US1930240A - Loom - Google Patents

Description

J. KEYS Oct. 10, 1933.

Loon

Filed Feb. 2. 1932 2 Sheets-Sheet 1 INVENTOR 1 6 BY F7 Z Oct. 10, 1933. J. KEYS ,9 40

Filed Feb. 2, 1932 2 Sheets-Sheet; 2.

INVENTOR MAJ -1 ATTORNEYS Patented Oct. 10, 1933 PATENT OFFICE LOOM Jeremiah Keys, Philadelphia, Pa., assignor to Alva. Carpet & Rug Company, a corporation of Pennsylvania Application February 2, 1932. Serial No. 590,359

8 Claims.

This invention relates to looms of the type particularly adapted for carrying on a method of weaving such as is described in United States Patent No. 1,795,770, granted March. 10, 1931, to

.5 August G. Fromuth, wherein pile-forming warp threads for a given length of the fabric aresupplied fromone beam and whereinthe pile warp threads for the next succeeding part of the fabric are supplied from a second beam, the warp threads of the second beam being held out of operation and their ends clamped and anchored during such time as the weaving is being carried on with respect to the first beam and the pile warp threads of the first beam. being held out of operation with their ends clamped and anchored during such time as the weaving operation is carried on with respect to the second beam.

Important objects of the present invention are to enable the loom operator to observe the weaving operation at'the fell of the cloth with unobstructed vision; to facilitate the change from active to inactive warp threads, and to maintain the inactive warp threads taut under all operating conditions of the loom. To these ends the invention contemplates a simple and otherwise satisfactory clamp-supporting and warp-threadtensioning means for supporting the ends of the inactive warpthreads on the lay of the loom and for maintaining the inactive warp threads taut,

' 3 which means includes suitable brackets adapted active warp threads taut, and are yet weak enough to so yield as to permit the bearing arms, together with the tension roller, to move downwardly under the tension of the inactive warp threads as the lay moves forward.

Other objects and advantages of the invention will become apparent from the following description taken in connection with the accompanying drawings, in which- Fig. 1 is a view, in end elevation, of a loom embodying this invention;

Fig. 2 is a sectional view taken on line 2 2 of Fig. 4 and showing in part the clamp-supporting and thread-tensioning means associated withthe lay of the loom;

Fig. 3 is an enlarged fragmental view showing in perspective a latch-device for temporarily holding thetension roller together with its associated bearing arms in a depressed position to facilitate removal of thefthread clamp from its supports; I

Fig.4 is an enlarged plan view of the clampsupporting and thread-tensioning means;

Fig. 5 is an end view of the clamp-supporting and thread-tensioning means as viewed from the left in Figsl and 2. In Figs. 4 and'5 only inactive warp threads are shown.

The loom, in association. with which the clampsupporting and .warp-thread-tensioning means embodying this invention are-herein illustrated, comprises a frame 5, including an arch beam 6 and a breast beam 7. The loom further comprises a lay 8, which isconstructed and operated, as usual, in front of. a plurality of heddle units 9, 10, 11, 12 and 13, the first two of which are adapted to control, respectively, sets of pile- 7. forming warp threads 14 and 15, supplied from beams 16 and 17, and the next two of which are adapted to control binder threads 18 and 19 supplied from a beam 20, and the last of which is adapted to control wadding or stuffing threads 21 supplied from a beam 22. 'The heddle units 9 to 13, inclusive, and the heddle-actuating mechanism 24 are such as the shown in my patent application Serial No. 489,871, filed October 20, 1930, allowed September 13, 1931, the heddle-actuating mechanism being so connected to the heddles 11, 12 and 13 that they are at all times under the influence of such actuating mechanism and are operated thereby in a properly timed relation, and the heddles 9 and 10 being adapted for selective operation, depending upon whether the weaving operation is to be carried out with respect to the pile-forming warp threads 14 or 15. During such time as the weaving operation is being carried out with respect to the pileforming warp threads 14, the heddle unit 9 controlling such threads is raised and lowered by the heddle-actuating mechanism 24 and the heddle unit 10, which is adapted'toco'ntrol the warp threads 15, is held up out of operation, as by a 0 suitable link or hanger 25 carried bythe arch beam 6 and adapted for detachable connection with the upper portion of the frame of that heddle unit.

While the heddle unit 10, together with the set 105 of warp threads 15 controlled thereby, is out of operation, such threads are held in a fixed longitudinal relation to each other and are anchored to the lay 8 of the loom by a plurality of suitable clamps 26, of the type shown, described and 1 claimed in my copending application Serial No. 489,872, filed August 20, 1930.

