US2874727A

US2874727A - Shuttle binder control means

Info

Publication number: US2874727A
Application number: US617324A
Authority: US
Inventors: Joseph M Budzyna; Crowther Howard
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1956-10-22
Filing date: 1956-10-22
Publication date: 1959-02-24
Anticipated expiration: 1976-02-24

Description

J. M. BUDZYNA ET AL SHUTTLE BINDER :CONTROL MEANS Filed 001",. 22'. 1956 INVENTOR. JOSEPH M. BUDZYNH HOWARD CROWTHER' A TTORNE Y United States Patent 50 SHUTTLE BINDER CONTROL Joseph Budzyna, East ouglas, and Howard Crowther,

Hopedale, Mass., assignors to Draper, Corporation,

Hopedale, Mass., a corporation of Maine Application October 22, 1956, Serial No. 617,324

'5 Claims. .(Cl. 139-187) This invention relates to shuttle binder control means for looms, and, more particularly, to such control means which functionsin conjunction with the loom crank arms or pitmans.

It is a general object of the invention to devise an improved means for controlling ashuttle'binder so that there shall be an increased pressure at the time the shuttle is received and decreased pressure when it ispicked.

A more specific object is to accomplish the above mentioned objectives by a resiliently pivoted means oscillatable with and upon the crank arms of the loom'and effective upon the binder through its action upon the protector rod and attendant parts.

Other objects of the invention will following more detailed disclosure. d

Various attempts have been made to control a shuttle through means affected by the crank arms of the loom, but in practically all instances, these have been directed toward using some part of the crank arm motion to take off a part only'of the-resilient pressure otherwise continuously applied to the binders. Again there are instances where a means fixed to or controlled by the crank arms applies added pressure to binders already under influence of spring or other pressure members. None of 7 appear from the these has functioned well enough to have gone into more than very limited usage.

According to the invention, a shuttle binder may be controlled throughout virtually its entire cycle of action by a simple means carried by and movable both with and relatively tothe crank arm upon-which it is pivoted.- It is biased in one direction, preferably by a rubber torsion spring, but by any convenient equivalent means so long as the proper motions are taken advantage of as the crank arms pass through their cycle.

A protector mechanism including the usual rod with fingers pressing against the binders is provided and this rod also mounts the conventional daggers. It may or may not be provided with a light spring to maintain the fingers in contact with the binders more for the purpose of preventing clattering at speed than to exert any shuttle arresting pressure, the latter being provided in practically its entirety by the control from the crank arms.

Each arm is provided with a pivot adjacent its point of connection to the lay sword and at this point a spring pressed arm is provided which may engage at its free end with an arm fixed to the protector rod. Movement of the crank arm throughout its oscillatory path imparts to the pivot and arm thereat a motion which affects the binders through the protector rod, arms and fingers such that the shuttle is free when picked, but is eifectively braked when it enters a box.

The invention will be described in greater detail by reference to one preferred embodiment and a modification thereof as illustrated in the accompanying figures of drawing, wherein:

Fig. 1 is a section through part of a loom showing the invention applied thereto.

Fig. 2 is a section taken at line 22, Fig. 1.

' Fig. 1.

2,874,727 Patented Feb. 24', 1959 2 Fig. 3 is a section taken at line 3-3, Fig. 1. Fig. 4 is a sectional view showing a modification. Figs. 5 and 6 are diagrammatic views showing the manner in which the crank arm control functions in governing binder pressure.

Now referring to Fig. 1, a part of a loom is shown including a loom-side 10, lay beam 11 with other lay parts and one of the swords 12 upon which the lay swings in beating up the filling. A shuttle 13 is boxed at the shuttle boxes 'atthef lay ends which are comprised of a front box plate 14, a rear box plate 15 with which functions a binder 16. The latter is pivoted in the usual way and may have a light spring (not shown) to tension it'slightly and prevent its clattering, although that is not necessary and such a spring would not be depended upon for pres- ;sure to friction the shuttle.

The lay is reciprocated to and fro by pitmans or crank arms generallyindicated by numeral 17 and pivotedat18 to the sword and having a capped end 19 by which they are attached to their individual crank 20 on crank shaft It is to'be understood that there are two swords, crank arms and cranks and that practically all mechanism herein described is duplicated at each end, although one 1 only may be illustrated and specifically described. The particular crank arm shown is one of spring type, but that is not essential to the present invention.

A protector rod 22 is oscillatable in the usual bearings in brackets fixed to the lay or other convenient parts and carries daggers 23 engageable with frogs 24 for the usual purpose. Arms 25 also fixed to rod 22 carry fingers 26 with adjustable contact screws 27 which engage the free.

end of their respective binders. These screws are locked in adjusted position by nuts 28. The fingers are of two parts bolted together but may be of unitary construction if desired.

