Mechanical guns and projectors – Spring – Bow
Patent
1988-11-30
1990-04-17
Coven, Edward M.
Mechanical guns and projectors
Spring
Bow
124 24R, F41B 500
Patent
active
049170716
ABSTRACT:
An improved mechanical projector is disclosed of the type including a stock member and a drawstring extending across the stock member to engage a projectile lying along the stock member axis. Variable leverage devices are mounted in various ways on either side of the stock member, drivingly interconnecting the drawstring and at least on resiliently deflectable member such as a pair of prod limbs or a pair of elastic elements. Each variable leverage device includes a rotary element connected to a drawstring segment and causing flexing of an associated deflectable member by drawing of the drawstring with increasing leverage with advancing draw movement. The rotation of the rotary element in each variable leverage is synchronized by a constraint imposed by a driving connection to a slider element movable along the length of the stock member. In the disclosed embodiments, the driving connection is provided by affixing the drawstring to the slide and alternatively to load cables also attached to the rotary elements causing deflection of the deflectable members by drawing of the drawstring.
REFERENCES:
patent: 269249 (1882-12-01), Wilcox
patent: 1328967 (1920-01-01), Reaben
patent: 1375990 (1921-04-01), Yorgensen
patent: 2842114 (1958-07-01), Duncan
patent: 3028851 (1962-04-01), Drake
patent: 3809048 (1974-05-01), Handford
patent: 4169456 (1979-10-01), Van House
patent: 4438753 (1984-03-01), Simonds
Benefiel John R.
Coven Edward M.
Jackson Gary
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