US157743A

US157743A - Improvement in cotton-gin ribs

Info

Publication number: US157743A
Authority: US
Publication date: 1874-12-15
Anticipated expiration: 1891-12-15

Description

UNITED STATES PATENT FFICE.

JOSEPH C. DU BOIS, OF GREENSBOROUGH, ALABAMA.

IMPROVEMENT IN COTTON-GIN RIBS.

Specilication forming part of Letters Patent No. 157,743, dated December 15,1874 application led September 9, 1874.

To allv whom it may concern:

Be it known that I, JOSEPH C. DU BOIS, of Greensborough, in the county of Hale and State of Alabama, have invented a new and useful Improvement in Cotton-Gin Ribs; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this specification, in which- Figure l is a view in perspective of the cotton-gin rib with my improvement. Fig. 2 is a view in perspective of the chilling-block; and Fig. 3 is a transverse sectional view of Fig. 1, taken through the line x x.

Cotton-gin ribs have been heretofore chilled on the face only. When a ange has been used it has been cast on the face of the rib, except at the point where the cotton is driven against the rib by the teeth of the saw. The point last mentioned, an inch or more in length, has been left plain and chilled on the face in casting, and the flange at this point has been supplied by riveting to the face of the rib a piece of brass of appropriate size, and corresponding in shape to the flange cast on the rib. Both of these methods are ineffectual and expensive ineffectual because the edges of the rib, where it is most likely to be worn, are not chilled, and expensive because several operations have necessarily to be performed to complete the rib.

My invention relates to an improvement in the class of cotton-gin ribs above mentioned; and it consists of a cotton-gin rib having its face, lian ge, and edges chilled at the point where the saws drive the cotton against the rib, the object being to prevent the rib from being worn at the edges, as will hereafter more fully appear.

In the accompanying drawing, A is a cotton-gin rib provided with a flange, B. O is a chilling-block of iron, provided with a recess, D, of a shape to receive the rib A and iiange B at the point E, and leave the rear face of the rib Ain the same plane with the rear face of the chilling-block O.

To cast the rib A, the pattern and chillingblock C are placed in the sand in the flask, and when the impression is taken the pattern is withdrawn, but the iron chilling-block C is left in the ask. When the molten iron is poured into the ask it comes in contact with the iron chilling-block O, and is suddenly cooled, thereby chilling the face, flange, and edges of the rib A at the point E.

By this operation an improved rib is produced, which will not be worn at the edges byl having the cotton driven against it, as would be the case were the edges not chilled, as has heretofore been the case.

Having thus described my invention, what I claim as new and useful, and desire to secure by Letters Patent, is

As a new article of manufacture, a cottongin rib having its face, flange, and edges chilled at the point where the cotton is driven against it by the saws, as hereiubefore set forth.

In testimony that I claim the foregoing improvement, as above described, I have hereunto set my hand and seal this 5th day of September, 1874.

JOSEPH O. DU BOIS. [L. s]

Witnesses:

E. A. REEsE, J. W. HILDEBRAND.