US626412A - Warp-stop-motion detector for looms - Google Patents

Description

Patented June 6, I899.

G. O. ORAPER. WARP STOP MOTION DETECTOR FOR LOOMS (Application filed Sept. 92, 1898.)

(No Model.)

THE uonms PEYERS 00,. Pnoruumm WASNINGTON. 04 c.

UNinn STATES PATENT FFICE.

GEORGE O. DRAPER, OF HOREDALE, MASSACHUSETTS, ASSIGNOR TO THE.

DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-MOTION DETECTOR FOR LOOMS...

SPECIFICATION forming part of Letters Patent No. 626,412, dated June 6, 1899.

Application filed September 22, 1898. Serial No. 691,573. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE O. DRAPER, 0t Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in WVarp-Stop-llotion Detectors for Looms, &c., of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

VVarp-stop-motion mechanisms for looms and some other textile apparatus are frequently made to operate upon the abnormal positioning of a detector-a device or member which is controlled as to its position by one or more warp-threads--a series of such detectors being employed in accordance with the number of warp-threads.

\Vhile the warp-threads are intact or maintained under proper tension, the detectors are held in inoperative position, a detector moving into abnormal or operative position upon failure or slackening of its controlling Warp thread or threads, and the stop-motion mechanism then acts to automatically stop the apparatus.

In looms for weaving the detectors may be arranged and located entirely independent of the shedding devices, or the detectors may be also utilized as heddles in the harness-frames, as in United States Patent No. 536,969, dated April 2, 1895, the result of their cooperation with the stop-motion mechanism effecting the the same result in either caseviz. automatic stoppage of the loom.

The detectors are conveniently and preferably made of thin flat sheet metal stamped out or struck up into the desired shape and provided with a closed slot through which is extended a supporting-bar which sustains a detector when in abnormal position and freed from the control of its warp-thread, the slot being longer than the depth of the bar in order to permit a relative vertical movement of detector and bar. iVhether this bar be a fixed support or forms a part of a harness-frame it is very desirable that a detector may be applied to or removed from the bar without disarrangement of the other detectors or removal of the bar, for it often happens that after a warp is drawn in an extra thread is found on the beam, and this thread must be either crossed over to the end of the supporting-bar, where a new detector can be most readily applied, or a detector must be inserted in the proper place in some other manner.

My present invention has for its object the production of a novel detector which may be applied to or removed from the supportingbar at any point with the greatest ease without any disarrangelnent of either the bar or the other detectors of the series.

Figure 1 represents in longitudinal section a sufficient portion of a loom to be understood with one embodiment of my present invention applied. thereto,the detectors also serving as heddles in the apparatus chosen for illustration. Fig. 2 is an enlarged side elevation of a detector embodying my invention, and Fig. 3 is a similar view of a modified form of detector.

Referring to Fig. 1, the side bars a Z) of the harness-tram es are rigidly connected by transverse bars a a 1) b the frames being reciprocated in usual man ner-as, for instance, by the mechanism shown in the patent referred toand provided with a flexible overhead connection a*. Vibrating feelers ff cooperate with the detectors d (shown in Fig. 1 as mounted on the cross-bars of the harnessframes, as will be described,) the devices between the feelers and the stop-motion mechanism and such latter mechanism not being shown herein, as they form no part of my invention.

The detector d is preferably stamped from thin sheet-steel in tape-like form. It may be of the width desired for the detectors, the completed detector having parallel longitudinal edges 3 3, Fig. 2, and usually a warpreceiving eye d.

My detector shown in Figs. 1 and 2 is adapted to be applied to either one or apair of supporting-bars, and in order to secure such adaptation the detector is provided at or near each end with an open slot d, extending in the direction of the lengthbf the detector and having its entrance d at one of the longitudinal edges thereof. The entrance d to the slot is shown as located between the ends of the slot, and adjacent theinner ends, forming an open supporting hook, the tongue d3: of which lies within-theboundaries-of the de-a tector.

of thejentrance thereof, so that the bar will have a bearing when depressing thedetector,

as when the harness-frame is in the lower part of the shed, and to prevent accidental disen j;

" gagement of the detector and its bar.

The entrance d -is made narrower than the depth of the-supporting-bar, as shown by dotted lines, Fig. 2, to prevent accidental displacement of the detector when inposition on theobar.

To-applya detector to'a single har, the former'i's ti'pped to slide the hook over the'bar,

andwhen the bar i's inthe 'slot the detector is moved back intovertical position, asshown inFig..11, removal 'of'the detector loeing ef-' fected bya reversal ofthe movements above set forth. mlt-willthns be obvious that a de- 1 tector'may'be -applied to a bar-at anypoint witho'ut'in'anyway disarrangi'ng or changing the position=of the bar or'detaching it'from its supports. V

When a' detector is to be'applied to two b'ars,1a's tofa harness-frame"such as shown in Fig. 1,""the detectorisapplied to one i bar,-'as- 'describe'ch'and then the. tongue of the "hook at the other-end of the detector isrdefle'cted sufficiently to "permit-entrance of the other bar intothe" slot forining'the hook, t-h'e fleXi bility'and resiliency- 0f the material, of the; detector permitting such deflection without i iry- I v Sofariasthe'position'of the entra-n'ce'tothe hookforming slot (1 is concerned, it'is not-re-J striated -tothe*position shown provided-that "sai'd entrance extends from the longitudinal edge of' the 'detectorto the slot.

fonnse with twosnpportingbars 0' c the'oppesitely"and-inwardlyturnedhooks h bein g formed by elongatedslots h, having their en tran'ee's Wat the inner ends of theslots, which diverge from the hooksfh so that the entran'ces in the longitudinaliedge of thedeteetor' converge to the width of theslots, while in the formof detectorshown in. Figs. 1 and 2 the entrances d diverge from their-mouths to the slots. T-wo bars are thusn'ecessary with the detector shown 'in Fig. 3, the upper bar elevating and the lower bar depressing the detector, said bars when operating en gaging the outer ends of the slots.

The detector h is applied to or removed Having fully described my invention, what Ijclaim, and desire to secure by Letters Patent, i s* from'thebars in a'm'an'ner similar to that described for the detector d w 1. As a new article of manufacture, a warp stop-motion detector made from fiat, metal tape 'havin g a-warp-eye and provided with an open hook the entrance to which is at the side and'narrower than the length of the slot forming the hook, saidslotextending beyond the entrance thereof atbothen'cls.

2. "A loom harness-frame having'a -trans'- r 3. -A-loom harness-frame having two trans- "verse, parallel bars, and a series of flat detector-heddles mountedth'ereon, each heddle having at or neareach-end a longitudinal slot provided with a side entrance leading from the edge of the heddle, the'distancebetween fiat metal having a warp-receiving opening and provided at or near each end with-an v 7 f *elon'gated'slot each having a side entrance -"1 he' detector 7v'sl1'ownin Fign3 is intended narrower than the length of the slot, each slot extending beyond -its entran'ce at both ends" thereof. p

In testimony whereof I have signed my name to this specification in the presence-of two subscribing-witnesses.

- GEORGE OJDRAPER. Witnesses:

E. D. BANoRoFT, =ALBERT "H. COUSI'NS.

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