US2317564A - Guard for paper indicated dobbies - Google Patents

Description

April 27, 1943. R, Q TURNER 2,317,564

Gum Fon PAPER INDIcATED DOBBIEs Filed Sept. 14, 1942 ATTQRNEY Patented Apr. 27, 1943 UNITED STATES PATE OFFCE GUARD FOR PAPER INDICATED DOBBIES Application September 14, 1942, Serial No. 458,219

14 Claims.

This invention relates to loom dobbles of the kind employing a paper pattern and it is the general object of the invention to provide simple means for disabling certain of the pattern readers when a narrow paper pattern is to be used.

In my co-pending application Serial No. 402,080, now Patent No. 2,305,328, I have shown a loom dobby employing a set of pattern readers to be moved toward and from a paper pattern. Those readers which pass through. perforations in the paper lift the corresponding hooks to place them in the path of the lifter knife, while the readers which engage unperforated portions of the paper have their springs depressed and their corresponding hooks remain out of the path of the lifter knife. When a pattern requiring the full capacity of the dobby is used all of the pattern readers are employed, but it not infrequently happens that a part only of the full capacity of the dobby is needed, in which case it is desirable to employ a narrower paper pattern. Under these circumstances the pattern readers which are out of alignment with the paper pattern should be disabled so that they will not communicate useless lifting forces to their hooks. It is an important object of my present invention to provide simple means to be applied to the'carriage for the readers to hold such of the latter as are not needed in inactive 5 position.

1t is a further object of my invention to provide a guard which is positioned and held to the carriage to move with the latter by the unneeded readers when a narrow paper pattern is to be used.

A dobby of the type set forth in my previously mentioned application can be used with a leveler which depresses all of the pattern readers when it is desired to insert a new sheet pattern. It is a further object of my invention to provide a guard the application of which to the carriage is facilitated by depression of all of the pattern readers by the leveler.

With these and other objects in view which will appear as the description proceeds, my inu vention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth;

Fig. l is a diagrammatic side elevation of those portions of a dobby to which my invention more particularly relates,

Fig. 2 is a vertical section on an enlarged scale on line 2 2 of Fig. 1,

Figs. 3 and 4 are views similar to Fig. 2 but showing, respectively, the manner in which the guard is applied to the carriage and thenal position which it occupies to disable the unneeded pattern readers,

Figs. 5 and 6 are horizontal sections on lines 5 5 and 6 6 of Fig. 4, and

Fig. 7 is a perspective view of the guard.

Referring particularly to Fig. 1, I have shown only those portions of a paper indicated dobby with which my present invention is more particularly concerned. The dobby frame i has right and left angle brackets II and I2l respectively, to the underside of which is secured two vertically spaced guide plates I3 between which the sheet pattern P passes. Hook lifter wires lead upwardly from the top plate I3 to the hooks not shown to determine their position with respect to lifter knives not shown.

Secured to the left angle bracket i2 is a depending rod or post l5 which guides an actuator I6 the left end of which as seen in Fig. 1 is raised and lowered by a cam I1 having high and low dwells EB and I9, respectively, connected by inclines 2B. The cam is mounted on the shaft 2I conveniently supported in any approved manner on the dobby frame and driven to give the cam a complete rotation for each reading operation of the dobby. When the dobby is of the socalled double index type shaft 2i will make a rotation every second pick of the loom. An arm 25 on the actuator I5 carries a lever 26 pivoted therein at 21. Lever 26 has a substantially horizontal arm 23 which engages the lower end of the post l5 and a downwardly extending arm connected to an adjustable rod 29.

The carriage C is formed of a U-shaped piece of sheet metal as shown in Fig. 2 having a verl tical wall 39 and top and bottom horizontal flanges 3| and 32, respectively. The left end of the wall 3c as seenA in Fig. 1 has a bearing 33 secured thereto and located between ears 34 on the actuator IS. The post I5 passes through the ears and bearing to guide the actuator and carriage for vertical movement. The right hand end of wall 30 has secured thereto a block 35 to which is pivoted a lever B similar to lever 26 and having a depending arm connected to rod 29. A substantially horizontal arm 3l of lever 3S vbears against a hook 38 pivoted at 39 on the angle bracket II. The two levers 20 and 36 are preferably alike so that as actuator I6 rises and falls the carriage C will also rise and fall.

