US1904338A

US1904338A - Reversing multiplier

Info

Publication number: US1904338A
Application number: US554665A
Authority: US
Inventors: William M Wattie; Karl S Whitten
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1931-08-03
Filing date: 1931-08-03
Publication date: 1933-04-18
Anticipated expiration: 1950-04-18

Description

April 13, 1933. wATTlE ET AL 1,904,338

\REVERSING MULTIPLIER Filed Aug 1931 4 Sheets-Sheet l I Jnxfentorns Uflliarq Uaitie Kafl iwmtten PIE 1 ttor'ncq's 1933' w. M. WATTIE ET AL REVERSING' MULTIPLIER Filed Aug. 5, 1931 4 Sheets-Sheet 2 =9nxfentor$ Uima TR wattle Karl E) April 18, 1933. w. M. VYATTIE ET AL v I 1,904,338

REVERS ING MULT IPLI ER Filed Aug. 5, 1951 v 4 Sheets-Sheet 3 Smfentors q Uimam mmfattie. KAN S. Umtten M f Qttornegs p i 8 1933- w. M. WATTIE Em 90 ,338

REVERSING MULTIPLIER 4 Sheets-Sheet :4

Filed Aug. 5, 1931 Snflentors Mifliam m Hattie Karl 5. hlnitten attorneys i along the line Q' -2 in Fig. 1;

Patented Apr. 1 8, 1933 Io-mun *fs 1-t sis PATENT OFFICE. A

wI I M ATrIE. or" woRonsrEmANn KARL s. HI'rr N, or AUBURm Ass cnusn'rrs, ASSIGNQRS ro cnoiurron &. NOWL S LOOM wonxsor woRoEs'rEn,

,' MASSACHUSETTS, A oogaronArronor MASSACHUSETTS nnvnnsrive MULTIPLIER Application filed August a, 1931. Serial No. 554,665.

. This invention relates to mechanism for controlling the Operation of a pattern chain in a dropbox loom. While capable of general application, therinvention is particularly designedforuse in connection with a dobby of the type which is known commercially asza Knowleshead. t p 1 It isthe object of our invention to provide a multiplier of improvedand simplified construction, by which a box chainmay'be-reversed whenever desired, andby which the indication of any selected chain bar may be repeated a predetermined number of times. 'We also provide a multiplier in which the multiplying mechanism is operative-inboth directions ofmovement of the multiplier;

A further object of'the invention is to provide-a multiplier which is adaptedto bereadily applied to looms of the Knowles head type whichare already built and in operation. Our invention further relates to arrangements and combinations ofparts which will be hereinafter described and" more particularly poin'tedout in the appended claims. I A preferred form of the invention is shown in the drawings, in which I I Fig. 1 is a side elevation of our improved multiplier; I

Fig. 2 is a sectional front elevation, taken Fig. 3 isfla'detail View showing the gear drive and looking in the direction of the arrow3inFig.l; e

' Fig. 4' is a plan view of ourimproved multiplier, looking in the direction ofthe arrow 4inFig.1; Fig. 5fis a se tional side elevation of certain parts'taken substantially along the line '.5'in Fig. 4', and j Fig. 6 is a sectional end elev ation,-taken along the' line 6 6 inFig. 4.

Referring to Fig. 2; we have shown our im proved"inultiplier' as mounted upon a drop boxloomhaving a Knowles'headfor operating the. drop boxes and'the harnesses, We

have shown a portion ofthe dobby frame 10, one of the cylinder gears 11, and one of the vibrator gears 12, pivoted at 13130 a'vibrator lever 14 mounted to swing about a fixed cross bar or shaft 15. The vibrator gear 12 is connected by a link 16 to control the usual mechanism by which the drop boxes are raisedand lowered. All of these parts are of the usual construction and form no part-of our present invention.

The dobby'frame -as commercially constructed haspreviouslyv been provided with a-bearingsurface 17 which is well adapted'to 1 receive our improved multiplier and'to which the multiplier may be attached without involving any structural changes in the dobby or-Knowles head as previously manufactured and sold.

a Our improved multiplier comprises end frames-20 and 21 (Fig. 4) connected by one or more'cross rods 22 and by, across girt 23. The frame members 20 and 21 may be clamped to the surfaces 17 of the dobby frame 10 by bolts 24 and the multiplier may be readily attached. or removed as desired.

