US634302A - Bladder. - Google Patents

Description

No. 634,302. Patented Oct. 3, I899.

O. E. LUNGDEN.

BLADDER.

(Application filed Aug. 14, 1899.)

(No Model.)

CHARLES E. LONGDEN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE SEAMLESS RUBBER COMPANY, I OF SAME PLACE.

BLADDER.

SPECIFICATION forming part of Letters Patent No. 634,302, dated October 3, 1899.

and I do hereby declare the following, when I taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a side view of a bladder constructed in accordance with my invention; Fig. 2, a section on line a b of Fig. 1; Fig. 3, a side view of a bladder as heretofore constructed; Fig. 4, a section on the line 0 d of Fig. 3.

This invention relates to an improvement in the inflatable portion or, as they are commonly called, bladders for foot-balls and other inflatable balls. As generally constructed these bladders are formed from four or more sections, the adjacent edges of which are united by binding-strips, and for the purpose of curing and packing two or more of the sections are folded inward; so that the bladder will lie flat; but when thus folded difficulty is experienced in curing the bladders, so that some sections are more elastic than others, and in many cases the folded sections are liable to crack at the crease.

In inflatable balls, and foot-balls particularly, it is of course desirable that the bladder should properly fill the ends of the leather jacket or cover, and when the bladders are formed in four sections the sections do not increase in length, so that unless the bladder is made as long or slightly longer than the jacket or cover the ball will not take the desired shape.

The object of this invention is to form the bladder so that it may be evenly cured without folding either of the sections, to reduce the number of joints or seams, and thereby reduce the cost of manufacture, and produce a bladder which will increase in length as it is inflated; and it consists in the construction as hereinafter described, and particularly recited in the claim.

1899. $erialN0-72'7,164. (Nomodeh) For a complete understanding of the invention I have illustrated in Figs. 3 and 4 a bladder as usually constructed, and which consists of four sections A, B, C, and D, the adjacent edges of which are united by bindingstrips a. The sections C D are folded inward between the sections A B, which are thereby allowed to lie flat, and it is this folding of the sections C D which renders it difficult to properly cure them and which makes the bladder liable to split on the line on which the sections C Dare folded.

As shown in Figs. 1 and 2 of the drawings, my improved bladder is formed from two ellip-' tical sections E F, corresponding to each other in size and having their adjacent edges united by a binding-strip b in the usual manner and the extreme ends reinforced by small caps d. In one edge the usual inflating-tube G is provided, which opens into' the bladder, and around the tube where it enters the bladder I preferably provide a reinforcing-disk H. In thus constructing the bladder from two pieces both pieces may lie flat, and therefore be evenly cured, and the necessity of creasing, and hence liability to crack, is avoided. Furthermore, it has been found in practice that a bladder formed from two sections, as shown in Figs. 1 and 2, will slightly increase in length as it is inflated, whereas a bladder formed from four sections, as shown in Figs. 3 and 4, will not increase in length and, on the contrary, is liable to decrease in length and so that the ends of the jacket into which the bladder is inserted will not be sufficiently infiatedQ Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

A bladder for inflatable balls, formed from two elliptical sections united at their edges, and provided with an in Hating-tube, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

' C. E. LONGDEN.

Witnesses:

FREDERIC C. EARLE, LILLIAN D. KELsEY.

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