US844404A - Selvage-motion for looms. - Google Patents

Description

No; 844,404.' PATENTBD PEB. 19, 1907.

' c. P. ROPBR.

SELVAGE MOTION FOR Looms. AIIPIIGATION FILEDv JUNE 18. 1906.

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No. 844,404. Y PATENTE!) FEB. 19, 190.7.

- Y C. P. ROPBR. t y

SELVAGE MOTION POR Looms.

APPLIOATION FILED JUNE 18- 1906` l2 SHEETS-SHEET 2.

-UNTTED sTATijis PATENT OFFICE.

CHARLES F. ROPER, OF HOPEDALE, MASSACHUSETTS, ASSIGN OR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

sELvAGE-lvloTloN FOR Lo'olvls.

Specification of Letters Patent.

Patented Feb. 19, 190'7.

Massachusetts, have invented an Improvement in Selvage-Motion for Looms, of which lthe 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 a novel selvage-motion for looms separate from and independent of the mainshed-forming mechanism and so controlled and arranged that either a plain or a tape selvage may be woven without removing one set of cams and substituting a different set.

I have herein shown two harness members for the selvage-warps at each side of the loom, each pair being so connected that a positive motion is imparted to oppositely reciprocate the selvage-harnesses, substantially as in United States Patent No. 823,638, granted to me the 19th day of June, 1906. Herein, however, I have provided an actuating-cam for each of the two pairs of selvageharnesses, the cams being of novel construction, in that each is provided with areversible portion, preferably a segment, the one face being provided with a cam path or groove which cooperates with the cam-path on the vmain portion of the cam to form a plain selvage, whilethe other face of the reversible portion is grooved to complete the main campath to produce a tape selvage. It will thus be manifest that when the cams are once set upon the cam-shaft of the loom the mere reversal of the change portions of said cams effects a change from plain to tape selvage weaving, or vice versa. This change can be effected readily and with a very small loss of time, obviating the tedious and troublesome operation of removing one set of cams from the shaft and replacing and accurately timing another set. i

The various novel features of my invention will be fully described in the subjoined specification, and particularly pointed out in the following claims.

I have herein shown the selvage-motion as provided with metallic heddles, which also serve as warp-stop-motion-controlling detectors, substantially as in my said patent, such heddles forming no part of my present invention, however, and the invention is not restricted to their use.y

Figure 1 is a rear elevation, centrally broken out, of a suflicient portion of a loom with one embodiment of my present invention applied thereto. Fig. 2 is afront elevation of the upper part of the arch and the supporting means for the two pairs of harness members. Fig. 3 is an enlarged face view of one of the actuating-cams adjusted for weaving a plain selvage. Fig. 4 is a similar view, but showing the cam adjusted to weave a tape selvage. Fig. 5 is a sectional view on the line 5 5, Fig. 4, looking down; and Fig. 6 is a detail in side elevation of one of the camfollowers and the support therefor.

The arch A of the loom may support in usual manner the main harness-frames, (not herein shown,) and the shaft CX may be the usual cam-shaft of the loom.

In practice the front harness of the main set has a shorter stroke than the one or more behind it, and herein the back selvage-harness of each pair is given a longer stroke in order that the lanes of the selvage-shed may be substantial y in alinement with the planes of the main shed. Two oppositely-movable and vertically-reciprocating harness members for the selvage-warps are arranged at each side ofthe main-shed-forming mechanism.

Referring to Fig. 1, the rods fb andf b, each having a lug l to support one or more heddles 2 for the selvage-warps, constitute the selvage-harnesses or harness members, as in my patent referred to. The overhead connection for each pair of harness members with means to impart a differential reciprocation thereto will be briefly described, only one of such connections being referred to specifically, as the two connections are alike. Two brackets 4, bolted to the lower flange of the arch at proper points, have each parallel bearings transverse to the arch, which support rock-shafts 9 l0, the former being longer and extending forward beyond the front end of the latter to properly position the two selvage-harnesses. A rocker 7 is rigidly secured to the front end of shaft 9, and a segment-gear l1 is secured to its rear end, the rod f being pivotally connected to the said rocker, a similar rocker 8 being secured to the front end of shaft 10 and pivotally connected with the rod t of the back selvage-harness,

