Abstract A linkage for driving a foot-operated bass drum pedal in which the conventional leather strip interconnecting the toe end of the pedal and a transversely mounted shaft carrying means for securing the pivoting end of the drum stick is replaced by a sprocket chain engaging a sprocket on said shaft. Coarse adjustment of the length of stroke is obtained by shifting the mounting means on the shaft, and fine adjustment is obtained by shifting the end point of the chain with respect to the particular teeth engaged on the sprocket. The last link of the sprocket end of the chain is secured by pintel or cotter key means extending through one of a plurality of transversely extending holes located at the periphery of the sprocket adjacent the inner ends of the teeth thereof.
Here a foot-operated bass drum pedal, including a frame element having a generally horizontally oriented shaft pivotally supporting an end of a drum stick, pedal means for rotating said shaft, improved means for linking said pedal and said shaft comprising: a toothed sprocket adjustably positioned for coaxial rotation with said shaft, a sprocket chain entrained upon said sprocket having first and second ends, said first end being pivotally interconnected to a forward end of said pedal, said second end being selectively fixed to one of the plurality of spaced points on the periphery of said sprocket.
Claim 2
Dependent Claim
96 words
Here a foot-operated bass drum pedal, including a frame element having a generally horizontally oriented shaft pivotally supporting an end of a drum stick, pedal means for rotating said shaft, improved means for linking said pedal and said shaft comprising: a toothed sprocket adjustably positioned for coaxial rotation with said shaft, a sprocket chain entrained upon said sprocket having first and second ends, said first end being pivotally interconnected to a forward end of said pedal, said second end being selectively fixed to one of the plurality of spaced points on the periphery of said sprocket.
Claim 3
Dependent Claim
44 words
Structure in accordance with claim 1, further characterized in said sprocket having a plurality of through holes extending perpendicular to the plane thereof in the area of said periphery, and end link of said sprocket chain being selectively pinned at one of said openings.