Mechanical guns and projectors – Spring – Elastic band
Patent
1976-07-14
1977-09-27
Pinkham, Richard C.
Mechanical guns and projectors
Spring
Elastic band
124 80, F41B 700
Patent
active
040504387
ABSTRACT:
A slingshot comprises a stock having front and rear ends. A manual gripping handle is disposed at the rear end of the stock. A pair of sheaves are rotatably mounted adjacent the front end and rear end of the stock on opposite sides of the fore-to-aft longitudinal axis of the stock. These sheaves are rotatable about generally upright parallel axes of rotation. An elastic band is provided having outer free ends anchored at points disposed adjacent the rear end of the stock on opposite sides of the fore-to-aft longitudinal stock axis. The elastic band extends forwardly from these anchoring points and is wrapped around the rotatable sheaves. The elastic band includes a pouch capable of carrying an object to be propelled. Upon displacement, the band is stretched in an energy-storing fashion so as to propel the object forwardly upon release. This arrangement provides an inordinately long length of elastic band, thereby increasing the ability of the band to stretch and maximizing its energy-storing capacity. As a result, the velocity of fired projectiles can be significantly increased without appreciably increasing the force required to extend the band, or the length of the stock.
REFERENCES:
patent: 310873 (1885-01-01), Bradley
patent: 2540303 (1951-02-01), Sylvester
patent: 2825323 (1958-03-01), Huszar
patent: 3609902 (1971-10-01), Casull
patent: 3783852 (1974-01-01), Shepherd
patent: 3918427 (1975-11-01), Turner
patent: 3949729 (1976-04-01), Pfotenhauer
Browne William R.
Pinkham Richard C.
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