US2611396A - Let back control - Google Patents

Description

Sept. 23, 1952 RINNE ET AL LET BACK CONTROL Original Filed April 2, 1947 3 Sheets-Sheet l ATTORNEY 3 Sheets-Sheet 2 J. RINNE ETAL LET BACK CONTROL Sept. 23, 1952 Original Filed April 2, 1947 ATTORNEY Sept. 23, 1952 J. RINNE ET AL 2,611,395

' LET BACK CONTROL Original Filed April 2, 1947 3 Sheets-Sheet 3 H. SHTON G. MALLARD GERARD LAKE .BY j

ATTORNEY the take-up gear transmission .unit.

. lines 1-! of Fig.

Patented Sept. 23, 1952 7 LET'BACK CONTROL John Rinne,"Staten Island, N. Y.; Everett H. Ashlton Allston andyfiobert G. Mallard, Hopedale,

..Mass.,.: and; Francis GerardLake,.New York,

N. Y., assignors, by, mesnev assignments, to Steel and Alloy Tank. Company, .Newark,'N. J., a corporation of New Jersey Original application; April 2, 1947,." Serial No.

739,004, now Patent No. 2,518,185,-dated August 8, 1950..;..Divided and this application Feb- 1. wary-3, 1950,; Serial No. 142,203

The present invention relates .to. .a fcloth roll take-up mechanism for looms. and is adivision of application serial No. 739,0(14, filedYApril-l 1947, now Patent Number 2,518,185

In the usual automatic type Yofloom, when the filling is absent by reason of breakage or-zexhaust of the running supply, the takesup. gear transmission is automatically reversedby .the tension of the cloth, to eflect thedesiredJet-baclr-oisaid cloth, and thereby prevent the formationof thin streaks in said .cloth.

One object of the. presentinvention is.to provide new and improved means, effectivelyqcontrolled and operated to limit the extent of. le back of the'take-up roll upon detection of failure of filling, and accessibly mounted for ready inspection, repair or replacements withrespeet-to The take-up roll is usua11y..-mounted-in a. manner to permit its elevation to be adjusted with respect to the warp line, in accordance .with the desired cover of thecloth;

Another object of the present-inventionis to provide new and improved means forrigidly. and firmly mounting the take-up roll-in a manner which will permit the elevationof said roll to be easily, quickly and accurately adjusted withrespect to the warp line.

Various other objects 'of ,the invention .willbe apparent fromthe followingv particular description, and from an inspectionof the accompanying drawings, in which:

Fig. 1 is a front view of theleft-hand side of a loom embodying the features of the; present invention, certain parts of said loom not related to take-up roll 12 in the-"mannerto -be described,

and is frictionally-driven thereby torwindthe the present invention being-absentfromthe view for the purpose of clarity;

Fig. 2 is a side view of the-loom taken app foximatelyalong the lines 22 of Fig. 1. andshowing mainly the gear box for the take-up mechanism and the let-back control mechanism; 7

Fig. 3 is a section of the loom taken-approximately along the lines-3-3.of Fig. .2;

Fig. 4 is a front view of part of the take-up gear box;

Fig. 5 is a section ofthe take-upmechamsm taken approximately along the .lines- 5?5 of Fig. 4;

Fig. 6 is a section ofv the take-upmechamsm taken along lines 6-6 of Fig-.5;

Fig. '7 is a side view of a section of the take-up gear transmission taken approximatelyalongthe 3, andshown with. the take-up roll adjusted in itslower position .accordingto thenature of c1oth.cover. desired;

Fig. 8. is a section of the loom takenapprox-i mately along the lines -8-8-of- Fig. l,-but showing mainly the.pressure-takemp-roll structure, the cloth roll structure andthedrive input end of the take-up gear transmission near the end .of cloth winding operation; I

Fig. 9 is a section of'the take-uproll structure taken approximately along thel-inesdof- Fig. 8; and I 7 Fig. 10 is a detailsection orthebeari-ng-structure atone end of the take-uproll talren on lines Referring to thedrawings,and especiallyto Fig. l, the loom frame may -be-;of--the conventionaltype, butis desirably of the improvedform shown in copending application, '-=SerialNo.

