US1832580A - Electrical warp stop motion - Google Patents

Description

Nov. 17, 1931. J. REGAN 1,832,580

ELECTRICAL WARP STOP MOTION Filed Sept. 5. 1929 fvvav 727R JUH/V R5 SAN A TFQRNE r5 Patented Nov. 17, 1931 UNITED STATES PATENT OFFICE} JOHN REGAN, OF NEW BEDFORD, MASSACHUSETTS, ASSIGNOR T0 CROMPTON 8c KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS Application filed September 5, 1929. Serial No. 390,500.

This invention relates to improvements in electrically operated warp stop motions more particularly for looms and it is the general object of the invention to provide means for retaining the indication for stopping until a predetermined point is reached in the cycle of the operation of the loom.

When there is a fault in the warp it is desirable to stop the loom with the lay in a given position, for instance, in back position, so that upon starting up the filling will be given the full blow of the lay to beat in the filling properly. In electrically operated warp stop motions the closing of the circuit is likely to oc cur'at any point, depending upon when the warp fault occurs. It is an important object of my present invention to provide an electrically operated control device which can be retained in knocking-off position until the desired point in the cycle of the loom is reached, at which time a regularly moving actuator will effect loom stoppage;

With these and other objects in view which will appear as the description proceeds, my-

invention resides in the combination and ars rangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a side elevation of a loom having my invention applied thereto, certain parts being removed for the sake of clearness,

Fig. 2 is a side elevation on an enlarged scale of the controller and associated parts as shown in Fig. 1, 3

Fig. 3 is a horizontal section taken on line 33 of Fig. 2,

Fig. 4 is a detailed side elevationof the latch or trip which retains the indication,

Fig. 5 is a perspective View showing therelation between the latch and the connector rod, I

Fig. 6 isa detailed vertical section on an enlarged scale on line 66 of Fig. 1, and

Fig. 7 is a detail plan view of the solenoid and its mounting, looking in the direction of arrow 7, Fig. 2.

Referring to Fig. 1, I have shown a loom frame 10 supporting a constantly rotating shaft 11 on which is mounted a cam 12 having a point 13 to cooperate with cam lever 14 pivoted to the frame at 15. The upper end of the lever is provided with an actuator knife edge 16 which during normal operation of the loom reciprocates, moving rearwardly from the position shown in Fig. 1 either every pick of the loom or every second pick of the loom, depending upon the rate of rotation of the shaft 11.

Each bank of drop wires 17 is guided by an electrically charged bar 18 passing through the drop wires which rest on the warp W. Between pairs of banks of the drop wires I locate electrode rods 19, there being two bars set forth in Fig. 1. It is to be understood that the electrodesor rods 19 are electrically connected by means of wires 20 to one side of a battery P, and that the bars 18 are all electrically connected to a wire 21 which is connected through devices to be described to the opposite side of the battery P.

A shipper handle 22 is secured to shipper rod 23 and isoperatively related to the upper end of a rocking lever 24. The latter is pivoted intermediate its ends as at 25 to a.

fixed part of the loom and has the lower end usual construction and of themselves form no part of my present invention.

In carrying my invention into effect I provide a supporting rod 30 which is secured in any approved manner to the loomside and mount thereon a frame 31 having a split hub 32 which is gripped tightly to the rod by means of a bolt 33. Extending upwardly from said frame is an arm 34 having secured thereto a solenoid 35. The latter is held in vertically adjusted position by means ofa strap -36 and bolt 87, as shown in Fig. 7.

A core 38 extends loosely through the solenoid and has the lower end provided with an eye 39 through which extends a rod 40.

The latter has mounted for adjustable movement thereon a weight 41 held in adjusted position by set screw 42. The rod extends into a hub formed on lever 44 and is held in position by set screw 45. Lever 44 is pivoted on a. stud 46 held to frame 31 by means of set screw 47. The lever 44 has a depending arm 48 provided with an eye 49 through which extends the rear end of the previously described rod 28. The latter has the rear end thereof hooked as at 50 to cooperate with the actuator or knife edge 16.

A. s cond hub 51 formed as part of the frame 3t has held therein for adjusted longitudinal position by means of set screw 52 a. supporting rod 53 which is slotted as at 54, see Fig. 5. A latch 55, preferably of sheet metal, is pivoted to the rod 53 in the slot by means of a pin 56. A. small finger 57 on the latch extends under the rod 53 and limits movements of the latter in a counterclockwise direction as viewed in Fig. 4. The lower end of the latch is provided with a downwardly and rearwardly extending cam face 58, while the under side of the latch is preferably horizontal as at 59. The latch may be COLll'ltQIWQlglltQCl to remain normally in the position shown in full lines, Fig. 4.

