US2856964A

US2856964A - Paper pattern indicated dobby

Info

Publication number: US2856964A
Application number: US547495A
Authority: US
Inventors: Carl P Bergstrom; Edwin F Dolbeare; Elbridge R Holmes
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1955-11-17
Filing date: 1955-11-17
Publication date: 1958-10-21
Anticipated expiration: 1975-10-21

Description

',Oct. 2l, 1958 c. P. BERGsTRoM "E1-*AL l 2,856,964

PAPER PATTERN INDICATED DOBBY Filed Nov. 17, `1955 3 Sheets-Sheet 1 EDWIN F DOLBEARE .ELBRIDGE R. HOLMES ATTORNEY Oct. 2l, 1958 c. P. BERGsTRoM ETAL l 2,856,964

. PAPER PATTERN INDICATED DOBBYY l l Filed Nov. 1'?, 1955 3 Sheecs'-Sjheei'l 3 INVENTORSL CARL-F? BERGsTRoM EDWIN E DOLBEARE QELBRIDGE R. HOLMES l ATTORNEY United States Patent 2,856,964 l PAPER PATTERN INDICATED DOBBY Carl P. Bergstrom, Millbury, and Edwin F. Dolbeare aud Elbridge R. Holmes, Worcester, Mass., assignors to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application November 17, 1955, Serial No. 547,495 A 16 Claims. (Cl. 139-68) This invention relates to improvements in dobby mechanisms for looms and more particularly to mechanisms of this type which are controlled by a perforated paper pattern.

The usual dobby comprises a series of harness jacks to each of which is pivoted a back lever having upper and lower hooks pivoted to it. as to their vertical position with respect to oppositely moving actuating knives by fingersy pivoted in the lower part of the dobby and having their vertical position determined in turn by pegs on a pattern chain. The lingers are ordinarily arranged in pairs, one finger having direct engagement with a lower knife hook and the other acting through an upright wire to determine the vertical position of its top knife hook. Each pair of fingers and the hooks which they control are operatively associated with a harness frame lifting jack. i

When the weave of a fabric being woven requires .a large number of sheds for a repeat the chain as ordinarily constructed attains considerable length and requires separate supporting means aside from the cylinder. In order to eliminate the usual wood bar pattern chain it has been proposed heretofore to substitute a paper pattern surface having perforated and nonperforated parts and introduce between the paper pattern and the hooks some form of control which acts directly on the hooks and eliminates the fingers. In the present instance this control is eX- ercised through the previously mentioned fingers, the latter being retained so that they can be controlled either by the ordinary pattern chain or by the paper pattern.

lt is an important object of the present invention to provide improved means for mounting and actuating the cylinder for the paper pattern, this means permitting adjustment ci the time of turning of the cylinder inde,

pendently of the position of certain other parts of the dobby, such as the rocker arm which actuates the harness. lifting knives.

It is a further object of the invention to provide means for lifting all of the fingers and then placing under the fingers intended to remain up some form of holding or supporting device the position of which is determined by' the paper pattern. Those fingers which are not called. then descend and the knife actuated hooks corresponding to the called fingers are left in the paths of their respective knives. The supporting devices, preferably hooks, are: aligned with the fingers and can have a width equal tol the thickness of the fingers.

The invention relates more particularly to a double:

index dobby wherein the cylinder turns every other beat. of the loom and places in controlling position two rowsI of perforations which are read by needles at the same: time. These rows are displaced a slight distance from. each other lengthwise of the pattern and the needles are: arranged in two rows, one for each row of perforations.4 It is a further object of the invention to provide a form. of pattern reader and finger support unit wherein the'v needles are all the same but are so made that they canv be reversed with respect to the finger supports to enable These hooks are controlled e '2,856,964 Patented'Oct. 21, 1958 their lower ends to align naturally with the two rows of perforations.

It is a further object of the invention to provide improved manually controlled means for lifting all of the ngers and needles when it is desired to level the warp shed.

It is a still further object of the invention to provide a dobby finger controlling a principal or main unit which can be attached to the ordinary dobby and contain within itself the various parts required for operating the fingers and the finger supporting hooks and pattern reading needles. This feature gf the invention contemplates side members attached to each other by cross bars or the like and having provision for attachment to the frame of the ordinary dobby.

