and movable guide sheave 20.

.In order to take up slack iii-cable 18 I provide a lever 21 having'one end weighted as at 22 and the other end provided with a' bearing 23 for the movable guide, sheave 20.

A. hold pawl 24: .ispivoted to the framerlO at 25 and cooperates with a segmental ratchet 26 to hold said lever 21 in any of its adjusted positions. The lever '21 will move the sheave 20 to the right when sufficient slack in the rope 18 permits of such; movement, and the pawl 24 will engage :theteeth 0fthe ratchet 26 to preventretrograde move-v ment. i I

A needle block 27 is secured to the cable and slides on a 'guide28 to directmovement of the needle 29 as the latter reciprocates in a horizontal'line into and out of the warp shed. .As the crank arm 12 moves in the direction. or arrow A the segment, pinion and drum will act to move the needle'back and forth so that the weft W may be in serted in the fabric.

011 that side of the cloth opposite the needle motion is the usual selvage shuttle motion comprising a stand through which extends an upright oscillating shaft 31 to which is secured an actuator arm 32. The selvage shuttle 33 moves in an arcuate guide slot 34 formed in a stand 35 and a mouth 36 is provided for receiving the eye end of the needle 29. The latter may be positioned against upward movement by a guard 37 moving with the arm 32 and a pad or block 38 held on the stand 30 may position the needle to prevent the same from being too low. I do not consider the guard and block necessary but they have been found in practice to assist in the placing of the needle when wide Axminster looms operate at high speed.

An arm 39 fast with the upright oscillating shaft 31 is attached to a connector 40 which receives reciprocatin movements from mechanism not shown, tlie reciprocation of said rod 10 requiring the shuttle 33 to move back and forth in the arcuate slot 34 so that the nose of the shuttle will pass through a reduced part a1 of the needle 29 andthrough the loop in the fillin The thread S which extends from the selvage to the shuttle in this way holds the weft W as the needle returns to the right hand side of the loom. The matter thus far described is of common construction and forms no part of my present invention and may be constructed and operated as well understood by those skilled in the art. The slack taking up device of which lever 21 is a part is not necessarily employed and my invention is not confined to the use of any particular form of shuttle motion for the selvage thread.

As previously stated my invention has as an important object the provision of means for causing a dwell in the eye of the needle to allow more time for the passage of the selvage shuttle. The particular means for accomplishing this result as shown herein includes an improved form of connector between the arm 12 on the driving shaft 11 and the segment 13. Accordingly, I pivot the connector to the crank arm 12 and provide said connector with a cross head 52 having portions extending on either side of the central line of the connector. in each end of the cross head I secure bolts 53 which extend through a bearing member 5 1- hav ing pivotal connection with a stud '55 fast on the segment 13. Heavy compression springs 56 surround the bolts 58 and lie between the cross head 52 and the bearing 5 1. A tongue 57 projects from the cross head and has an end adapted for engagement with a part of the bearing 54. 7

An abutment 60ihaving a block 61 is secured to the frame 10 and may have a shock absorbing face formed of leather or other movement the parts will be in the full line position shown in Fig. 6 with the crank arm moving in the direction. of arrow A. As the arm 12 moves upwardly the connector 50 w ill start to move inwardly gradually and the springs 56 will transmit the thrust of the connector 50 to the bearing 54- and the latter in turn will tend to move the segment 13 about the pivot 14:. If the drum and other parts of the needle moving mechanism are slow in getting into motion due to their weight the springs 56 will compress slightly as the arm 12 continues to move about its center and if the parts have not gotten into motion by the time the tongue 57 engages the bearing 5 1 these two parts will establish direct connection between the arm 12 and the segment 13 so as to cause the needle moving parts to move at the correct speed.

After the parts have been set in motion and the segment has moved to the left from the position shown in Fig. 6 the end of the rack or toothed part 15 will engage the abutment 50 when the crank arm 12 and the connector 50 are in some such a position as that indicated in light dotted lines in Fig. 1. The segment is brought to rest when the needle is properly positioned and the selvage shuttle 33 may therefore begin its movement along the. slot 3 1 to' lay the selvage thread through the loop of the filling Vi. The needle will continue to remain at rest while the arm 12 moves from the position in light dotted lines to that shown in full lines and will remain at rest until the arm and connector reach the position shown in heavy dotted lines in Fig. 1. During this movement the springs 56 are compressed, said springs providing means whereby the crank arm 12 can continue to move while the needle remains at rest.

