US1852812A

US1852812A - Loom picker

Info

Publication number: US1852812A
Application number: US202732A
Authority: US
Inventors: Harvey I Leiby
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1927-06-30
Filing date: 1927-06-30
Publication date: 1932-04-05
Anticipated expiration: 1949-04-05

Description

geous features.

Patented Apr. 5, 1932 UNITED STATES,

PATENT DFFICE HARVEY I. LEIBY, OF BLOOMSBURG, PENNSYLVANIA, ASSIGNOB T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF SEW YORK LOOM PICKER Application filed .Tune 30,

Pickers for looms are subjected to severe service. The requirements are most exacting. In the first instance, the picker must be made from a material which will not dull or damage the metal shuttle point which means that it must be formed from some nonmetallic substance. On the other hand, how"- ever, it must be formed of a substance which will withstand the severe, rapidly-repeated blows of the metal shuttle point without too rapid wear. Again, it must beof a substance which is absolutely non-elastic so that when it receives the blow of the shuttle and reaches the end of its backward'movement, there will be no rebound imparted to the shuttle. And in addition to the foregoing, it should be also a material not adversely afiected by the heat and moisture of the weave room.

Heretofore, only rawhide and leather pickers have been used in actual practice, rawhide pickers having been used for certain applications such as at the box end of drop box looms, and leather pickers having been used for certain other applications, such as tail pickers for cotton looms.

Rawhide pickers have many disadvantathe best grade ofrawhide, the hide of the Water or mud buffalo being used extensively. The hide is worked in a moist condition, and seasoned to effect the gradual removal of the moisture. This requires that the pickers be kept in a cool, dry place for some three months. Following this the pickers must be then soaked in oil for at least three months after which they are removed and allowed to dry for from one to three months before being used. This makes a long manufacturing process. Even when thus prepared, however, the finished pickers are very susceptible to moisture and must be stored in a cool, dry room away from the sunlight to prevent them from warping and opening between the layers. Again, the life of a rawhide picker is comparatively short, often not more than three to six weeks, which means constant replacements. And in operation, rawhide pickers frequently give trouble, one trouble met with being the binding of the picker on the guide rod due' to swelling They must be made from 1927. Serial No. 202,732.

when subjected to the heat and moisture of the weave room.

Leather is not open to all the objections of rawhide as a material for pickers but its .use is limited to certain kinds of pickers, it being unfitted, for example, for box loom pickers which run on guide rods. However for such types of pickers as it is adapted for, leather is by no means a wholly satisfactory substance because the life of a picker made from leather is comparatively short.

In spite of the drawbacks referred to above, rawhide and leather, up to the time of the present invention, have been used exclusively in the manufacture of pickers. This has not been because other substances have not been suggested and tried for such substances as wood, vulcanized fibre, vulcanized canvas and rubber, layers of canvas struck together with cement or glue, and horn have been proposed at difierent times. No one of these materials, however, has come into use or proved to be a practical substitute for rawhide and leather.

According to my present invention, I construct a picker from highly compressed spinnable textile fibers held in the highly compressed state by a binder in the form of a resinous condensation product. Such prod nets are characterized in that they are hardened and made dense by the application of heat and pressure. Preferably I use as a binder'the substance known in commerce as bakelite, such substance being a condensation product of phenol and formaldehyde. The textile material may be in the form of sheets 4 of woven cloth such as cotton canvas or cotton duck, woven cloth such as trimmings cut .into comparatively small pieces or otherwise divided, or it may be unwoven textile mater1al. In the case 01 sheets of woven cloth, the picker may be made by -aking a block com prisingwoven textile material united by the tallic suitable shape and therein compressed and heated. Materials of this character made from woven cloth or from unwoven textile fibres are known in the trade and have been used for certain purposes, among which may be mentioned for insulation, and for non-meear wheels.

In t e drawings Figures 1 and Qare perspective views of pickers embodying the in-- vention.

Referring to the drawings, 1 indicates the head of thepicker, i. e., the portion with which the shuttle engages, and 2 indicates the body of the picker, the body being provided with a hole 3 for the loom guide rod. The picker is made from spinnable textile material held in a'highly compressed state by a binder such as a phenolic condensation product. In the present instance, I have illustrated by way of example,'a picker of the type shown in my Patent 1,443,027, granted January 23, 1923. It is to be understood, however, that this is only by way of example and that a picker of any type desired may be made from the material.

J It has been proposed heretofore (Patent No. 649,698 to Lahue and Patent No. 850,088 to Hyde) to make pickers from canvas united by an adhesive such as glue or cement but my invention differs from these proposed arrangements in that the textile fibers areunited by an adhesive which is cured by heat and in that pressures of a high order, for example, pressures of the order of five to seven thousand lbs. per square inch are utilized whereby there is obtained a final product having properties entirely difierent from those obtained by the structures of said patents.

The material is characterized by the fact that it is hard and very tough. As a result it has great wear-resisting qualities but at the same time it does not injure the shuttle points. The material is not afiected by heat, moisture or oil and is non-elastic so that it imparts no rebound to the shuttle.

In Fig. 1 the loom picker is illustrated as being formed from woven material such as cotton duck held by a resinous condensation product. In Fig. 2 the loom picker is illustrated as being formed from unwoven or finely divided material held by a resinous condensation product.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A loom picker of the type comprising a body portion having a longitudinal guiderod opening and a head for engagement with a shuttle, characterized by the fact that at least the head of the picker comprises essentially textile fibers held in a highly compressed state by a resinous condensation product.

2. A picker for looms formed entirely from layers of woven textile cloth united and held in a highly compressed state by a resinous condensation product, said layers being so disposed that the blow struck by the p1cker 1s perpendicular to the direction of said textile layers.

3. A picker for looms formed entirely from woven textile cloth united and held in a highly compressed state by a resinous condensation product.

4. A picker for looms having a shuttle engaging portion formed entirely of woven textile cloth united and held in a highly compressed state by a resinous condensation product.

5. A picker for looms having a shuttle e ngaging portion formed entirely from textile fibers united and held in a high compressed state by a resinous condensation product.

6. A picker for looms formed entirely from textile fibers united and held in a highly compressed state by a resinous condensation product.

7. A picker for looms comprising essentially woven textile cloth united andheld in a highly compressed state by a resinous condensation product.

8. A picker for looms having a shuttle engaging portion comprising essentially woven textile cloth united and held in a highly compressed state by a resinous condensation product.

9. A picker for looms having a shuttle engaging portion comprising essentially textile fibers united and held in a highly compressed state b a resinous condensation product.

10. picker for looms comprising essentially textile fibers united and held in a highly compressed state by a resinous condensation product.

In witness whereof, I have hereunto set my hand this 24 day of June, 1927.

HARVEY I. LEIBY.