Alt is a further object of the invention to mount the pattern reading needles and their finger supports on a subassembly unit which is mounted on but readily removable from the aforesaid main unit.

A. still further object'of the invention is to provide a lock for the cylinder drive mechanism so made as to positively prevent manual turning of the cylinder unless the lock has first been manually released, or is in released position due to'operation of the dobby. In either event the needles will be withdrawn from the pattern before the cylinder can be turned manually for a pick out operation.

In order that the invention may be clearly understood reference is made to the accompanying drawings which illustrate by way of example the embodiment of .the invention and in which: Y

Fig. 1 is a rear elevation of a dobby having the present invention applied thereto,

Fig. 2 is an end elevation looking in the direction of arrow 2, Fig. 1, v

Fig. 3 is adetailed plan view looking in the direction of arrow 3, Fig. 1, p

Fig. 4 is an elevation looking in the direction of arrow 4, Fig. 3, 1

Fig. 5 is a vertical section on line 5-5, Fig. 2,

Fig. 6 is a fragmentary plan view looking in the direction of arrow 6, Fig. 5, f

Fig. 7 is a horizontal section on line 7 7, Fig. 5,

Fig. 8 is a diagrammatic view showing part of the v finger and the control or support hook therefor together with the associated needle and part of the paper pattern,

Fig. 9 is a plan view looking in the direction of arrow 9, Fig. 2, l

Fig. 10 is a rear elevation of one of the parts of the finger controlling unit,

Fig. 11 is an end view looking in the direction of arrow 11, Fig. 10,

Fig. 12 is an enlarged fragmentary detail end elevation looking in the direction of arrow 12, Fig. 3, showing certain of the parts in nonlocking position, and

Fig. 13 is a diagrammatic view showing two adjacent pattern reading needles and adjacent parts of their finger,

supports.

Referring particularly to Figs. 1 and 2, the dobby designated generally at D includes front and back plates 1 and 2 in which is journaled the usual shaft 3 the rear end of which has keyed thereto a 3-armed rocker arm generally indicated at 4 having upper and lower arms 5 and 6 and having the third arm 7 connected at 8 to a pivoted to a connector 12 having driving relation with the bottom knife 13. Similar connectors for the forward ends of

knives

11 and 13 are provided but not shown herein.

Also extending between the plates `1 and '2 is asupport rod 15 on which are pivoted a series of harness jacks 16 two `of which areshown in Fig. 1. The upper end of each jack has provision for `connection to a lifter 17 extending to a harness frame and the intermediate part of each jack is pivoted at 1S -to a back lever 19 the movement of which Vto the left as viewed in Fig. 1 is limited by cross stop girts 2t) and 21 extending between and secured to the dobby side plates 1 and 2. The upper and lower ends of each back lever l19 are pivoted respectively to top and

bottom hooks

22 and 23. The vertical position of these hooks with respect to their

knives

11 and 13 is determined by fingers 25 which are supported for pivotal movement on a cross rod 26 xed to the dobby sides 1 and 2. As already mentioned these fingers are arranged in pairs, one linger of each pair having an upturned end 27 for direct engagement with a bottom hook 23 and the other finger of the pair having a straight extension V28 for coaction with a vertical rod 29 which extends upwardly to control the position of the corresponding top hook 22.

A pattern cylinder 31 operated and mounted in the usual manner is shown in Fig. l. This cylinder can be turned by a worm V32 on a shaft 33 secured in angularly adjusted position to a sprocket wheel 34 driven by a chain 35 from the top shaft'36' of the loom. A smaller sprocket 37 on shaft 36 meshes with the chain 35 and the sprockets 34 to 37 cause shaft 33 to receive a complete rotation every second pick or beat of the loom. If a pattern chain is on cylinder 31 it can Idetermine vthe vertical position of the fingers 25.