691;.237, filed August-17; 1946, now-Patent-Numsupported on -the-loomsides -in-- a I manner to be more fully described,- and covered-withsandpaper or similar rough surfaced material-adapted to 'frictionallygrip the cloth A afteritis formed and" advance it towardsthe cloth I roll --I 3. *The cloth 'roll I3 is pressed --into contact .-with-.: the

cloth-around said roll -l3. 1

The take-up rolll2-has..secured.to the ends thereof "gudgeons- Wand-l5 (Figs. 1, 9): journalled in suitable bearings on th insideirame Weiss 5310. --One of the gudgeons l 4 on the. left-hand doomside has secured thereto between: the .two: frame webs lfl and H (Fig; 1) a geargltrby whichithe take-up roll 12 is continuously driven as the clothi formed. 'The-take-upzrolhgear:clfiiris 1 driven from the crank shaft of i the loom (not shown), whichextendsparallel to-the'axis of. the

' take-'up-roll I2, andwhich drivesthrough a pair of intermeshing gears not shown) a ShOrt iplCK came-shaft li (Fig. 8) below--said orank shaft on box or casing 25 formed'w-ith a peripheral wallflfi,

extendingthrough an opening 21 in-the-puter frame web H. 'Thegear x15 has amounting 3 flange 30 abutting the outer face of the frame web II around the web frame opening 21, and is closed at its left-hand side by a plate wall 28 secured to said flange 30 and to said frame web II by means of screw studs 3I. The plate wall 28 is provided with a flanged opening 33 closed by a removable cover plate 34 supported in position by means of screw studs 35. The cover plate 34 is in readily accessible osition and can be removed to permit access to the interior of the gear box 25, as for example, for the purpose of changing the speed ratio according to the desired pick. The cover plate 34 is desirably of transparent material to serve as a window, so that the interior of the gear box 25 can be easily observed.

The gear box 25 is provided with a partition wall 31 serving as a frame support for certain of the bearings of the shafts of the take-up transmission traln, and has an outer wall 38 on its right-hand side, serving'as a support for the bearings of some of the shafts of the gear train.

On the right-hand side of the gear box 25 is an extension 40 passing through an opening 4| in the inner frame web I0, and having a mounting flange 42 by which said gear box extension is secured to the gear box wall 38 by means of screw studs 43. The drive shaft 22 passes through the rear wall of the gear box extension 40, is journalled in bearings 44 in said rear wall, and carbearings 48 in the box walls 31 and 38 respectively and has a section of reduced diameter journalled in bearings 5I in the left-hand box wall 28 and passing through said latter wall to the outside of the gear box 25. The outer end of the reduced shaft section carries a hand wheel 52 for .to the take-up main drive shaft 41 between the two gear box plate walls 31 and 38 which drives the gear arrangements enclosed in gear box 25. Said gear arrangements include the drive gear 91 affixed to the projecting part of the countershaft 94 which is supported in bearings 95 and 96 in the walls 31 and 38 respectively. The gear arrangements enclosed in gear box 25 and their mode of operation will not be gone into here as such gear arrangements are not the basis of the claims of this application and are fully described in the parent application Serial No. 739,004, now Patent Number 2,518,185, above referred to. The drive gear 91 meshes with an idler gear 98 which is in mesh with the take-up roll gear I6, and is secured to an idler shaft 99 journalled in a bracket I00. The bracket I00 is supported for rotatable adjustment about the countershaft 94 to maintain the idler gear 98 in mesh with the take-up roll gear I6, irrespective of the elevation of said latter gear.

