US2017945A - Yielding reed - Google Patents

Description

0a; 22, 1935. Q D, BROWN 2,017,945

YIELDING REED Filed Nov. 2, 1934 2 Sheets-Sheet l as o 1 E3 i (\1 O O w 0 N 1* (l to r E 8 N (u W/T/VEJS. INVENTOR.

CAEL 0. BEQW/V.

ATTORNEY.

Q/A'ToNJI (cave/v.

Oct. 22, 1935. c, D, BROWN 2,017,945

YIELDING REED Filed Nov. 2, 1954 2 Sheets- Sheet 2 W/ TNEJJ INVENTOR.

CAEL- 0. SHOW/v,

ATTORNEY.

Patented Oct. 22, 1935 UNITED STATES PATENT OFFECE YIELDING REED Carl D. Brown, Hopedale, Mass., assignor to Draper Corporation, Hopedale, Mass a corporation of Maine The present invention pertains to looms and has more particular reference to the reed controlling instrumentalities of the yielding reed type of loom.

In looms of the type mentioned, the reed is mounted on the lay so as to be capable of relative rearward movement. The reed is normally held in its forwardmost position but is capable of yielding rearwardly at the time of beat-up, to thereby compensate for variations in the successive picks of filling. The spring means which control the reed at the time of beat-up are usually not sufficiently strong to prevent the reed from yielding during the time the shuttle is in flight. In some types of looms, the shuttle cannot be properly controlled unless the reed and shuttle box are accurately aligned during the picking and boxing of the shuttle. Accordingly, a yielding of the reed at such times is most objectionable.

It has been proposed to support the yielding reed, while the shuttle is in flight, by supplementary spring devices. However. such devices are objectionable in that springs are inherently incapable of holding the reed with sufficient flrmness .unless the springs are objectionably heavy. Some such prior devices are further objectionable in that the springs must be stretched or compressed a considerable distance each pick of the loom with the result that the springs break and must be replaced frequently.

Accordingly, it is an object oi the present invention to provide, in a yielding reed loom, positive locking means for the reed and positive means for moving the locking means to locking position as the lay moves rearwardly and from locking position as the lay moves forwardly.

Other objects will be hereinafter more specifically enumerated or will become apparent as the description proceeds.

The preferred embodiment of the present invention is illustrated on the accompanying drawings, of which:

Fig. 1 is a sectional view of the loom with the lay at front center;

Fig. 2 is a view similar to Fig. l but with the lay well back;

Fig. 3 is a rear elevation showing the right hand part of the reed mechanism, this view being to a larger scale than Figs. 1 and 2; and

Fig. 4 is a sectional view, taken approximately on line 4--4 of Fig. 3.

The loom to which my invention has been applied is but fragmentarily illustrated on the drawings, there being shown only one side of the reed mechanism (it being understood that the mechanism shown is duplicated at the other side of the loom) and certain contiguous parts. The loom frame includes loom sides, of which the right hand loom side l is shown, and which 5 are connected by cross members including a breast beam 2.

The lay 3 is mounted on lay swords, as 4, for reciprocation toward and from the front of the loom in the usual manner. A conventional reed 1o 5 is mounted so as to normally move with the lay but to yield rearwardly at the time of heatup, as is usual in yielding reed looms. The reed is conveniently rendered capable of rearward movement by mounting it in a reed structure it; which is pivoted on studs, as 6, in brackets, as I, carried by the lay swords.

The reed structure shown includes a hand rail 8 bolted at each end to aside lever 9. The lever 9 is fulcrumed on the stud 6 and extends downno wardly therefrom. A lower reed holding bar Ill and warp supporting bar H are fastened together as by bolts I2 and each end of this assembly is fixed to and supported by the lower end of a lever 9, as by means of a bolt IS. The 35 reed is supported between the hand rail and the bar It) and is thus mounted to move rearwardly by pivoting with the reed structure about the axis of stud 6.

The reed structure and reed may be yieldingso ly held forwardly by any suitable means. There is shown, for this purpose, a series oi bolts I4 extending through the lay and upturned at Hi to engage back of the reed structure, the bolts being urged forwardly by springs l6 positioned beas tween the lay and the nuts threaded onto the bolts. The limit of forward movement of the reed may be adjustably determined by the heads of stop bolts, as 11, Fig. 4.

The mechanism as thus far described would (.0 not only permit the reed to yield at the time oi. beat-up but would also permit such yielding when the lay is back and the shuttle in flight. It is with means for preventing this latter yielding that the present invention is concerned.

It will be noted that the bracket 1 is fixed with respect to the lay and that a part l8 thereof projects downwardly and rearwardly to a point well back of the lay. A locking member 1 9 is movably mounted on the'part I8, as by being pivoted on a 50 stud 20 therein. This stud is preferably of the eccentric type, for adjusting the position of the locking member. The locking member occupies the position as shown by Figs. 1 and 3 only during the actual beat-up, (which is while the lay is Iii at and near front center). At such time, the locking member is entirely free of the reed structure and has no effect on the yielding of the reed. However, the locking member can be moved so that it extends between the part I8 and the reed frame and positively locks the reed against yielding, as shown by Fig. 2. Preferably, the locking member is provided with a cam surface 2 I eccen trlc of stud 20, which surface engages a projection 22 on lever 9 of the reed structure.

The member I9 is moved to and from locking position in synchronism with the movement of the lay, being moved to locking position as the lay moves rearwardly and from such position as the lay approaches the limit of its forward movement. The means disclosed for moving the locking member is positive in action and may consist simply of a link 23 pivoted at its lower end on a fixed pivot 24 and at its upper end to the locking member 19. The pivot 24 may be carried by a bracket 25 fixed to the loom side. The pivot is positioned to the rear of the rock shaft 26 and will therefore cause the link to swing the locking member upwardly and downwardly as the lay reciprocates. The link 23 shown on the drawings is threaded so as to be adjustable for varying the time of locking and unlocking the reed.

Having iully disclosed the preferred embodiment of my invention, I claim:

1. In a loom, a reciprocating lay, a spring-controlled reed structure and reed mounted on the lay to yield rearwardly at the time of beat-up, a stand fixed with respect to the lay, a locking member pivoted on said stand and engaging said said member toward andfrom said reed structure, and means for pivoting said member about said stud out of locking position as the lay approaches the limit of its forward movement.

2. In a loom, a reciprocating lay, a reed structrolled reed structure and reed mounted on the lay to yield rearwardly at the time of beat-up, a stand fixed with respect to the lay, a cam member pivoted to said stand at a point horizontally rearwardly of said reed structure, said member being movable on said pivot to and from position where it engages behind said reed structure and locks the same against rearward yielding, and a link pivoted at one end on a fixed pivot and at its other end to said cam member, said link moving said cam member to said locking position as the lay moves rearwardly and away from said position as the lay approaches the limit of its forward movement.

4. In a loom, a reciprocating lay, a reed structure and reed pivoted with respect to the lay above the cloth, spring means yieldingly resisting rearward pivoting of said structure at the end of beat-up, a stand projecting rearwardly from the lay, a locking cam pivoted on said stand at a point horizontally rearwardly of said reed structure for movement to and from position where it engages said reed structure and positively locks the same against rearward movement, and a link pivoted at one end on a fixed pivot and at its other end to said cam for swinging the latter to locking position as the lay moves rearwardly and from locking position as the lay approaches the limit of its forward movement.

CARL D. BROWN.

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