while a gear l2 on the inner end of shaft l0 IOC e secured to or formino' partl of it a cr ankarmmeshes with the gear' 11. As in my patent referred to, the gear 12 is of less radius than gear 11i, so that the rocker 8 .Will have the greater amplitude of 'movemenh and the backI selvage-'harness connected therewith will be given the longer stroke. The selvage-v harnesses are suspended from the roc- kers 7 and 8, which positively raise and depress them with a differential movement and -in opposite directions by or through the posin tive connecting-gearing. Each gear 12 has or actuator 15,'provi ed with a crank-pin 16, Fig. 1, whichpasses loosely through an elongatedY slot 17 in a laterally-extended and substantially horizontal arm 18, adjustably secured by set-screws 19 to an adjacent vertica ly-reciprocating rod 20. One of these reciprocating members is located ateach side of theloom, its upper end sliding in a tubular lguide 2l, bolted to the arch, and its lower end having a foot 20X,l bifurcated or forked at 22 (see Fig. 6) to embrace the cani-shaft C and be n guided thereby, enlarged cheekpieces 23 being formedon the sides of the fork to increase the bearing-surfaces and pre vent any twisting of the rods 20, which are practically transmitters'. As the latter rise and fall the crank-arms 15 will be rockedto turnV the rock-shafts 10,- and through the gearing the rock-shafts-Q willbe turned oppositely to thereby effect the desired reciprocation of the selvage-harnesses, as will be manifest. V

e Owing to the long slots 17 inthe arms 18 the brackets 4 can be moved toward or away from the center of the loom a considerable.

distance, thereby providing for lateral adjustment of the selvage-harnesses in weaving different widths of fabric. y

I have pivotally mounted at 24 on each foot 2( X a switch-follower 25, (shown in face view Fig.`6 and crescent-shaped,) the folower rocking on its pivot, so that it can change its angular position with relationto the transmittenfoot on which it is mounted as it follows the cam-path of theactuator or controlling-cam, to be described.

Each actuator is shown as a partly-circular body portion 26, having a hub 27 and of sufficient thickness to receive the cam pathvor groove,v the grooved face of the body being flush with the adjacent end of the hub 27,

while ,a much thinner segmental part 28 rojects fromn the hub at its opposite ends. See Fig. 5.) The endsv 29 30 of the body lie in radial planes anddiverge fromthe hub, such ends, withthe offset part 28, forming a segmental seat, into which fits the removable and reversible part or member 31 of the actuator, secured in position by suitable screws y32. The part 31 is of such thickness that when seated its face will lie flush with the grooved face of the main or body part 26 as shown in Fig. 5. v

l y Referring4 to Figs. 3 and 4, it will be seen that the body portion 26 has on its face an in complete crossed cam path or gro-ovey formed by an inner lobe 33 and an' outer lobe 34 v crossing between the vopposed points 35 36. Both lobes are intersect'ed by the ends 29 30 of the body portion,and the completion of the cam-path is effected by the reversible portion 31. One of the faces thereof has a single cam-groove 37 formed thereon', (see Fig. 3,) and when the portion 31 is in place one end of the groove 37 registers with the inner lobe 33 near the hub, its other end registering with the outer lobe 34 near the pe-A riphery of the actuator on opposite sides of the center, A complete cam-path is therebyy formed substantially heart-shaped, the follower 25 traversing the same as the actuator is rotated by the cam-shaft, imparting to the selvage-harnesses the proper vmovement for a plain selvage-that is, each harness being raised one pick and lowered the following pick. To weave a tape or basket selvage, the part or member 31 is removed, reversed, and replaced, exposing its opposite face, which, as shown in Fig. 4, is provided with two concentric grooves or paths 38 39, the former completing the outer lobe 34 and the latter completing thewinner lobe 33 of the body portion 26. When so adjusted, the switch-follower 25 traverses e first one lobe and then the other, crossing from one to the other between the points 35 36 and giving the two up two down4 movement to each of thek selvage-harnesses in order that the tape or basket selvage shall be made.

The chan-ge from one to the other selvage requires only the lloosening of the fastenings 32 of each reversible member or segment 31, the removal and reversal thereof, land the replacement of the two se ments in their re-` ICO IOS

replaced without any chan je whatever in the main or body portions o either actuator.