Means are provided for positively lubricating the gear transmission in the gear box 25, and for that purpose, the drive shaft 22 carrying the takeup worm drives a lubricating oil pump I05 mounted in the gear box extension 40 on the front wall thereof. The lubricating pump I05 is shown of the gear type, and comprises a pair of meshing gears I05, serving as the pumping members, and one of which is fixed to the shaft 22 so as to be driven thereby. The pump I05 has an intake I01 leading from the sump section I0Ia of the gear box 25, and has an outlet I08 connected to a piping system I09 distributing oil to the different rotating members of the gear transmission. The oil distribution piping system I09 may be of any suitable type, and may have a manifold H0 at its upper end provided with openings for projecting the oil-downwardly from the top of the transmission. The oil from this manifold H0 will find its way through the different rotating parts of the transmission and back into the sump Io1a.

Withtheconstruction described, the box enclosed take-upgear transmission will be protected against lint, threads, waste and other foreign substances. Moreover, with this encased construction, lubrication of the gears and bearings is effected efl'iciently without creating an untidy,

oily mess around the loom. Furthermore, the transmission structure being self-contained, it can be mounted or demounted-with respect to the loom frame easily and quickly as a unit.

The transparent window 34 in the gear box 25 permits observation of the inside of said gear bo so that the condition of the lubricating system in operation can-be observed. It is also possible to determine through the transparent window 34 the pick setting of the loom from the position of the pick change gears. and from the number of teeth thereon, which would be marked on the gear.

The construction of the present invention is provided with means for driving the take-up mechanism in the reverse direction to the extent required to efiectthe desired let-back whenever there is an absence of the filling, as a-result, for example, of the breakage or exhaust of the running filling supply. To that end, or for the purpose of manually pulling the cloth ahead or back, as is necessary in the initial starting of the loom or positioning the fell of cloth, there is a clutch III in the take-up transmission automatically disengaged upon detection of a failure in the filling. The clutch III is of the ratchet tooth type, and comprises a clutch element H2 fixed to the take-up worm wheel 46, and meshing with a complemental clutch element H3 feathered on the take-up main drive shaft 41 for slidable movement therealong. The take-up main drive shaft 41 is of a sectional type, and comprises a main hollow section I I4 on which the clutch member I I3 is splined, and a'section I I5 journalled in the hollow of the main shaft section I I4, and secured at one end to the worm Wheel 46.

The clutch element H3 is yieldably urged into drive engagement with the clutch element H2 by means of a coil spring I I1 embracing the main shaft section I I4, and hearing at one end against a shoulder or collar M8 on said shaft section, and at its other end againstsaid clutch element H3. V

The disengagement of the clutch I II is effected automatically upon detection of a deficiency in filling by means of a filling feeler slide mechanism H9 which may be of the usual type,- and which is operated when the filling breaks, or when the filling is being replenished, to move a rod I20 on the inner side of the inside frame web I0 downwardly. The rod I20 is guided for slidable movement and urged upwardly in an inoperative position by means of a spring I2I seated on one of the slide sleeve guides I22 ffixed to th inner face of the inside frame web I0, and bearing against a collar I23 secured to said slide rod I26. The slide rod I carries a I blockv I24 which engages on its lower side one end of a cam lever I25 pivoted at I26-to the front wall ofthe gear box extension 44 and which is adapted to engage on its upper sidein'the upper limiting position of said slide rod a sleeve rod guide I23 affixed to the inner face of theinside frame web I6. The other end of the lever I25 has a cam conformation I21 engaging a cam follower I28 secured to a rock shaft I30 journalled in the front and rear walls of the gear box extension 46, and carrying inside saidextension a fork. I3I engaging the clutch element H3; and serving-to shift'said member-outof engagement with the clutch element I'I2- when-the sliderod I20 is depressed, either upon filling transfer action, the breakage-of the filling, or for manual operation.-

The slide rod I26 is automatically: operated from the filling slide mechanism H9; or may be manually operated'by means of afoot pedal I32 integral or otherwise secured to the collar I23.

Upon the automatic or manual disengagement of the clutch III in the manner described, the tension of the cloth A' will cause a reverse drive or let-back of the transmissionbeyond saidclutch III without interfering with the rotation of the drive shaft 22 and the intermeshing gear members 45 and 46 thereby.