Our lmproved mult1pl1er comprises abox- 7 in timed relation thereto. The driveshaft v '36 is driventhrough a gear 41 whichv meshes directly with the gear 39 previously de-- scribed. NVith these. connections, the-shafts and 36willbe continuously rotated at equal speeds but in opposite directions.

i one-toothed driver or pin gear--44 (Fig. 1) isslidable on the shaft 36 but is keyed or otherwise secured-thereto, soas to be continuously rotated-thereby. A similar pingear-or driver 45 is slidable on the shaft 35' ancl is also continuously rotated thereby.

The hub of the pin gear 44 is grooved to receive a yoke arm 46 on a collar 47 slidable on a fixed stud 48. The pin gear 45 is similarly grooved to receive ayoke arm .49 (ma. 1.

hub 50 slidable on a fixed stud 51.

The

hubs

47 and 50 are grooved to receive opposite ends of a lever 52, mounted on a fixed pivot 53 and having a laterally projecting arm 54 connected by a link 55 to a lever 56 pivoted on the cross bar 22 previously described.

As the lever 56 is raised or lowered by the reversing chain It, the lever 52 is shifted to move one or the other of the

pin gears

44 or 45 into position to engage and drive a star wheel 60 on a drive shaft 01. Consequently the drive shaft 61 is advanced step by step as the loom is operated but the direction of retation is controlled by the reversing chain R. A spring 57 normally maintains the parts in the position shown in Fig. 1, with the pin gear 44 in position to engage the star wheel 60.

The pattern or box chain B (Fig. 1) controls a plurality of levers 63 which are connected by links 64 to the vibrator levers 14 previously described and which thus control the operation of the drop box mechanism. When our improved multiplier is in use, it is customary to omit the usual box chain in the dobby, using the dobby to drive the harness chain H (Fig. 1) only, said chain being mounted on the usual harness chain cylinder also indicated in Fig. 1. This cylinder is in termittently advanced in one direct-ion only by the usual driving mechanism as shown for instance in the prior reissue patent to Knowles #7,784, dated July 3, 1877.

The box chain B also controls the positions oftwo additional levers and 71 which are connected as will be described to determine the operation of the reversing chain R- and the multiplying chain M.

The box chain B is provided with a star wheel 72 (Fig. 4) and is rotated by a pin gear 73 slidable on the drive shaft 61 but keyed or otherwise secured for rotation therewith. The gear 73 is provided with a plurality of pins 74, each of which is adapted to engage and advance the star wheel 72 associated with the box chain B. The gear 73 is positioned axially by a yoke forming a part of an arm 7 5 secured to a sliding bar 76. A spring 77 (Fig. 5) tends to disengage the gear 73 from the star wheel 72.

A bell crank lever 78 (Fig. 5) is pivoted at 79 on a bracket 80 supported by the cross girt 23. The depending arm of the bell crank 78 engages the end of the sliding rod- 76, and the horizontal arm of the bell crank is connected by a link 82 to a lever 83pivoted on the cross rod 22 (Fig. 4) and extending over the multiplying chain M.

As the lever 83 is raised by a ball on the chain M, the arm 75 will be moved to the left in Fig. 4 and the pin gear 73 will engage the star wheel 72 and intermittently advance the box chain B.

The sprocket 31 for the multiplying chain M is provided with a star wheel 90 (Fig. 4) adapted to be engaged by a pin gear 91,

rotatable with but slidable on the drive shaft 35 and positioned by a yoke arm 92 secured to a sliding rod 93 (Fig. 5). A collar 94 on the rod 93 is engaged by a bell crank 95 mounted on a fixed pivot 96 and connected by a link 97 to a lever 71 previously described. Asprmg 98 moves the rod 93 yieldingly to the left.

The sprocket 32 (Fig. 4) for the reversing chain R is provided with a star wheel 100, adapted to be engaged by a pin gear 101 rotatable with but slidable on the drive shaft 35, and positioned by a yoke arm 102 secured'to the end of a sliding rod 103.

