US737148A - Shed-forming mechanism for looms. - Google Patents

Description

I PATENTED AUG. 25, 1903. 0. F. ROPB'R. SHED FORMING MECHANISM FOR-LOOMS.

APPLIOATIOK rnnn', 1'23. 24. 190a.

' a sums-sum 1 N0 MODEL.

==EEE PATENTED AUG."25, 1903. c; F. ROPER. SHED FORMING MECHANISM FOR LOOMS.

APPLIOATION FILED FEB. 24. 1903.

2 SHEETS-SHEET 2.v

n.. WASHINGTON, 04 c4 1 like parts.

' Umrmv STATES Patented August 25 190%.

PATENT OFFICE.

cuARLES F. ROPER, or HOPEDALE, MASSAOHUSETT ssieuon To Du ant COMPANY, or HOPEDALE, MASSACHUSETTS, A CORPORATION-0F MAINE.

SHED FORMIN'G MECHANISM FOR LOOMS.

SPECIFICATION forming partof Letters Patent No. 737,148, dated August 25, 1903.

l Application filed February 24, 1903. Serial No. 144,613. (No model.)

the accompanying drawings,is a specification,

like characters on the drawings representing This invention has for its object the produc-- tion of novel, simple, and positively-acting shed-forming inechanismfor looms, the various parts being easy to get at and adjust.

l With the constructionand arrangement to be described hereinafter the use of strapping or other flexible connections is done away with and the lower part of the loom-frame is left open and unobstructed.

The various novel features of construction will be described in the subjoined specifica tion and particularly pointed out in the following claims.

Figure 1 is a partial front elevation cen- 2 5 trally broken out of a'loom with one embodiment of my invention applied thereto. 7 Fig. 2 is a right-hand side elevation of the apparatus shown in Fig. 1; and Fig. 3is avertical sectional detail on the line 3 3, Fig. 1, looking 3o toward the left.

As will more fully appear hereinafter, my present invention is applicable to what is tech nically known as a "twoharness motion,

one harness being raised when the other is 3 5 lowered, and vice versa.

The loom-frame A crank-shaft C, and camshaft O may be substantially of well-known construction, the loom sides having rigidly secured thereto upturned stands A, which take c the place of the usual arch in the present embodiment of my invention. An elongated sleeve-like and horizontal bearing B is adj ustably secured to each stand A, each bearing having secured to orformi'ng part of it a de- 5 pending foot I), bifurcated at its lower end at b and longitudinally slotted at b to receive the shank of a stud-bolt a, extending forward from the stand, a nut a on the bolt clamping the bearing in vertically-adjusted position. Each stand is provided with a forwardly-projecting threaded card which enters the bifurcation Z) of the bearing-foot, and an lipright adjusting-bolt a is mounted in the ear and bears against the foot, as clearly Shown in Fig. 1. By loosening the clamping-nuts a the bearings B, either or both, can-be vertically adjusted by the adjusting-bolts a and brought into proper alinement, as well as raised or lowered to a limited extent; A rockshaft F is mounted in the bearings completely above the harness-frames to be described, one

end of the shaft projecting beyond the bearing (see Fig. 1) and having fast upon it a segment-gear F in mesh with a rack F on 'the upper end of a follower-bar F herein shown as located outside the loom side. Longitudinal ribs f at the sides of therack project over the sides of the gear, and thereby prevent lateral displacement of the rack. v end of' the follower bar is longitudinally The lower slotted at f to loosely receive the cam-shaft O between its bearing-box A, Fig. 1, and a harness-actuating cam C,fast upon the shaft, follower-rolls f and fon the bar F cooperating with theperiphery of the cam above and below its center, rotation ofthe cam re= ciprocatin g the bar and through the rack and gear rocking the shaft F. The cam is so shaped that the harness memberswill'have the requisite dwell in their upper and lower positions to retain the shed open for the pas sage of the shuttle therethrough. A rearward extensionb on the right-hand bearing B, Fig.

2, near the rack F has adj ustably mounted upon it a back-guard I), over which the back of the-rack slides, the guard preventing separation of the rackand'gear. The lower end of the follower-bar is pivotally connected at 5 with one end of a'radius-armB, fulcrumed at its other end on astud 6. on the loom side, 0 the radius-arm preventing the sides of the 'slot from rubbing over the cam-shaftwhen inclined extensions m, terminating in enlarged and thickened feet m laterally ex tended at m to slidably enter vertical guideways g in side guides Gr, rigidly secured to the inner sides of the stands A, the guides G facing each other. Notches m Fig. 3, are made in the front and back faces of the feet on? to receive transverse harness-bars of, two for each frame being shown, said bars being rigidly secured to the feet by bolts 8. Upon each bar of is strung a series of thin fiat steel heddles 7b, which also serve as warp-stopmotion-controlling detectors, so that each harness-frame is herein shown as provided with two banks of heddles. The racks m extend above the shaft F and face rearward and mesh with pinion-teeth f thereon, a rack-guide b on each bearing B extending around the outer face of the rack and preventing its withdrawal from the pinion-teeth. The pinion-teeth f extend around one half of the periphery of the disk f on which they are formed, two such disks being secured to the shaft, and on the other half of the periphery are teeth f but having a greater radius than the teeth f (see Fig. 3) for a purpose to be described. The pinion-hubs are secured to the shaft by set-screws 10, Fig. 1, and they prevent longitudinal movement of the shaft, the outer faces of the disks f being adjacent the inner ends of the bearings I The side bars or extensions m and their connected heddlebars m constitute the front harness-frame,

