Mechanical projector with variable leverage arrangement

Details Mechanical projector with variable leverage arrangement Mechanical projector with variable leverage arrangement

1986-06-30

1987-03-24

Shapiro, Paul E.

Mechanical guns and projectors

Spring

Elastic band

124 20R, 124 23R, F41B 300

Patent

active

046517073

ABSTRACT:
A slingshot is disclosed in which pairs of primary and secondary swing arms pivoted to a holder frame are pivoted by drawing of a connected drawstring against the resistance of elastic elements, and in which the secondary swing arms swing out to provide a relatively great payout of the drawstring as it is moved to the fully drawn position. This allows the use of an inelastic drawstring.

REFERENCES:
patent: 2430685 (1947-11-01), Pearson
patent: 3028851 (1962-04-01), Drake
patent: 3552373 (1971-01-01), Van Hecke
patent: 3851638 (1974-12-01), Alexander
patent: 4041927 (1977-08-01), Van House
patent: 4169453 (1979-10-01), Hunsicker
patent: 4201182 (1980-05-01), Butler
patent: 4227509 (1980-10-01), Jones
patent: 4338909 (1982-07-01), Plummer
patent: 4411248 (1983-10-01), Kivenson
patent: 4458657 (1984-07-01), Stockmar

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