US15905A - Improvement in card-teeth for machine-cards - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOHN L. TUTTLE, OF NEV YORK,h N. Y.

IMPROVEMENT IN eARD-TEETH FoR MACHINE-CARDS.

Specification forming part of Letters Patent No. l 5,905, dated October 14, 1856.

To all whom it may concern:

Be it known that I, JOHN L. TUTTLE, of the city, county, and State of New York, have invented certain new' and useful Improvey, :ments in the Preparation of Steel Wire to be Used for Card or Cylinder Teeth for Working or Cleaning Wool or Cotton; and I do hereby declare the following to be a full, clear, and eXact description of lthe same, reference being had to the accompanying drawings, making apart of this specification, in Which- Figures l, 2, 3 represent side and back views of the wire. Figs. 4, 5, 6 represent cross-sections through the same. Fig. 7 represents a manner of setting the teeth.

The nature of my invention relates to certain improvements in card-teeth by the preparation of previously-drawn steel wire to be used in cards, clothing, or cylinders for carding wool or cleaning cotton; and it consists in so shaping or flattening round steel Wire as that when set in the cards or on cylinders and ground oft to make a surface the same operation shall make a point to each tooth, as will be described.

I take round steel wire of suitable size and pass itthrough between grooved rollers` of such form as will flatten it out on one side of its center to nearly a knife-edge, or so that a section through or across such rolled or attened wire would resemble in appearance a section through a razor-blade. It is immaterial as to the exact form of the back of the wire, but important to have its edge portion flattened to a knife-edge, or nearly so. The wire thus formed may be tinned and then set in akcylinder, as described in the Letters Patent granted to me on the 30th October, 1849.

There is a marked difference between the drawing of steel WireIthrough diesand the attening or shaping of such wire, as herein set `forth, by passing it through between steel or hard rollers after it has been drawn out through the dies. In drawing Wire the ber of the metal follows the direction of the progressive drawings through ,the dies. I take the wire thus drawn and atten out.one`half of it, or thereabout, bringing it down to a knife-edge, but not a serrated or rough edge, but one perfectly smooth, the ber being rolled at right angles to its position in the drawn wire; and to keep the wire from undue spread- 1851, represents a tooth of ing or from separation of its ber, I place the --rolls in oil, which prevents any tendency of the bers to part, turn out, or make a rough surface. The opposite side of the Wire from a longitudinal line drawn through its center may remain in the form in which it comes from the die; or it may be slightly pressed in toward that part which isattened out to prevent the ber from separating laterally.

Fig. l represents a side view, and Figs. 2, 8 represent a back view,of the attened wire, the lower` portions being represented as unrolled. Figs. 4, 5, and 6 show the form of the wire in cross-section after it is attened, all the gures being drawn on an enlarged scale to better represent the form.

When the attened Wire a c a is set in the cards, it is cut off in an oblique direction, so as to form a point, Z b b, next the knife-edge. After the teeth are set in the cards or cylinder, they are ground off on their oblique or inclined ends to surface theun, (as it is termed,) and this also atthe same time produces the points b, and saves not only the ne cessity of file dressing, but makes a better point and at a better location in the tooth for entering the ber. ,A

In resharpening the teeth it is only neces sary to resurface, one operation completing the whole until the teeth are entirely worn out. This method of preparing the article leaves no feathered or n edges to catch, hold, or clog the cards with the ber. Y y

Having thus fully described the nature of my invention and shown how the same may be used, I would state that y Richd. Kitsomin his patent of November 1l, soft iron and of small wire with a crosssection resembling the cross-section of my card-teeth. This I do not claim; but 4 What I do claim as new, and desire to secure by Letters Patent, is

The making of card teeth by giving to steel wire the form herein described and substantially in the manner set forth, so that when set and a surface ground on them, the same grinding shall form the sharp points thereon.

J. L. 'TUTTLE Vitnesses: i

A. B. SToUGHToN, E. COHEN.

I am aware that

Images