By referring to Fig. 1 it will be seen that the needle will be at rest while the. crank arm is passing through a comparatively large part of its angular movement around shaft 11. The length of time permissible for the flight of the shuttle 33 is of course determined by the length of dwell of the needle or needle eye. I find with the use of the device set forth herein that the shut tle can move at a comparatively slow rate of speed so that when the looms to which the invention are applied are speeded up to run at a considerablyit'aster rate the shu tle motions can move practically at their original speed so as to insure proper movement thereofwithout the danger of misthreading or breaking either the filling or selvage warp.

lit;

From the foregoing it will be seen that I have provided means for producing a dwell in the motion of the needleeye, this result being accomplished by a form of connection between the driving shaft of the needle motion and the segment, the connection yielding to cause or permit a dwell in the movement of the needle. This connection also tends to absorb the shock which usually results when the needle motion is required to operate at .an increased rate.

Having thus described my, invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a needle motion for Axminster looms having a selvage shuttle, a'c'onstantly moving driving mechanism, operating mechanism tor the needle, a stop for said operating mechanism, and a motion absorbing connection between the driving mechanism and the operating mechanism, said operating mechanism being brought into engagement with the stop during a portion of the move ment of. the constantly moving driving mechanism, said connection absorbing motion from the driving mechanism as tne latter continues to move and the needle operating mechanism remains substantially at rest.

2. In a needle motion for Axminster looms having a selvage shuttle, a regularly moving driving mechanism, operating mechanism for the needle, a fixed stop to be engaged by a part of the operating mechanism, and a yielding connection between the driving mechanism and the operating mechanism to move said operating mechanism. against tie stop as the driving mechanism moves and to yield as the driving mechanism continues to move whiletheoperating mechanism ar rested by the stop.

. In a needle motion for Axminster looms having a seivage shuttle, a regularlymoving member, operating mechanism for the needle including an oscillating segment, a stop for the segment, and a yielding connector between the regularly moving meniber and the segment to yield under normal operating conditions as the regularly moving member continues to move while the segment is in contact with the stop to produce a dwell in the motion ofthe needle.

4. In a needle motion for Axminster looms having a selvage shuttle, a drivingmember having a regular movement in a rotary path, operating mechanism for the'needle including a segment to oscillate, a stop for the segment, a connector between the driving member and the segment, and yielding means forming part of the connector and interposed between the segment and the member to yield during the regular movement of'the needle motion while the member continues to move in its rotary path when the stop is in, engagement with the segment.

5. In a needle motion for Axminster looms having a selvage shuttle, regularly moving driving mechanism, operating mechanism for the needle, a yielding connection between the driving and operating mechanisms, and fined means to cause a. periodic yielding of said connection during the normal operation of the loom to cause a dwell in the move ment of the needle and the operating mechanism therefor as the driving mechanism continues to move. 7 V V 6. In a needle motion -for Axminster looms having a selvage shuttle, a regularly moving driving mechanism, operating mechanism to move the needle, and yielding means to transmit the movement'ot the driving mechanism to the operating mechanism, said yielding means being compressed during the normal operation of the loom to cause a dwell in the movement of the needle and the operating mechanism therefor as the driving mechanism continues to move. I

7. In an Axminster loom having a selvage shuttle, a wel't laying needle, a regularly moving driving mechanism, operating connections operatively connecting theneedle and the driving mechanism at all times, said connections including a yielding element and means'to arrest movement of the needle during the normal operation of the loom and. cause yielding of the connections as the driving mechanism continues to move.

8. In an Axminster loom having a selvage shuttle, a weft laying needle, a regularly moving driving mechanism, operating mechanism for the needle, a yielding connection to communicate driving power to the needle j operating mechanism and interposed between the operating and driving mechanisms, and

means to limit movement of the needle on its weft laying stroke during the normal operation or the loom, said means causing a yielding of. the connections as the driving mechanism continues tomove.