A leveler L is fitted inside the carriage and has a horizontal flange 46 parallel to flange 3i and a vertical wall 4l parallel to carriage wall 39. In order that the leveler may be moved in a vertical direction relatively to the carriage the latter has pivoted thereto two links 45 which are jointed at 4B to other links 41. The lower end of each link 41 is pivoted on a pin 43 secured to the wall 4I and movable vertically in a slot 49 in the wall 30. A link 59 is connected to the joints 46 and has a handle 5| which is normally in the left hand position shown in Fig. 1 with the leveler up.

The carriage is provided with two parallel rows of pattern readers R extending lengthwisey of the carriage. Each reader has a vertical stem 551the top of which extends through and above the anges 3l and 40. A stop collet 56 on each reader is provided for engagement with the flange 49 and a second collet 51 on each reader receives the upward thrust of a compression. spring 58 which surrounds the stem and lies between the collet 51 andthe flange 32. The bottom of eachstern extends into a perforation in theange 32 and may project below the` latter. The readers are therefore slidable vertically on the carriageY and relatively to the leveler.

Under ordinary operating conditions the parts are in the position shown in Fig. 2` with the springs 58 exerting an upward force on their :1;

to the right as viewed in Fig. 1 to cause the links 45 and 41 to align and effect downward movement of the.leveler. so.. that its iiange 40 will be spacedy below the ange 3.| to lower all the readers; A stop on wall 30 engages one of the links after. the latter have passedslightly beyond alignment to hold the leveler yieldingly locked in low position. When the leveler is down` the tops of the pattern readers extend a slight distance above the ange 3| whilethe bottoms of the readers extend farther below theange 32 than normally, assuggested inFig...3.

Thematter thus far described may be constructed either as set forth in my co-pending application previously mentioned or inV copendingl application Serial No.Y 427,318; now Patent No.4 2,305,386, to1 whichV reference may be had for a further understanding of the. structureV and its operation. It is .believed to be sui'cientfor present purposesto state that when the dobby is to be usedY for itsA full capacity all of theY pattern readers willbe employed, but when a narrow pattern sheet is sufficient it is desirable to disable or render inactive` those pattern readers which are beyond or out of alignment with the narrow pattern` sheet.

In carrying mypresent invention into effect I provide al guard 15 which can be readily applied tothe carriage to hold down'those readers which are .out of registery with 4the narrow paper pattern.

This guard may conveniently be made of sheet metal and comprises an upright body 16 from which extend top and. bottom lateral flanges 11 and 18, respectively. The top flange has the rear edge thereof bent downwardly and toward' the body 16 to form a web 19 having an inclined cam surface for a purpose to be described. Two short ears 80 extend from the bent web 19 toward the body 16 for engagement with certain of the readers. The bottom flange 18 is provided with an elongated slot 82 slightly wider than the space occupied by the two rows of readers. The iiange 18 has end guides 84 at the end of the slot 82 which connect the body 16 with a bar 85 adapted to extend behind the rear row of readers.

When the dobby is to be converted for use from a Wide pattern to a narrow pattern the leveler will be depressed to lower all of the readers to the position shown in Fig. 3. The guard then has the lower flange thereof fitted around the bottoms of those readers which are to be disabled so that they enter the slot 82 with the bar 85 extending behind the readers remote from the body 16. The guard is then raised until its lower flange is adjacent to the bottom ange of the carriage, afterwhich the upper iiange 11 is moved to the right to the position shown in Fig. 4. The inclined web 19 acts as a cam to effect a further depression of the selected readers and the flange 11 is of such width that the edge of the web 19 adjacent to the body 15 will be located behind the right row of readers 40 as viewed in Fig. 4. The fingers 80 engage the adjacent depressed readers to prevent transverse movement of the guard and hold the latter in operative position with respect only to those readers which are to be held depressed.

The leveler is then raised for normal operation and the springs of the depressed readers push the latter upwardly against the iiange 11. The

.. latter is so related to the length of the readers,

the bottom iiange 18, and the carriage that the lower ends of the readers will extend below the flange 18 when the latter has been lifted against the bottom flange of the carriage by the upward thrust of the springs corresponding to the disabling plungers. The guard is thus held in position by the springs and is prevented from movement to the right as viewed in Fig. 4 by the top and bottom flanges of the carriage and held against movement to the left as viewed in that iigure by the right hand row of readers engaging web 19.

