US3012588A - Weft yarn stop motion - Google Patents

Description

Dec. 12, 1961 Filed July 14, 1960 R. A. DUPRE WEFT YARN STOP MOTION 5 Sheets-Sheet 1 INVENTOR.

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Dec. 12, 1961 R, A, DUPRE wEFT YARN ySTOP MOTION 5 Sheets-Sheet 2 Filed July 14, 1960 INVENTOR. ROLAND A. DUPRE Maf fm ATTORNEYS Dec. 12, 1961 R. A. DUPRE 3,012,588

wEFT YARN s'roP Mo'rIoN Filed July 14, 1960 5 Sheets-Sheet 3 www@ FIGS

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i INVENTOR- ROLAND A. DUPRE BY -wwyw' ATTORNEYS Dec. 12, 1961 Filed July 14, 1960 R. IA. DUPRE WEFT YARN STOP MOTION 5 Sheets-Sheet 4 ATTORNEYS Dec. 1,2, 196.1 R. A. DUPRE 3,012,588

WEFT YARN STOP MoTIoN4 Filed July 14, 1960 5 Sheets-Sheet 5 INVENTOR. Y ROLAND A. DUPRE ATTO R N EYS United States Patent 3,012,588 WEFT YARN STOP MOTION Roland A. Dupre, Ashton, RJ. (27 Kent St., Cumberland, RJ.) Filed July 14, 1960, Ser. No. 42,867 3 Claims. (Cl. 139-371) This invention relates to an electrical stop motion for a narrow fabric loom and is utilized in conjunction with the stop motion shown in my `co-pending application, Serial No. 811,153, filed May 5, 1959, now U.S. Patent No. 2,984,265.

In the mounting of electrical contacts for the stopping of the loom, I have found that during certain vibrations of the loom that these contacts have engaged each other when free of the shuttle and caused stopping of the loom when the weft yarn supply in the shuttle was still operable.

One of the objects of this invention is to provide an arrangement so that the contacts cannot stop the loomv even though through vibration the contacts engage when the shuttle is not boxed but still allowing stopping when the weft yarn supply is in some way broken or exhausted.

Another object of the invention is to provide energization to the stop motion onlyat a time when the shuttles are boxed and under positive control. n

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

FIGURE 1 is a diagrammatic view illustrating a portion of a narrow fabric loom with certain wiring for a stop motion; l

FIGURE 2 is an elevation partly in section of a fragmental portion on a larger scale as shown in FIGURE 1;

FIGURE 3 is an elevation of two blocks with the shuttles therein and a fragmental portion of the lay upon which they are mounted;

FIGURE 4 is a perspective view, with a block and shuttle tipped down and in :an unnatural position, -illustrating the contact means for engaging contact plates on the shuttle for the electric circuit;

FIGURE 5 is a perspective view of the contact arm partly broken away whichv is mounted on the shuttle block;

FIGURE 6 is a perspective view of a fragmental portion of the loom frame and lay in beat-up position;

FIGURE 7 is an end view of the frame showing the contact mounted upon the loom frame;

FIGURE 8 is an end view of the frame showing a modified construction of the contact;

FIGURE 9 is a plan View of a fragmental portion of a loom showing a modified form of shuttle and modified form of contact means with the lay in the back center position to pass the shuttle through the shed;

FIGURE 10 is a view similar to FIGURE 9 but showing the lay in front center or beat-up position;

FIGURE 1l is a sectional View showing the relationship of the lay and frame in beat-up position of the structures of FIGURE 10; and

FIGURE l2 is a perspective view of the shuttle of FIGURES 9 and 10 illustrating the electrical contact means therefor and with parts of the shuttle omitted.