To control the amount-of let-back, the part of the drive shaft 41 extending outwardly through the left-hand wall 28, has aflixed thereto a ratchet wheel I cooperating with a pawl or detent I4! pivotally mounted at I42 to an arm I43 supported on said main shaft-41 for swinging movement thereabout. A spring I45 secured to the arm I43 urges the pawl I4I into engagement with the teeth of the ratchet wheel I46. The lower end of the arm I43 extends into a slot formed between a bracket I46 and the wall 28 to which said bracket is affixed. A series of holes I41 are provided in the bracket I46 for receiving a slack control stud or pin I48.

During normal running operation of the take- 1 up transmission, the ratchet wheel I40 is rotating clockwise as shown in Fig. 2, so that this ratchet wheel rides idly past the pawl or detent I4 I. During this rotation, the frictional engagement of the hub of the arm I43 with the drive shaft 41 causes the rotation of said arm, until in limiting position it strikes the end of the bracket I46, as shown in Fig. 2, so that the rotative position of said arm, and in turn, the position of the pawl MI, is predetermined during normal operating conditions. Upon disengagement of the clutch III, the tension of the cloth causes a reverse rotation of the transmission beyond said clutch, and in turn, causes the ratchet wheel I40 to rotate counterclockwise (Fig. 2). This rotation of the ratchet wheel causes the engagement of said wheel with the pawl I4I, and in turn, moves said pawl and the arm I43, until said arm strikes the stud I48 disposed in one of the holes I41, according to the amount of let-back desired. When this arm I43 reaches this limiting position, further reverse rotation of the transmission is stopped.

If it is desired to manually reverse the transmission beyond the clutch III, this can be easily effected first disengaging clutch III, lifting pallet I56 and by manipulation of the hand wheel 52 in a counterclockwise direction. The counterclockwise rotation of the hand wheel causes the transmission to rotate in a reverse direction.

The extent of let-back permittedthrough the hand wheel 52 may becontrolled independently of the ratchet and pawl device I46. and III! by merely moving the pawl I4I.out*of engagement with the ratchet wheel I46, while; said hand wheel is-being rotated. To facilitate; this manipulation of the pawl I4I, said pawl has. integral or otherwise rigid thereto a handle. extension I56.

As another feature of thepresentinvention, the take-up roll I2 is mounted in bearings in the inside frame webs In in such a-manner asto permit'said roll to be verticallyadjusted'with respect to the warp line. This elevational adjust,- ment is effected for the'purpose well-known in the art; For example, in orderyto produce. cover or a'full appearance in the, cloth,- the :take-up. roll I2 would be raised, and if the warp-is tender, it may be desirable to placesaid roll in a lower position, to produce lessstrainpon the-warp threads.

For roll adjusting purposes; each of the, bear:- ings for the gudgeons Isiand I5. ofthe takeeup roll 'IZ'oomprises an eccentricbearing housing 536 (Figs. 9 and 10) defining achainber for an anti-friction bearing unit I6 I. The bearin housing I63 has a cylindrical section I62 which passes through an opening I63 :inthe frame web it with a snug rotative fit, and which is. provided at itsouter end with aradially. outward flange I64 abutting the outer face of :said frameweb. The inner. end of the bearing housing I55 is closed by a cover I65, which .is fastened to said housing by bolts I63; and which has a cylindrical section I61 similar to and abutting, the cylindrical section I62 of said bearing housing I69. and a radially outward flange I68. Secured to the inner face of the frame, web, I 6 by welding or the like is a shim plate Iliihaving a circular opening I'II of the same, size as and in registry with the opening I63 in the frame web Ill. The

shim plate I16 extends around; the cylindrical sections I62 and I-61 of the bearing housing I66 and its cover I65, and is engaged by the flange I68 on said cover. The openingein bearing ,housing I66 and its cover I65, through which the gudgeon I4 or IE extends, iseccentric with respect to the cylindrical sections I62 and I61 of said members, so that upon adjusting rotation of said cylindrical sections in the aligned openings I63 and HI of the frame web I0 and shim plate I10, the elevation of said gudgeon will be varied.

