US951487A - Warp stop-motion for looms. - Google Patents

Description

J., EBG.

WAHI STOP MOTION FOR LOUMS.

APPLIOATIOH nun MARJO, 190e.

95 1,487. Patented Mar.v s, 1910.

Uisirrnj erectile rsa ,atras ma im is i r. @ist JOHN REGAN, OF NEW BEDFORD', MASSACHUSETTS, ASSGNR T0 CROMPTON & KNOWLES LOOM WORKS, [s GORIPORATION OF MASSACHUSETTS.

WAR? STOP-MOTION :FCR LOMS.

Specification of Letters Patent.

retenait@ sisi. s, isis.

Application tiled March 10, 1906. Serial No. 305,211.

To all whom it may concern.:

Be it known that I, JOHN REGAN, a citizen ofthe United States, residing at New Bedford, in the county of Bristol and State vof Massachusetts, have invented certain ne v and useful Improvements in'Y Var Stop Motions for Looms, of which the fo lowing isa specification.

My invention relates to warp stop nio tions, and particularly to a warp stop motion of the class` shown and described in U. S. Letters Patent, No. 818,765. In said patent the Warp stop motion is supported by the warp threads and is movable up and down therewith in a vertical plane, and as shown and described in said patent the war stop motion comprises lease rods, and .gui es for the drop devices, and Warp supporting rests, and end frames for the same, all of which are supported on the Warp threads. n order to overcome this excessive Weight on the warp threads, coil springs are provided to act as counterbalanees to lessen vthe weight, but in the process of weaving, the repeated formation of the sheds gives to the Warp stop motion a vibratory motion up and down upon the shaft upon which it is mounted. It is found in practicethat this vibratory motion, occurring at every formation of the shed, and some one hundred and fifty or more times a minute, acts by the momentum of the Weight of the counterbalance springs to move the motion, beyond the movement of the Warp threads themselves, and thereby stretch or strain the Warp threads, and instead of obtaining,- the advantages to be derived from the movement of the Warp stop motion with the Warp threads, such vibratory motion proves detrimental to the warp threads, and to the accuracy in which the Warp threads are laid in thc-fabric. ln order to obtain the advantages desired with this patented construction of the warp stop motion, have in my improvements combined therewith supplemental mechanism, which, as shown and described herein, comprises an arm attached to the rock shaft on which the. motion is mounted, and a cani, in this instance fixed on one end of the' crank shaft, to engage and move said arm; said cam makes one revolution during each movement of the harnesses to form the shed,.and preferably have the cam of such shape as to give such a movement to the Warp stop motion, that the drop devices and Warp supporting rods or rests will coincide Withthe movement ofv the Warps and the drop devices, which reston the Warp threads7 as said threads moveto form the sheds.

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

have only shown in the drawing a ie-- tached portion'of an electric warp stop motion of the class referred to, suiiicient to enable those skilled in the art to understand the construction and operation of my improvements.

Referring to the drawing :-i1`igure l is a vertical section through a Warp stop motion embodying my improvements, take-n at. a point indicated. by line 1, l, Fig, 2, looking in the direction of arrow al, same figure, and, Fig. 2 is a side View of the parts shown in. Fig. l, lookingI` in the direction of arrow o, saine figure. rlhe warp threads are. not shown in this figure.

.in the accompanying drawing, l is a de tached portion of a loom frame or sidel 2 a stand secured thereto and having a bearing .2 for a rock shaft 3. ifs. hub cured on the rock shaft 3 by set screws 3, and has a boss 1l in which is adjustably secured,

lby a set sere-W G, one end of an angle rod 7;

the other end of the angle rod 7 is adjustably secured by a set screw 8 in the boss Si on the end frame t) of the Warp stop motion.

