US690268A - Primer for ordnance. - Google Patents

Description

Patented Dec. 3| VON- GUBTZ.

PRIMER FOB ORDNAILCE.

filed Sept. s, 1900.

(Application 2 Sheets-Sheet I.

(No Model.)

No. 690,268. Patented Dec. 3|, lam.

' c; voneomz.

PRIMER FOR ORDNANCE.

- (Application filed Sept, 28, 1900.)

(No Model.)

' sary for an electrical primer to be such that to the rear shell, a percussion-cap Z -,'and anllN TED STATES ATENT OFFICE.

SKODAlVERKE AOTIENGESELLSCHAFT IN PILSEN, OF PILSEN, AUSTRIA- HUNGARY, A FIRM.

PRIMAERY FOR ORDNANCE.

SPECIFICATION formingpart of Letters Patent No. 690,2 dated December 1901; Applicatioh filed September 28, 1900. SerialNo. 31,429. (No model.)

To all whom it may concern:

Be it known that I, CONSTANTIN VON GoRTz, a subject of the Emperor of Austria-Hungary, 4 residing atVienna, in the Province of Lower Austria, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Primersfor Ordnance; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters and figures of-reference marked thereon, which form a part of this specification.

I11 order to combine certainty of firing with the advantages of electrical primers for ordnance with certainty of ignition, it is necesincase of a failure of the electrical firing the charge can be immediately fired mechanically (by percussion) without changing any part of the primer. \Vhen metal cartridgecases are not used, this object can be efi'ected by means of a compound primer, such as hereinafter described, in combination with an arrangement on the breech block of the gun, comprising an electrical conductor, which is situated in and insulated from the breechblock and leads to a contact-piece of the primer, and a firing-pin, which is arranged in the breech-block for percussion-firing.

A primer according to this invention is shown in section in the accompanying drawings in Figure 1 and shown in firing position in a gun in Fig. 2.

The percussion-firing arrangement of the compound primer comprises a primer-body consisting of a rear shell (1., of a material which is a conductor of electricity, and a forward metallic shell a, threaded and screwed vil c, screwed into the shell a and between which and the solid head of the shell a the percussion-cap b is held, priming composition d, loose granular powder j, and adetonating charge 6. The shell a has a boss 15 formed in its end and provided with a central open ing 14, said boss serving to separate the granular powder from the priming composition, and.

each portion can be'separately loaded to fatcilitate the manufacture.

- In'Fig. 2 the primer is shown in position ready for firing in the breech-block 3 at the firing end of the gun 4. The breech-block contains a suitable firing-sleeve 6, bayonetjointed to the sleeve 5, thatis likewisebayonet-jointed to the block, which is only shown in part. The sleeve 6 carries the firing-pin .9, that is suitably propelled by a spring 25. NVhen the firing-pin is released, it will indent or perforate the comparatively thin head of the metallic shell a, force the cap 19 against the anvil, ignite the priming composition d, the loose granular powderj, and then the detonating charge to fire the gun.

In order to electrically discharge the primer, the head of the shell a is provided with nonconductive coating or face '11 and a conductive contact 7L. This contact is'counected to an insulated wire f, wound in a groove cut in theouter cylindrical wall of the shell a, and is then connected to one end of a bare incandescible wire g, that has its opposite end connected to the interior wall of the shell a or passes through this wall. This wire also passes through the priming composition (1.

In orderto electrically fire,the breech-block is provided at the rear with an insulating plate 7 and one 8 to insulate the head of the primer from the sleeve 6, which is connected by wire 11 to one pole of a battery 12. The other pole of the battery is connected by wire 13 to a suitable circuit-closer or firing-button 10, and this is connected by insulated Wire 9 to the part 3 and passes through it, so that the end of the wire forms a suitable contact with the shell a or the end of the incandescihlo wire passing through the shell. Closing the button 10, circuit will be made from battery 12, wire 11, sleeve 6, contact h, insulated wire f, incaudescible w-ire g, through the wall of the shell a or directly to contact end of insulated wire 9, button 10, and wire-13 back to battery, thereby heating the wire gand ignitiug the priming d, which iguites the granular powder j through the central opening 14: in the boss 15, formed on the inner threaded end of theshell a, that carriesthe detonating charge.

Having thus described the invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. A primer comprising a metallic shell formed in two parts,an anvil and a percussioncap held between the anvil and head, and a priming composition in one of the parts, a detonating charge and loose granular powder in the other part, substantially as described.

2. A primer comprising a metallic shell having a central bore and solid head, an anvil screwed into the bore, a percussion-cap held between the anvil and head, a priming composition filling the bore, an outer shell provided with a perforated end screwed to the first-mentioned one and containing loose granular powder, and a detonating charge, substantiallyas described.

3. A primer comprisinga metallic shell, an anvil screwed therein, a percussion-cap held between the anvil and the head of the shell, a priming composition therein, an incandescible wire passing through the priming composition, means Qfor closing an electric circuit through the wire and loose granular powder, and a detonating charge beyond the priming composition, substantially as described.

t. A primer comprising a metallic shell, an insulating-covering for the. head of the shell,

an anvil screwed in the shell, a percussioncap held between the anvil and the head of the shell, an electrical contact on the head of the shell, an incandescible wire within the shell and an insulated wire connecting the contact and incandescible wire, and a priming composition surrounding the incandescible wire adapted to be ignited by the percussioncap substantially as described.

5. A primer comprising a metallic shell having an external groove, an insulating-covering for the head of the shell, an anvil screwed in the shell, a percussion-cap held between the anvil and head of the shell, an incandescible wire in the shell, an electrical contact in the head of the shell and an insulated wire in said groove connecting the contact and incandescible wire, a second shell screwed into the end of the first one and containing loose granular powder, and a detonating charge contained in said second shell, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CONSTANTIN VON GORTZ. \Vitnesses:

GUSTAV PHILIPPOTSOH, ALVESTO S. HOGUE.

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