US806725A - Warp stop-motion for looms. - Google Patents

Description

PATENTED DEC. 5, 1905.

H. WYMAN.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED D110. 2, 190a.

llllll PATENTED DEC. 5, 1905.

H. WYMAN.

WARP STOP MOTION FOR. LOOMS.

APPLICATION FILED DEC. 2, 1903.

3 SHEBTS-SHBET 3.

UNITED STATES PATENT OFFICE.

HORACE WYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS.

WARP STOP-MOTION FOR LOOIVIS- Specification of Letters Patent.

Patented Dec. 5, 190 5.

Application filed December 2', 1903. Serial No. 183,434.

To all whom it may concern.-

Be it known that I, HORACE VVYMAN, acitizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Warp Stop-Motions for Looms, ofwhich the following is a specification.

My invention relates to warp stop-motions for looms, and particularly to an electrical Warp stop-motion in which two or more sets of drop bars or wires hung on the warpthreads intermediate the back roll and the harnesses are used. The dropping of one of the drop-bars on the breaking of the Warpthread on which it is hung will establish an electric circuit and through coacting mechanism will stop the loom in the ordinary and well-known way.

The object of my invention is to improve upon the construction of warp stop-motions of the class above referred to, and more particularly to provide in an electric warp stopmotion two sets of drop-bars with a free space between them and each drop-bar having a contacting projection thereon and an inclosed slot in its upper part and an openend slot in its lower part and two parallel terminals or circuit-bars of one pole, one terminal for each set of drop-bars, and extending through the inclosed slot therein, and a single terminal or circuit-bar of the opposite pole intermediate the two sets of drop-bars and substantially in line with the pair of parallel terminals, with which single terminal a projection on any one of the drop-bars will contact to establish the circuit between the terminal of one pole, on which the drop-bar is retained, and the terminal of the other pole intermediate the pair of terminals. The pair of parallel terminals and the intermediate terminal may be stationary or fixedly supported, but are preferably movably supported to be raised and give access to the broken warp-thread. The terminals may have a yielding connection with the main wires of the circuit, which are fixed on the loom-frame, so that the raising and lowering of the terminals will not break the circuit, or the terminals 'may have a connection by contact, which will be broken when the terminals are raised.

My invention consists in certain novel features of construction of my improvements, as will be hereinafter described.

Referring to the drawings, Figure 1 is a plan view of a warp stop-motion embodying my improvements. Fig. 2 is a section on line 2 2, Fig. 1, looking in the direction of arrow shows the movable frame carrying the terminals in its raised position. Fig. 5 is a section through the terminals taken at a point indicated by line 5 5, Fig. 1, looking in the direction of arrow a, same figure, showing a bridge or support for the terminals. Fig. 6 corresponds to Fig. 5, but shows a modified construction of the bridge. Fig. 7 shows another modified construction of the bridge. Fig. 8 is a plan view of a detached portion of the upper part of Fig. 1, showing a modified construction; and Fig. 9 is an end view of the parts shown in Fig. 8 looking in the direction of arrow 0, same figure.

In the accompanying drawings, 1 represents the end frames or plates of the warp stopmotion, adapted to be rigidly secured to the loom-frame.

2 and 3 are the transverse warp-supporting rods mounted in suitable bearings 1 on the frame 1. The warp-threads 4 are in this instance divided into two planes, which cross each other midway between the rods 2 and 3.

5 and 6 are transverse bars which extend between and are secured to the end plates 1.

7 represents four transverse rods secured at their ends to the end plates 1. Said rods serve to guide the lower ends of the drop-bars 8. The drop-bars 8 are made of thin sheet metal, as is customary, and in this instance are arranged in two parallel series. Each drop-bar 8 has in this instance an open-end slot 8 in its lower part and an inclosed elongated slot 8" in its upper part and a projection or extension 8 on one edge at its upper end, which forms a contacting surface.

Two parallel terminals, in this instance shown as rods 9 and 10 of circular or curved shape in cross-section, one for each set of dropbars 8, extend transversely through the inclosed slots 8 in the drop-bars 8. Said terminals 9 and 10 are both of one pole, in this instance negative. The terminals 9 and 10 are in this instance removably supported at one end by extending into holes in a non-conducting block 11,, as indicated by broken lines in Fig. 1. The block 11 is secured on a frame or bracket 12, which is preferably movable and in this instance is pivoted at one end on a pin 13, mounted in an extension 1 on the frame 1. A lug or ear 1 on the frame 1 in this instance limits the downward motion of the bracket 12. i The other ends of the terminals 9 and 10 are in this instance removably supported in recesses on a metal bar 14, which is insulated from the supporting frame or bracket 15, corresponding to the frame or bracket 12 and pivotally supported on apin 16.

A plate or bar 17 extends over the ends of the terminals 9 and 10 to hold .them in place and is secured to the bar 14 by a screw 18, as shown in Figs. 1 and 3. A wire 1 1 of the negative pole leads from the bar 1A to connect the terminals 9 and 10 with a magnet. (Not shown.)

