US1495682A - Warper stop motion - Google Patents

Description

I May 27 1924.

D. A. FORTUNE WARPER STOP MOTION Filed Sent. 11, 1922 2 Shasta-Sheet l May 27 1924. D. A. FORTUNE WARPER STOP MOTION Filed Sept. 1-1 1922 2 Shoots-Sheet 2 Patented May 27, 1924.

UNITED STATES PATENT OFFICE.

DAVID A. FORTUNE, F METHUEN, MASSACHUSETTS, ASSIGNOR T0 CROMPTON &

KNOXVLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

WARPER, STOP MOTION.

Application filed. September 11, 1922.

To all whom it may concern:

Be it known that I, DAVID A. FORTUNE, a citizen of the United States, residing at Methuen, in the county of Essex and State of Massachusetts, have invented a new and useful )Varper Stop Motion, of which the following is a specification.

This invention relates to means for stopping a warper upon the breakage of one or more of the warp threads. When a warper is stopped for this or any other reason, the spools in the creel do not stop simultaneously with the warp beam but continue to revolve sufficiently to slacken many of the warp threads. Then the warper is again started in operation, the drop wires associated with these slackened threads are thus below their proper running position.

It is the object of my invention to provide a stop motion for a warper having special provision which will permit the machine to be started slowly after stopping and which will at the same time leave the drop wires free to be raised to running position as the threads are tightened.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a side elevation of a warper embodying my improvements;

Fig. 2 is a sectional plan view taken along the line 22 in Fig. 1;

Fig.3 isa sectional side elevation taken along the line 3-3 in Fig. 2:,

Fig; 4 is a detail side elevation of certain parts to be described; v

Fig. 5 is a partial view similar to Fig. 1, but showing the parts in a different position; and

Fig. 6 is a detail sectional elevation, taken along the line 66 in Fig. 2.

Referring to the drawings, I have shown parts of a warper comprising a frame 10 in which a drum 11 is mounted for rotation, the drum'being driven from a shaft 12 through gears 13 and 14. Tight and loose pulleys 15 and 16 are mounted on the shaft 12 and are driven by a belt, not shown. The position of the belt is determined by a ship- Serial No. 587,347.

per fork 17 mounted on a rod 18 slid-able transversely in the frame 10.

A bell crank 19(Fig. 6) is provided with a forked upper end engaging a grooved collar 20 on the shipperrod 18. .The horizontal arm of the bell crank 19 has a slot 21 (Fig. 6) through which projects the end of an arm 22 (Fig. 2) fixed to a rock shaft 23. The shaft 23 is pivoted in bearings in the lower portion of the frame 10 and is provided with foot levers 2ft and 25, by the depression of which the belt may be shifted to start the machine.

A latch 26 (Figs. 1 and 5) is pivoted at 27 to the foot lever 2e and is provided with a shoulder 28 (Fig. 5) in its upper portion adapted to engage a latch plate or bracket 29 fixed to the warper frame. When thus engaged, the latch holds the lever 24: depressed, with the belt on the tight or driving pulley 16.

The drum 11 directly engages the warp threads upon the warp beam WV which is held in contact with the drum by arms 30 extending rearward from the frame 10.

The parts thus far described are of the usual construction and themselves form no part of my present invention.

' The stop motion with which my improvements are embodied herein is of the type fully "disclosed in the patent to Holmes, No. 1,360,638, issued November 30, 1920.

' In a stop motion of this type, the drop wires 31 (Fig. 4c) are arranged in banks between guide rods or separator plates 32 (Fig. Each drop wire is also provided with an opening having a relatively broad lower portion 33 and a relatively narrow upper portion 34 (Fig. 4). Detector rods 35 extend through the openings in the drop wires and are arranged for regular and repeated oscillating angular movements.

If the drop wires are all held raised by the warp threads, the detector rods 35 oscillate freely in the wide portions 33 of the openings in the drop wires and the stop motion remains inoperative. If, however, a drop wire falls, it engages its detector rod in the narrow portion 34 of its opening, holding the rod from angular movement and causing the actuating mechanism of the stop motion to stop the machine. This mechanism includes a rocker arm or actuator 36 pivoted to the frame of the stop motion and continuously oscillated through a link 37 by an arm 38 having driving connections, not shown. A pawl 39 is mounted on an arm or support 40 and is moved clear ofa lug or projection 4-1 on the rocker arm 36 so long as thedetector rods 35 are free to move angularly. If, however, such angular movement is prevented, the pawl 39 remains in the path of the lug 41 and the arm or support 40 is swung about its fixed pivot. This support 40 has a pin and slot connection with a knock-off lever 42 pivoted at 43 on the warper frame and having a depending portion 44 engaging the upper end of the latch 26.

