US1312156A - Pbjming charge - Google Patents

Description

UNITED STATES PATENT OFFICE.

WILLIAM H. BUELL, OF NEW HAVEN, CONNECTICUT.

PBIMING CHAR-GE.

No Drawing especial ut1 1ty in igniting the various smokeless and black powders when used in center fire and rim fire ammunition. I The purpose of my invention is to produce a priming charge which is particularly suited for use with powders as now em-- ployed in fire arms, and particularly small arms, such charge producing an explosion of not too great local pressure, and of suflicient heat, and leaving substantially no harmful residues; in its specific form, my invention contemplates the modification of the flash of the priming char e, giving it greater length, and the additlonal advantage that, unlike fulminate of mercury, which is commonly used in primers, there can beno amalgamation with resultant deterioration of the metal of the primer cup or shell cartridge.

the same to According to my invention I produce a priming charge by mixing, intimately, a detonating salt of trini'troresorcinol with a suitable nitrated organic body. For instance, I may mix four parts by wei ht of normal lead trinitroresorcinate wit one part by weight of nitrocellulose and mix salt.

In place of nitrocellulose I may employ some other suitable nitrated organic body, such as for instance, one of the aromatic nitro-compounds as trinitrotoluol' or dinitrobenzene; the aliphatic nitro-compounds, such as tetranitromethane. While the proportions most suitable for the mixture may Specification of Letters Patent.

produce a substantially homo- Patented Aug. 5, 1919.

Application filed July 21, 1916. Serial No. 110,493.

differ with various substances and also with various powders in connection with which the mixture is to be used, they are easily determined by anyone skilled in the art. I desire it to be understood that it is possible that some nitrated organic bodies in combination with a detonating salt of trinitroresorcinol may not produce a primer hav ing the explosive qualities above described and that I therefore include in my invention the use of such bodies only as will in such combination produce such a primer.

It is also to be understood that the term, detonating salt of trinitroresorcinol, refers to such salts of trinitroresorcinol as will detonate and are suitable for use as a primer.

I may also add other substances to my priming mixture, thus, chlorate of potash or some other oxidizing compound, as the perchlorates, nitrates, and peroxids of barium, potassium, sodium, etc., may be added to the mixture or in part substituted and nitrocellulose alone and will have the i additional advantages of an increased flame. The proportions may have to be varied under different circumstances and conditions and with diiferent materials and with different po ders, but they can readily be ascertained oy anyone skilled in the art.

The mixtures above specifically referred to, either of two, three or four substances, constitute a uniform mass. of a bright el-. low color which may be moistened wit a gum solution and then .introduced into the primer cup, where it is seated under heavy pressure and may then, if desired, be covered with paper or foil or by a thin film of collodion or' m. w An anvil of any suitableconstruction may then be inserted into the cups. When the primer is to be used in rim fire ammunition, it is preferably given the treatment with the gum solution and then driven into the annular rim of the cartridge shell by centrifugal force. It may then be covered with collodion.

The priming mixtures described in the above specific examples are homogeneous in character and of the proper igniting qualitiesso that a hot and uniform flame is produced without an excess of normal pressure and with a minimum of harmful residue or none at all. The flame produced has the proper velocity and intensity to ignite the powder charge before imparting any appreciable motion to it before ignition and thus eifects an explosion having the maximum pressure near the breech of the gun and not one which is delayed until the charge is near the muzzle, the portion of the barrel least adapted to withstand bursting pressures.

he subject matter of my invention must not be confused with detonators nor with priming charges which are not suitable for use in fire arms. To make a priming charge suitable for use in fire arms, it must not be too violent in action, but must, on the other hand, be capable of being exploded by the action of the firing pin or other firing mechanism striking against the casing which contains the charge. I

When I speak in my claims of a priming charge I refer to an initial priming charge and not one that must either be ignited by another, separate, initial priming charge, or have admixed therewith a more sensitive substance than the salt of trinitroresorcinol referred to therein.

I claim:

1. A priming charge containing a mix- .ture of a detonating salt of trinitroresorcinol and a nitrated organic body, substantially as and for the purpose described.

2. A priming charge containing a mixture of a detonating salt of trinitroresorcinol and nitrocellulose, substantially as and for the purpose described.

3. A priming charge containing a mixture of normal lead trinitroresorclnatc and a nitrated organic body, substantially as and for the purpose described.

4. A priming charge containing a mixture of normal lead trinitroresorcinate and nitrocellulose, substantially as and for the purpose described.

5. A priming charge containing a mixture of detonatlng salt of trinitroresorcinol, a nitrate'd organic body and an oxidizing compound, substantially as and for the purpose described.

6. A priming charge containing a mixture of a detonating salt of trinitroresorcinol, nitrocellulose and an oxidizing compound, substantially as and for the purpose described. 1

7. A priming charge containing a mixture of normal lead trinitroresorcinate, a nitrated organic body and an oxidizing compound, substantially as and for the purpose described.

8. A priming charge containing a mixture of normal lead trinitroresorclnate, nitrocellulose and an oxidizing compound,

-substantially as and for the purpose described.

9. A priming charge containing a mixture of normal lead trinitroresorcinate, nitrocellulose and potassium chlorate, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand.

WILLIAM H. BUELL.