US991282A - Method of making fiber torpedo-cases. - Google Patents

Description

F. BUTCHER. METHOD OF MAKING FIBER TORPEDO GASES.

. APPLICATION FILED AUG. 25, 191.0. 99 1,282.

. Patented May 2, 1911.

2 SHEETS-SHEET 1.

E NORRIS FETER! '0., WASHINGTON n c F. BUTCHER. METHOD OF MAKING FIBER TORPEDO GASES.

A-IPLIOATION FILED AUG. 25, 1910.

Patented'May 2, 1911.

z SHEETS-SHEET 2.

FRANK DUTCI-IER, OF VERSAILLES, PENNSYLVANIA.

METHOD OF MAKING FIBER TORPEDO-CASES.

Specification of Letters Patent.

Application filed August 25, 1910.

Patented May 2, 1911. Serial No. 578,984.

To all whom it may concern:

Be it known that I, FRANK DUTCHER, a

citizen of the United States, residing at Versailles, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in the Method of Making Fiber Torpedo-Cases, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in the method of making fiber torpedo cases.

The object of my present invention is to manufacture from a sheet of fibrous material an open ended fiber torpedo case having formed within the wall of its bottom a longitudinal strap receiving slot, whereby a cheap and effective case is provided, having incorporated therein means for attaching thereto a rail-engaging torpedo.

In the accompanying drawingFigure 1 is a perspective view showing the first step of the method. Fig. 2 shows that step of the method by which the longitudinal slot is formed. Fig. 3 is a perspective View of the completed tube 'with the mandrels therein. Fig. 4 is an end view showing the compression step. Fig. 5 is a perspective view of a completed elongated tube, the mandrels removed. Fig. 6 is a detached perspective View of a completed torpedo case.

One of the difficulties which manufacturers of fiber case torpedoes have encountered for years is the provision of simple, cheap and effective means for attaching to the fiber case a rail-engaging strap without the use of strap attaching members in addition to the case itself. By means of my present method, I am enabled to produce an open ended fiber torpedo case which has embodied in the bottom wall thereof a longitudinally extending strap;retaining slot, thus avoiding the necessity and the expense of additional retaining elements and the expense of applying those additional retaining elements.

In practicing my method, I form an elongated tube which is afterward cut up into suitable lengths for cases which is economical, but so far as the method of forming the case tube is concerned, the method may be used in making a tube of the length of the torpedo case. In carrying out my method, a sheet of paper or fiber 1, is placed upon a plate 2, the latter being a little larger than the sheet. The sheet is then coated with paste and a mandrel 3 is placed upon the sheet, the edge of the mandrel being in line with one edge of the sheet 1. This mandrel is of a contour corresponding to the desired general contour of the completed torpedo case. The mandrel 3 is then turned by hand in the direction indicated by the arrow a, Fig. 1, which wraps the fiber sheet around the mandrel, the mandrel being of a length greater than the width of the sheet to provide projecting ends 4, by means of which the mandrel is turned. When the sheet 1 is partially wrapped around the mandrel 3 to leave, for instance, about two thicknesses to pass over the bottom 5 of the mandrel, a second mandrel 6, is placed on the outside of the partially wrapped sheet and at the bottom thereof, as shown in Fig. 2. The two mandrels are then turned together and the balance of the sheet wrapped therearound as indicated in Fig. 3, which leaves the outer end 7 of the sheet, at one side of the bottom 8 of the tube. This wrapping is done by hand and leaves the spaces 9 at opposite sides of the mandrel 6, as shown in F 3. The mandrels with the wrapped sheet then in the form of a tube, are compressed in dies, as shown in Fig. 4. The under die 10 has a recess 11, corresponding in shape to the top 12 of the tube or torpedo case, while the upper die 14 is provided with a central slot 15 and flat portions 16 at the side of this slot. The top die 14 forces the two last wrappings 17 of the sheet in contact with the other wrapped portion of the sheet, as shown in Fig. 4 and directly cements them. In addition, the pressure of these dies compresses all of the wrappings tightly together, giving them a sharply fixed contour and fixes them tightly together before the cement or paste is dried, and also forms a decided and permanent slot 18, formed directly in the bottom wall of the case, through which the rail-engaging strap is quickly and easily passed by the operator in the factory, and at any desired step in the completion of the torpedo.

It will be, of course, understood that the dies 10 and 14 are of a length corresponding to the length of the tube to be formed and that a tube of any practical length, such as that shown in Fig. 5, may be formed and will be of a length to make a diiferent number of torpedo cases by dividing it at the out line, Fig. 5.

Having thus described my invention, what I claim and desire to secure by Letters Pat ent is:

1. The method of forming open ended fiber torpedo cases with an open ended slot incorporated in the wall thereof, consisting in providing a fiber sheet, partially wrapping said sheet upon a mandrel, applying a second mandrel to the outside of -the partially Wrapped sheet, then completing the wrapping of the sheet and then withdrawing the two mandrels.

2. The method of making open ended fiber torpedo cases, With an open ended slot incorporated in the wall thereof, consisting in partially wrapping a fiber sheet upon a mandrel, applying a second mandrel to the out side of the wrapped portion of the sheet, completing the wrapping of the sheet, subjecting the wrapped sheet to outside shaping dies while the wrapped mandrels are therein, and finally withdrawing the wrapped mandrels from the completed case.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses. FRANK DUTCHER. \Vitnesses GERTRUDE DAVIDSON, SIMON F. Lone.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

Images