Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Projectile backstop
Patent
1993-11-17
1996-01-23
Millin, Vincent
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Projectile backstop
273404, F41J 112
Patent
active
054860083
ABSTRACT:
A bullet trap with a passageway defined between flat upper and lower boundary walls extending convergingly, at opposite angles of inclination of between 0.degree. and about 15.degree. to the horizontal, from an entrance opening to an exit opening or throat, and a deceleration chamber having a generally spirally curved circumferential boundary wall and provided in its upper region with an inlet opening and in its lower region with a discharge opening leading to a collecting vessel. The circumferential boundary wall of the chamber is constituted by two oppositely concave channel-shaped members the respective upper end regions of which are spaced from each other to define the inlet opening, and the respective lower end regions of which are spaced from each other to define the discharge opening. The chamber communicates at its upper region with the passageway substantially tangentially of the chamber via the directly adjacent inlet opening and throat, and a liquid lubricating fluid can be directed into the chamber from the collecting vessel either in a forced flow mode (pump-activated) through the inlet opening or in a passive mode (bullet-activated) through the discharge opening. For the special purpose of enabling a previously fired firearm to be checked for whether a bullet remains in the firing chamber of the firearm, the trap may have the same basic construction but without the liquid lubricating fluid feature.
REFERENCES:
patent: 385546 (1888-07-01), Decumbus
patent: 694581 (1902-03-01), Reichlin
patent: 840610 (1907-01-01), Easdale
patent: 2013133 (1935-09-01), Caswell
patent: 2772092 (1956-11-01), Nikoden
patent: 3737165 (1973-06-01), Pencyla
patent: 4126311 (1978-11-01), Wagoner
patent: 4512585 (1985-04-01), Baravaglio
patent: 4821620 (1989-04-01), Cartee et al.
patent: 5070763 (1991-12-01), Coburn
patent: 5113700 (1992-05-01), Coburn
patent: 5121671 (1992-06-01), Coburn
"Range Design Considerations" by Detroit Armor Corporation, 1986, pp. 1-38.
Miscellaneous Bullet Trap Product Information Sheet by Caswell International Corp.
Holler Norbert P.
Millin Vincent
Passive Bullet Traps Limited
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