Firearms – With adjustable head space – By reaming
Patent
1982-09-30
1984-08-28
Jordan, Charles T.
Firearms
With adjustable head space
By reaming
42 8, 42 27, F41C 2700
Patent
active
044675445
ABSTRACT:
A hypodermic dart gun of the firearm type includes a user-adjustable valve for regulating the feed rate of high pressure combustion gases from an exploded blank cartridge into the breech end of a gun barrel containing a hypodermic dart whereby the velocity of the ejected dart, and hence its effective range, is controlled. A pivotally mounted breech block for receiving the blank cartridge includes a baffle element for generating high combustion gas temperatures and pressures to ensure complete burning of the smokeless type gunpowder used in conventional blank cartridges. The adjustable valve forms a part of the breech block and is comprised of a high-temperature-resistant metering orifice whose cross-sectional area is determined by the position of a threaded member turnable in screwlike fashion into and out of a bore in a wall of the breech block.
REFERENCES:
patent: 3346981 (1967-10-01), Tabor
patent: 3381403 (1968-05-01), Murdoch
patent: 3745682 (1973-07-01), Waldeisen
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