In the operation of the dobby thus far described the rocker arm 4 rocks first in one direction for one beat of the loom and then in the opposite direction for the next beat of the loom, the

knives

11 and 134 moving simultaneously but in opposite directions and being guided in slots 30 in the side plates 1 and 2. Any

hook

22, 23 which is down will be pulled to the right, Fig. 1, by its knife to cause rocking of the associated jack 16 to effect lifting of the corresponding harness frame, and any hook which is up as shown in dotted lines, Fig. l, will be out of the path of its knife and the corresponding back lever 19 will engage the stop girts 20 and 21 as shown for instance at 19a, Fig. 1, and the corresponding jack will not be lifted.

Except as noted hereinafter the matter thus far described is of usual construction and operates in the usual manner. The present invention relates to mechanism for determining the vertical positions of the fingers 25 by means controlled by a paper pattern. These fingers are retained in the dobby so that they can if desired be positioned by the usual pattern chain (not shown) trained over cylinder 31.

In carrying the present invention into effect shaft 33 is extended to the right, Fig. 1, and turns in a bearing 33 formed on a casting 39 which is fixed with respect to the -loom and the dobby D. A mitre gear 40 is secured to shaft 33 and rotates continuously and completes a rotation every beat of the loom. All of the power required to drive the mechanisms to be described hereinafter is transmitted through mitre gear 40.

The invention provides a dobby linger controlling unit designated generally at U and including two side members 45a and 45h shown respectively at the right and left in Fig. 2. These side members are alike except that they are formed right and left hand and one of them, namely, member 45b, will be described in detail in connection wtih Figs. 1, and l1.

Member 45h has a at upright body`50 formed at its upper end with a horn S1 extending to the left as shown in Fig. 1. Integral with body 50 is a plate 52 held to t shelf 57. The lowest part Yof member 45h is formed with a bearing 58 and above this bearing is another bearing 59 for the pattern cylinder. A hub 59a is formed on member @Sb and a rod 60 extends between the members 45a and 451; and is secured to their hubs by set screws 61. A flat needle guide plate 62 rests on the shelves 57 and is secured thereto by screws 63, see Fig. 2. The bearings 58 of members 45a and 45h are secured to another rod 64 by set screws 65. The two members 45a and 4513 and the

parts

60, 62 and 64 secured to them form a stationary framework F which is fastened to the dobby sides by bolts 53. The greater part of the mechanism which controls 'the fingers is mounted on this framework F and the latter forms part of the previously mentioned unit U.

Extending between and rockable on the rear parts of the horns 51 is a shaft 68 to which is secured a lever member 69, see Fig. 9, Vhaving two

sides

79 and 71 at the right and left respectively joined by reenforcing braces 72 integral therewith.

The side member 71 has rotatably mounted thereon a roll 75 extending over a cam 76 secured to a shaft 77 the left end of which as viewed in Fig. 2 has secured thereto a mitre gear 78 meshing with another mitre gear 79 secured to the upper end of a vertical shaft 80 rotatable in a bearing 81 forming part of a casting 82 which is secured at 83 to the rod 60. Casting 82 also provides a horizontal bearing '84 for the left-hand end of shaft 77, Fig. 2, and in addition shaft 77 turns in bearings 85 'formed integral with the

members

45a and 45b. The screws '78 and 79 provide an adjustment intermediatecam 76 and vertical shaft 80 to vary the time of lifting the ngers and needles with respect to the time of turning of the cylinder.

The lower end of shaft 80 turns in a bearing 86 secured to the previously mentioned casting 39 and has a mitre gear 87 secured thereto meshing with mitre gear 4G. When the shaft 33 is rotated during loom operationtbe vertical shaft 86 rotates and by reason of the mitre gears 78, 79 causes rotation of shaft 77 and therefore cam 76 every second beat of'the loom to effect raising and lowering of the lever member 69.

The dobby lingers 25 rest on an angle iron 96 having a horizontal tiange 91 for engagement with the under sides of the right-hand ends of the fingers as viewed in Fig. 5. Each end of the angle iron is connected to an upwardly extending rod 92 the upper end of which is pivoted at 94 to the

corresponding lever side

76 or 71. Whenever the cam 76 raises the lever member 69 the angle section 90 rises to lift all of the lingers 25 to a high position. The angle member has the ends of its vertical flange 95 extended between the

member

45a or 45b and a retaining guard 96 held to the member by a screw 97, see Fig. 7. A nut 98 on the lower right angle bent end of rod 92 provides means for holding the rod and the angle member 9ll'in operative relation.