A small, wire 60 is secured to the rear end of the rod 28 and extends normally over the inclined cam 58 and is out of alignment with respect to a vertical line passing through a pivot 56 in a direction toward the finger 57. Rotation of the rod 28 is prevented by reason of the fact that the head 27 has a rectangular portion 61, see Fig. 6, which moves in a slot 62 formed in a guide stand 63 for said head, the stand being secured to the loom frame in any approved manner.

Under normal conditions, when all the drop wires are elevated, the weight 41 will counter-balance the arm 48 and the rod 28 so that the hook O lies above the actuator knife 16. The latter is moving in its usual manner will therefore not engage the rod 28 and the latter, together with the shipping mechanism, will be left in running position. then one or another of the drop wires falls, however, current will flow from the battery P over wire 70, through the solenoid 35, through wire 21 to the bar 18 which is in contact with the fallen drop wire, through the latter to the rod 19 contacting therewith, and from the rod over wire back to the battery P. Current flowing in this circuit will energize the solenoid, causing the latter to draw its core 38 upwardly, overpowering the weight 41 and rocking the lever 44 around the stud 46 in a counter-clockwise direction as viewed in Fig. 2. T he arm 48 and the rod 28 will therefore move downwardly and the wire 60, in moving down with the rod 28, will engage the inclined cam face 58 and rock the latch from the full to the dotted line position shown in Fig. 4.

The rod 28 will give sufficient movement to the rod 60 to move the latter below the latch, whereupon the latter will move back to the full line position shown in Fig. 4, said wire engaging the substantially horizontal undersurface 59 of the latch. Should the solenoid become deenergized because of vibration of the fallen drop wire, the core will tend to fall together with the weight 4'l, but the wire 60 will be restrained from upward movement by the latch and the rod 28 will therefore be held down. Under the conditions last described the book 50 will be in down position and as the knife edge 16 moves rearwardly these two parts will be engaged and the lever 14 will act through connector rod 28 to rock the lever 24 to the right as viewed in Fig. 1, the effect of which is to stop the loom.

It is to be understood that by reason of the mountings of rods 40, 4'3 and 5 5 the several parts carried thereby can be adjusted and it is also to be understood that by reason of set screw 37 and strap 36 the force exerted by the solenoid on the core 38 may be Varied within limits.

From the foregoing it will be seen that I have provided means for retaining an indication from an electrical warp stop motion so that even though jarring of the loom should break tie circuit which gives the indication, mechanism will nevertheless be operative to stop the loom at the predetermined time. It will further be seen that by changing the location of the split hub 32 on the rod by means of the nut 33 I may vary the vertical location of the hook with respect to the knife edge 16. Furthermore, the location of the weight 41 can be varied to lessen the amount of pull which must be exerted by the solenoid in order to lower the rod 28. Also, it will be seen that when in retained position by the latch the rod is so related to said latch that any upward force which might be exerted by the weight 41 with the solenoid deencrgized will tend to hold the latch in retaining position.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1.111 a warp stop motion, a regularly moving actuator, a knock-off member, a lever operatively connected to the member, a solenoid, a core for the solenoid, a core for the solenoid operatively connected to the lever, the solenoid to be energized upon occurrence of warp fault to attract the core and to cause rocking of the lever to effect movement of the member into the path of the actuator, a latch normally out of holding relation with respect to the member, the latter when moviuu ing into the path of the actuator engaging the latch to move the same out of normal position, the latch thereafter returning to normal position to have engagement with the member to hold the same in the path of the actuator independently of the solenoid, said member having a laterally extending element to engage the latch, and a means to prevent rotation of the member about its 10 longitudinal axis.

2. In a warp stop motion, a regularly moving actuator, a knock-0E member positioned for direct engagement with the actuator at warp fault, a lever operatively connected to the member to determine the position of the latter, a solenoid and core therefor connected to the lever to rock the lever when the solenoid is energized and move the memher into the path of the actuator, a relatively 20 fixed element, and a latch to be interposed between the member and element when the solenoid is energized, the latch to have direct holding engagement with the knockofi member to maintain the latter in the path of the actuator during the interval between energization of the solenoid and engagement of the actuator and knock-oft" member.

In testimony whereof I have hereunto so afiixed my signature.

JOHN REGAN.

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