US223312A - Fuse for explosive projectiles - Google Patents

Description

J. A.BRAND. Fuse for Explosive Projectiles.

No. 223,312. Patented Jan. 6, I880.

Fig. I

MPEIERS PNOYOUTHOGRAPHER. WASHINGTON, D, C.

UNITED STATES PATENT OFFICE.

JUNIUS A. BRAND, OF NORWICH, CONNECTICUT.

FUSE FOR EXPLOSIVE PROJECTILES.

SPECIFICATION forming part of Letters Patent No. 223,312, dated January 6, 1880,

Application filed October 27, 1879.

To all whom it may concern I Be it known that I, JUNIUs A. BRAND, of Norwich, in the county of New London and State of Connecticut, have invented a new and useful Improvement in Fuselgniters for Explosive Projectiles; and I do hereby declare the same to be described in the following specification, and represented in the accompanying drawings, of which- Figure 1 is a side view, Fig. 2 a longitudinal section, and Fig. 3 an end view, of afusetube or bomb-lance shank provided with my invention, which relates to the screw-cap of the said tube or shank, and to the firingpin and the percussion-cap holder thereof, and is not only to seal the firing-pin chamber and hold the firing-pin in position so as to prevent it from being accidentally driven against the cap, but is to prevent the latter, when back upon the end of the firing-pin chamber, from. sealing such end so as to preventor materially obstruct the escape of the gases incidentto the combustion of the charge of the primer and fuse.

Fig. at is atop view, and Fig. 5 a transverse section, of the firing-cap holder A. This holder is a flanged cup having a vent-hole, a, through the center of its bottom, and also two other vent-holes, b I), through its flange c. The percussion powder or composition is placed Within a small cup or cap, 0?, which is inserted and fitted closely into the recess of the holder. The said percussiou-cap-priming holder has a diameter equal, or about equal, to that of the fuse-tube carrier B, which, in this case, is to be supposed to be the tubular shank of an explosive bomblance, such as is used in capturing or killing whales or various other seaanimals. A fuse, C, properly supported within the carrier B, terminates at one end near the cap-holder A, which is held in place by a metallic cap, D, which is screwed upon the carrier B and against the flange of the holder. Directly in front of the holder there is, within the said cap D, a'shallow circular recess or chamber, 0, which communicates with the firing-pin chamber f by a passage, g, having a diameter a little greater than that of the shank h of the firing-pin E. In the bottom of the chamber 6 are one or more grooves or channels, i, leading into the flring-pin-shank passage g.

Fig. 6 is a rear view of the cap D, showing two of the said channels i, which are formed by a groove extending diametrically in and across the bottom of the chamber 0..

The firing-pin E has a cylindrical head, is, which is provided at its outer end with a thin yielding flange, Z, that fits into a shallow 0113111 ber or recess,m, made in the cap D at the outer end of the firing-pin chamber. The said flange l is to be strong enough to support the firing pin in place, so as to prevent it from being accidentally thrown forward against the percussion-cap or primer. The said flange, however, should be incapable of withstanding the force of the explosion of the charge of the gun from which the missile or projectile may be discharged. The flange, by means of cement or a suitable sealing material, is to be hermetically sealed in the recess for its reception.

On explosion of the charge of the gun taking place, the firing-pin, by the force thereof, will be broken away from the flange and driven forward against the primer or'percussion-cap, so as to cause the fulminate or composition thereof to be exploded. On firing of the fulminate or charge of the primer or cap 61 so taking place, the said cap is liable to'be driven channel or channels 71 in the bottom of the back with great force; and. were it not for the chamber 6, such cap, on being so driven back, would be liable to estop the flring-pin-shank passage g, and thus prevent escape of the smoke and gas produced. So, were it not for the shallow chamber 0, its channel or channels 1', and the vent hole or holes of the percussioncap holder, the escape of gas from combustion of the fuse-might be interrupted or prevented by the percussion-cap when covering the passage g.

Should the hole in the bottom of the capholder become obstructed, or the cap not be forced back out of it, the vent hole or holes in the flange of the holder will allow escape of the gases into the chamber 0, from whence such gas or gases will be discharged throughthe firing-pin chamber.

Previous to my present invention I have made the firing-pin-chamber sealing-disk separate from the firing-pin, and applied to the latter a spring to force or hold it back against the disk, in order to prevent such pin from being accidentally driven forward. My pres- 5 cut improvement enables me to dispense with such spring, which I accomplish by providing the firing-pin with the yielding sealing-flange, directly attached to orin one piece with it, the said pin. 10 What, therefore, I claim as my invention is as follows:

1. The cap D, provided with the chamber f, the annular sealing-recess c, and the firing-pin, arranged as set forth and having a yielding 15 sealing-flange, m, extending from and connected with the said pin, and hermetically sealed in the said recess 6, all being substantially as explained, whereby the said flange is made not only to support the firing-pin,but to 20 serve as a means of hermetically estopping the outer end of the chamber in which such pin is arranged.

2. The shank-cap D, provided with the shallow chamber 0 and one or more channels, 1l,ar-

ranged therewith and with the firing-pin cham- 2 5 her substantially in manner and for the purpose specified, in combination with the capholder A and the percussion-cap thereof, arranged as set forth.

3. The holder A, provided with the bottom 0 and flange vents, ml), and the cap d, as ex- LUoIUs BROWN,

J osEPI-I SELDEN.

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