US625191A - And hopedale - Google Patents

Description

No. 625,|9l. Patented May l6, I899 .1. H. NORTHRDP. WARP STOP MOTION FOR LOOMS.

(Application filed Mar. 8, 1899.) (No Model.) E

NITED STATES PATENT OFFICE.

JAMES H. NORTHROP, OF TUSTIN, CALIFORNIA, ASSIGNOR TO THE DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 625,191, dated May 16, 1899. Application filed March 8, 1899. Serial No, 708,174. (No model.)

To all whom, it may concern:

Be it known that I, JAMES H. Nonrnnor, of Tustin, county of Orange, State of California, have invented an Improvement in Warp-Stop-Motion Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the production of means for insuring the uniform and proper operation of the thin flat steel detector-heddles, employed also as actuatingdetectors in warp-stop-motion mechanism, such detector-heddles being shown in United States Patent No. 536,969, dated Ap'ril'2, 1895, wherein the harness or heddle frames are pro vided with detectors of the type specified. In practice such detector-heddles tend to become magnetized and to stick together in groups,

so that in the reciprocation of the frames to change the shed some of the heddles lie behind the others, resulting in impaired quality of the cloth being woven. These objections are overcome and their evil effects prevented by my present invention.

Figure 1 represents in front elevation and centrally broken out a sufficient port-ion of a loom to be understood with my invention applied thereto. Fig. 2 is a cross-sectional view thereof on the line a: 00 looking toward the left; and Fig. 3 is an enlarged perspective view, centrally broken out, of the evening device detached.

The stands A on the loom-frame A provide bearings for the usual overhead shaft a, having sheaves a, to which are attached flexible connections a between the harness-frames, the latter comprising upright side bars I) and top and bottom cross-bars b 6 the bottom bars being connected to the usual actuatingtreadles, (not shown,) and all of well-known construction in the type of warp-stop motion mechanism referred to, as'are also the normally-vibrating feelers f f mounted on the rock-shaftf, Fig. 2, stoppage of a feeler by engagement with an abnormally-positioned detector-heddle operating by or through suitable means (not shown) to'stop the loom upon tained wholly by the heddles, and, as herein shown, said device consists of a rod or bar It, bent at its ends h at right angles to its main or body portion, said ends being longitudinally slotted at b Fig. 3, and with their in ner faces h flattened or planed and in parallelism with each other.

In the present instance the supporting-bar Z) for the heddles is extended through the slots b of the evening device to guide the lat= ter merely, the slots being of much greater length than the depth of the heddle-support b, so that the evening device It has a vertical movement independent of the heddle-suport.

p Between its ends the under side of the evenin g-bar it rests upon the upper ends of the detector-heddles and is sustained vertically wholly thereby, its weight being sufficient to overcome any tendency of some of the heddles to stick up higher than the others, as on the downstroke of the heddle frame the weight of the evener would come more fully upon and would depress any lagging heddles, so that all will be moved in unison.

The evener does not in any way interfere with the dropping of a heddle upon-failure or undue slackness of its warp-thread, as the other heddles at such time will sustain the evener.

Referring to Fig. 1, it will be seen that the evener straddles the series of detector-heddles, the inner faces 71 of the ends h extending outside of and adjacent the fiat faces of the endmost heddles of the series, so that said ends act as side stopsto limit lateral play or movement of the heddles, and thereby pre serve the series in proper upright position.

I-Iaving described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a warp stop-motion for looms, a series of actuating-detectors movable into operative position by breakage or undue slackness of the warp-threads, a reciprocating transverse support for said detectors and relatively to which they have a limited independent vertical movement, and an evening device supported by the upper ends of the detectors to insure normal movement thereof in unison, said evening device having a portion thereof in engagement With and guided by the transverse detector-support and vertically movable relatively thereto.

2. In a warp stop-motion for looms, a series of actuating-detectors movable into operative position by breakage or undue slackness of the warp-threads, a reciprocating transverse support for said detectors and relatively to which they have a limited independent vertical movement, and an evening device extended above the upper ends of and supported by the'detectors, said evening device having its ends turned in parallelism with the length of the detectors and longitudinally slotted to receive the transverse detector-support, to be guided thereby.

3. In a warp stop-motion for looms, a series of detector-heddles each longitudinally slotted near its upper end, a transverse, reciproeating support for and extended through the slots of the heddles, the latter having limited vertical movement relative to said support, and an evener-bar having downturned, longitudinally-slotted ends to receive the heddlesupport and have vertical movement relative thereto, the under side of said bar between its downturned ends resting upon and being supported by the upper ends of the heddles, to insure normal movement thereof in unison.

4. In a warp stop-motion for looms, a series of detector-heddles each longitudin ally slotted near its upper end, a transverse, reciprocating support for and extended through the slots of the heddles, the latterhaving limited vertical movement relative to said support, and an evenerbar having downturned, longitudinally-slotted ends to receive the heddle-support and have vertical movement relative thereto, the bar between its ends resting upon and being supported by the heddles, the inner faces of the downturned ends of the bar being flat and in parallelism, to engage and form side stops for the outermost heddles of the series and prevent lateral displacement of the series.

5. In a warp stop-motion for looms, a series of longitudinally slotted detector heddles each provided with a warp-eye, a transverse, reciprocating support for and extended through the slots of the heddles, the latter having limited vertical movement relative to said support, and an evener-bar sustained wholly by the heddles and having its ends bent at right angles to its body portion, said ends being longitudinally slotted to receive the heddle-support and be guided thereby, the Weight of the ev'ener-bar effecting normal movement of the heddles in unison.

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

JAMES H. NORTHROP.

Witnesses:

GEO. HUNTINGTON, ELIDA A. HUNTINGTON.

Images