Right and left-hand stands 100 and 101 are secured on top of the ends of the liat plate 62 by the screws 63 and are also secured to the fiat plate 62 by screws 102, see Fig. 2, which do not extend into the shelf supports 57. Each support 10G-161 has an upwardly extending arm support 163, see Fig. 5, and extending between the two arms 193 is a pivot bar 104 held in place on the arms 105 by set screws 165. The pivot bar R04 extends between the side members 45a and 45h but not into them. Extending over this bar is a holding member 106 held between spaced ears 107 on the arm supports 193.

Pivotcd on the pivot bar 104 is a plurality of finger supporting and pattern reading members 110 each havingv a rigid ngersupport 111 the lower end of which is formed with a hook 112 to enter a notch 113 formed in the corresponding finger 25, see Fig. 8. The upper part of support 111 is curved at 114 to provide a bearing rockable on the bar 104. The support 111 then extends to the right, Fig. 8, of the bar 104 and is bent downwardly at 115 to receive the upper end of pulldown spring 116. The support 111 is then bent upwardly over a bar 117 and extends beyond the latter and is bent down as at 118 and provided with a needle receiving hole 119.

vThe needles 120 for reading the pattern are all alike and each has a straight vertical part 121 the upperend 122 of which passes through hole 119 and is then bent downwardly and ared outwardly at 123. The ends 122 are exible and form yclosed loops which may be opened so that the needles can be attached to or removed from members 110. The needles are suspended from the members such that the loops are coaxialswith each other and the axis and bight thereof are in a plane perpendicular to the planes in which the members move. The bent ends 122 are disposed as suggested in Fig. 13, alternate bent ends being to the right, as in Fig. 8, and the intermediate ends being to the`left, as in the left-hand part of Fig. 13.l By this arrangement the vertical parts of the needles wili rise either on one side or the other of the'down bent parts 118 of the supports 111, and the needles therefore tend normally to hang in two parallel but slightly spaced planes so that their lower ends can extend through holes Ha and Hb in the flat guide plate 62 and disposed as shown in Fig. 6. These holes in the plate 62 will be over rows of perforations in the paper pattern P when the latter is in proper position and stationary.

' Rod'117 which passes under the linger supports 111 is raised and lowered by action of the lever member 69 as shown for instance in Fig. l. Each end of the rod 117 is held by a sei screw 125 ina short lever 126 pivoted on a stud 127 coaxial with bar 104. The studs 127, see Figl l, are held in the

adjacent member

45a, 45b by set screws 128. At each side of the dobby is a rod 130 having at its lower end a rod head 131 which is pivoted at 132 to the corresponding lever 126. The upper end of eachk rod-130 is bent to form a slot 133, Fig. 1, through which passes a stud 134 secured to the associated side member '70, 71 of lever member 69.

Each lever 126 has a small nger 135 thereon to engage an adjustable stop screw 136 supported by the adjacent side member 45a or 45h to limit angle motion of the lever 126 in a clockwise direction as viewed in Fig. l. A second stop screw 137 in a block 138 secured to the

adjacent member

45a, 45b limits counterclockwise turning of lever 126.

Extending along the plate 62 is a spring anchor 140, see Fig. 6, having a plurality of short arms 141 for the lower ends of the springs 116. This anchor 140 is secured to the flat plate 62 by screws 142l at each end thereof. The springs tend to move the needles downwardly and any of the finger supports 111 which engage the rod 117 will tend due to their springs to lower or turn the levers 126 in a clockwise direction, Figs. l and 8.

The paper pattern P` already mentioned is trained around a cylinder 145 which includes a shaft 146 rotatably mounted with respect to previously mentioned bearings 59 on members 45a, 45h. The right-hand end of shaft 146, Fig. 2, has a` handwheel 150 secured thereto for manual turning of the cylinder and the pattern on it. The left-hand end ofthis shaft has a beveled gear 151 secured thereto by set screw 152. The teeth 153 of this bevel gear are engaged by a diagonally disposed drive pin 155 which is secured in a collar 156 adjustably secured angularly and longitudinally on upright shaft 80 by a set screw 157. For each rotation of shaft 80 the pin 155 will give the bevel gear 151 and the cylinder shaft 146 and the paper pattern an angular displacement corresponding to two transverse rows of perforations in the paper pattern.