The above-mentioned clamps, according to the present invention, are removably supported on the lay of the loom by clamp-supporting means, which includes a pair of end brackets 27 and an intermediate bracket 28, the brackets 27 being attached to the reed head 30 adjacent opposite ends of the lay, and the bracket 28 being attached to such head intermediate the ends thereof. Each of these brackets is formed at its forward end' with a U-shaped hanger 31, at the entrance to which is provided an overhanging lip 32, preferably formed integral with-its associated bracket, the front end of which lip is spaced from the forward leg of the hanger a sufficient distance to permit the clamp to be introduced into the hanger and removed therefrom. The function of the over-hanging lips 32, as will be readily appreciated from Fig. 2, is to so engage the threadcl'amps 26, when they are supported by the hangers 31, as to prevent their being accidentally displaced under the tension of the inactive warp threads, especially during the forward movement of the lay 8. As will appear from Figs.4 and 5, the hanger 31,of the intermediate bracket 28, is substantially identical with the hangers of the end brackets 27, except for the fact that it is somewhat wider so as to readily accommodate the adjacent ends of the two thread-clamps 26.

Depending from the intermediate bracket 28 and each of the end brackets 27, is a roller-supporting'arm' 34, in which is journalled a guide shown as a guide-roller 35, which extends from one end of the lay 8 to the other end thereof and under which pass the inactive warp threads, either those indicated by the numeral 14 or those indicated by the numeral 15, depending, of course, upon which of these sets of warp threads is employed in the weaving operation; or, conversely, depending upon which of these sets of warp threads is out of operation and is held by the clamps 26 on the lay of the loom. v

From the description thus far, it will be appreciated that as the lay of the loom recedes, the inactive warp threads that are supported thereby tend to become slack. In order, therefore, to take up such slack, there is provided warp-threadtensioning means, which comprises a tension-supplying idle-warp-thread support shown as a pair of tension rollers 36, removably journalled in bearing arms 37, 37, and 38, 38, the former of which are secured to a shaft 40, and the latter of which are secured to a shaft 41. The shaft 40 is journalled in suitable bearings 42 and 44, carried, respectively, by the intermediate bracket 28 and one of the end brackets 27, and the'shaft 41 is journalled in similar bearings 45 and 46 carried, respectively, by the intermediate bracket 28 and the other end bracket 27. The bearing arms 37, 37, and 38, 38, are urged upwardly about the axis of therespective shafts 40 and 41 by suitable springs 47, secured to the intermediate bracket 28 and adapted to engage the adjacent'bearing arms 37 and 38 at points forward of and offcenter with respect to a vertical plane passing through the axis of the shafts 40 and 41 to which the bearing arms 37, 37, and 38, 38 are, respectively, secured. Because of the fact that the bearing arms 37, 37, and 38, 38, are rigidly connected to the shafts 40 and 41, respectively, it follows that but a single spring need be employed in association with these respective pairs of bearmg arms to normally urge them upwardly together with; the respectively associated tension rollers 36 over which the idle warp threads pass.

From the foregoing, particular reference being had to Fig. 2, it will be readily appreciated that as the lay of the loom moves forwardly, the bearing arms 37, 37, and 38, 38, together with their associated tension rollers 36, move downwardly, under the tension of the inactive warp threads, from the dotted line positions shown in that figure to the full line positions shown therein, and that as the lay of the loom recedes the spring 47'will move the bearing arms and the tension rollers from their full line positions to their dotted line positions, with the result that the inactive warp threads are maintained taut under all conditions of operation of the lay of the loom.

When it is desired to remove the clamps 26 from the hangers 31, the lay of the loom is brought to rest in its receded position, whereupon the respective pairs of bearing arms 37, 37, and 38, 38, are moved down manually to a position somewhat below the full line position of such arms, indicated in Fig. 2, whereupon a suitable latch-device 48(there being one such latch-device for each pair of bearing arms) is automatically brought into operation to hold the bearing arms, 1 together withthe associated tension rollers, in their respective depressed positions. Each of these latch-devices includes a trigger or dog 50, pivotally connected to a pair of upstanding lugs P or ears 51, preferably formed integral with the 1 intermediate bracket 28, the trigger 50 being provided at its lower end with an extension or arm 52, beneath which is suitably held a compression spring 54, which normally urges the trigger for- I wardly, the forward. movement of such trigger 1 being limited by a stop-pin carried thereby and adapted to engage a shoulder or lug 56 formed integral with one of the upstanding lugs or ears 51. The trigger 50 is formed with an 7 inclined or cam surface 57, with which a latch- 1 pin 58, there being one such pin for each of the adjacent bearing arms 37 and 38, is adapted to engage when the bearing arms 37, 37, and 38, 38, are manually moved downwardly beyond the Y lowermost position that they assume, as indi- 1 cated in full lines in Fig. 2, during the operation of the loom. Upon engagement of the pins 58 with the inclined or cam surfaces 57 of the trigger 50, such triggers are moved rearwardly, I against the action of the springs 54, until such 1 time as these latch pins move beyond the inclined or cam surfaces of the triggers, whereupon the springs 54 snap the triggers into latching position with respect to the latch pins, thus tem- I porarily locking the bearing arms, together with 1 their associated tension rollers, in depressed po- 'sitions. By the depression of the tension rollers as just described, the idle warp threads are slackened, thus permitting the clamps 26 to be readily removed from the hangers 31. After re- 1 moving the clamps, the tension rollers 36 may be easily lifted from their bearings in the bearing arms 37, 37, and 38, 38, to permit the clamps to be so placed on the surface of the cloth adjacent the fell thereof as to enable the clamped 1 warp threads to be introduced into the fabric after placing the heddle unit controlling such threads in operation and after rendering inoperative the heddle unit controlling the warp threads with respect to which the immediately preceding duced into the bearings of the bearing arms 37,

3'7, and 38, 38, after which the clamps are placed in the hangers 31, as shown in Fig. 2, the bearing arms being then released from their depressed positions, by moving the latches rearwardly through the aid of their associated levers or handles 60, so that the tension rollers may be moved upwardly under the action of the springs 47 which engage the bearing arms, thus conditioning the warp-thread-tensioning means for use in the Weaving operation that is to be carried out with respect to the now active warp threads.

