US1091432A - Self-threading shuttle for looms for weaving. - Google Patents

Description

D. M. HOLLINS.

' SELF THREADING SHUTTLE FOR LOOMS FOR WEAVING.

APPLICATION FILED MAY 20, 1911.

1,091,432. Patented Mar. 24, 1914.

TINTTED STATES PATENT OFFICE.

DENIS MACHELL HOLLINS, OF BLACKBURN, ENGLAND, ASSIGNOR TO DRAPER COM- PANY, OF IIOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

SEIE-THBEADING SHUTTLE FOR LOOMS FOR WEAVING.

Specification of Letters Patent.

Application filed May 20, 1911.

To oZZ whom it may concern:

Be it known that I, Dnms MAGHELL Hon LINS, a subject of King George V of Great Britain, residing at Blackburn, in count-y of Lancaster, England, have invented certain new and useful Improvements in Self- Threading Shuttles for Looms for Veaving, of which the following is a specification.

This invention relates to self-threading shuttles for looms, and has for its object the provision of simple and eflicient means for preventing or reducing to a minimum the wear on certain parts of the shuttle due to the friction of the yarn passing thereover.

In self-threading shuttles for automatic looms, and it is to these that my invention particularly relates, there is provided a metal block or threading device suitably designed to automatically assume control of the thread as the shuttle is thrown across the loom, and first cause its introduction into a longitudinal thread passage and thence by means of a horn, as it is termed, through an entrance slot into a laterally extending or side delivery eye. It is usual to provide a shuttle of this type with steel pins, one at each side of the outer end of the delivery eye, for the purpose of resisting the Wear of the thread on the wood of the shuttle and for the same purpose, at the inner end of the delivery eye, the threading device has been provided with a steel guide pin or prong around which the thread draws when its direction is changed to cause it to pass from the longitudinal thread passage to the delivery eye. Then using such shuttles with certain classes of yarn, more especially woolen or worsted or other coarse yarns, it has been found that the eye pins and the guide pin or prong referred to wear very rapidly, so that in a short time thev become so cut and scored as to render the shuttle useless. There have been other attempts to overcome the difliculty, one de vice for the purpose being shown and de-- scribed in the specification of British Patent No. 11412 of 1906, according to which there was placed in a recess formed in the shuttle at the inner end of the delivery eye, a block of porcelain, glass, or other similar vitreous material having an upturned guide prong and upright abutments to present an eye and slot to register with the slotted delivery eye and cause the wear of the thread to be transferred from the wood to such wear resisting block.

According to my present improvements, I dispense with the use of a steel guide prong and wear pins as in the prior patent referred to, and I also employ vitreous wear resisting surfaces, which however are formed and applied in a novel manner and are simpler and better adapted for coarse yarns than the previous construction.

In describing my invention, I shall refer to the accompanying drawings, in which Figure l is a plan view of part of a shuttle, the threading device of which embodies my improvements; Fig. 2 is a side elevation looking in the direction of the arrow A, Fig. 1, and Fig. 3 is a transverse section taken as on the line B-B, Fig. 2, looking in the direction of the arrow C, same figure.

Referring to the drawings, 1 represents the shuttle, 2 the bobbin recess therein, and 3 the threading device which may be of any well known suitable construction and in the instance shown comprises a metal block having a longitudinal thread passage 5 therein into which the thread first passes and from whence it is guided by a horn 6 through an entrance slot 7 into the laterally extending side delivery eye 8, in the usual and well known manner.

According to my present invention, I form along one side of the delivery eye 8, a lateral undercut recess 8 in which is secured by cement or the like, a block 9 of porcelain, glass, or similar material having a smooth, glazed, and very hard surface, vitreous in character, and possessed of suflicient toughness to withstand the blows to which the shuttle is subjected. The block may be further secured in position by means of a pin 10 driven vertically into the wood of the shuttle and engaging in a vertical notch or recess in the back of the block, as will be understood by an examination of Figs. 1 and 2. The block 9 forms one side of the delivery eye 8 and is suitably curved along its'inner face as at 9 and at its outer end 9 to guide the yarn with a minimum of friction. The inner end 9" of the block, which is also suitably curved or rounded ott', projects beyond the inner end of the delivery eye 8 into the longitudinal thread passage 5 of the threading device, and terminates at or substantially at the longitudinal axis of the shuttle, the end 9 of the block thus occupying the position usually occupied by the steel guide pin or post in the ordinary constructions of shuttles of this type.

