Movable reed mechanism

April 16, 1935.

C. D. BROWN

MOVABLE REED MECHANISM

Filed Nov. 6, 1934

1,998,306

Sheets-Sheet 1

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ATTORNEY

April 16, 1935.

C. D. BROWN

MOVABLE REED MECHANISM

Filed Nov. 6, 1934

1.998,300

Sheets-Sheet 2

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<img file="US1998306A_D0003.tif" />

ATTORNEY.

Patented Apr. 16, 1935

1,998,306

UNITED STATES PATENT OFFICE

1,998,306

MOVABLE REED MECHANISM

Carl D. Brown, Hopedale, Mass., assignor to Draper Corporation; Hopedale, Mass., a corporation of Maine

Application November 6, 1934, Serial No. 751,737

Claims. (Cl. 139—188)

The present invention pertains to fly shuttle the movement of- the reed being controlled looms, and more particularly to the reed holding through a fitter which bears directly against the and controlling instrumentalities of such looms. lower-reed rib. A shaft extends lengthwise M

There exists in the prior art a reed mechanism, ” ’ ” commonly, called loose reed mechanism, -wherein the reed is positively locked to the lay during , the time the shuttle is normally in flight but is released at a predetermined point in each forward beat of the lay to allow the reed to yield rearwardly if the· shuttle- becomes trapped in the- shed. Such. reed mechanisms are usually found on automatic shuttle changing looms. The reed is movable by a very light pressure from a trapped shuttle at the so-called protection point, and the reed must be more firmly held during the beating in of the filling. The holding of the reed when the lay is at front center is usually aceomplished by a positive locking means.

A further well known type of reed mechanism 20 is the yielding reed mechanism (sometimes er- -------roneously called loose reed mechanism). Such in detail on -the accompanying drawings, of reed mechanism is constructed to provide for which: _·.·. _ ,. ..

a limited rearward yielding of the reed when- Fig. 1 is a perspective view, partly in section, the lay is at front center. The yielding of the from the back of the lay;

reed compensates for variations in the diameter Fig. 2 is a sectional elevation showing a trapped; 25 of successive picks of filling thread, tends to pre- shuttle; and.

vent thick and thin, places, and otherwise im- Fig. 3 is a view similar to Fig. 2 but showing-the _;proves the appearance of the cloth. Such media- parts in normal operative position.

nisms are usually found on non-automatic looms The loom which I have selected as best illus- and. bobbin changing looms particularly adapted trating an adaptation of the present invention 30 for weaving silk,:artificial silk or .very fine , cot- includes many parts or mechanisms which are ton.. old and well-known in the art. Accordingly,

The loose reed and yielding reed mechanisms of many such parts and mechanisms are not illusthe prior art have not been combined- in one trated on the drawings, while others are shown 35 loom and, so far as I am aware, prior to the as examples of constructions which may be 35

The loom, as shown, includes right - and left hand loom sides I and 2, respectively, which the lay therebeneath and is positively held from oscillating during the time the lay is at front 5 center and during the time the shuttle is normally in flight. The filter is supported from the shaft by connections which permit the filter, and reed, to yield slightly even when the shaft is locked. This slight yielding is opposed 10 by strong spring means and is preferably limited to the amount reasonably necessary to provide the- “yielding” reed function above mentioned. The positive stop means for the oscillatable, shaft free, the shaft at a predetermined point 15in each.forward beat of the lay, thereby allowing the shaft, connections, filter and reed to move the comparatively great distance necessary to accommodate a trapped shuttle.

The said: preferred embodiment is illustrated 20 present invention there has been no. single reed utilized.

mechanism specifically adapted to both loose reed The loom, as shown, includes right - and left and yielding reed functions. hand loom sides I and 2, respectively, which

It is, accordingly, an object of the present in- are.connected by cross-members including breast · • -- - :/: ‘ ’-----,. The loom is 40 controlled-through a-shipper handle 4 which is

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. vention to provide a reed controlling mechanism beam 3 at- the front of the loom, for movable reeds .which mechanism shall pro- centrelied thresh e.

vide for a slight yielding of the reed, at the .time movable -for operating controlling rods such as of beat-up and shall also provide for positively 5 and 6. -The shipper handle is pulled toward limiting such rearward movement during the the front of the loom, as in Fig. 3, when in run45 time the shuttle is normally in flight and for ning position-and is moved rearwardly, as in 45 releasing the reed at a predetermined point to Fig. 2, to stop the loom. A rod 1, slidably mountpermit the reed to move rearwardly a com- ed. ori-the . loom frame, may be moved forwardly paratively. greater distance if, at such time, the . by-devices-hereinafter described, such forward shuttle, is trapped in the shed. . movement serving to stop the loom in the man50- Other objects will be hereinafter more specifl- ner more fully disclosed in patent to Linds jo, 50.. cally enumerated, or will become apparent as et al., No. 1,850,306, granted March 22, 1932.

the. description proceeds.. A lay 8 is mounted on lay-swords 9, 9 for re-.