The eccentric bearing housing members I66 and IE5 are maintained in adjusted rotative position by means of a clamp I12 removably secured to the frame web I6 and to the shim plate I16 by means of a cap screw or stud I13, and having a lip I14 bearing against a peripheral section of the bearing housing cover I35 in tightened position of said clamp.

When it is desired to adjust the elevation of the takeup roll I2, the studs I13 at each end, are loosened to release clamping pressure on the bearing units I60, I65, and said units are rotated in the openings I63 and ill to change the elevation of the gudgeons I4 or I5, and in turn, the elevation of said take-up roll I2. Thetwo eccentric bearing units I66, I65 on opposite sides of the take-up roll I2 are adjusted to the same extent as determined, for example, by a spirit level, and when said roll has been elevated to the desired position, said bearing units are clamped in ad- 7 justed position by tightening the clamp studs I13.

As the elevation of the take-up roll I2 is adjusted, the elevational position of the take-up roll gear I6 with respect to the idler gear 98 is also changed. It is therefore necessary to move the idler 98 into mesh with the take-up roll gear IS in its adjusted position. For that purpose, the idler 98 is carried on the adjustable bracket I supported on the countershaft 94 of the takeup gear transmission for rotatable adjustment thereabout. The bracket I00 includes two plates I80 and I8] secured together by means of bolts I83 passing through spacer sleeves separating said plates, and is held in adjusted position by means of a clamp I84 bearing against the bracket plate I89 and fastened by a screw stud I85 to the righthand wall 38 of the gear box 25. By loosening the stud I85, and thereby loosening the bracket I00, said bracket may be rotated to bring the idler gear 38 into mesh with the take-up roll gear [6, irrespective of the elevation thereof.

As many changes can be made in the above apparatus, and many apparently widely different embodiments of this invention can be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In a take-up mechanism for a loom, a take-up gear transmission including a take-up main drive shaft, and a drive to said shaft including a clutch disengageable to permit letback operations under the tension action of the cloth, a casing for said transmission on one side of the loom, said take-up main drive shaft extending in said casing andprojecting outwardly through the outer side wall of said casing, and a let-back control device on the outer side of said outer casing wall adjustable to control the extent of cloth let-back and comprising a ratchet wheel on the outward projecting section of said take-up main drive shaft.

2. In a take-up mechanism for a loom, the combination as described in claim 1, in which said clutch is of the unidirectional type automatically disengaged upon rotation of said takeup main drive shaft in let-back direction, said combination including a handle on the outward projecting section of said take-up main drive shaft'manipulable to effect reverse rotation of said latter shaft, said let-back control device being adapted to be manipulated into inoperative position to permit let-back operation through said handle independently of said let-back control device.

3. In a take-up mechanism for a loom, a takeup gear transmission including a take-up main drive shaft and a drive to said shaft including a unidirectional clutch automatically disengaged upon rotation of said drive shaft in let-back di rection, and automatically disengaged upon detection of absence of filling to permit let-back operations under the tension action of the cloth, a casing for said transmission on one side of the loom, said drive shaft extending in said casing and projecting outwardly through the outer side wall of said casing, ahandle on the outward projecting section of said drive shaft manipulable to effect rotation thereof, and a let-back control device on the outer side of said outer casing wall operating on said drive shaft to control the extent of cloth let-back and manipulable into inoperative position to permit let-back operation through said handle independently of said letback control device.

JOHN RINNE.

EVERETT I-I. ASHTON. ROBERT G. MALLARD. FRANCIS GERARD LAKE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 7 Date 743,584 Stimpson Nov. 10, 1903 1,647,234 La Chapelle Nov. 1, 1927 1,794,420 Robellard Mar. 3, 1931 1,911,981 Wiget May 10, 1933 2,185,063 Pugh Dec. 26, 1939 2,533,128 Mallard et a1. Dec. 5, 1950

Images