US1762382A - Automatic stop for double-pile-fabric looms - Google Patents

Description

June I0, 1930. c. A. BoNDzxuLls AUTOMATIC STOP FOR DOUBLE PILE FABRIC LOOMS Filed'sept. so, 1929 2 sheets-sheet 1 June 10, 1930. c. A. BoNDzluLls 1,762,382

AUTOMATIC STOP FOR DOUBLE PILE FABRIC LOOMS Filed Sept. 50, 1929 2 Sheets-Sheet 2 Patented .lune 10, 19.30

PATENT OFFICE cnAnLEs n. BoNnzIULIa or WAT'EBBUBY, coNNEcmIoUT AUTOMATIC STOP FOR DOUBLE-IPILE-FABBIC 'LOOKS Application :tiled September 30, 1929. Serial No. 396,089.

This invention relates to im roved automatlc stops for double-pilefabric looms which are characterized by having a pilecuttlng knife lfor cutting the double-pile `fabric-into two single-pile fabrics, and constltutes an improvement upon the device shown and described in United States Patent No. 1,635,396, `granted to me July 12, 1927.

n The object-of this invention is to provide a slmple and reliable stop-mechanism for double-pile-fabric looms which will function to automatically stop the yloom and thus prevent damage to the fabric being woven,

, should the propelling cor'd of the pile-cutting knife bebroken or displaced for any reason, andwhich will be characterized by low cost for manufacture, ease and simplicity of installation, and sureness of operation.

- With this object in view, my invention consists in an automatic stop for double-pilefabric looms having certain details of construction and combinations of parts as will be hereinafter described and particularly recited in the claims.

In the accompanying drawings:

Fig. 1 is a schematic view mainly in front elevation of my improved automatic stop shown as applied to a double-pile-fabric loom, the parts being shown in the positions due them under ordinary operating conditions; 4

` Fig. 2 is an enlarged-scale broken sectional view taken on the line 2-1-2 of Fig. 1;

Fig. 8 is a similar view but showing the parts in the positions due them when the trip-arm has been interposed in the path of the reci rocating reed-beam by slackness in the kni e-cord;

` Fig. 4 is an enlarged-scale sectional view taken on the line 4-4 of Fig. 1;.

, Fig. 5 is a broken plan view of the shelf or ledge with the control-lever in section;

Fig. 6 is a vertical sectional view taken on the line 6-6 of Fig; 1; and A Fig. 7 is a broken faceview showing a construction -in which the operating-cord is directly connected to the trip-arm,

` IIx-carrying out my invention as herein shown, 'a loom-control box 10 contains appropriatemechanism such as a clutch or electric switch for stopping and starting the loom. Thls mechanism, whatever its character, is operated by a control-lever 11 extending u ward through a clearance-slot 12 in a shel or ledge 13 forming a part of the loomframe. The slot 12 is formed with a laterally-offsetting notch providing a shoulder'14 for holding the control-lever 11 in its on position against the tension of a spring 15 which tends to move it into its olf posilziion vhich is indicated by broken lines in Depending from the under-face of the shelf or ledge 13 is an L-shaped bracket 16 carrying at its lower end a guide-block 17 having a guide-passage 18 extending from front to rear therethrough and enlarged at its front and rear ends to form recesses 19 and 20 respectively;

. Reciprocating in the guide-passage 18 is a tri -plunger 21 formed near its rear end with a ange 22 against the forward face of which a helical spring 23 bears. The spring 23 just referred to encircles the trip-plunger 21 and bears at its forward end against the bottom of the recess 20 in the block 17 and serves to normally hold the plunger 2l in its rearwardly-extended position as shown in Fig. 2.

To limit the rearward movement of the plunger, I mount upon the forward end thereof by means of a pin 24, a collar 25 which is adapted to fit within the recess 19 and engage thebottom-wall thereof.

At the extreme rear. end of the triplunger 21 which hascapacity for both oscillating and reciprocating movement in the guide-block 17, is a rectangular trip-arm 26'secured thereto by a depending pin 27 and formed in its outer end with a latching-notch 28 adapted to receive the free outer end ofa pivotal eo latch-bar 29 `mounted by means of a pin 30 for swinging movement in the horizontal plane upon a lateral arm 31 offsetting from the guide-block 17 aforesaid.

The arm 31 of the guide-block 17 is formed 05 with a rearward extension 32 to which is secured one end of a helical spring 33, the op osite end of which is secured to'the depending lower end ofthe pin 27 which serves to secure the trip-arm 26 to the trip-plunger 21.

The spring 33 exerts 'a constant effort to reed-'beam 34 forming a usual feature of looms. To check the upward swinging movement through the trip-arm 26, I provide a stop-arm 34a which rearwardly offsets from the guide-block 17 (Fig. 4).

A pile-cutting knife 35 is reciprocated in the usual manner of double-pile-fabric looms as required to cut a double-pile fabric 36 into two separate single- pile fabrics 37 and 38,such asvelvet, plush, or similar material (Figs. 2 and 3), by means of a cord or' cable 39 passing over a floating idler-pulley 40 having capacity for vertical movement, as will be hereinafter described, and over idler- pulleys 41, 42, 43, 44, 45, and around an oscillating drum 46 by means of which the cord 39 and hence the knife 35 is moved rst in one direction and then in the other to sever the double-pile fabric 36 as woven, into the two single- pile fabrics 37 and 38.