In proceeding with the invention, I have arranged to interrupt the electric circuit which is carried from the loom frame to the lay which mounts the shuttles except when the lay is in the front center or beat-up position and the shuttles are boxed. Thus, I have provided contacts on the frame and either on the lay beam or on the shuttle itself so that when the lay is in beat-up position, the contacts on the frame will be engaged and circuit will Referring to FIGURE 1 in more detail, 10 designates generally a narrow fabric loom, only that portion of which is shown as is believed necessary for an understanding of the present invention. The loom is of known manufacture and has a usual reciprocating lay 11 which carriesH a plurality of spaced shuttle blocks 12 in which the shuttles are boxed at the end of each throw thereof across the warps. Each block has the usual pair of guide tracks 13 and 13 for guiding the shuttle 14 from one shuttle block to the other. which warps are passed, is positioned in the space between shuttle blocks.

The shuttle blocks are similar to each other and are attached to the lay 11 in a known way. In FIGURES 1, 3 and 6 the guide tracks 13, 13' extend on the arc of a circle. The guide tracks 13 extend from one upper side edge of the block to the lower opposite side edge thereof, and the track 13' extends from the upper opposite side edge of the block to the lower opposite side edge thereof. The two tracks v13, 13 intersect each other centrally of the shuttle block. All the shuttles are moved or oscillated in unison back and forth between adjacent shuttle blocks. The shuttles will be moved from the track 13 of one block and into the track v13 of the next adjacent shuttle block. At the next throw or movement of the shuttle, the same will be moved from the tracks 13' to initial tracks 13. In the form shown in FIGURES 9 to 12 the shuttles move in avstraight line rather than in an arc. It may be here mentioned that during the oscillating of the shuttles, the warps are in a shedded relation and the shuttles pass through the shed and lay a weft across the warps to be interlaced therewith in a known way, the warps being shedded at each pass of the shuttles across the warps. The shuttles are oscillated back and forth by means of a gear wheel 16 mounted on each shuttle block for free rotation and are engaged by a reciprocating toothed rack bar indicated generally 17 (see FIGURE l). The shuttles are of known construction each having a body portion 18 and a guide groove 19 (see FIGURE 4) which interengages with the underout tracks 13, 13 of the shuttle block. Each shuttle is provided with a toothed segment 20 which is engaged by said gear wheel 16 and oscillated thereby from one shuttle block to the other.

The loom is provided with the usual shift bar which s an elongated bar 21 (FIGS. 1 and 2), which extends longitudinally of the loom and is manually operable to actuate the loom knock-off mechanism (not shown) to` bring the loom to rest or to actuate the mechanism to start the loom in operation. The knock-olf mechanism is operated through a linkage designated generally 22 which is supported on a bracket 23 attached to the frame 24 of the loom at one end thereof. The bar 21 is pivotally connected to said linkage as at 25 and is adapted to rock said linkage in one direction, when the bar is moved,y

towards the right as viewed in FIGURE l, to actuate the knock-off mechanism to start the loom in operation. To"A actuate the mechanism to 'stop the loom, the linkage 22 is rocked in the other direction by moving the bar '2.1

loom knock-0E mechanism. This comprises a suitable support 26 (see FIGURE 2) which is attached at one of its ends to the loom frame 24 at a location above the A so-called loom reed 15 throughl In the showing in FIGURES 9 and 10 the contacts occur at only alternate shuttle blocks contacts at each block position being unnecessary.

I claim:

1. In a weft yarn stop motion for a loom comprising a loom frame, a reciprocating lay, shuttle blocks carried by the lay with a groove for guiding the shuttles, shuttles in said grooves boxed in said blocks at each beat-up, electrically actuated means operable upon energization for stopping the loom and including an electric current conducting circuit, said circuit being responsive to failure of the weft yarn for closing the circuit, said electric circuit having a part in said frame and a part extending along said lay and connected to a plurality of shuttle blocks which engage the shuttles when therein, an independent contact carried by said frame and a cooperating independent contact carried by said lay, said contacts engaging only when beat-up of the lay occurs for closing the circuit of this location during beat-up while the shuttles are boxed.

6 2. In a weft yarn stop motion for a loom as in claim l wherein said contacts carried by the lay are carried by the lay beam.

3. In a weft yarn stop motion for a loomas in claim 1 wherein one of said contacts is resilient and yields upon engagement at beat-up of the lay.

References Cited in the le of this patent UNITED STATES PATENTS

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