9. .In an Axminster loom having a selvage shuttle, a weft laying needle having an eye on one end through which the weft extends,

regularly moving driving mechanism, ojper ating connections including a yielding mem ing the normal operation of the loom to hold the eye 01? the needle and the operating connections therefor fixed with respect to the her to communicate driving power to the: needle operatingmechanism, and means to cause a regular yielding of said member dur- Axminster looms having a selvage shuttle, a regularly moving driving shaft having a needle-inserting movement, operating mechanism for needle,

the needle including a fixed pinion and a segment meshing therewith, a yicldable connection between the shaft and the operating n'echanism for the needle, and means to arrest movement of the needle and the operating mechanism therefor prior to completion of the needle inserting movement of the shaft and during the last part of the needle inserting movement 0:5 the shalt.

11. in a needle motion for Arminster looms having a selvage shuttle, a constantly moving driver for said needle, operating connections for the needle, motion absorbing means including two relatively movable co-acting elements interposed between the driver and the operating connections, and means to hold one of the elements of the motion absorbing means stationary during a portion of the movement of the driver, whereby a part only of the movement of the driver is communicated to the needle.

12. In a needle motion for Arminster looms, a needle to be reciprocatcd, an oscillatable segment operatively connected to the a regularly moving driving men: or, a ionnector interposed between the driver and segment to communicate motion from the driving member to the segii'icnt, and yieldable means forming part oi": the connector to absorb motion or the driver when the motion of the segment is arrested.

13. In a needle motion-for .anminf looms, a needle to be rcciprocated, an oscillatable segment operatively connected to the needle. a regularly moving driving member, a connector interposed between the driver and segment to communicate motion from the driving member to the segment, yieldable means "forming part oi the connector to absorb motion of the driver when the motion of the segment, arrested, and a stop to engage the segment to arrest motion thereof.

14.111 a needle motion for Amninster looms, a needle to be reciprocated, an oscillat able segment operatively connected to the needle, a regularly moving driving member, a connector interposed between the driver and segment to communicate motion from the driving member to the segment, and

yieldable means forming part of the con neck) to absorb motion of; the Lll'lVl' when the nliotion or" the so rent arr= ted, said connector having provision for hinitin tive movement of the segment and the driving member in the direction in which the yielding means permits rel..t1ve movement or": the driver and se ment.

15.111 a needle motion for lllznninster looms, a needle to be reciprocated, an oscillatable segment operatively connected to the needle, a regularly moving driving member, a connector interposed between the driver and segment to communicate motion from the driving member to the segment, and yicldable means forming part of the con nector to'absorb motion of the driver when the motion of the segment is arrested, said connector having a tongue to be operatively related to the segment to limit movement of the segment toward the driver.

16. an a needle motion for Axminster looms, an oscillatable segment, a regularly moving driver, a connector interposed operatively between the driver and the segment, a bearing carried by the segment and having sliding contact with portion of the connector, and yielding means interposed between the connector and the bearing.

17. In a needle motion for Axminster looms, an oscillatable segment, a regularly moving driver, a connector interposed operatively between the driver and the segment, a bearing carried by the segment and having sliding contact with a portion of the connector, yielding means interposed between the connector and the bearing, and a tongue carried by the connector to engage the bearing to limit movement of the segment toward the driver. I

18. In a needle motion for Axminstcr looms, an oscillatable segment, a regularly moving driver, a connector interposed operatively between the driver and the segment, a. l caring carried by the segment and having sliding contact with a portion of the connector, yielding means interposed between the connector and the bearing, and means between the bearing and connector to limit relative movement of said bearing and connector when the yielding means permits relative movement of the segment and the driver. r

19. in a needle motion for an AXminster loom, a driving member movable through a given interval of time, a needle, a movable segment and 1 red pinion device operatively connected to the needle, said needle and device being movable through a correspondingly shorter interval of time, and motion absorbing mechanism interposed operatively between the device and the member to absorb motion from the member while the lattor moves after the expiration of the time interval of the needle and device.

In testimony whereof I have hereunto afs fixed my signature.

.WILLIAM lV. ROBERTSON.

Images