The floating idler-pulley 40 is mounted for vertical sliding movement between the opposite side- bars 47 and 48 of a guide-frame 49 which is provided with an offsetting boss 50 provided with a vertical passage 51 for 'vertical sliding movement upon the depending arm of an L-shaped bracket 52 secured to the under-face of the shelf or ledge 13. A setscrew 53 'passing through the'forward end of the offsetting boss 50 serves` to clamp the guide-frame 49 in anyone of a variety of positions of vertical adjustment.

The said floating idler-pulley 40 is also mounted for rotation uponI a short transverse shaft 54 flattened at its respective opposite ends for sliding movement in vertical slots 55 and 56 formed in the side- bars 47 and 48 respectively of the guide-frame 49.

Connected to the rear. end of the shaft 54 1s an-operating-cord or cable 57 running over a small pulley 58 secured to the upper end of the side-bar 47. The opposite end of the l operating-cord or cable 57 is secured to the free inner end of the pivotal latch-bar 29, as clearly shown in Figs. 1 and 4 of the drawings.

Under ordinary operating conditions, the

cord 39, by passing underneath the floating idler-pulley 40, will maintain the same near the upper end of the guide-frame 49 and hence relieve the operating-cord 57 of tension so that the latch-bar 29 remains in place in the notch 28 of the .trip-arm 26,- whereby the same is held in a horizontal position against the counter-urge of its spring 33 and hence below the path of the reciprocating reed-beam 34 which is provided with reeds 59'act-ing in the vusual manner to beat up the filling threads of the fabric 36 as it is being woven.

In the event that the knife-cord 39A should break or for any reason become dismounted from its pulleys in such manner as to cause s'lackness in its tension, it will permit the floating idler-pulley 40 to descend in the guide-frame 49 with the eect of drawing upon the operating-cord 57 and hence swing the free end of the latch-bar 29 out of the notch 28 of the trip-arm 26 so as to permit the same to beswung by the spring 33 from the position shown in Figs. 1, 2 and 4 of the drawings into its vertical position, as shown in Fig. 3 of the drawings. In this latter position, the upper end of the trip-arm 26 lies in the path of the reciprocating reedbeam 34 and will be engaged thereby with the effect of sliding the trip-plunger 21 from rear to front to cause the same to move the control-lever 11 out of engagement with the shoulder 14 of the slo't 12, thus releasing the said control-lever to the action of its spring 15 by which it is swung into its olf position, as shown by broken lines in Fig. 1. The loom is thus automatically brought to a stop before any appreciable damage to the fabric being woven can occur.

Instead of latching the trip-arm 26 in its horizontal position and providing a spring for swinging it into its vertical position when unlatched, I may, if desired, omit the said latch and spring and connect the operatingcord or cable 57 directly to the lower end of the pin 27, as shown in Fig. 7 of the drawings, so that when the floating idler-pulley 40 is permitted to descend by gravity when the tension of the knife-cord 39 is slackened for any reason, the weight of the descending pulley 40 will act directly to swing the triparm 26 into its vertical position so as to interpose its upper end in the path of the reciprocating reed-beam 34.

By providing a plunger which is mounted for both oscillating and reciprocating movement and providin the same with an odsetting arm, I am ena led to dispense with the cumbersome and complicated mechanisms heretofore employed for the purpose of automatically stopping double-pile-fabric looms.-

I claim:

1. In a double-pile-fabric loom, the combinationwith a power-control mechanism, ilecutting knife-cord, and reed-beam thereo of a statlonary guide-member; a trip-plunger mounted for both oscillating and reciprocating movement in the said guide-member in position to co-act with a part of the said control-mechanism to cause the same to move into its off position; an arm secured to and laterally-offsetting from said plunger and normally lying out of the path of movement of the said reed-beam and means brought into play by the slackness in the said kmfecord for turning the said plunger to swing its oifsettin arm into the path of the said reed-beam.A or actuationtherebv.

, 2. In a double-pile-fabric loom, the combination with a power-control mechanism, pilecutting knife-cord, and reed-beam thereof; of a stationary guide-member; a trip-plunger mounted for both oscillating and reciprocating movement in the said guide-member in position to eo-act with a part of the said control-mechanism to cause the same to move into its o position; an arm secured to and laterally-offsetting from said plunger vand normally lying out of the path of movement of the said reed-beam; yielding means no1- mally tending to turn the said plunger so as to swing its osetting arm into the path of the said reed-beam; a latch for holding the said ofsetting arm in its reed-beam-clearance position; and means brought into play by slaokness in the said knife-Cord for retracting the said latch to permit the said yielding means to turn the said plunger` n a direction to swing its offsetting arm into the path of the said reed-beam.

Y In testimony whereof, I have signed this i specification.

CHARLES A. BONDZIULIS.

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