Although only one form of the invention is herein shown and described, it will be understood that various changes may be made without departing from the spirit of the invention or the scope of the following claims.

What is claimed is:

1. In a loom, clamping means for attaching the free ends of idle warp threads to the lay of the loom, and tension means for maintaining the idle warp threads taut during the forward and backward movements of the lay, said tension means comprising a tension-supplying idle-warp-thread support interposed between the clamping means and the idle-warp-thread beam and carried by the lay and moving therewith and exposed for access from the front of the lay.

2.'In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and adapted to receive and removably support said clamp, and tension means for maintaining the idle warp threads taut during the forward and backward movements of the lay comprising a tension-supplying idle-warp-thread support interposed between the clamping means and the idle-warp-thread beam and carried by the lay and moving therewith and exposed for access from the front of the lay.

3. In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and adapted to receive and removably support said clamp, tension means for maintaining the idle warp threads taut during the forward and backward movements of the lay comprising a pair of bearing arms pivoted to said lay, a tension-supplying idle-warp-thread support carried by said bearing arms and adapted to engage said idle warp threads intermediate said clamp and said idle-warp-thread beam, and

I spring means co-acting with said bearing arms for moving said arms, together with their associated idle-warp-thread support, as the lay retreats, and for permitting said arms, together with said supports, to move in an opposite direction as the lay of the loom moves forward whereby said idle warp threads are maintained taut under all conditions of operation of the lay of the loom.

4. In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and adapted to receive and removably support said clamp, tension means for'maintaining the idle warp threads taut during the forward and backward movements of the lay comprising a pair of bearing arms pivoted to said lay, a tension-1'. supplying idle-warp-thread' support carried by said bearing arms and adapted to engage said idle warp threads intermediate said clamp and'said idle-warp-thred beam, spring means co-acting with said bearing arms for moving said arms, to-

idle-warp-thread beam, spring means co-acting gether with their associated idle-warp-thread support, as the lay retreats, and for permitting said arms, together with said supports, to move in an opposite direction as the lay of the loom moves forward whereby said idle warp threads are maintained taut under all conditions of operation of the lay of the loom, and a latch-device for retaining said bearing arms, together with their associated tension-supplying idle-warp-thread supports, in depressed positions.

5. In a loom, clamping means for attaching the free ends of idle warp threads to the lay of the loom, tension means for maintaining the idle warp threads taut during the forward and backward movements of the lay, said tension means comprising a tension-supplying idle-warp-thread support carried by the lay and interposed between said clamping means and the idle-warp-thread beam, and a guide beneath which the idle warp threads are adapted to pass, said guide being carried by the lay and disposed intermediate said tension-supplying idle-warp-thread support and said idle-warp-thread beam.

' 6. In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and adapted to receive and removably support said clamp, tension means for maintaining the idle warp threads taut during the forward and backward movements of the lay comprising a tensionsupplying idle-warp-thread support carried by said lay and exposed at the front thereof and interposed between said clamping means and the idle-warp-thread beam, and a guide beneath which the idle warp threads are adapted to pass, said guide being carried by the lay and disposed intermediate said tension-supplying idle-warpthread support and said idle-warp-thread beam.

7. In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and provided with hangers located at the front of the lay and adapted to receive and removably support said clamp, a pair of bearing arms pivotally connected to said bracket, spring means urging said bearing arms upwardly about their points of pivotal connection with said bracket; and tension-supplying idle-warp-thread support removably journalled in the free ends of said bearing arms, over which said idle warp threads pass at a point intermediate said clamp and the idlewarp-thread beam, and a guide carried by said brackets and disposed intermediate said tensionsupplying idle-warp-thread support and said idle-warp-thread beam, under which guide said idle warp threads pass.

8. In a loom, means for attaching the free ends of idle warp threads to the lay of the loom comprising a clamp, brackets carried by said lay and provided with hangers located at the front of the lay and adapted to receive and removably support said clamp, a pair of bearing arms pivotally connected to said bracket, spring means urging said bearing arms upwardly about their points of pivotal connection with said bracket, tensionesupplying idle-warp-thread support removably 'journalled in the free ends of said bearing arms,

intermediate said tension-supplying thread beam, under which guide said idle warp threads pass, and means for automatically locking said bearing arms, together with their associated tension-supplying idle-warp-thread support, in

depressed positions to facilitate introduction of said-clamp into said hangers and to facilitate its removal therefrom.

' JEREMIAH KEYS.

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