US1766835A - Loom dobby - Google Patents

Description

June 24, 1930. H. G. PASHOIAN LQOMYDOBBY Filed Sept. 12, 1929 R m 0 .N N R H 0 M5. +7 Nm 7. j; A 7 5 r m m 3 m 0 3 Patented June 24, 1930 UNITED STATES PATE T I HARRY G. PASI-IOIAN, OF W'ORCES'llil'lEt, MASSACHUSETTS, ASESIGNOR TO CROMPTON 45L KNOWLES LOOM WORKS, OF \VOBCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS LOOM DOBBY Application filed September 12, 1929. Serial No. 392,180.

This invention relates to dobbies for looms and it is the general object of the invention to provide a simplified holding construction for the do-bby fingers.

Loom dobbies employ in their construction a set of so-called dobby fingers which are raised and lowered by the pattern surface. It is desirable to be able to remove the fingers readily and toaccomplishthis result it has been customary heretofore to provide the fingers with downwardly opening slots which receive a supporting bar about which the fingers move as a pivot. In order to prevent the fingers from moving upwardly away from the bar it has been customary to place a rod parallel to the bar and a sli ht distance above the fingers, the rod being removed when any finger is to be replaced. The bar and rod have been independent of each other, the bar being held in position by set screws and the rod having one end bent, as in the form of an eye, and the other end split, the split part being spread after the rod is in position somewhat after the manner of cotter pins. It is an important object of my present invention to provide interlocking connections between the bar and rod so that each will assist in holding the other in position, set screws and the split end of the rod being eliminated.

It is a further object of my present invention to provide the finger supporting bar with a peripheral groove which receives a bent end of the rod, the end being so formed as to spring into position and hold itself as well as the bar in place.

It is a more specific object of my inven tion so to relate the pivot bar and rod that a single retaining means for the bar such as a cotter pin and a bent portion of the rod, together with a connection between these two elements, will suffice to hold both of them in operating position.

lVit-h these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

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

Fig. 1 is a front elevation of a portion of a dobby having my invention applied thereto,

F 2 is a vertical section on line 2 2 of Fig. 1,

Fig. 3 is a perspective view of the finger retaining rod forming an important part of my present invention, and

Fig. 1 is a detail elevation of a portion of one of the fingers.

Referring to Fig. 1, I have shown a dobby frame 10 provided with an upper rack 11 defining spaces 12 and certain 'dobby fingers 13. A lower rack 141 is provided with spaces 15 to, guide the leftends of certain other of the dobby fingers, as 16. Upward- 1y extending rods, one of which is designated at 17 in Fig. 1, cooperate with the fingers 16 to control the upper set of hooks not shown, while the fingers 13 control the lower set'of hooks not shown by direct contact.

The (lobby fingers of either the form shown at 13 or 16 are formed as shown in Fig. 4 with a groove or downwardly opening slot 18 which receives a supporting pivotal bar 19. The latter extends between the opposite sides of the frame and is common to all the dobby fingers. A retaining rod 20 extends above the fingers substantially parallel to the bar 19 and passes through the opposite sides of the dobby frame, that portion of the rod above the fingers restraining upward movement of the latter which is possible because of the fact that the slot 18 is open.

The matter thus far described, except for the particular form of the bar 19 and rod 20, is substantially the same as that shown in prior patent to Pfeiffer No. 1,17 1,895 and is possessed of the advantages inherent in the dobby as set forth in that patent.

In carrying my invention into effect I form one end of the bar 19 with a peripheral groove 30 which lies beyond the adjacent part of the dobby frame, and extend a convenient retaining device, as a pin 31, through the opposite end of the bar to engage the other side of the dobby frame. The wire or rod 30 is bent on itself substantially at right angles to form a stop portion 32 which is further bent to provide a hook 33 proportioned to enter the groove 30. The hook is preferably bent outwardly to a slight extent as at 34 to provide a camming surface that will enable the hook to be sprung into the groove.

It will be apparent in Fig. 2 that when the hook is in the groove it can be removed only by a springing action of the portion 3 1-. The bend or stop 32 engages the adjacent part of the dobby frame and limits movement of the rod and bar to the right as viewed in Fig. 2.

When it is desired to remove the bar or rod the hook is sprung away from the groove, thereby releasing both the bar and rod so that either may be moved, the rod being movable to the left and the bar to the right as viewed in Fig. 2.

From the foregoing it will be seen that I have provided a very simple means for holding the finger supporting bar and retaining rod in proper position in the dobby, each of these members being formed to resist movement in a different direction and the members being interlocked so that when connected they are both held against movement in either direction. It will further be seen that the resilience of the hook 83 holds the parts against accidental displacement.

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

1. In a dobby having a frame with opposite sides between which lie dobby fingers, a bar affording a pivotal support for the fingers, a rod extending above the fingers to limit upward movement thereof, means to limit movement of the bar in one direction, means to limit movement of the rod in the opposite direction, and a connection between the bar and rod to prevent relative movement of one with respect to the other.

2. In a dobby having a frame with opposite sides between which lie dobby fingers, a bar affording a pivotal support for the fingers, a rod extending above the fingers to limit upward movement thereof, means to limit movement f the bar in one direction, and the rod being bent to engage the frame of the dobby to limit movement of the rod in opposite direction, the bent end having engagement with the bar to prevent relative movement of the bar and rod.

3. In a dobby having a frame with opposite sides between which lie dobby fingers, a bar affording a pivotal support for the fingers, a rod extending above the fingers to limit upward movement thereof, means carried by the bar to engage one side of the dobby frame to limit movement thereof in one direction, a stop portion formed on the rod to engage the opposite side of the dobby frame to limit movement of the rod in the other direction, and means defining a connection between. the bar and rod to limit relative movement of one with respect to the other.

L. In a dobby having a frame with opposite sides between which lie dobby fingers, a bar affording a pivotal support for the fingers, a rod extending above the fingers to limit upward movement thereof, said rod and bar being parallel, means to limit movement of the bar in one direction, said bar having a peripheral groove, and one end of the rod being bent to engage that side of the dobby frame opposite the means, the bent end effective to limit movement of the rod in the other direction, the bent end of the rod entering the groove to prevent relative movement of the bar and rod.

5. In a dobby having a frame with opposite sides between whichlie dobby fingers, a bar affording a pivotal support for the fingers and having a peripheral groove, a rod extending above the fingers to limit upward movement thereof, said rod and bar being parallel, means to limit movement of the bar in one direction, and one end of the rod being bent to engage that side of the dobby frame opposite the means and effective to limit movement of the rod in the other direction, the bent end of the rod entering the groove to prevent relative movement of the bar and rod, said bent end being sprung into the groove andbeing held therein by its own resilience.

6. In a dobby having aframe with opposite substantially parallel sides and a set of dobby fingers between the sides, a pair of substantially parallel members one extending below the fingers to afford pivotal support therefor and the other extending above the fingers to limit upward movement thereof, one of said members being limited as to movement in one direction and the other member being limited as to movement in the opposite direction, each member being movable relatively to the sides in a direction in which the other member is limited, and connections between said members to prevent substantial relative movement thereof.

In testimony whereof I have hereunto afiixed my signature.

HARRY G. PASHOIAN.

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