Intermediate the terminals 9 and 10 is a terminal 19 of the opposite pole, in this instance positive. The terminal 19 in this instance consists of a flat metal bar, which is support-' ed on a bar 20, of non-conducting material, having edges which project beyond the edges of the terminal and are adapted to engage the inner edges of the drop-bars 8 and prevent their contacting with said terminal 19 except when a drop-bar is in its lowered position, when the extension 8 thereon will contact with the terminal 19, as shown in Fig. 2. The bar 20 and the terminal 19 are detachably supported at one end in the non-conducting block 11 by a screw 21 (see Fig. 1) and at their other end in a non-conducting block 23 on the bracket or frame 15. A wire 24 leads from the intermediate terminal 19,which wire in this instance is of the positive pole and leads to a magnet. (Not shown.) The intermediate terminal 19 is so placed relative to the terminals 9 and 10 and the drop-bars 8 that on the breaking of a warp-thread 4, on which a drop-bar is supported, the contacting projection 8' on the drop-bar will engage with the terminal 19, as shown at the left in Fig. 2, to establish or complete the electric circuit and through coacting mechanism (not shown) stop the loom.

In connection with the intermediate terminal 19 I preferably use adjustable plates 25, one at each end of the terminal 19 and adjustably connected therewith to have a motion toward and away from each other, in this instance by screws 26, extending through slots 25 in said plates 25. The plates 25 are preferably of non-conducting material and are for the purpose of holding in position the upper ends of the drop-bars 8 on the terminals 9 and 10 between said plates 25.

In connection with the terminals I preferably use a bridge 27, of non-conducting material, to hold the terminals 9 and 10 in proper relative position. The bridge 27 may be made in the form shown in Fig. 5, with recesses to hold the terminals 9 and 10, or in the form shown in Fig. 6, simply to support the terminals intermediate their ends, or, as shown in Fig. 7, to hold the terminals apart intermediate their ends. The bridge 27 is made of non-conducting material and is secured in this instance to the non-conducting bar 20 of the intermediate terminal 19 by a screw 28.

The wires 14: and 24 form a yielding or flexible connection between the terminals 9,

'10, and 19 and the main wires of the circuit,

so that the frame supporting the terminals can be raised without disarranging the connections or interfering with the circuit.

In Figs. 8 and 9 is shown a modified construction of the connection between the terminals and the wires of the circuit. On the outer side of the frame 1 is secured by screws 29 or otherwise a non-conducting block 30. To one side of the block 30 is secured a conductor 31, preferably a metal plate, to which -is attached the end of the positive wire 32.

The upper end of the plate 31 is in a position to be engaged by a pin 33 (which is attached by screw 3 1 to the end of the terminal 19) when the movable terminal 19 is in its lowered position, as shown. To the other side of the block 30 is secured a conductor-plate 35, to which is attached the end of the negative wire 36. The upper end of the plate 35 is in a position to be engaged by the extended end of the terminal 9 when said terminal is in its lowered position, as shown. The raising of the terminals with their supportingframes will disengage them from the plates 31 and 35, and thus break the circuit.

I have shown in the drawings the terminals 9 and 10 of the negative pole and the intermediate terminall9 of the positive pole; but it will be understood that the terminals 9 and 10 may be of the positive pole and the intermediate terminal 19 of the negative pole, if preferred.

I have shown in the drawings and herein described the terminals supported on movable supports. If preferred, the terminals may be supported in a fixed position on the frame.

The terminals upon which the drop devices are placed besides acting as terminals of the electric circuit also serve as guides to retain the drop devices in position, and said terminals will serve as well in mechanical warpstop motions to guide and retain the drop devices placed on the warps.

The terminals 9 and 10 being of circular shape in cross-section instead of fiat or noncircular, as is customary, reduce the frictional contact-surface between said terminals and the drop-bars 8, thus admitting of freer action of the drop-bars. The terminals 9 and 10 also act as guides for the drop-bars to direct their movement in a vertical direction at their upper ends.

It will be understood that my improvements may be combined with any well-known form of electric warp stop-motion and the details of construction may be varied, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is y 1. In a warp stop-motion, the combination with two warp-supporting rods, and two sets of drop-bars, each bar having acontacting projection on its upper end, and an opening in its upper part, of a pair of parallel terminals of one pole, extending above thewarp-supporting rods, and through the openings in the dropbars, and a terminal of the opposite pole between the pair of terminals, and adapted to be engaged by the contacting projection on a drop-be r, on the dropping of said bar, to complete the electric circuit,su bstantially as shown and described.

2. In a warp stop-motion, the combination with two sets of drop-bars with a space between them, and provided with openings through their upper part, anda contacting projection thereon at their upper ends, of two parallel terminals of one pole, extending through the openings in said drop-bars, an intermediate terminal of the opposite pole between said pair of terminals, and a non-conducting surface below said intermediate terminal, and between said drop-bars, substantially as shown and described.