Extending` between the end .frame 9, and an end frame on the opposite end ofv the Warp stop motion, not shown, are in this instance three Warp supporting rests or rods 10, over which the Warps llfroin the Whip reid l pass. The two end frames 9 and the angie' rods form in this instance the supports for the Warp rests or rods it), intermediate the warp supporting rods it?, and the har.- nesses, not shown, are preferably 'tivo lease rods 18, Whicf v'divide the Warps il into two planes. All of the Warp threads are supported` on the Warp rests 'or rods 1G. The warp supporting rods and the lease rods may be arranged as shown and described in Letters Patent, lto. 813,765, above referred to, if preferred.

The drop devices le are arranged in two sets, and each drop device is supported on a warp thread, and has instance in .jectio'n 41li 'the eem liever 19, i.' when 'the harnesses ere in their iowered poopen end slot in its lower part, and afeiosed.

siot or opening in its upper part through which extends a guide rod 15, which is secured to the end frames of the warp stop motion, und this instance acts as one ot the terminelsot en. electric'cireuit. Ei:- tending hetvveen the two sets of drop devices 14e, and supported on Iand secured at each end to the end frames of the warp stop-motion, is n her 16, which forms the opposite terminait of the electric circuit. A Wire 17 of one pole, positive, is connected with the har or terminal 1G, und e wire 18 of the opposite pole, es negative, is connected to each oi: the rods or terminals and said wires 1'? and 18 lead to mechanism not shown, 'for stopping the Iloom in the usuali `sind Weli known lwey.

It vviil he understood that upon the breeking of n werp thread, the drop device supported thereon is lowered until its side pro engages the central terminal 16, :is shown in Fig. 1, to close the circuit, and

' censo mechanism to he operated to lstop the loom, inthe usual :1nd well known wey. Fest on one end of the rock shaft 3 is the huh 19- oi n cem iever 19, which in this instance extends in o suhstsintiai horizontal piene, with its engaging end restingr on or cam 20, the huh 20 of which is in this instance secured hy set. screw 21 on n driven she'it 22, see Flog. The position of the 2O on the driven shot-t 22, relative to is preferably such, that si n thecem iever 19 wiii he engaged by the iovvest port oli 'the com, is shown in Fie. 1, end. when the harnesses ere in their raised position 'the eem lever ivi-il. be in its highest position reletive to the com lever 19, so that. the op sind down movement o the werp stop motion will correspond .to the up and,

down mmf-ement ot' the harnesses, and thus e the ,vai-p threads from any undue i or strain fit 'will thus he seen that o3?? the com 20, and. cam lever 19, s, ioni movement is communicated motion, to cause the seme own with the Werp threads, i is entirely independent oi threads, as they i et .my i.inprovements will semer be readily appreciated by those skilled ih the nrtu I believe I am the'firstfto so govern the movement of the Whole Werp stop motion,

which embraces the worp rests or rods to l support thev Warp threads, and maintain their proper et. all times, so that they will coincide in movement 'with the' movement of the Warp J"orm the sheds, and there is no abnormal strain put upon the-'Warp threads due to the presence of the Warp stop motion through which the werp threads are carried.

It will be understood that the details of construction of my improvements may be varied if desired, and they may be adapte to be used in connection with mechanical werp stop motions, and dii'erent classes of electric Warp stop motions. Instead of e cam and com lever, for giving a positive vertical movement to the warp stop motion, other suitable means may be used.

Having thus described my invention, what t claim as new and desire to secure by Let ters Patent is 2- .1u In e Warp stop motion, drop devices, and supports for the warp rests, and means for moving said supports, to cause the worp rests and drop devices to move in coincidence with the movement of the Warp threads.

in e werp stop motion, warp rests, and drop devices, and sup orts Yfor the war rests attached to 'e sha t, to have a` pivote or rocking movement, e cam iever connected with said shaft, and a, driven cum toopernteI said lever, to'csuse the Warp rests and 'drop Idevices to move` in colncidence with the vmove in ,coincidence with the movement of the Warp threads.

JHN REGAN.

relation with the drop devicesv

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