When the support 40 is swung about its pivot as above described, the knock-off lever 42 is actuated to releaes the latch 26 from the latch plate 29, permitting the rock shaft 23 to be moved by a weight 46 which is secured thereto. Such movement of the rock shaft actuates the shipper rod to move the belt to the loose' pulley, thus stopping the warper.

The spools in the warper creel, as stated, often continue to revolve after the drum 11 and warp beam W have come to rest, thus slackening the warp threads which support the drop wires 31. These wires accordingly fall and receive'the corresponding detector bars 35in the narrow portions 34 of the openings in the wires.

. As soon as the warper is started, the oscillating mechanism of the stop motion tends to'yieldingly move the detector bars 35 angularly. Such movement would bind the drop wires in their lower position and would render it difficult to straighten the warp threads and thus raise the drop wires to run ningposition. Furthermo-re, 1f the warp threads are drawn through the drop wires when in such lowered position, the path of the threads is angular and the threads may be frayed or broken if the thread openings in th drop wires should have rough edges.

In order to prevent such binding action by the detector bars 35, I have provided a holding bar 47 (Fig. 3) having a lost-motion pin and slot connection at its lower end to an arm 48 fixed on'the rock shaft 23. At its upper end, the bar is vertically slidable in a bearing 49 and is forked or slotted at 50, so that the two portions of the fork may pass on either side of one of the detector bars 35.

When thus engaged, this detector bar is held from angular movement and the other detector bars are so connected thereto by links 51, that they also are held stationary. The slot 50in the locking bar 47 is of slightly less width than the detector bar 35, so that the latter is frictionally engaged by the locking bar .47, which will be held in raised position until positively moved downward.

In the operation of the machine, it is customary for the operator to start the machine slowly by partially depressing the foot lever 24 or 25. The lost-motion connection between the arm 48 and the bar 47 permits such partial depression of the foot lever without disengaging the bar 47 from its detector bar 35. The detector bars are thus held from oscillation until the foot lever is fully depressed and the machine is running at full speed. Before this point is reached, the slack of the warp threads will have been taken up and the drop wires will have been raised so that the bars 35'may oscillate freely in the wide lower portions of the openings in th wires.

So long as the bars 35 are held from oscillation, the knock-off lever 42 will be intermittently actuated to move the latch 26 away from the latch plate 29 in an effort to stop the-machine, but as the latch is at thisv timein a partially raised or inoperative position, such action by the knock-off lever is immaterial.

Having thus described my invention and the operation thereof, I do not wish to be limited to the details herein disclosed other wise than as set forth in the claims, but what I claim is 1. In a warper, driving mechanism, controlling devices therefor, a warp stop m0- tion including a plurality of drop wires and regularly moved detector members extending through said drop wires and having an angular oscillating detecting movement, means positioned by said controlling devices and effective to lock said detector members from such oscillating movement when said warper is stopped, and a lost motion connection between said locking means and said controlling devices, whereby said members will remain looked as the machine is thereafter started at relativel slow speed.

2. In a warper, driving mechanism, a warp stop motion comprising a plurality of drop wires, detector members extending therethrough, and means engaging said detector members to prevent said members from binding said drop wires when the machine is stopped and thereafter until the driving mechanism is substantially restored to' full operative position.

3. In a warper, driving mechanism, controlling devices therefor, a warp stop motion comprising a plurality of drop wires, detector members of non-circular cross section associated therewith, and a forked looking bar movable by said controlling devices to frictionally engage a detector member and hold the. same from movement until positively moved from engagement therewith.

4. In a warper, driving mechanism, controlling devices therefor, a Warp stop motion comprising a plurality of drop Wires, detector members of non-circular cross section associated therewith, and a forked lock- 5 ing bar movable by said controlling devices to frictionally engage a detector member and hold the same from movement until positively moved from engagement therewith, said locking bar having a lost motion connection with said controlling devices.

In testimony whereof I have hereunto affixed my signature.

DAVID A. FORTUNE.

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