The bevel gear 151 is provided with a yielding lock which tends to hold it in the position to which it hasv been moved by pin 155. This lock or check includes a lever having a :frustro-conical roll 161 rotatable thereon and positioned for engagement with two adjacent teeth 153. Lever 160 is pivoted on an upright stud 162 on a casting 163 secured at 164 to a left-hand extension of tie rod 64, Fig. 2. An arm 165 on lever 160 receives the thrust of a compression spring 166 between it and an upright arm 167 integral with the casting 163. The spring holds the frustro-conical roll against the bevel gear 151 with suflicient force to prevent accidental displacement of the latter, but will permit movement of the roll over a tooth when the pin 155 turns the gear. The spring then returns the roll to a new holding position with respect to the bevel gear. The yielding lock comprised of lever 160 and associated parts is always related as described with respect to gear 151 whether shaft 146 is turned by power, or manually under conditions to be described.

' In' addition to the yielding lock or check already described a second lock is provided for the bevel gear 151 which however is diierent from the rst lock in that it acts positively during a part of each cycle of the dobby to prevent rotation of the bevel gear. This second lock includes a lever 170 pivoted on the stud 162 and having a roll 171 rotatable with respect thereto on a pin 172, see Fig.V 3. The roll 171 is located ina slot 173 in the lever and is positioned for engagementwith a cam 174 secured tothe upright shaft 80. The cam has a low dwell 175 and a high area 176. Shaft 80, when rotating, not only transmits power to shaftl 77, but also to bevel gear 151 via drive lpin 155 and to lever 170 via cam 174. lPin 155 and cam 174 areA actuating means for gear 151 and lever 170 respectively. f

The right-hand end of lever 170 as viewed in Fig. 1 is provided with a detent having a wedge-shaped part 181 terminating in a tongue 182 having parallel Sides 183.` The teeth 153 of the gear 151 are cut so that the bottoms of adjacent teeth form a slot 18411 having parallel sides 184 to engage the sides 183 of tongue 182, see Fig. 12. When the tongue is tted into a slot 184a the gear 151 is locked positively against rotation.

The detent 180 has a threaded end 185 which passes through a vertical slot 186 in the right end of lever 170, Fig. l, so that the detent can be adjusted vertically to enable its tongue to t into a slot 184m when the paper pattern on the cylinder has its perforation in proper register with the needles. A nut a holds'the detent i its adjusted position in slot 186.

The upright arm 167 has a stud 187 secured thereto and a'small fitting 188 secured to the right end of stud v187 as viewed in Fig. 4 has a bell crank lever 189 pivoted thereto at 190. A rod 191 is pivoted at 192 to the lever 189 and extends upwardly and has its upper end pivotally connected to a stud 193 on a lever 194 mounted for free pivotal movement on the left end of'shaft 68 as viewed in Fig. 2. Roll 195 rotatable on stud 193 rests on a cam 196 normally stationary in the position shown in Fig. l so that rod 191 can normally be in low position `so that a spring 197, Fig. 4, surrounding stud 187 can exert its force on a second arm 198 of lever 170 to hold the detent 180 in normal holding position with respect to the bevel gear151. When rod 191 is lifted as will be described hereinafter arm 199 of the bell crank lever 189 pushes on arm 198 against the action o-f spring 197 to move the detent out of holding relation with respect to the gear 151. Movement of lever 170 by high area 176 of cam 174 moves arm 198 away from arm 199v so that in normal operation of the dobby the rod 191 and parts connected to it do not interfere with the normal running of the dobby.