The wall of the longitudinal thread passage 5 is provided or formed with an inwardly extending inclined or curved shield or cover 5 which extends immediately above and beyond the inwardly projecting end 9 of the block 9, and guides the thread, as the latter is drawn into the thread passage on the shuttle being thrown across the loom, into proper position around the said end 9 of the block. As the thread is drawn off, therefore, it draws around the curved inner end 9 of the block 9 into the delivery eye 8, along the hollowed out or curved face 9, and passes out of the delivery eye 8 around the curved outer end 9 of the block. The opposite side of the delivery eye 8 is formed with an undercut recess 8 in which is secured, by cement or the like, a block 11 of porcelain or similar vitreous wear resisting material having its inner face suitably curved or hollowed out and its ends suitably curved to guide the thread, when the shuttle is thrown in the opposite direction, from the curved inner end 9 of the block 9 to the outer end of the delivery eye 8.

The block 11 may, if desired, be further secured in position by a vertical pin in the same manner as has already been described with reference to the block 9.

The shape of the blocks 9 and ll and of the shield or cover 5 in the thread passage 5 may be varied according to the particular construction of shuttle and threading device or to suit requirements.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a self-threading shuttle for looms, the combination of a shuttle body and a threading device having a longitudinal thread passage, of a non-metallic guide block extending transversely of the shuttle body and having its inner end extending into the longitudinal thread passage and beyond the wall thereof to form a non-metallic guide for the thread in its travel from the bobbin, and a shield or cover extending into the thread passage beyond the end of the nonmetallic guide block to guide the thread over the end of the guide block as the shuttle is threaded and to a position below the edge of the shield or cover that the thread may normally bear only on the non-metallic guide block as it is drawn from the shuttle during weaving.

2. In a self-threading shuttle for looms, the combination of a shuttle body and a threading device having a longitudinal thread passage, of a non-metallic guide block extending transversely of the shuttle body and having its inner end extending into the longitudinal thread passage and beyond the wall thereof to form a nonmetallic guide for the thread in its travel from the bobbin, and a shield or cover extending into the thread passage beyond the end of the non-metallic guide block to uide the thread over the end of the guide block as the shuttle is threaded and to a position below the edge of the shield or cover that the thread may normally bear only on the non-metallic guide block as it is drawn from the shuttle during weaving, the outer end portion of said non-metallic block having a rounded surface forming one wall of the delivery eye, and a non-metallic block forming the opposite wall of the delivery eye.

3. In a self-threading shuttle for looms, the combination of a threading block having sage, and a Vitreous thread guide disposed transversely of the threading block and having its inner end extending into the longitudinal thread passage and beyond the adj acent wall thereof, and a shield projecting downward from a point above the inner portion of the vitreous guide and having a lower edge portion extending into the longitudinal thread passage above the lower portion of the thread guide and normally above and out of contact with the thread leading from the bobbin, said vitreous guide forming one side wall of the delivery eye and a separate vitreous block forming the opposite side wall of said eye.

a longitudinally extending thread pas- 4:. A shuttle having a delivery eye and a self-threading device providing a longitudinal thread-passage, a vitreous thread guide having its inner end projecting into the longitudinal thread passage to engage the thread as it is drawn from the bobbin and furnishing the guiding means for the thread as it moves from the longitudinal passage to the delivery eye, and a shield extending transversely from one side of the longitudinal thread passage and having its lower edge portion in the thread passage opposite to and crossing the inner end of the vitreous thread guide above the normal position of the thread.

5. A self-threading shuttle for looms, having a threading device provided with a longitudinal thread passage, and an undercut laterally extending recess, a vitreous block having a rounded end projecting beyond the wall of the laterally extending recess into the longitudinal passage to afford a non-metallic guide for the thread in its travel from the bobbin, and having also an open face portion directed toward the end of the shuttle, and an outer rounded portion at the delivery eye, and a shield extending into the longitudinal thread passage to guide the thread to said vitreous block as the shuttle is threaded, the edge of said guide being normally above and out of contact with the thread as it is drawn from the bobbin during weaving.

6. A shuttle having a self threading de vice providing a longitudinal thread passage, a vitreous thread guide extending transversely of the shuttle with its inner end beyond the adjacent wall of and extended into the longitudinal passage and having an open bearing portion facing toward the end of the shuttle, a shield extending clownward into the longitudinal thread passage from above and extending beyond the inner end of the vitreous thread guide, the lower 15 edge of said shield crossing the inner end of said Vitreous guide in the longitudinal thread passage above the thread after the shuttle has been threaded.

In, testimony whereof I aifix my signa- 20 ture in the presence of two witnesses.

DENIS MAOHELL HOLLINS.

WVitnesses:

ERNALD SIMPSON MOSELEY, MALCOLM SMETHURST.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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