When a shuttle is in the box as shown, the fingers 26 swing the rod and daggers 23 to a position such that the latter clear the frogs, but if not boxedat the critical point in 'the cycle, the fingers will be pressed inwardly along mm the binders, and daggers 22 will engage their frogs to stop the loom. I

The function of the protector, rod and fingers just described is a known one, but according to the invention,

these parts are also employed in combination with means acting in conjunction with the crank arms to apply the required pressure against the binder as the shuttle enters the box, and at the picking out of the box, relieve some or all of that pressure. Each crank arm has a boss 29 in which a pivot 30 is fixed. This pivot is preferably keyed, but may be a bolt member clamped so as not to turn in its support. An arm 31, preferably curved as shown, is secured to the pivot by or in such means as to be urged resiliently about its pivot in a clockwise direction, The arm is offset so its end carrying a follower 32 aligns more or less centrally of the sword to contact beneath an arm 33 fixed to rod 22 between the two webs of the sword, Fig. 2.

While the means by which this arm 31 is resiliently biased as stated may be of any convenient type, a rubber torsion bushing unit is preferred. Such a bushing unit, Fig. 3, has an outer metal sleeve 34 clamped in the hub 35 of the arm, an inner metal sleeve 36 clamped by bolt 30 and the rubber bushing itself at 37 bonded to both

sleeves

34 and 36. Adjustment may be effected by clamping screw 38. Normally, this bushing unit is set so as to give the required braking resistance at the binder as the shuttle enters the box.

Due to the motion of the crank arms, Figs. 5 and 6, the centers of pivot bolts 30 carried by the crank arms 17 describe an orbit in which the arms 31 are swung first in one direction and then the other. If we assume resistance at the arm end of the last-named arms, then this action o alternately tensions and releases the rubber torsion bushings 37 of the torsion units in torsional shear.

At the top center, Fig. 5, at about which time the shuttle is picked, the crank arm has swung upwardly about its connection 18 at the swordl 2 and the rubber bushing 37 relaxed so as to swing arm 31 counterclockwise. There may at this time, be anactual clearance between abutment screw 27 and the binder so that the shuttle 13 is picked from a virtually free box for construction and adjustments may be such as to press the binder to a slight extent and thus to friction the shuttle slightly as it picked.

As the crank shaft 21 rotates about 180 to the bottom center at which time the shuttle I3 is received, the angular disposal of the crank arms is, such that, a maximunrof pressure is brought to bear. v clockwise by the torsional forces of the rubber torsion bushings.

In certain looms a modified form of the invention has been utilized. This modification, Fig 4, difiers in that the boss 29 is extended downwardly from the crank arm 17 and a shorter, simpler arm 31'is provided. This arm is similarly biased by a torsion bushing unit at the pivot 30' and has a follower 32' which engages anarm 33' fixed to the protector rod 22f. Connections to the shuttle binders are the same as in the form first described.

While one embodiment and a modification of the invention' have been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This invention is, therefore, not to belimited to the precise details described, but is intended to embrace all'variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

We claim;

1. In a loom having a crank shaft, a swinging lay having a shuttle box at either end and a crank arm connecting said lay to the crank shaft, a shuttle binder at each shuttle box, a protector shaft carrying a dagger and a finger for contacting and applying pressure to the binder, a means for biasing said shaft to cause the finger to apply pressure on the binder which comprises a first arm fixed to said shaft, a pivot intermediate the ends of the crank arm, a second arm oscillatable upon the crank arm pivot and having its relativelyfree end engaged with s'aid first arm at the shaft, and resilient means applied between said crank arm and said second arm pivoted thereto for urging the latter in a direction to tighten the binder on the shuttle.

Such position is diagrammatically shown in The arms 31 are then forced 2,874,727 r v r t- 2. In a loom having a crank shaft, a swinging l'ay having a shuttle box at either end and a crank arm connecting said lay to the crank shaft, a shuttle binder at each shuttle box, a protector shaft carrying a dagger and a finger for contacting and applying pressure to the binder, a means for biasing said shaft to cause the finger to apply pressure on the binder which comprises a pivot on the crank arm, and a resiliently urged arm means oscillatable about said pivot and with the crank arm and operatively arranged at said pivot to urge said arm means in a direction to press the binder to shuttle arresting position;

3. In a loom having a crank shaft, a swinging lay having a shuttle box at either end and a crank arm connecting said lay to the crank shaft, a shuttle binder at each shuttle box, a protector shaft carrying a dagger and a finger for contacting and applying pressure to the binder, a means for biasing said shaft to cause the finger to apply pressure on the binder which comprises a pivot on said crank arm, an arm oscillatable about said pivot and with the crank arm, and a torsionspring at said pivot and elfective for urging the arm pivoted thereat in a direction to press the binder to shuttle arresting position.

4. Mechanism as defined in claim 3 wherein said torsion spring comprises a rubber torsion bushing clamped to'both the arm and the pivot on the crank arm.

5. Ir1 a loom having a crank shaft, a swinging lay having a shuttle box at either end and a crank arm connecting saidlay to the crank shaft, a shuttle binder at each ,shuttlebox, a protector shaft carrying a dagger and a finger for contacting and applying pressure to the binder, a means for biasing said shaft to cause the finger to apply pressure on the binder which comprises an arm pivoted to the crank arm and spring biased to be oscillatable both with and upon the crank arm, and means between said arm and protector shaft for imparting motion from the former to the latter.

References Cited in the file of this patent UNITED STATES PATENTS