A collar 104 on the opposite end of the rod 103 is engaged by one arm of a bell crank lever 105, pivoted at 106 and having its other arm connected by a link 107 to the lever 70 previously described. A spring 108 engages a collar 109 on the rod 103-and yieldingly moves the rod to the left in Fig. 5, holding it in engagement with the bell crank 105., 7

Having described the details of construction of our improved multiplier, the method of operation thereof is as follows:

As previously stated,the pingears 44 and 45 (Fig. 1) are continuously rotated in opposite directions through the train of gears shown in Fig. 3 and are alternately rendered operative by movement of the three-armed lever 52.

Gon. sequently, the drive shaft 61 will be given intermittent movements at regular intervals and in timed relation to the rotation of the dobby cylinder gears 11, but these intermittent movements of the drive shaft 61 will be in either direction, according to the position of the lever 52.

Under normal operating conditions, a ball on the multiplying chain M will be positioned under the lever 83, thus holding the pin gear 73 in position to engage and intermittently advance the star wheel 72 connected to the sprockets 30 which support the box chain B.

Also under normal conditions, a sinker on the reversing chain R will be positioned under the lever 56, which will cause the pin gear 44 to engage the star wheel 60 and will cause the box chain B to be moved in the normal direction indicated by the arrow ain Fig. 4.

Sinkers on the box chain B under the

levers

70 and 71 will permit the pin gears 91 and 101 to be moved to inoperative positions by the sprin s 98 and 108. Conseuently, so long as SlIlTieI'S appear under the

levers

70 and 71, the multiplying and reversing chains will remain fixed in position and the box chain B will be intermittently and regularly moved in a forward direction to shift the box levers 63 according to the'make-up of the box chain.

If it is desired to repeat the indication of a particular bar of the-box chain B, a ball is. placed on this particular bar in position to raise the lever 71. Such movement of the lever 71, acting through the connections stops the feed of the reversing chain R, hold- :W the lever 70, whereupon the reversing chain wheel 90 and the multiplying chain M.

The box chain B will be held stationary as long as sinkers on the multiplying chain M continue to appear under the lever 83, and further movement of the box chain B will not take place until the next ball appears on the multiplying chain. The indicated bar of the box chain B may thus be repeatedly indicated as many times as desired by placing successive sinkers'on the multiplying chain M, and

the repeat will be terminated by the appearance of a ball or riser on the multiplying chain M.

All feeding movements of the box chain B a will be in the forward direction so long as sinkers are used under the lever 70. When a ball appears under the lever 70, the lever acts through the connections shown in Fig. 5 to shift the pin gear 101 to operative position, in which it engages and advances the star wheel 100 and the reversing chain R.

If a ball on the chain R then appears under the lever 56, this lever acts through the reversing lever 52 to shift the driving connections for the star wheel 60 on the drive shaft 61 and thereby cause the drive shaft to be rotated in the opposite direction. The box usual by the pin gear 7 3 but in the backward rather than the forward direction.

The first reverse movement of the box chain B brings a sinker under the lever 56 and thus ing the lever 52 in reverse position. The intermittent feed of the box chain B in the backward direction will continue until another ball appears in the box chain B under R will be moved one step in the direction of the arrow 6 in Fig. 4.

If this movement of the chain R causes a sinker to appear under the lever 56, the lever 52 will be shifted and the box chain B will begin to move in the forward direction, but if another ball instead of a sinker appears under the lever 56, the box chain B will continue its backward movement.

It will thus appear that we have provided relatively-simple multiplying mechanism by which the pattern or box chain may be moved intermittently in either a forward or backward direction and by which. the indication of any selected box chain bar may be'repeated any desired number of times. Furthermore, it Will be noted that the multiplier may he used when theibox chain is beingmoved in either direction, which is adistinct advantage not possessed to our knowledge byany previous multiplying; mechanism. V The entire; multiplier is-compactly arranged .as a unitary structure which; may be readily attached to a commercial dobby or Knowles head and which maybe as-re'adily'removed when the use thereof is 1 not desired.

