US817144A - Selvage stop-motion for looms. - Google Patents

Description

E. G. GUSTAFSON da H. G. OLS SELVAGB STOP MOTION FOR LOOMS. APPLICATION FILED AUG, 4, 1905.

l PTNT ERNEST Cr. GUSTAFSON AND HJ ALMAR G. OLSSON, OF NORTH GROSVENOR DALE, CONNECTICUT, ASSIGNORS TO DRAPER COMPANY, OF HOPE- DALE, MASSACHUSETTS, A CORPORATION OF MAINE.

Specification of Letters Patent.

Patented April 3, 1906.

Application filed August 4, 1905. Serial No. 272,634.

T0 all whom it may con/cerro' Be it known that we, ERNEST G. GUsrAF- soN and I-IJALMAR G. OLssoN, citizens of the United States, and residents of North Grosvener Dale, county of Windham, State of Connecticut, have invented an Improvement in Selvage Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to selvage-motions for looms wherein the reciprocating and oppositelymovable selvage harness members each include one or more heddles for the selvage warps and a carrier to sustain the heddle or heddles, release of a heddle, as by breakage or exhaustion of its warp-thread, causing the heddle to act as a detector and engage and arrest a feeler, the latter thereupon effecting the operation of a loom-stopping instrumentality. One example of this form of selvage-motion is shown in United States patent to Draper, No. 729,046, dated May 26, 1903, and our present invention is illustrated in connection with apparatus such as is shown in said patent. The heddle-carriers are made as elongated rigid bars which are slidable at their lower ends in fixed guides and are connected at their upper ends by a flexible overhead connection. In practice this connection sometimes breaks, and when a weaver is tending a large number of looms the fault in the selvage-motion may not be noticed until considerable bad cloth has been woven, resulting in loss in production and diminution in the weavers pay.

Our present invention has for its object the production of means whereby the breakage ofthe overhead connection between the heddle-carriers will act through one of the carriers to effect the operation of the stopping instrumentality. As aresult the loom is stopped before any faulty cloth can be woven.

Figure l is a transverse sectional view of a portion of a loom, showing a selvage-motion of the character referred to with our invention applied thereto; and Fig. 2 is an enlarged perspective detail of the guide through which the lower ends of the reciprocating heddlecarriers are slidably extended.

It will be understood that two oppositelymovable vertically reciprocating harness members for the selvage-warps are arranged` at each side of the main shed-forming mechanism, and in Fig. 1 the salvage harness members for only one shed are shown, the main harness members being omitted altogether.

The front harness member or heddle-carrier is shown as an elongated rigid metal bar m, having a forwardly-projecting offset at its upper portion and a lateral projection fmL on the inner side of the carrier, onto which projection are strung the desired number of detector-heddles m2X for the selvage-warps. (See dotted lines, Fig. l.) These heddles serve as warp-stop-motion-controlling detectors and are longitudinally slotted to have a limited vertical movement relative to the carrier, as in the patent referred to, and in practice operate as therein described. The back selvage harness member is also shown as an elongated bar or carrier n, having at its upper end a rearwardly-extended offset n and a lateral heddle-support a4 for the back set of selvage-heddles nix. (Shown in dotted lines, Fig. l.) A flexible band or strap 35 is connected at its ends with the upper ends of the two carriers m and n and passes over a rotatable sheave 36, mounted in a bracket 37 of the arch AX, constituting an overhead flexible connection between the carriers.

A guide-block g2 (shown separately in Fig. 2) is mounted on the usual separator A10 at each end thereof, and parallel upright slots or guideways g g in each block slid ably receive the lower ends ofthe two carriers of the adjacent pair.

In order that the carriers may slide freely in the guideways, their lower ends are reduced in thickness, as at m3 n3, Fig. 1, and it will be seen that this reduced portion is made unusually long for a purpose to be described. Flexible bands or straps m nx are connected at their upper ends to the offsets m2 n2, respectively, and at their lower ends are connected with the actuating means (designated as a whole in Fig. -1 at A) which effects opposite vertical reciprocation of the heddlecarriers. This actuating means is not of our invention and may be such is shown in the patent hereinbefore referred to. Vibratable feelersff are mounted on rock-shaftsfx fX, geared together and operating in well-known manner, a released detector-heddle engaging and arresting a ieeler and effecting automat- IOO IOS

ically the actuation of a loom-stopping instrumentality.

If a selvage detector-heddle mZX of the front set is released, it drops and engages and arrests the feelerf, a released heddle H2X of the back set similarly cooperating with and arresting the feelerj".

IVe have made the reduced portions m3 and n3 of the heddle-carriers m and n so long that if the overhead connection between them breaks, as it sometimes will in practice, one of the carriers will descend or drop in its guideway in the block g2 far enough to coperate with and arrest a feeler just as a released heddle does to thereby effect the actuation of the stopping instrumentality and stop the loom before further damage can be done. Thus the heddle-carriers themselves are made effective to cause loom-stoppage when the overhead connection which sustains the carriers breaks or fails in any way.

While we have shown Our invention as embodied in one particular form of selvage-motion, principally for convenience and because such selvage-motion readily adapts itself to use in connection with our invention, the latter is not restricted thereto nor to the particular means shown for reciprocating the selvag'e harness members.

It will be manifest that-our invention is applicable to any selvage-motion in which the selvage-heddles are mounted on verticallyreciprocating carriers which can be made effective to cause loom-stoppage upon breakage of the overhead connection between each pair of carriers.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In a selvage-motion for looms, two reciprocating, oppositely-movable harness members each consisting of an elongated bar and one or more detector-heddles sustained by each bar and having a limited vertical movement relative thereto, a flexible overhead connection between said bars, means to reciprocate the harness members, and stop-motion-controlling feelers adapted to cooperate with a released heddle, or with one of said bars upon breakage of the overhead connection,

2. In a selvage-motion for looms, two reciprocating, oppositely-movable, elongated hedelle-carriers, an overhead connection between them, means to reciprocate the said carriers, One or more detector-heddles sustained by each carrier and having a limited vertical movement relative thereto, and means adapted to effect the operation of a stopping instrumentality by release of a heddle, or by breakage of the overhead connection between the carriers.

3. In a selvage-motion for looms, two reciprocating, oppo'sitely-movable, elongated heddle-carriers, an overhead connection between them, means to reciprocate the said carriers, one or more detector-heddles sustained by each carrier and having a limited vertical movement relative thereto, fixed guides through which the lower ends of the carriers are slidably extended, and vibrating stopmotion-controlling feelers adapted to coperate with and be arrested by a released detector, or with a carrier upon breakage ofV the overhead connection.

4. In a selvage-motion for looms, two vertically reciprocating and oppositely movable, elongated heddle carriers, a flexible overhead connection between them, a fixed guide for their lower ends, one or more detector-heddles sustained by each carrier and having a limited vertical movement relative thereto, and normally vibrating feelers adapted to effect the operation of a stopping instrumentality when engaged by a released heddle, or by the lower end of a carrier upon breakage of the overhead connection.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ERNEST G. GUSTAFSON. HJALMAR G. OLSSON.

Witnesses:

FRANK S. RICHMOND, ARTHUR JOHNSON.

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