Federal-hoffman, Inc.

Other

Federal Cartridge Company

Federal-hoffman, Inc. D/b/a Federal Cartridge Co.

Robert L Kramer

Jack A Erickson

John M Hallis

David C Longren

Lawrence Peter Head

J Bruce Warren

John M Melberg

Jerry J Rubatt

A shotshell comprised of shot pellets of different densities and materials which provide increased effectiveness at both close and long range. Preferably the pellets are disposed in longitudinally stratified layers, with the more dense pellets located rearwardly of the pellets of lesser density. The pellets having the greater density maintain a closer pattern at long range, because they are preferably made of tungsten which has a high density and are located rearwardly, while the pellets having lesser density are preferably made of steel, describe a much wider pattern because of their lower density and forward location, and are therefore most effective at close range.

Shotshell having pellets of different densities in stratified layers

A lead-free rim-fire primer mix which utilizes cupric azide, a highly sensitive chemical, as the primary explosive in lieu of lead styphnate. The cupric azide is mixed with carefully selected proportions of nitrocellulose, tetracene, fine particles of ground glass and a binder, typically gum tragacanth. When mixed in the proper proportions, this mix has the required sensitivity, stability, and non-hygroscopicity for regular commercial rim-fire ammunition. The tetracene is not required as a sensitizer, but is used as an ignition aid. The preferred range of percentages are 10-36% by weight of cupric azide, 5-10% by weight of tetracene, 15-30% by weight of nitrocellulose, 20-50% by weight of glass, and 1-2% by weight of a suitable gum.

Non-toxic rim-fire primer

An improved non-toxic primer which is devoid of metallic oxidizing compounds and of hygroscopic compounds and is comprised of 30-75% by weight of at least two percussion-sensitive compounds selected from a group consisting of a diazo, a triazole, and a tetrazole compound mixed with approximately 10-30% by weight of a suitable propellant, and a frictionator comprised preferably of approximately 12% by weight of calcium silicide and 8% by weight of fine particles of glass. The glass preferably has a particle size of dimensions less than 0.0021'. The primer provides improved propellant ignition, non-toxic ignition products, improved ballistic data, and greatly minimizes misfires.

Non-toxic primer

A non-toxic primer composition for center-fire cartridges which provides improved ballistic data and is void of metallic oxidizing compounds. It is comprised of a mixture of about 10-30% by weight of nitrocellulose and/or a double based propellant such as Hercules Fines, approximately 30-75% by weight of two percussion-sensitive compounds such as DDNP and tetracene, and approximately 10-30% by weight of calcium silicide. The mixture provides improved propellant ignition and non-toxic ignition products, and minimizes misfires in that it contains no hygroscopic compounds.

Non-toxic primer for center-fire cartridges

A three point suspension system for storing a bicycle in a horizontal position, including three support members depending from a ceiling in a triangular pattern.

Hanging bike rack

An improved sabot bullet for use primarily in connection with shotgun shells which includes a slug having a forward portion which radially converges towards the middle portion thereof, and an outer conforming sabot casing which includes a pair of sabot segments which substantially surround and conform to the outer configuration of the slug. Each sabot segment is constructed to be slightly radially spaced from the slug near the constricted middle portion thereof, and to converge and engage the radially diverging portion of the slug near the forward end thereof, so as to cause the slug to be guided mainly at a point adjacent the front end thereof. Each sabot segment is also constructed to extend rearwardly beyond the rear end of the slug to facilitate rearward movement of the slug relative to the sabot, and consequent outward radial wedging of the sabot segments against the inner walls of the gun barrel, upon firing the fireman.

Growing community of inventors

Minneapolis, MN, United States of America

Robert L Kramer