I Preferably. also we provide a detachable driving connection 120 in the geartrain, so that the. multiplier may be temporarily thrown out of action but will be in exact timed relation when itis again connected.- I 1 Having thus described our invention and the advantages thereof, we do not-wish to be limited to the details herein disclosed, other.- wise than as set forthin'the claims, but what we claim is I 1. In a'drop box loom having a plurality of harnesses and a dobby having a pattern chain controlling said harnesses, incombination, ,a multiplying mechanism mounted on and abovesaid dobby and having a'pattern chain controlling said drop boxes, and means to intermittently feedsaid chain in timed relation to the movements of the harnesses. 1 2. In a drop box loom having aplurality of harnesses and a dobby having a pattern chain controlling said harnesses, in combination, a multiplying mechanism formed as 'a unitary structuresupported by'and above said dobby and having a pattern chain controlling the-dropboxes, and means to intermittently feed said' chain in timed relation tothe movements of the harnesses. e

3. In adrop box loom having a plurality of harnesses and a dobby having a pattern chain controlling said harnesses, in combination a multiplying mechanism-mounted on and above said dobby and; having a pattern chain'controlling the drop .boxes, means to intermittently feed said box chain, means to repeat a selected indication of said box chain a predetermined'numberof times, and means to reverse he direction of intermittent f (1- ing movement of said box chain.

4:. A multiplying mechanism for a. drop boxlooml comprising a box chain, means to intermittently feed saidv box chain forward or backward, pattern mechanism 'to'deter; mine the direction of feed, andpattern-mechanism to cause a selected indication of said box chain'to berepeated a'predetermined the direction of feed, and patternmechanism to cause a selected indication offsaid-box c em. ells ep a d; ars term n d 1mmber of times when said box chain is being fed in either direction. 6. A multiplying mechanism comprising a box chain, a multiplying chain, a reversing chain, a non-rotatable supporting shaft, a separate driving cylinder for each chain, mounted for independent rotation on said shaft, a driving shaftfor said multiplying and reversing chain cylinders, a second driving shaft for said box chain cylinder, means to intermittently rotate said first driving shaft in one direction only, means to intermittently rotate said second driving shaft in either of two directions, and pattern controlled means for determining the'direction of rotation of said second shaft. 7. Ina multiplier, a pattern chain, a cylinder therefor, a star wheel for said cylinder, a. pin gear for said star wheel, a driving shaft 011 which said pin gear is slidable but relatively non-rotatable, and pattern controlled selective means for intermittently rotating said driving shaft in either direction.

8. In a multiplier, a pattern chain, a cylinder therefor, a star wheel for said cylinder, a pin gear for said star wheel, a driving shaft on which said pin gear is slidab-le but relatively non-rotatable, and pattern controlled selective means for intermittently r0- WILLIAM M. WATTIE. f

KARL S. WHITTEN. i

tating said driving shaft in either direction,

said latter means comprising a star wheel on said driving shaft, a pair of additional drivingshafts means to rotate said latter shafts continuously in opposite directions, and pin gears slidable on said latter driving shafts and selectively engaging said star Wheel on said first driving shaft.

9. A multiplying mechanism comprising a pattern cylinder, a box chain thereon, a multiplying chain, a reversing chain, a plurality of box-shifting levers controlled by said box chain, a pair of additional levers controlled bysaid box chain, connections from one of said additional levers effective to control said multiplying chain, and connections from the other additional levereffective to control the reversing chain.

10. In a drop box loom, a harness chain H and cylinder, means to drive said cylinder in one direction, a box chain and cylinder, means to drive said box chain cylinder in either a forward or a reverse direction, and a gear train maintaining said first and second driving means in fixed driving relation.

-11. In adrop box loom, a harness chain and cylinder, means to drive said cylinder in one direction, a box chain and cylinder, means to drive said box chain cylinder in either a forward or a reverse direction, and releasable means to maintain said first and second driving'means in fixed driving relation and effective to restore said relation after release of said second driving means.

12. In a multiplying mechanism, a box chain, a multiplying chain, a reversing chain,

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