Mechanical guns and projectors – Spring – Bow
Patent
1995-04-28
1997-05-20
Ricci, John A.
Mechanical guns and projectors
Spring
Bow
124 256, F41B 512
Patent
active
056304056
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shooting bow that can be used for target or game shooting.
2. Description of the Related Art
Known are technical solutions, similar to the present one, for instance, a bow for shooting, used in hunting and in sporting events, comprising a frame, arms, disposed at a small angle relative one to another, having eccentric rollers at their tips, utilized to redistribute the bow forces (see U.S. Pat. No. 4,976,250, date of publication--Dec. 11, 1990).
The bow features a soft springback due to a parallel disposition of the arms; however, its shape does not provide for springback compensation during shooting and the bow is displaced backwards and upwards, which has a poor effect on the accuracy of hits. Besides, since the bowstring thrusts against the arrow tail piece, the arrow shaft is subjected to compression and, as a result, in the process, the amplitude of the arrow self-oscillations increases, which, in turn, reduces the range and accuracy of a hit.
There is also a prior art shooting bow for target shooting, comprising arms, attached to the central element and convex in the direction of shooting, pulleys, a bowstring, manufactured in the form of two end spans and one middle span, a frame and a trigger mechanism (see U.S. Pat. No. 4,879,987, publication date--Nov. 14, 1989).
This prior art shooting bow, according to the technical solution, is made compact, but features the drawbacks of the foregoing bow.
SUMMARY OF THE INVENTION
The purpose to be achieved in the course of designing a new structure of a shooting bow has consisted of ensuring improved accuracy, increasing the range of shooting with a similtaneous decrease of weight of said shooting bow as well as creating more comfort for the bowman.
The purpose of the invention is to increase the accuracy of shooting with a simultaneous decrease of the bowman's contribution to the result of a shot, to decrease the weight of said shooting bow as well as to increase the effective range of shooting.
The purpose is achieved thanks to including a carriage into the prior art shooting bow, disposed on the bowstring. The carriage is manufactured with cutouts, located on the front surface thereof, the number of which corresponds to the number of arrow fletchings, and with a longitudinal track on the bottom and a groove for the bowstring. At the same time, the lower edges of the exit holes of the groove are positioned below the upper surface of the longitudinal track of the carriage, the arrow head contains fletchings with cutouts in the rear part, able to enter respective cutouts of the carriage, the tail piece of the arrow is made tapering, and the frame is made up with a carriage guide, with a horizontal slit in the forward part and a slot, in which the arrow guide is mounted, with the end spans of the bowstring passing via the horizontal slit in the frame. The carriage is manufactured movable along the carriage guide, the distance between which and the upper surface of the longitudinal track of the carriage being greater than the diameter of the arrow. The point of locking the arrow in the carriage is located in front of the centre of gravity of the arrow, whereas the width of the arrow head is smaller or equal to the width of said slot in the frame of the shooting bow and greater than the diameter of the arrow shaft. The profile of said puleys is preferably designed to meet the condition: .DELTA.S.sub.1 =Kx.DELTA.S.sub.2 where: M.sub.1 ' of the system "arms-pulleys"; position M.sub.2 ' of the system "arrow-carriage"; course of straightening of the arms, which makes a relation: .DELTA.S.sub.1 /.DELTA.S.sub.2, while the arms satisfy the condition, when the total impulse of the systems "arms-pulleys" and "arrow-carriage", that acts on the main part at the point the arms are attached thereof, at each instant of straightening of the arms, approaches zero.
Additionally, the end spans of the bowstring are made bifurcated, the middle span is made up with swellings, and the arrow i
REFERENCES:
patent: 3443558 (1969-05-01), Peck
patent: 4649891 (1987-03-01), Bozek
patent: 4697571 (1987-10-01), Waiser
patent: 4732134 (1988-03-01), Waiser
patent: 4879987 (1989-11-01), Nishioka
patent: 4926834 (1990-05-01), Chauvin
patent: 4976250 (1990-12-01), Jeffrey
patent: 5119797 (1992-06-01), Anderson
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