Adjustable diaphragm game calls

Details Adjustable diaphragm game calls Adjustable diaphragm game calls

1996-02-16

1998-07-28

Hafer, Robert A.

Amusement devices: toys

Operated by relatively moving fluid or pressure differential

Including mouthpiece for blowing or sucking

446397, A63H 500

Patent

active

057855749

ABSTRACT:
A device for adjusting the pitch and quality of the sound produced by a diaphragm-type game call. Two embodiments are presented, which may be built by the manufacturer into a conventional call or clipped onto a pre-existing call by the hunter. The invention comprises a tuning bar which extends across the width of the diaphragm. The tuning bar may be slid along the length of the diaphragm, from the vibrating edge inward toward the fixed supported end. In the preferred embodiment, the tuning bar has a tab or "step" which extends downward toward the diaphragm, acting as a fret or stop and modifying the air flow over the diaphragm, allowing greater variations in sound.

REFERENCES:
patent: 813853 (1906-02-01), Brunner
patent: 2583400 (1952-01-01), Wade
patent: 2928209 (1960-03-01), Johnson
patent: 3579903 (1971-05-01), Stewart
patent: 4143485 (1979-03-01), Stewart
patent: 4483097 (1984-11-01), Piper
patent: 4490451 (1984-12-01), Leady
patent: 4897067 (1990-01-01), Piper
patent: 4927399 (1990-05-01), Mueller
patent: 4960400 (1990-10-01), Cooper
patent: 5061220 (1991-10-01), Cooper
patent: 5222903 (1993-06-01), Parrott et al.
patent: 5234369 (1993-08-01), Forbes et al.

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