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US 4,411,248 AGranted
Catapult construction
OwnerGilbert Kivensoninventor
Life of this patent
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Abstract
A construction for compact catapults is described. An elastic cord is mounted and placed in tension by threading it through a number of grooved reels. The reels are rotatably fastened to capstans and thereby to a handle-equipped base. When a U-shaped pellet is hooked over a portion of the elastic cord, drawn back and then released, high acceleration forces are transferred to the pellet which then issues from the catapult.
Claims5
A compact catapult for launching projectiles for target practice, plinking and the taking of small game comprised in combination of the following:
- a. an elongated base having four pillars mounted to the top thereof and arranged in pairs so as to make up a front pair and a rear pair;
- b. two anchoring posts also mounted to the top of said base so as to be positioned intermediate between the front and rear pairs of the pillars;
- c. four conically grooved reels mounted by low friction bearings on said pillars so as to be freely rotatable;
- d. an elastic cord fastened between said anchoring posts and stretched so as to pass around the reels and fit into the conical grooves, becoming partially tensed and having a center portion between the rear pair of reels which is perpendicular to the line of fire of the catapult;
- e. a pair of closely spaced marks imprinted on the elastic cord in the middle of said center portion, the marks serving to define an accurately reproducible loading point for projectiles;
- f. an aiming device with a horizontally and vertically adjustable peep sight mounted on one of the front pair of pillars;
- g. a handle fixed to the bottom of said base permitting the catapult to be firmly held in one hand;
- whereby a U-shaped projectile can be directly placed over said center portion of the elastic cord between said marks without the need for a projectile holder such as a pouch, the cord drawn back so as to tense it further and then released to cause a U-shaped projectile to be propelled along the line of fire.
5 more elements
Dependencies are inferred from the claim text.