For hand operation in the event it is desired to level the warp sheds normally inactive shaft 200 is journaledl in the side members 45a and 45h and has a cam 201 secured thereto for engagement with a part, shown here as the-head of a'screw 202, secured to the lever member. 69, see Fig. 2. A handle 203 secured to shaft 200 is normally in thedown position shown in Fig. 1 with the low part of cam- 201 under part202, thus-permitting lever member 69to occupy itslow position. Whenever the handle 200 is turned counterclockwise, Fig. 1, through an angle of approximately 180 the high part of` the cam 201 will push upwardly on part 202 to raise the lever member 69 tov about the same position to which it is lifted by cam 76. When the cam 201` is thus turned a surface 205 thereof substantially concentric with the shaft 200 Will be under part 202 and the latter` and the handle will remain-infraised position.- A stop 206 on cam 201 will by its engagement with part 202 limit angular motion of the cam. This manual lifting of the lever member 69 elevatesthe rods which raise the finger lifter 90 and also rod 117 for the hooked finger supports. Cam 196 is also secured to shaft 200 and turning of the latter as described moves the second described lock to release gear 151 for turning of the cylinder by handwheel 150. During the time that handle 203 is in raised

position shafts

33, 77 and 80 can turn Without effecting pattern reading or nger selection. To restore the dobby to normal running condition the handle 203 is returned to its down position.

It will be noted by referring to Fig. 6 for instance that the hooks 112 are in line with their corresponding fingers so that the full width of the latter is available for holding relation with respect to the hooks. This registry of the hooks 112 with their fingers is insured in part by circular grooves 210 cut into the pivot bar 104 to receive the bent parts 114 of the hook members 111 and in part by a comb shown in Fig. 5. This comb is made of a plurality of bent Wires 215 which extend between the fingers 25 as shown in Fig. 6 and hold the hooks 112 aligned with their lingers. These Wires 215 have their free-ends embedded in a block 216rnade preferably of'wood1 and held to the under side of flat bar 62 by screws 217, see Fig. 5. The comb is thus part of the subassembly unit including the bar 62 and pivot bar 104.

In describing the operation of the dobby it may be assumed that the uncalled fingers 25 are in 10W positionr and that the called fingers are supported by their hooks 112- and the corresponding needles are through perforations in the paper pattern. The needles of the uncalled fingers will be supported by blank areas of the pattern so that their corresponding hooks 112 will be spaced I from the associated fingers and out of the notches 113. The top knife 11 will be approximately in the position shown in Fig. l preparatory to an outward movement to the right. running of the dobby will cause cam 76 to lift lever member 69' through three upward stages. During the first stage the angle lifter 90 will elevate the uncalled fingers to the level of the called ngers or to the position of the upper finger 25 in Fig. 5. During the second upward stage which is much shorter than the first stage all of the fingers will be elevated by the lifter 90` a short distance sufficient to release the hooks 112 of the previously called fingers from their notches 113. This is immediately followed by the engagement of the studs 134 with the tops ofthe rods 130 at the upper end of the slots 133 and during the third stage the fingers 25 are moved to a still higher position and the needles which had been in perforations will be lifted clear ofl the paper pattern.

At this time the second lock will be moved to releasing position relative to gear 151 and inclined pin 155 will give the bevel gear 151 an angular movement equivalent to two rows of transverse perforations on the paper pattern for the next double index indication. The studs 133 are farther from the axis of lever member 69 than are With the parts in these conditions continued l,

thef studs 94 so that the needles and their hooks will be moving at a faster rate than the ngers, this faster rate* also being increased by the fact that pivot 132 on leverl 126-is nearer the pivot rod 104 than is the lifter rod 11/7. The cam 76 will continue to lift lever member 69 for a short. distance thereafter to complete the third stage,y of upward movement, after which continued turningof the shaft 77 in the direction of arrow a, Fig. 1, will permit the lifter and rod 117 to descend so that some of the tingersat least will descend through said stages in reverse order. This downrmotion will be at such a rate that the needles will not he able to engage the paper pattern until As the lever member 69 continues to move down hooks 112 to move into their corresponding notches 113. By this time in the cycle the reverse motion of the aforesaid third stage will be completed and during the reverse motion of the second stage the lingers to be called for the next double indication will engage and be held up byy their fingers 112 and the uncalled fingers 25 will then descend in a reverse first stage.

When the uncalled ngers reach their low position shown in the lower of the lingers 25, Fig. 5, the newv indication for the next pair of beats of the loom will be completed and the lower knife 113, having previously moved to the left from the position shown in Fig. 1, will be in position to begin a working stroke tothe right to engage the knife hooks 23 which are in its path. On the next beat of the loom the upper knife will have a working stroke to engage the indicated upper hooks 22.

