US412801A - Joseph shaw - Google Patents

Description

Pz- 'egnted Oct. 15, 1889.

J. SHAW.

MACHINE FOR GROOVING TIRES FOR CARRIAGE WHEELS.

(No Model.)

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FIGS.

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UNITED STATES I PATENT OFFICE.

JOSEPH SHAIV, OF MANCHESTER, COUNTY OF LANCASTER, ENGLAND.

MACHINE FOR GROOVING TIRES FOR CARRIAGE-WHEELS.

SPECIFICATION forming part of Letters Patent No. 412,801, dated October 15, 1889.

Application filed July 2, 1889. Serial No. 316,276- (No model.) Patented in England July 3, 1888, No. 9,623.

To all whom it may concern:

Be it known that I, JOSEPH SHAW, a citizen of the United Kingdom of Great Britain and Ireland, and a resident of Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Machines for Grooving Tires for CarriagelVheels, (for which I have received a patent in Great Britain, dated July 3, 1888, No. 9,623,) of which the following is a specification.

This invention relates to apparatus for prod uoing dovetailed grooves or undercut recesses in metallic tires for the wheels of coaches, carriages, and other vehicles for common roads, so that india-rubber tires or treads may be securely held therein.

In the ordinary methods of rolling metallic bars it is impossible to produce a dovetailed or similar longitudinal groove or recess, and in order to obtain such a cross-section it has been customary to take a bar having a channel-section, and then by means of a costly system of rolls to turn over the edges of the bar in two or more passes through the rolls.

According to these improvements I pass a bar having a flattened U or channel section through a die, by means of which the edges orvertical members of the bar are turned inward and the desired cross-section is produced. I thus avoid the necessity for an expensive system of rolls, such as has hitherto been necessary for the purpose.

I will describe my invention with reference to the accompanying sheet of drawings, in which Figure 1 represents a side View, and Fig. 2 an end View, of an apparatus constructed according to these improvements. Figs. 3 and 1 represent details of the apparatus; and Fig. 5 is a cross-section of a rolled bar K, such as I prefer to employ, and which may be rolled from mild steel in the usual manner by ordinary rolls.

In each of the figures similar letters are employed to indicate similar parts or details of the apparatus constructed according to these improvements.

A is a spur-pinion, through which motion is transmitted from a suitable source of power to the spur-wheel 13, upon the shaft of which the roll 0 is fixed. This roll has two grooves or recesses formed in it for the reception of the vertical members of the bar, and it is carried in suitable bearings in the housings D. Instead of forming two grooves in the roll, as represented, the part L, which enters the hollow of the bar when in work, may be a collar or enlarged part of the roll, the diameter of which may then be uniform throughout, except in the collar, and equal to the diameter at the bottoms of the recesses, as shown in the drawings. The bearings of the roll 0 are adjustable vertically by the screws E E, as in ordinary rolling-mills, so as to provide for various thicknesses of bars and to enable more or less pressure to be applied. Below the roll 0 there is a bearing-roll F, and beyond this, and with its upper surface in the same plane, a second bearing roll G. Above the roll G the die II is fixed, with its opening opposite to the grooves in the roll 0. This die is carried by the brackets I, which support it against the strain to which it is subjected when in work. The sides M of the opening of the die are shaped to the outer contour of the sides of the tire and force the vertical members of the bar inward, when the bar is caused to pass through the die. Elsewhere than at the sides M it is preferred to give the die a considerable amount of clearness, as indicated in Fig. 4, so as to avoid unnecessary friction. The opening of the die is flared or trumpet-shaped toward the roll 0, so as to lead the bar and to effect the bending more gradually. For the same reason the lower part of the die, corresponding to the tread of the tire, is also left open. The bearing-roll G, having its upper surface in close contact with the lower part of the die, supports the bar during its passage through the die.

The apparatus having been set in motion, the heated channel-iron K is inserted between the rolls 0 and F, which then force it through the die II. The end of the bar, as soon as it protrudes through the die, may be seized by suitable tongs or similar devices and dragged forward, so as to assist the passage of the bar through the die.

The grooved bar produced by the apparatus hereinbefore described is bent to the circumference of the wheel upon which it is to be fitted and is welded so as to form a tire in the usual manner.

It will be understood that the described rolls are used merely for the purpose of supporting and forcing the bar, and that they do not themselves form the undercut groove, which is entirely produced from the channeled bar by the die H. The rolls may be grooved parallel with their axes, as indicated in Fig. 4, to give them a better grip upon the bar.

Having now particularly described my invention, I declare that what I claim is- 1. In an apparatus for producing dovetailed and undercut recesses in metal bars, the combination and arrangement of the roll 0 with the bearing-rolls F and G and a die H, substantially as hereinbefore described, and as illustrated by the accompanying drawlI] 0S.

E. In an apparatus for producing dovetailed and undercut recesses in metal bars, the combination and arrangement of the bearing-roll G with the die H, substantially as hereinbefore described, and as illustrated by the accompanying drawings.

In testimony that Iclaim the foregoing as my inventionl have signed myname,in presence of two witnesses, this 20th day of J une,

JOSEPH SHAW. Witnesses:

G. W. ROWE, WM. E. WEYS.

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