US2808076A - Looms having automatic bobbinchanging mechanism - Google Patents

Description

Octl 1957' J. F. MOSELEY I-TAL 2,808,075

LOOMS HAVING AUTOMATIC BOBBIE-CHANGING MECHANISM I 2 Sheei-Sheet 1 Original FiledApril 23, 1951 F .2. I I 4 3M FREDERICK mesa-E) AND FRANK DA we:

J. F. MOSELEY EIAL 2,808,076 LOOMS HAVING AUTOMATIC BOBBIN-CHANGING MECHANISM Original Filed April 23, 1951 2 Sheets-Sheet 2 2,808,076 Patented Oct. 1, 1957 LOOMS HAVING AUTOMATIC BOBBIN- CHANGING MECHANISM John Frederick Moseley and Frank Davies, Didsbury, Manchester, England, assignors to The British Cotton Industry Research Association, Didsbury, Manchester, England, a British association Original application April 23, 1951, Serial No. 222,410,

, now Patent No. 2,681,666, dated June 22, 1954. Di-

vided and this application April 8, 1954, Serial No. 421,820

Claims priority, application Great Britain April 22, 1950 5 Claims. (Cl. 139-256) This invention relates to looms having automatic bobbin-changing mechanism and suction means for controlling of the two tail ends of yarn which are necessarily created at each bobbin-change and hereinafter termed the old end and new end respectively.

In the specification of our co-pending application for United States Patent Serial No. 222,410, which has matured into U. S. Patent Number 2,681,666, and of In the accompanying drawings:

Fig. l is a diagrammatic perspective view illustrating the bobbin-changing mechanism of a loom fitted with new end control and removal apparatus in accordance with the present invention, the parts being-shown in the position which they occupy immediately prior to bobbinchange and only so much of the loom and mechanism being illustrated as is necessary for understanding of the invention.

Fig. 2 corresponds to Fig. 1 except that the disposition of the several yarn-ends and of the operative parts is that which obtains during the actual changing of the bobbin in the shuttle.

Figs. 3 and 4 are similar views showing, respectively, the disposition of the yarn-ends and operative parts immediately after bobbin-change and during removal of the which the present application is a division, we have described and claimed improved apparatus for controlling and removing the old end, which leads from the cloth selvedge to the shuttle eye cutter and which requires to be severed before the old bobbin has been pressed from the shuttle by the new bobbin or substantially simultaneously therewith.

The new end is produced by the first pick of the shuttle with the new bobbin and extends from the selvedge to a holding device adjacent, and usually beyond, the

new en after its severing at the selvedge.

In the example illustrated, the magazine A and the mechanism for releasing in sequence the bobbins B manually stacked therein, as well as the mechanism for transferring successive bobbins to the shuttle C are of known construction.

The apparatus for controlling and removing the new ends includes an anchorage device D to which the yarnends E from the several bobbins B are taken by the operator, such device conveniently comprising a vertical coil spring attached to a fixed part of the loom and whose convolutions are in mutual contact'so as to grip the yarnends when the latter are drawn between them as shown.

Immediately adjacent this anchorage device D, and

between the latter and the magazine A, is arranged a pipe magazine, during the loading of which the operator engages the yarn-ends of the several bobbins with such device.

In one known arrangement, the holding device consists of a suction tube into which the operator allows the yarn-ends to be drawn as the bobbins are successively loaded into the magazine. Thus each new end. is held by suction only, although ithas been proposed to insert into the suction system a device in which the ends, as they are collected, tend to entangle with one another and are thereby more elfectively held. This, however, introduces the risk that entanglement of the yarn-ends may occur otherwise than at the designed position in the suction tube and thus interfere with the capacity of the latter to withdraw each new end immediately it has been cut at the selvedge. I

The object of the present'invention is an improved method of and means for controlling and removing'the new ends.

The present invention comprises the method of removing the new end wherein the yarn-ends from all the bobbins in the magazine are manually engaged by the operator with an anchorage device during loading of said bobbins into the magazine, and wherein the yarn extending from said anchorage device to any bobbin in position for immediate insertion into the shuttle is brought under the influence of a suction device so as to be tensioned thereby and so that, after transfer of the last-mentioned bobbin to the shuttle and after several picks have been inserted, the new end thus formed is cut at the selvedge and the free length of such new end is drawn into said suction device, and whereby the new end is anchored, as well as pneumatically tensioned, during the first pick and until so cut at the selvedge.

The invention also comprises apparatus for carrying out the method aforesaid.

F connected to suitable suction means which may also be associated with old end removal apparatus forming the subject of our co-pending application aforesaid.

An orifice G is formed in the top of the suction pipe F so as to lie directly beneath the yarn-end E leading to the anchorage device D from any bobbin B which is in position for immediate transference to the shuttle C; i. e. which has been allowed to descend into the lowest part of the magazine A and into the path of the transfer hammer H (see Fig. 1).

Under these conditions, the particular yarn-end aforesaid lies well within the sphere of influence of the suction orifice G, and preferably an upstanding V-shaped guide I is provided alongside the latter to ensure the optimum location of the yarn-end with reference thereto.