The preferred embodiment of the invention, ciprocation toward and from the front of the which is. herein disclosed, includes a reed- which loom in the usual manner. A reed 16 is mounted

..is pivotally mounted to pivot about its upper rib, on the lay so as* to normally move therewith but ³³

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2.

to be capable of rearward movement thereon at certain times. The particular reed shown is thus movable by virtue of the fact that its upper rib 11 is loosely mounted in a groove In the hand 5 rail 12 whereby the reed can pivot rearwardly about the rib 11. The reed is held forwardly against the lay by a suitable member such as filter 13 which is controlled as hereinafter described.

A shuttle 14 is picked along the lay and lays filling in the shed formed of warp W, the filling being laid in front of the reed and beaten in by the latter, all in the usual manner. The reed is capable of a rearward yielding movement at 15 the time of beat-up (that is, when the lay is at front center and the filling being beaten into the cloth) such yielding serving to compensate for irregularities in thickness or spacing of the filling.

A rock shaft 15 extends width wise of the loom beneath the lay. This shaft is mounted so as to be capable of oscillation at times but at other times is positively locked. The rock shaft is so locked at the time of beat-up by means of 25 arms 16, 16 fixed thereto which arms engage beneath fixed stops 17, 17 on the loom sides. Yieldable means support the filter 13 from the rock shaft. As shown, arms 18, 18 are fixed to the , rock shaft and extend upwardly and rearwardly 30 to receive, a fixed shaft 19. Brackets 20, 20, which are fixed to the filter, have bearing portions by which they are oscillatably mounted on the shaft 19. Coiled springs 21,21 each have one . end fixed with respect to the shaft and the other 35 end fixed to a bracket 20. The springs thus yieldingly oppose rearward movement of the reed at the time of beat-up. The rearward movement of which the reed is capable at this time is limited by cooperating stop shoulders on the arms 40 18 and brackets 20, as is clearly shown in Fig. 1.

The manner in which the parts just described operate to fulfill the function of a yielding reed will be apparent. It may be noted, however, that the arms 18, 18 are adjustably secured to the 45 shaft 15 and that adjustment of the arms about the shaft serves to adjust the distance between the limiting stop shoulders on the arms and brackets. The arms can be adjusted so as to entirely close the distance between the stop 5₀ shoulders, this preventing the yielding of the reed at the time of beat-up.

As the lay moves rearwardly, an arm 22, which may be integral with the right hand arm 16, engages in a notch in stop lever 23. This lever is 55 pivoted to the loom frame at 24, guided by a rod 25, and pulled forward toward a limiting shoulder 26 by a spring 27. The lever is set to be engaged by the arm 22 when the lay is about half way back on its rearward movement, which is about go the time the shuttle is picked. The arm moves away from the lever at a predetermined point in the forward movement of the lay, such point being the point in the loom cycle where the shuttle is supposed to have completed its flight. ₆₅ Thus, the shaft 15 is positively locked during the time the shuttle is normally in flight, such locking of the shaft serving to lock the reed against moving rearwardly more than the limited amount above mentioned.

When the shaft 15 is released from control of lever 23, as just described, the reed is capable of moving rearwardly a comparatively greater amount to prevent damage to the warp if the shuttle becomes trapped in the shed as in Fig. 2, 75 However, the shaft, filter and reed should not at this time be entirely uncontrolled. There is accordingly provided an arm, link 28 and spring 29 comprising a toggle for yieldingly opposing rearward movement of the reed. The spring 29 may be very light compared to the springs 21. 5 This toggle device is more fully disclosed in prior patent to Lindsjo, No. 1,956,075, granted April 24, 1934.

In the specific embodiment above described, the yieldable means supporting the filter member 10 for limited rearward yielding at the time of beatup is, in turn, bodily supported by the second yieldable means which permits the comparatively greater yielding of the filter when the shuttle becomes trapped. In the specific embodiment 15: above described, the locking means for the second yieldable means is inoperative to lock the reed against its limited rearward yielding at the time of beat-up and is also inoperative to prevent such limited yielding when the shuttle is in flight. 20 I find that in some looms, such as shuttle change looms for instance, the susceptibility of the reed to a slight rearward movement while the shuttle is in flight is not objectionable if such movement is positively limited to a comparatively small 25 amount.

It will be noted that since the invention as hereinafter claimed consists of a mechanism adapted to both the yielding reed and loose reed functions, the invention is not limited to the spe- 30 ciflc mechanism which is herein disclosed.