The previously described stages both in their direct up motion and their reverse down motion are continuous with no interruptions between them and the length ofv the third stage both rising and reverse will be determined by the length of time required to turn the pattern cylin:

der by the pin 155.

From the foregoing it will beseen that the invention.

provides a unit including the members 45a and 45h which ating means so made that it can be attached as a whole to the front and rear plates of a dobby. There is also pro-4 vided a subassembly unit including the plate 62 and pivot bar 104 and the dents 215 of the comb for the finger supporting hooks so made that it can be constructed away from the main unit and then attached thereto in a simple operation. Also, the needles are made in such manner that merely reversing every other one will enable them to hand naturally in two rows to reach the double index pattern. Furthermore, the second of the locks described has a tongue with parallel sides to enter similarly formed slots between adjacent teeth on the bevel gear 151. The fingers and needles can be lifted manually, if not already lifted, at any time in the loom cycle independently of the position of other parts of the dobby. Also, the finger supporting hooks can be of a Width approximately equal to the thickness of the fingers.

Having now particularly described and ascertained the nature of the invention and what manner the same is to be performed, what is claimed is:

l. In a loom dobby operating with fingers to control harness lifting hooks, a horizontal drive shaft operatively connected to and rotated by the loom when the latter is in operation, a Vertical shaft geared to the horizontal shaft and rotating when the latter rotates, a second horizontal shaft above the drive shaft geared to and turning with the vertical shaft, a pattern cylinder for a perforated paper pattern, a bevel gear on one end of said cylinder, means on said vertical shaft causingl an angular movement of said bevel gear and cylinder for each rotation of the vertical shaft, a pattern reading needle for each of said lingers, a cam on said second horizontal shaft rotating therewith, means caused during part of the rotation of said cam to lift said fingers and move the needles away fromthe pattern and effective duringfa later part of the rotation of said cam to lower said ngers. and present the needles to the paper pattern, and support means controlled by each needle to hold the corresponding ngeriiii lifted position provided the needle passes through a perforation in the paper pattern during said later part ofthe rotation of said cam. s

' l2. The loom dobbyrsetrforth in claimrl wherein said support means comprises a hook member one end of which is adapted to support a finger and the other end of which is pivotally connected to a needle and said cam during said first part of its revolution causes said one end of the support means to move away from the linger corresponding thereto and said cam during said later part of the revolution thereof effects movement of said one end of the support means toward the linger.

3. The loom dobby set forth in claim l wherein means intermediate the vertical shaft and said cam provides for angular adjustment of the cam relative to the vertical shaft to vary the time of lifting said fingers and needles with respect to the time of turning of the cylinder.

4. In a loom dobby operating with a perforated paper pattern and having fingers to control harness lifting hooks, needles for said fingers to read said pattern, means to lift all of said ngers and move all of said needles away from said pattern and thereafter lower said needles to read said pattern, said fingers comprising fiat Vertical thin members and each finger having a downwardly opening notch extending horizontally thereacross from side to side thereof, a support for each nger operatively connected to the corresponding needle and aligned with the associated finger, a hook on each support having a width substantially equal to the side to side thickness of a linger adapted for movement into the notch of the associated linger provided the corresponding needle enters a perforation in said pattern when said needles are lowered, and a comb having dents between said fingers, said dents guiding the hooks on said supports during said movement of the hooks into the notches.

5. The loom dobby set forth in'claim 4 wherein there is provided a perforated at bar through which the ends of the needles adjacent to the pattern pass and a block held to the under side of said flat bar supports said dents.

6. In a loom dobby having a plurality of fingers and operating with a paper pattern having transverse pairs of rows of perforations and wherein both rows of a pair of rows are read simultaneously, a plurality of dobby finger supports each having a linger supporting hook at one end thereof and having a needle receiving hole in the other end thereof, and a pattern reading needle for each hole, each needle having a substantially straight part one end of which is for reading the pattern and the other end of which is connected to a bent part of the needle which passes through the hole of the corresponding finger support, the bent parts of alternate needles passing through the associated holes in one direction to dispose the vertical parts of said alternate needles for reading one row of a pair of rows of perforations, and the bent parts of the intermediate needles passing through their associated holes in the opposite direction to dispose the vertical parts of said intermediate needles for reading the other row of said pair of rows of perforations.