- 3. In a warp stop-motion, the combination with two sets of drop-bars each bar having a projection or extension thereon, and an opening in its upper part, and two parallel terminals of one pole extending through said openings, of a terminal of the opposite pole, intermediate said drop-bar s, and a non-conducting surface below said intermediate terminal, to prevent the engaging of the edge of the dropbars with said intermediate terminal, except with the projection on the drop-bars, substan tially as shown and described.

4. In a warp stop-motion, the combination with two parallel terminalsof one pole, having a space between them, of an intermediate terminal of another pole, and a non-conducting surface between the intermediate terminal, and the parallel terminals, substantially as shown and described.

5. In a warp stop-motion, the combination with two sets of drop-bars, each set contacting with a terminal of one pole, and also with a terminal of the opposite pole, intermediate the two sets of drop-bars, on the breaking of a warp-thread, of a pair of parallel terminals of one pole, and an intermediate terminal of the opposite pole, and a non-conducting surface between the parallel terminals and said intermediate terminal, substantially as shown and described.

6. In a warp stop-motion, the combination with two parallel terminals of one pole, having a space between them, and an intermediate terminal of another pole arranged in said described.

7. In a warp stop-motion, the combination with two parallel terminals, and an intermediate terminal, of a bridge or support for the two parallel terminals, secured to the intermediateterminal support, substantially as shown and described.

8. In a warp stop-motion, the combination with the terminals carried on movable supports, of fixed electrical conductors in contact with said movable terminals, in their lowered position, to close the circuit, and out of contact in their raised position, to break the circuit, substantially as shownand described.

9. In a warp stop-motion, the combination with the terminals, and hinged or pivoted supports for said terminals, of a flexible or yielding connection to said movable terminals, to permit of said terminals being raised without disarranging the connections of the electric circuit, substantially as shown and described.

10. In a warp stop-motion, the combination with the terminals of an electric circuit placed above the warps, drop devices adapted to be supported on the warp-threads, and to contact with the two terminals of the circuit, when in a lowered position, by the breakage of a warpthread', of movable supports for said terminals whereby said terminals, may be raised when a warp-thread is broken, to give access to said broken thread, substantially as shown and described.

11. In a warp stop-motion for looms provided with warp-supports, and having two series of drop devices supported on the lower planes of the warps, each drop device provided with the slotted opening above the warps, two terminals of an electric circuit passing through said slotted openings, a terminal of another pole intermediate said two terminals, an indicating projection on each drop device, above the intermediate terminal, to contact with said intermediate terminal, and establish an electric circuit when a drop falls, substantially as shown and described.

12. In a warp stop-motion for looms provided with warp-supporting rods, and having two series of drop devices supported on the lower planes of the warps, each drop device provided with a slotted opening above the warps, two terminals of an electric circuit passing through said slotted openings, a ter minal of another pole intermediate said two terminals, said terminals movably supported above the warps, an indicating projection on each drop device, above the intermediate terminal, to contact with said intermediate terminal, and establish an electric circuit when a drop falls, substantially as shown and described.

13. In a warp stop-motion for aloom, the

combination with two sets of drop-bars, each drop-bar having an opening in its upper part and a contacting projection at its upper end, and a terminal of an electric circuit of circular shape in cross-section, extending through the openings in each set of drop-bars, of a terminal of the opposite pole extending between the two sets of drop-bars at their upper ends, and adapted to be engaged by the contacting projection at the upper end of each drop -bar, substantially as shown and described.

14. In a warp stop-motion for looms, the combination with the terminals of two opposite poles of an open electric circuit, and dropbars to close the circuit when any of said bars are in contact with both terminals, and two warp-supporting rods below said terminals, or a movable Irame for supporting said terminals, which move with said frame, substantially as shown and described.

15. In a warp stop-motion for looms, the combination with warp supporting .rods adapted to divide the warps into two planes, and two series of drop-bars adapted to be supported on the lower planes of the warps, and provided with a slotted opening above the warps, of two terminals of an electric circuit passing through said openings, and a terminal of an opposite pole for each set of dropbars outside thereof, and adapted to be engaged by said drop bars, substantially as shown and described.

16. In a warp stop-motion for looms, two supporting lease-rods, adapted to divide the warps into upper and lower planes, drop-bars adapted to be supported on the lower planes of the warps, and having a contacting projection on their upper ends, and a slot in their upper parts, and circular terminals of an electric circuit extending through said slots, and terminals of the opposite poles above said lease-rods, to contact with the drop-bars, substantially as shown and described.

17. In av warp stop-motion for looms, the combination with two lease-rods, adapted to extend transversely through the warp-threads and to divide them into two planes, upper and lower, of terminals of an electric circuit extending above said lease-rods, and drop-bars having a contacting projection at their upper ends, and an opening in their upper part to receive the terminals of one pole, said dropbars adapted to be supported on-one of the planes of the warp, substantially as shown and described.

HORACE WYMAN. Witnesses:

J. (J. DEWEY, M. HAAs.

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