Such change is readily made and obviates the necessity of two sets of actuators or cams and the removal of one set andreplacement of the other set lon the cam-shaft, a tedious and dirty piece of work and requiring skilled lal bor to set or time the cams after ythey have been placed Aon the shaft.

The forked ends of the transmitters 20 rise and fall between the faces of the. adjacent ac'- tuators and collars 50 on the, cam-shaft.

e My invention is not restricted to the pre# cise construction and arrangement shown and described, as the same maybe modified or changed in various respects without departing from the spirit and scope of my in#- vention.

v Having described, my invention, what I claim as new, and desirevto secure by Letters Patent, is-

1. In a selvage-motion for looms, in ccm= f bination, two selvage-harnesses at each side of the loom, a connection between and'to cause opposite reciprocation of the harnesses of each pair, two actuators, transmitting means between each actuator and one of the connections, and means on each actuator to cause the said actuators to operate the harnesses to weave plain or tape selvage.

2. In a loom, a shed-forming mechanism for each selvage, combined with a separate actuating device for each mechanism, and means, including a variable member forming a part of each actuating device, to cause said actuating devices to operate the shed-forming mechanisms to weave plain or tape selvage.

3. In a selvage-motion for looms, in combination, two selvage-harnesses at each side of the loom,` a positive connection between and to cause opposite reciprocation of the harnesses of each pair, two rotatable actuators, means on and to vary each actuator to cause plain or tape selvage to be woven, and transmitting means between each actuator and one of the harness connections.

4. In a loom, a rotatable shaft, a shedforming mechanism for each selvage, combined with a reciprocating transmitter operatively connected with each mechanism, and two actuators on the shaft to reciprocate the transmitters, each actuator comprising a main or body portion and a reversible portion, whereby by reversal of the latter portions said actuators can operate the shedforming mechanisms to weave different kinds of selvage.

5. In a loom, a shed-forming mechanism for each selvage, including two positivelyconnected and oppositely-movable harness members for the selvage-warps, and means to cause a differential movement of the connected harness members, combined with an actuator for each mechanism, each actuator comprising a main portion having on its face a crossed and incomplete cam-path, and a reversible portion having on one face a double cam-path to complete the two lobes of the crossed path on the main portion, and on its opposite face a path to complete an uncrossed path, and transmitting means between each actuator and one of said shedforming mechanisms, said means including a follower to traverse the cam-path of the adjacent actuator.

6. In a loom, separate shed-forming mechanism for each selvage, an actuator for each mechanism, each actuator having a removable, reversible portion, whereby a plain or a tape selvage may be woven, and a reciprocating transmitter between eachl actuator and one of said mechanisms.

7. In a loom, separate shed-forming mechanisrn'for each selvage, an actuator for each mechanism, each actuator having a campath thereon, means to vary or change the cam-path to weave plain or tape selvage, a follower coperating with the cam-path of each actuator, and a transmitter for each of said shed-forming mechanisms, the followers being mounted on the transmitters.

8. In a loom, a cam-shaft, two selvageharnesses at each side of the loom, a positive, differential connection between each pair of harnesses, a rocker-arm on each connection, a vertically-reciprocating transmitter operatively connected with each rocker-arm, to operate the same, and an actuating-cam for each transmitter, fast on the cam-shaft, each cam having a reversible segment, the main portion of each cam having incomplete inner and outer lobes of a crossed groove, one face of the segment being grooved to complete both lobes and the other face having a groove to connect one end of the outer lobe with the end of the inner lobe on the opposite side of the center, forming a single, uncrossed path, whereby by reversal of the segments plain or tape selvage can be woven.

9. In a loom, separate shed-forming mechanismV for each selvage, actuating means therefor, including two cam-grooved actuators, and means to vary the contours of said cam-grooves whereby tape or plain selvage may be woven.

l 0. In a loom, separate shed-forming mechanism for each selvage, combined with an actuator for each having a variable cam-path, means to change or vary said cam-paths, a reciprocating transmitter coperating with each actuator, and a rocking connection between each transmitter and one of said shedforming mechanisms.

l 1. In a loom, separate shed-forming mechanism for each selvage, and operating means for each mechanism including a crank-actuator and transmitting means provided with a slotted arm coperating with the crank-actuator, whereby the weaving of different widths of fabric is permitted.

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

CHARLES F. ROPER.

Witnesses:

E. D. BANcnoFT, O. H. LANE.

TOO

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