US733638A - Primer for cartridges. - Google Patents

Description

PATENTED JULY 14, 1903.

J. GARDNER.

PRMER POR CARTRIDGES.

,APPLICATION FILED MAY 1,'1903.

N0 MODEL.

Kamm

UNTTn' STATES Patented July 14, 1903.

PATENT Ormes..

JOHN GARDNER,.OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO WIN- CHESTER REPEATING ARMS CO., OF NEW AHAVEN, CONNECTICUT,

A CORPORATION.

PRIMER son CARTRIDGES.

SEECIFICATION forming part of Letters Patent No. 733,638, dated July 14, 1903. Application tiled May 1, 1903- Berlsl'No. 165,116. V(No model.)

- To all whom it may concern:

Be it known that I, JOHN GARDNER, of New Haven, in the county of New Haven and State of Connecticut, have invented a' new anduseful Improvement in Primers for Cartridges; 'and I do hereby declare the following, when taken in connection with the ac companying drawings and the letters of ref# erence marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part ot' this specification, andrepres'ent, in

Figure l, a v iew in longitudinal section scribed in United States Patent No. 653,953,

granted July 17, 1900, upon my application, the object being to produce a primer for cartridges of superior strength, increased delicacy of lire, andl constructed with particular reference to safety in being handled and packed.

With these ends in view my invention cbnsists in a primer for cartridges having certain details of construction and combinations of parts, as will be hereinafter described, and

pointed out in the claim.

In carrying out my invention as herein shown VI employ a stamped sheet-metal anvil 2, formed at its inner end with a detonating nose 3 and at its outer end with a deep wide notch or cut 4, providing 'a llame-vent which permits the free escape ot' the flame from the detonating composition 5 to the powderin the' cartridge. of the anvil are formed with corresponding stop-shoulders 7 7, located directly opposite each other and at a right angle to the longitudinal axis of the anvil. In assembling the primer these shoulders are brought to a solid bearing upon the square edge of a 'sheet metal anvil-supporting and fulminate-receiving cup 8, the bottemA of which forms the primer-head proper andis preferablyY slightly lcrowned, as shown, to increase its strength, "th'ough that'fis not necessary. vItwill be The parallel edges or sides 6 6.

readily understood that the stop-shoulders 7 7Ain their bearing upon the square edge of the cup 8 positively and definitely' establish the position of the nose 3 of the-anvil in relation to the detonatingomposition 5. By vchangingthe distance of the stopshoulders 7 7 from the nose 3 or by varying the-depth ofthe cup 8 the extension of the nose 3 into the fulminate may be regulated with the greatest nicety. The stop-shoulders 7 7are held solidly against the square edge of the cup 8 by crimping the open end ofthe primershell 9 inward and down over the outer end of the anvil, so as to form a retaining ange or crimp 10, which then coacts withthe stopshoulders 7 7 and the edge of the cup 8 to rigidly hold the anvil 2 against displacement in either direction under any handling or usage that the primer may be subjected to, whereby its accidental detonation is surely avoided. The shell 9 lis bent upon itself at its rear end to form`a head-flange or primer-rim 1l,which limits the depth to which the primer may be seated in the pocket formed for its reception in the head of the cartridge. After the rim 11 has been produced the end of the shell is centrally cut away to form a large circular opening 12 to expose the convex bottom of the cup 8. It will be observed by reference to Fig. l of the drawings that the corner of the cup 8 ts into the inside of the rim 11, so that the shell reinforces and strengthens the cup 8, which ordinarily will be made of softer metal than the shell. In this way added strength is secured and increased delicacy of re attained, for the bottom of the cup forms the head proper of the primer and being softer than the shell secures the delicacy of re referred to.

A primer constructed in accordance with direction in any handling to which a primer may be subjected thereby becomes perfectly safe so far as any danger of ignition due to the movement, of the anvil is concerned. This provision for increased safety has become more and more important onaccount of the heavy charges of fulminate which are necessary to the proper ignition of the denser kinds of smokeless powder. These heavier charges of fulminate also call for stronger primer structures, and such a structure I have secured by the addition of the cup 8, which also performs the additional function of supporting the anvil againstinward movement.

Having fully described my invention, what l claim as new, and desire to secure by Letters .Patong is- Ina primer for cartridges, the combination with a shell formed at its rear end with a rim and a large central opening and having its opposite end crimped to form an anvil-retaining iiange, of an anvil formed at its inner end with a denotating nose, at its outer end with a out or 4notch and on its parallel side edges with stop-shoulders, and an anvilsupporting and fulminate-receiving cup located within the said shell andv having its 'outer edge engaged by the said stop-shoulders which are solidly held against the said edge by the retaining-deluge of the shell which is turned down upon the outer end of the anvil which is thereby positively and definitely held against any longitudinal movement in either direction.

In testimony whereof 1 have signed this speciication in the presence of two .subscribing witnesses.

JOHN GARDNER.

Witnesses: y

W. R. CLARK, DANIEL H.' VEADER.'

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