It should be noted that the leveler when fully down permits the upper ends of the readers to extend slightly above the bottom of the web 19 when the guard is in operating position. The purpose of this relationship is to permit the leveler to be lowered for manipulation of those readers which are to remain in action without danger that the disabled readers will release the guard.

From the foregoing it will be seen that I have provided simple means for disabling certain of the pattern readers when pattern sheets are used of less width than the maximum capacity of the dobby. It will be seen that the guard cooperates with parts of the readers not only to disable the latter but to be held by them in position so that no additional holding means is needed. It will further be seen that the anges of the guard are so constructed that the springs serve normally to hold the guard in proper position. Also, the cam surface on web 19 eiects a slight depression of the reader when moving from the position of Fig. 3 to that of Fig. 4, after which the disabled readers rise slightly Ibut suiiciently to hold the guard in position.

Having thus described my invention it will be seen that changes and modications may be made therein by those skilled in the art without departing from the spirit andl scope of the invention and r do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a dobby capable of operating with sheet pattens of diierent widths and having a set of hook lifters, a plurality of pattern reading members arranged transversely of the sheet pattern capable of cooperating with the whole set of lifters, a narrow sheet pattern being aligned with a part only of said members, means to move all of said members toward their respective lifters, for a pattern reading operation of the dobby, and stop means to prevent cooperation of those members out of alignment with the sheet pattern with their respective lifters.

2. In a dobby operating with hook lifter elements, a plurality of control members for said elements, one member for each element, a sheet vpattern located between certain only oi said members and their corresponding lifters, means to move all of said members toward their corresponding lifters, and means positioned by the remainder of said members out of alignment with the sheet pattern to prevent cooperation operation of the dobby when said certain members move toward their elements, and means held in such position by the remainder of said r* members as to prevent the latter from cooperating with their respective elements during a pattern reading operation of the dobby.

4. In a dobby operating with harness hook lifter elements, a set of element operating members, one member for each element, means to move all of said members toward their respective elements, a sheet pattern located between certain only of said members and their corresponding elements to control a pattern reading operation of the dobby when said certain members move toward their elements, and means to Iprevent the remainder of said mem-bers from cooperating with their respective elements, during a pattern reading operation of the dobby, said means being located between said remainder of the members and their corresponding elements.

5. In a loom dobby having pattern readers mounted on a carriage movable toward and from a sheet pattern to present the readers to the pattern, said dobby being usable with wide and narrow patterns, .each reader comprising a rod member and a spring urging the rod member to move relatively to the carriage toward the pattern, a guard for the unused readers when a narrow pattern is employed, said guard including a part to engage the unused readers and hold the same depressed with respect to the carriage, and said guard having other parts to engage the unused readers and be held by the latter againstJ i'.

lateral displacement relatively to the carriage, the springs of the unused readers holding the latter in position to engage the guard.

6. In a loom dobby usable with wide and narrow sheet patterns and having pattern readers lil a narrow pattern is employed, said guard including a part to engage the unused readers and hold the latter depressed with respect to the carriage, said guard having a bar to engage the lower ends of the unused readers to prevent lateral movement of the lower part of the guard relatively to the carriage and said guard having another part to engage the upper .ends of the depressed readers to prevent displacement of the upper part of the guard laterally with respect to the carriage, the springs of the unused carriers holding the latter in position for engagement with the upper part of said guard.

7. In a loom dobby usable with wide and narrow sheet patterns and havingpattern readers mounted on a carriage under vthe sheet pattern and movable to present the readers to the pattern, each reader comprising a rod member and a spring urging the rod member to move upwardly relatively to the carriage toward the pattern, a guard for the unused readers when a narrow pattern is employed, said guard having a slot in the lower part thereof to receive the bottoms of the depressed unused readers and having a part at the upper end thereof to engage the unused readers and hold the latter depressed with respect to the carriage, and means on the guard to engage the upper ends of the depressed readers to prevent lateral movement of the upper end of the guard relatively to the carrier.

