US2139439A - Loom parallel - Google Patents

Description

1938 c. D. BROWN 2,139,439

LOOM PARALLEL Filed March 22, 1938 INVENTOR C451 D, Deon/N.

1a M%M ATTORNEY.

Patented Dec. 6, 1938 PATIENT OFFICE LOOM PARALLEL Carl D. Brown, Hopedale, Mass, assignor to Draper Corporation, poration of Maine Hopedale, Mass, a cor- Application March 22, 1938, Serial No. 197,438

2 Claims.

The present invention pertains to parallel motions for fly shuttle looms and has more particular reference to the picker stick engaging and positioning means thereof.

Parallel motions of the type to which my invention applies commonly include a parallel which is fixed to the loom rocker shaft, a picker stick having a shoe thereon which rocks on the parallel, the picker stick projecting downwardly through an opening in the parallel, and a thrust device carried by the parallel for receiving the thrust of the lower end of the picker stick. Such thrust device usually consists of a parallel plug, so-called, fixed in a recess in the parallel and projecting into the aforesaid opening.

Prior parallel plugs made of wood are objectionable in that they wear rapidly and thus allow the picker stick to become improperly positioned, as well as requiring frequent replacement of the plugs. Prior parallel plugs made of cast iron or the like are objectionable in that it is difiicult to shape or fit them to the recess in the parallel, which recess is usually cored in the cast body of the parallel and is therefore usually irregular in size and shape.

A principal object of the present invention is to provide a parallel having a parallel plug in a recess therein as aforesaid, which parallel shall have a resilient body whereby it can be firmly driven into the irregular recess but which shall have a steel wear plate for receiving the thrust of the picker stick to thereby prevent wear of the plug, and which plateshall be extended .along converging top and bottom sides of the parallel plug into said recess.

The foregoing and other objects of the invention are accomplished in the construction illus-' trated on the accompanying drawing, of which:

Fig. 1 is a front elevation, partly in section, of a parallel motion comprising the preferred embodiment of my invention;

Fig. 2 is a plan view of part of the mechanism of Fig. 1, to a larger scale; and

Fig. 3 is a detail view in perspective of the preferred form of my improved parallel plug.

The parallel mechanism shown on the drawing is applied to a fly shuttle loom which is not illustrated in detail because the parts and mechanisms thereof not shown may be of any usual construction and form no part of the present in vention. The drawing does show, in addition to the picker stick and parallel motion to be described, part of the left hand loom side I which supports the usual rocker shaft 2.

A parallel 3 is fixed to the end of the rocker shaft 2. A picker stick 4 has its lower end 5 projecting downwardly through an opening 6 in the parallel 3. A shoe 1 is fixed to the picker stick adjacent the lower end thereof. The shoe 1 has a curved surface 8 which rocks on the flat upper surface 9 of the parallel. A spring return drum it is connected to the lower end of the picker stick as by means of a flexible strap II. The parts as thus far described may be similar to corresponding parts of prior looms, except that the parallel 3 is provided with a novel parallel plug which will be hereinafter described.

The upper end of the picker stick 4 is given its operative movement by being pulled inwardly of the loom, which is toward the right on Fig. 1, by the usual lug strap, not shown. To resist this inward pull and position or hold the lower end of the picker stick against inward movement, the parallel 3 is provided with a parallel plug which is indicated generally at l2 on Figs. 1 and 2 and is shown detached from the parallel on Fig. 3. This parallel plug may bear against a wear tongue l3 which is attached to and, in effect, forms a part of the picker stick.

The parallel 3 is provided with a recess l4 which communicates with the opening 6. The recess I4 is tapered in that it is appreciably wider, vertically, at its outer end where it opens into the opening 6 than it is at its other end, as shown by Fig. 1. The parallel may be made of cast iron, in which case the recess M will be made by using a conventional. core and is apt tobe more or less irregular in size and shape.

The parallel plug l2 shown on the drawing consists of a body portion [5 having a steel wear plate l6 covering the projecting end thereof. The body I5 is made of a relatively elastic nonmetallic material, preferably wood. The body I5 is tapered to conform approximately to the shape of the recess M. The upper and lower surfaces of the body l5 are recessed as suggested at H, Fig. 3, from about midway of the length of the plug to the outer or left hand end thereof. The recesses are shaped to provide the plug with a relatively thick end or nose l8 and upper and lower surfaces l9 and 20 which converge in the direction from the nose I 8 toward the opposite end of the plug.

The wear plate I6 is formed from a strip steel material which is bent to completely cover the nose l8 and to provide upper and lower legs 2| and 22, respectively, which extend along the converging surfaces l9 and 20. The legs 2| and 22 may be bent together slightly, before the wear plate is attached to the body l5, so that they will grip the surfaces l9 and 20 and thus hold the wear plate in place when the plug is detached from the parallel.

The parallel plug may be attached to the parallel merely by being driven firmly into the recess l4 and the legs 2| and 22 are long enough to extend into the recess when the plug is so attached. It will be apparent from Fig. 1 that with the legs 2| and 22 converging and extending into the recess I4 the wear plate cannot become loose on the body l5 or move away from the nose l8 thereof. The parallel plug constructed as above described is sufliciently elastic that when driven into the recess II it will conform to the shape of the recess and will be held firmly in place, without any individual shaping or fitting. The steel wear plate [6 is extremely serviceable as compared to said wood plugs, the plate in this respect being comparable to prior cast iron plugs either with or without antifriction rollers. The parallel plug of the present invention is thus possessed of the advantages of both the wood and the iron plugs without the disadvantages of either.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. In a loom, the combination of a parallel having an opening for receiving a picker stick, with a tapered parallel plug fixed in a recess in said parallel and having the thick end thereof projecting into said opening, said parallel plug comprising a wooden body driven into said recess and having said projecting end covered with a steel plate, the top and bottom sides of said body being recessed to provide a relatively thick rounded nose and fiat surfaces extending from said nose and converging in a direction toward the thin end of said plug, and said plate extending into said recess along said converging surfaces and being held in place by engagement with said body and with the walls of said recess in said parallel.

2. As an article of manufacture, a parallel plug for receiving the thrust of the lower end of a picker stick, said plug comprising a wooden body having its top and bottom sides recessed to provide a relatively thick nose and converging surfaces extending from said nose toward the opposite end of said body, said nose being covered with a steel Wear plate having legs extending along and gripping said converging surfaces for holding the plate in place on said body.

CARL D. BROWN.

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