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US 7,598,445 B1Granted
Detonator with cushioned mallet
OwnerDarrell N. Johnstoninventor
Life of this patent
Estimating the term…
Abstract
A cantilever spring carrying a mallet with a low friction tip.
Claims16
A bass drum actuator apparatus comprising:
- a foot pedal device including a stanchion, a shaft journal across the top of the stanchion, and a rotary shaft rotatable within the journal from a first to a striking position;
- a compact trigger box mounted to the stanchion adjacent the shaft and including a transducer interacting with a vertically facing impact surface;
- a mounting bracket clamped to the rotary shaft for rotating from a retracted position to an impact position when the shaft is rotated from the first to the striking position;
- a compact spring wire lever arm projecting cantileverly from the bracket end and terminating in a free end, the lever arm comprising two or more coils medially along the arm and the free end displaced angularly at 90 degrees or more with respect to the bracket;
- a mallet carried on the angularly displaced free end and including a low friction tip constructed to, when the shaft is in the striking position, hit the impact surface.
2 more elements
A bass drum pedal apparatus comprising:
- a pedal device including a stanchion, a shaft journal across the top of the stanchion, and a rotary shaft rotatable within the journal from a first to a striking position;
- a compact trigger box mounted to the stanchion adjacent the rotary shaft and including a transducer interacting with a vertically facing impact surface;
- a mallet shiftable from a retracted to a striking position, comprising a hammer portion and a lever arm portion;
- a low friction beater on one end of the hammer constructed to, when the mallet is in the striking position, engage the impact surface;
- and
- a linkage carrying the hammer comprising a helical torsion spring, a shaft engagement end and a free end operable to, upon the shaft rotating to the striking position, shift the mallet from the retracted to the striking position to yieldingly engage the impact surface with the low friction beater.
3 more elements
A bass drum actuator apparatus comprising:
- a foot pedal device including a rotary shaft rotatable from a first to a striking position;
- a trigger box mounted to the foot pedal device adjacent the shaft and including a transducer with a working surface;
- a C-shaped mounting bracket constructed with a main body and a cantileverly mounted, resilient clamping arm originating at one side of a through hole clamping bore and terminating in a free extremity, the body being formed with a threaded bore aligned with the free extremity and the free extremity being formed with a through hole clamping bore aligned with the threaded bore;
- a thumb screw received in the through hole clamping bore and having a shank screwed into the threaded bore;
- a torsion spring lever arm affixed on one end to the main body formed with a medial a coil spring and a free end projecting distally therefrom to terminate in a shank;
- a metallic mallet including a barrel formed with an axial through hole threaded mallet bore and a diametrically projecting fastener bore;
- an externally threaded, elongated nylon plug received in one extremity of the through threaded mallet bore and projecting therefrom to form a low friction tip configured and arranged to, when the shaft is rotated to the striking position, engage the working surface of the transducer, and an externally threaded set screw received threadably in the end of the mallet opposite the one end and engaging the shank to secure the mallet to the spring lever arm.
4 more elements
Dependencies are inferred from the claim text.