8. In a loom dobby usable with wide and narrow sheet patterns and having pattern readers mounted on a carriage under and movable toward and from the sheet pattern to present the readers to the pattern, each reader including a spring urging the reader to move upwardly relatively to the carriage toward the pattern, a guard for the unused readers when a narrow pattern is employed, said carriage having top and bottom ilanges through which the readers extend, a body forming part of the guard and extending between and engaging said flanges to limit movement of the guard laterally with respect to the carriage in one direction, other parts on the guard to engage the unused readers to prevent lateral movement of the guard in the opposite direction relatively to the carriage, and said guard having means to hold the unused readers in depressed position relatively to the carriage,

9. In a loom dobby having pattern readers mounted on a carriage below and movable toward and from the sheet pattern to present the readers to the pattern, said dobby being usable with wide and narrow patterns, each reader comprising a rod member and a spring urging the rod member tomove upwardly relatively to the carriage toward the pattern, a guard for the unused readers when a narrow pattern is employed, spaced flanges on said carriage through which the readers extend, the guard having a part to engage the unused readers and hold the latter depressed with respect to the carriage, and said guard having a part which is held against one of said anges by a force derived from the springs of the depressed rod members to limit upward movement of the guard relatively to the carriage, said flanges preventing lateral movement of the guard with respect to the carrier in one direction and said guard having parts to engage the depressed readers to prevent lateral movement of said guard relatively to the carrier in the opposite direction.

l0. In a loom dobby usable with Wide and narrow sheet patterns and having pattern readers mounted on a carriage under and movable toward and from the sheet pattern to present the readers to the pattern, each reader including a spring urging the reader to move upwardly relatively to the carriage toward the pattern, a guard for the unused readers having a lower part to engage the carriage to prevent upward movement of the guard relatively to the carriage, mutually engaging parts on said carriage and guard to prevent movement oi the latter laterally of the carriage in one direction, parts on said guard to engage the unused readers to prevent movement of the guard laterally of the carriage in the opposite direction, and a part on said guard to engage the tops of the unused readers to hold the latter depressed relatively to the carriage, the springs of the depressed readers exerting a force on the last named part transmitted through the depressed readers tending to resist downward movement of the guard relatively to the carriage.

11. In a loom dobby having pattern readers mounted on a carriage movable toward and from a sheet pattern Ato present the readers to the pattern, said dobby being usable with wide and narrow patterns, each reader including a spring urging the reader to move relatively to the carrier toward the pattern, a guard for the unused readers when a narrow pattern is employed, said guard having a part to engage the unused readers and hold the latter depressed with respect to the carriage, a leveler to depress all of the readers with respect to the carriage to a given level, and means on the guard positioned to engage the unused readers and be held by the latter against lateral movement relatively to the carrier when the leveler moves all of said readers to said given level.

12. A guard for pattern readers tending to move relatively to a carriage therefor toward the sheet pattern of a loom, said guard including a vertical body and two spaced laterally projecting anges, one to extend over the readers to hold the latter depressed relatively to the carriage and the other iiange to engage the carriage to limit movement of the guard relatively to the carriage toward said sheet pattern, both of said iianges having parts to engage the readers to prevent lateral movement of the guard relatively to the carriage.

13. A guard for the pattern readers of a carriage movable toward and from the sheet pat,- tern `of a loom, saidV readers being resiliently mounted on the carriage to move toward the sheet pattern, said guard having a vertical body and a flange extending laterally from the bottom of the body to engage the carriage and provided with a slot to receive the pattern readers, a second flange extending laterally from the upper end of the body to extend over and hold the pattern readers depressed relatively to the carrier, said second flange having a part to engage the depressed readers to prevent lateral movement of the guard relatively to the carrier.

14. A guard for the pattern readers of a carriage movable toward and from the sheet pattern of a loom, said readers being resiliently mounted on the carriage to move toward the sheet pattern, said guard having a vertical body, a flange extending laterally from the bottom of the body for engagement with the under side of the carriage and the lower ends of the readers, a second flange extending laterally from the body over the rst named flange for engagement with the upper ends of the pattern readers to hold the latter depressed relatively to the carriage, the second named ange having the edge thereof remote from said body bent toward the first named iiange and said body to provide an inclined surface for the depression of the readers when the guard is moved into position on the carriage.

RICHARD G. TURNER.

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