7. In a nger controlling unit for a loom dobby having spaced substantially Vertical and parallel front and back plates and a plurality of harness hook controlling lingers, a pair of side members having provision for attachment to said plates, one member for each plate, a rod extending through and secured to said members, a perforated needle guide plate below said rod secured to said members, a second rod below the guide plate secured to said members and forming with the latter and the first rod and the guide plate a rigid framework for attachment to said dobbyplates, a paper patternA cyliii'cierA rotatable'on said framework, needles mounted oni-'saidA framework passing through said' guidel plate to read `a' pattern onrthe cylinder, a lever member mounted for pivotal movement on said framework,V connections effec#A tive when the lever member is raised to lift the needles awayfrom the cylinder, a shaft rotatable on said framework, a camv on said shaft effective when the shaft rotates to lift said lever member, lifting means movable vertically on said framework for; lifting the dobbylinger`s,`y

and other connections between said liftingmeans and said Vlever member effective when the latter islifted by said cam to raise said lifting-means.

8. The unit set forth in claim 7 wherein a vertical shaft geared to the first named shaft turns in a bearing` f means includes an elongated angle member the ends of which are slidable in guides provided on said framework.

11. In an assembly unit for a loom dobby including spaced side members having provision for a fixed attachment to the side plates of the dobby, an elongated perforated needle guide plate having provision for being secured to said side members, a stand secured to each end of said plate, a pivot bar secured to said stands and extending substantially parallel to and above said guide plate, and a plurality of combined hook and needle members supported on said pivot bar for pivotal movement thereon, the .needle members passing through said guide plate and the hooks having bearings to fit over said bar.

12. The assembly unit set forth in claim 11 wherein a spring is connected at its upper end to each hook and a spring anchor secured to the guide plate holds the lower end of the spring.

13. The assembly unit set forth in claim 1l wherein a comb is supported by the guide plate and has dents which separate the hooks.

14. In a loom dobby having stationary spaced side members supporting a paper pattern cylinder, coaxial levers pivoted on said members, one lever on each member, a lifter rod secured to and extending between said levers, an elongated perforated needle guide plate secured to the side members, a stand on each end of the guide plate, a pivot bar between said'side members secured to and extending between said stands having the axis thereof Coaxial with said levers, a plurality of combined hook and needle members each comprising a hook part pivoted to a needle part, the hook part of the members lhaving bearings fitting said pivot bar and having parts thereof over said rod and the needle part of the members passing through said guide plate, and a spring for each hook member having one end thereof anchored with respect to the guide plate and having the other end thereof connected to the associated hook member and tending to move the latter toward said rod.

15. A combined pattern reading and finger. support unit for a loom dobby having a single perforated stationary needle guide plate and operating with a perforated paper pattern and having a stationary bar and a harness hook controlling linger, said unit including a member having a depending rigid support part formed at one end thereof with a hook to support the finger and having a hole in the other end thereof and having a transverse part between said ends to provide a pivotal open bearing for support on said bar, and said unit including also a pattern reading needle having a straight part to extend through said guide plate for reading said pattern and a bent part extending through the hole in said support part and extending down along said straight part thereof to form a closed loop to maintain said needle connected to said member in a manner to prevent lateral sliding of said needle with `respect to said member 4but permit angular motion of said 4needle relative to said member, said bent part being flexible `so that the loop may be opened and the bent part passed through said hole from either side thereof to enable the straight part of the needle to hang by its own Weight on one side or the other side of said hole.

16. The unit set forth in claim 15 wherein said closed loop on the `needle is coaxial and in alignment with the loops of al1 the other needles when assembled on said loom, the axis and the bight of the loop being perpendicular to the axis of said hole and in a plane perpendicular to the planes in which the members move.

References Cited in the file of this patent UNITED STATES PATENTS Reynolds et al. Dec. 22, 1931 Reynolds et al Oct. 25, 1932 Staubli Dec. 27, 1932 Holmes Nov. 1, 1938 FOREIGN PATENTS Germany Mar. 18, 1938 France Apr. 21, 1954