When the bobbin Bin question is transferred to the shuttle C by means of the hammer H (see Fig. 2) the suction at the orifice G takes up the slack which would otherwise occur in the yarn-end E, so that the latter is tensioned as well as positively held across the orifice G in the suction pipe F. v I r This pneumatic tensioning and positive holding of the yarn-end E is maintained during the first pick (see Fig. 3) and for several picks after bobbin-change has taken place until the yarn is severed at the selvedge by the cutter J, whereupon the major portion of the new end E thus formed is drawn into the suction pipe F through the orifice G as shown in Fig. 4.

At intervals, the operator can release the new ends E left attached to the anchorage device so that they disappear down the suction pipe F, or alternatively he may remove such ends manually.

By the means above described the previous need for entanglement of the new ends is obviated, and such ends are at all times so manipulated and controlled that they are never fouled by the operative parts of the loom or of the bobbin-transfer mechanism.

The apparatus above described is preferably used in combination with the old end control and removal means which forms the subject of our co-pending application aforesaid and parttof which is shown at K in the drawings.

What we claim is:

1. In a loom, in combination, magazine means for holding a supply of bobbins and for guiding the latter successively to a position for transfer into the shuttle; mechanical anchorage means spaced from said magazine means for mechanically gripping yarn-ends extending from the bobbins in the magazine means to the mechanical anchorage means, so that these yarn-ends extend through the space between the magazine means and anchorage means and so that when each bobbin is in said position its yarn ends extend along a given path; suction means located between saidv magazine means and anchorage means adjacent to said path for pneumatically tensioning the yarn-ends of the bobbins only when the latter are in said position, so that each yarn-end is mechanically gripped by the anchorage means and pneumatically tensioned by the suction means only during the period between the location of each bobbin in said position and the cutting of the new end thereof at the selvedge, said suction means having an inlet orifice; and guide means located adjacent said orifice for guiding each yarn-end to said orifice during movement of each bobbin from the magazine to the shuttle, said guide means including a plate formed with a substantially V-shaped notch extending into the same from an edge thereof and having its apex located closely adjacent to said orifice.

2. In a loom, in combination, magazine means for holding a supply of bobbins and for guiding the, latter successively, to a position for transfer into the shuttle; an elongated coil spring having its convolutions in engagement with each other; support means supporting said coil spring in a position spaced from said magazine means so that yarn-ends extending from the bobbins in said magazine means may be mechanicallygripped between the convolutions of said coil spring and so that when each bobbin is in said position its yarn-end extends along a given path; a suction conduit located between said magazine means and coil spring and formed with an inlet orifice located adjacent said path; and a plate located beside said conduit and formed with a substantially V-shaped notch directed toward said path and having its apex located closely adjacent to said orifice.

3. In a loom, in combination, magazine means for bolding a supply of bobbins, said magazine means including a magazine portion for holding a bobbin ready for transfer into the shuttle; and means for guiding each bobbin successively into said magazine portion; mechanical anchorage means spaced from said magazine means for mechanically gripping the yarn ends extending from all the bobbins in the magazine means to the anchorage means so that the yarn end of a bobbin located in said magazine portion extends along a given path, and the yarn ends of all otherbobbins extend along difierent paths spaced from said given path; and suction means having V t 4 I an orifice located between said magazine portion and said anchorage means adjacent to said given path for pneumatically tensioning only the yarn end of the bobbin located in said magazine portion during the period between the location of each bobbin in said magazine portion and the cutting of the new end thereof at the selvedge.

4. In a loom, in combination, magazine means for holding a supply of bobbins, saidtm'agazine means including a magazine portion for holding a bobbin ready for transfer into the shuttle, and means for guiding each bobbin successively into said magazine portion; mechanical anchorage means spaced from said magazine means for mechanically gripping the yarn ends extending from all the bobbins in the, magazine means to the anchorage means so that the yarn end of a bobbin located in said magazine portion extends along a given path, and the yarn ends of all other bobbins extend along different paths spaced from said given path; suction means having an orifice located between said magazine portion and said anchorage means adjacent to said given path for pneumatically tensioning only the yarn end of the bobbin located in said magazine portion during the period between the location of each bobbin in said magazine portion and the cutting of the new end thereof at the selvedge; and guide means located adjacent said orifice and adapted to be located in said given path for guiding the yarn ends of each bobbin during movement into said magazine portion.

5. A method for removing the new end of the yarn of a bobbin used with an automatic bobbin changing mechanism of a loom, comprising the steps of consecutively moving av plurality of bobbins to an operative position so that at any time a single bobbin is in said operative position; mechanically holding at a point spaced from said bobbins all yarn ends extending from said bobbins so that said yarns extend along different paths; applying suction to the yarn end of the bobbin in operative position for tensioning said last-mentioned yarn end; transferring said last-mentioned bobbin into the shuttle while maintaining suction; moving said bobbin through a plurality of picks while the yarn end of said bobbin is mechanically held and at the same time pneumatically tensioned; cutting said tensioned yarn end at the selvedge so that thecut-otf yarn end portion is subjected to suetion while being mechanically held; and releasing the mechanical hold of the cut-off yarn end portion so that the cut-off yarn end portion is sucked off.

References Cited in the tile of this patent UNITED STATES PATENTS 762,023 Brown June ,7, 1904 2,228,225 Brown Jan. 7, 1941 2,569,907 Turner Oct. 2, 1951 2,625,182 Beatrice Jan. 13, 1953 2,681,666 Moseley June 22, 1954

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