and manifestly it will be moved up and down by rocking of the shaft F through the pinion l teeth f and meshing racks m the flanges m,

which overhang the sides of the disks f preventing lateral displacement of the racks. The back harness-frame is practically a counterpart of the front harness-frame, except that its racks n face the front, are behind the shaft F, and mesh with the pinion-teethf of larger radius, while the downward extensions n incline forward and terminate in feet 71 to which the heddle-bars n are secured by bolts 12. The feet have lateral extensions M, which slide in upright guideways g in the guides G, said guideways being behind and parallel to the guideways g. Detector-heddles h are hung upon the bars a, as shown in Fig. 1, and back guides b on the bearings B extend around behind the racks and hold them up to the pinion-teeth f. The racks have side flanges n to cooperate with the sides of the disks f and prevent lateral displacement of the racks. \Vhen the shaft F is rocked, the front harness-frame will be raised and the back harness-frame lowered, and vice versa, a single cam C effecting the movement of both frames. Inasmuch as it is necessary to impart a longer stroke to the back harness-frame in order that the shed maybe properly opened, Ihave made the two toothed segments of the pinion-disks f of different radii, the toothed segment f having the greater radius, so that the back harnessframe will be raised a little higher and depressed a little lower than the front frame in order to effect the proper shed formation. Thus diilerential gearing is interposed between the common actuating means and the harnesses to impart to the latter strokes of different length. The side guides Gprevent any lateral movement of the frames and guide them in true and accurate paths of movement when they are reciprocated.

It will be seen that I have dispensed entirely with all strapping, bands, or other flexible connections for effecting the shedding operation, and I obtain a positive directacting movement, which is not subject to variation or inaccurate operation. Furthermore, the connection between the harness-frames is wholly overhead, and the lower part of the loom is left open and unobstructed, the means for actuatin g or rocking the shaft F being located outside of the loom-frame.

My invention is not restricted to the precise construction herein shown and described, as it may be modified or changed in detail without departing from the spirit and scope of my invention.

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

1.. In a loom, two oppositely-movable harness-frames, a controlling-shaft, a rack-andpinion connection between it and each frame, to reciprocate the frames oppositely, said connection including means to impart a longer stroke to one of the frames, and means to rock the shaft to effect such movement of the frames.

2. In a loom, two oppositely-movable harness-frames, each having rigidly-attached, upturned racks facing each other, a controlling-shaft above the frames and between the racks and provided with pinions to cooperate therewith, the back and front pinions having different radii to impart different strokes to the frames, and means to rock the shaft and through the connections reciprocate the frames positively and oppositely.

3. In a loon1,two vertically-movable harnessframes, fixed side guides in which they slide, upturned, rigidly connected racks on the frames facing each other, a transverse shaft located between the racks and havingpinions in mesh therewith, the front frame-pinions being of smaller radius, and means located at the side of the loom to rock the shaft and thereby positively reciprocate the frames.

4. In a loom,two verticallyqn ovable harnessframes each having two upwardly-extended, rigidly-attached racks, the pairs of racks facing each other, a shaft extended transversely between the racks, two pinions fast on the shaft, to cooperate with said racks, each pinion having the segment in engagement with the rear rack of greater radius than the front segment to impart a greater stroke to the rear-harness-frame, and means to rock the shaft, to reciprocate the harness-frames positively in opposite directions.

5. In a loom,two vertically-movable harnessframes, common actuating means therefor to reciprocate them oppositely, and positive, di-

rect-acting differential gearing between said means and the frames, to impart a greater stroke to the back harness-frame.

6. In aloom,two vertically-movable harnessframes, common actuating means therefor to reciprocate them oppositely, said means including a rock-shaft above the frames, and an actuating-cam therefor located outside the loom-frame, and positive and direct-acting differential gearing between the rock-shaft and frames, to impart a greater stroke to the back harness-frame.

7. In aloom,two vertically-movable harnessframes, common actuating means therefor to reciprocate them oppositely, said means including a rock shaft above the frames, vertically-adj ustable bearings for the rock-shaft, and positive and direct-acting differential gearing connecting the rock-shaft and the frames, to impart a greater stroke to the back harness-frame. v

8. In a loom, a cam-shaft, oppositely-movable harness-frames, side guides therefor, an operating rock-shaft having a gear thereon,

gearing between the rock-shaft and thehar ness-frames, to effect the reciprocation of the latter, a longitudinally-movable bar having a rack in mesh with the gear on the rock-shaft and slotted atits lower end to loosely embrace the cam-shaft, a cam on the latter to cooperate with and reciprocate the bar, and a radius arm fulcrumed on the loom-frame and pivot- 35 ally connected with the lower end of the bar, to control the same independently of the camshaft,

9. In a loom, a cam-shaft extended through the loom side and having a harness-actuating 4o ceive the cam-shaft, follower-rolls'on said bar 50' in engagement with the actuating-cam, and a radius arm pivotally connected with the lower end of the follower-bar to prevent it from engaging the cam-shaft.

In testimony whereofI have signed my 55 name to this specification in the presence of .two subscribing witnesses.

CHARLES F. ROPER.

itnesses FRANK J. DUTOHER, CLARE H. DRAPER.

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