US1516674A - Separator for dobby levers - Google Patents

Description

Nov; 25,

c. J. LINDEGREN ET AL SEPARATOR FOR DOBBY LEVERS Filed Oct. 1'7. 1923 a E w m MTM m m .r d J Lm m m w Patented Nov. 25, 1924.

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SEPARATOR FOR DDBBY LEVERS.

Application filed October 17, 1923. Serial n01 669,183.

As ordinarily ,constructech,dolohies are provided with a. pair of oppositely moving knives which cooperate with hooks carried on the opposite end of dobby levers which are pivoted at their central portions to the harness lifting jacks. The upper and lower ends of the, levers are positioned by cross girts and because of the fact that the rear harnesses are required tomove farther than the front, harnesses, these. girts are made with inclined facesisothat'the i'earmost le vers' lie nearer the center of the loom than the foremost levers; VVh'en a harness is to be lifted, one endof the associated lever moves outwardly while the other end has a slight rollingfmotion on-the adjacentgirt, and this rolling coupled with the inclined face, frequently resultsin a backward move ment of the lever, softhat theflevers are crowded toward the rear end of the, girts. In heavy looms this crowding is found to be quite objectionable,as,it frequently results in the engagement of adjacent levers, which should be free to move independently of each other.

To overcom these objections we have bolted to the girts a spacer provided with fingers which lie between the levers so that each lever moves in a prescribed path and is independent of its neighbors. We are aware of the device shown in Patent No. 789,997, granted to B. F. McGuiness, but the spacers shown in that patent are above and below the outer ends of the levers and inasmuch as the hooks on the levers must be replaced from time to time, such a device is inconvenient. Also, in the patented device the levers are necessarily provided with extensions which are very narrow and are thus susceptible to bending.

In our present invention we aim to locate the fingers between the forked ends of the levers, the fingers in this position engaging portions of the levers which of full thickness and therefore less liable to bending.

I It is a further object of our invention to provide a spacer so designed that oneforni will suflice both for thetop and bottom girts. lVith these and other objects in view, which will appear as the description proceeds the invention resides in the combina tion and arrangement of parts hereinafter set forth. and specificallyclaimed. I

in the drawings. whereinwe have shown a preferredform of our invention,

Fig. 1 is a perspective .view of a dobby having our invention applied there-to, Fig. is an enlarged sectional elevation of one of the dobby levers and the associated gii'ts,

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Fig. 3 is a section ta-lizen on line 33 of i Fig. 2 looking in the direction of the arrows,

Fig. 4 is a fragmentary top plan view looking in the direction of arrow 4, Fig. 2, and

i Fig. is a perspective view of one of the throughslotted arm 13 from any convenient part of the loom. Jacks 14 are pivoted on a pin 15 extending between the sides of the dobby and are arranged so that their upper ends form connections with the harnesses (not shown). The acks 14 have outwardly extending central portions 14: to each of which is pivoted one of the dobby levers 16, these levers having their ends forked as indicated in Figs. 3 and t and each being provided with a pair of hooks 17 pivoted to the lever as at 18.

In order to provide for the proper formation of the shed, the girts 19 have their outward vertical faces inclined as shown in Fig. 4 at 20. As the hooks are called by the pattern chain they are drawn outwardly in a well known manner and the levers and jacks are thereby moved to actuate the harnesses. The matter thus far described is old and is shown to illustrate one form of pattern mechanism to which our invention is applicable.

Our invention relates more particularly to the spacers such as are shown in Figs. 2, 3 and 5. Each spacer is provided with an upright body portion 30 which may be tapped as at 31 to receive screws 32 which pass through the girts 19. That portion of the spacer remote from the adjacent girt is provided with a series of integral fingers 33 so proportioned as to lie between the unforked portions of the levers 16, said fingers being of suflicient length to serve as guides for the levers when the latter are in their outermost position. There are two of these spacers for each dobby, one being associated. with each girt and the spacers are substantially the same in contour.

It frequently happens in the operation of the dobby in looms that the levers will either become bent or worn or the hooks wear, necessitating straightening of the levers or replacement of the hooks. In order that this may be done it is highly desirable that the ends of the levers be readily accessible and it is for this reason that we have disposed the fingers 33 between the bifurcated ends and the pivotal axis of the levers, this construction permitting one or the other of the ends of the levers to be moved to the position indicated by dotted lines in Fig. 3 without removing the spacer from the dobby. We find that the upright portion 30 of each spacer need not be formed with an incline to correspond with the face 20 of the girts, but may be substantially perpendicular to the plane of action of the levers.

From the foregoing it would be apparent that we have provided a very simple and effective means for guiding the dobby levers so as to prevent crowding of the same, the result being accomplished by devices which afford ready access to the ends of the levers to permit the replacement of worn hooks etc. Also, the spacers for both top and bottom girts may be identical and are disposed to engage the body of the lever, which latter may be of the usual form and requiring no alteration because of our invention.

Having illustrated one form of our invention, it would be apparent that variations may be made by those skilled in the art, and we do notwish to be limited to the form of the invention shown, but what we do claim i. In a dobby, cross girts, dobby levers with forked ends positioned by said cross girts, and spacers secured to each of said girts and having fingers lying between the levers, said fingers lying between the central. portions of said levers and the forked ends thereof.

2. In a dobby, cross girts, dobby levers with forked ends positioned by said cross girts, and spacers carried by said girts and having fingers passing between adjacent levers, said fingers lying intermediate the forked ends of the levers.

3. In a dobby, cross girts, dobby levers positioned by said cross girts and having forked ends, hooks carried by said forked ends, and spacers carried by said girts, said spacers having fingers passing between the levers and lying between the upper and lower hooks to afford ready access to said books from above and below the fingers.

4:. In a dobby, dobby levers, cross girts cooperating with said levers, jacks pivotally connected to said levers, and spacers, each spacer having a body portion secured to one of said girts and also having fingers extend ing between the levers and lying between the associated girt and the line of pivotal connection between the levers and jacks.

In a dobby, dobby levers and hooks pivoted thereto, jacks pivotally connected to said levers, cross girts cooperating with said levers, and spacers secured to said girts, said spacers having separator fingers lying between the levers, all of said fingers lying between said girts to afford access to the outer ends of said levers.

In testimony whereof we have hereunto afiixed our signatures.

CARL J. LINDEGREN. GEORGE J. PFEIFFER.

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