Patent ID: 6417432
Filing Date: 2002-07-09
Classification: G10D

Abstract:
A drum head tensioning assembly comprising any combination inner intermediate hoop and outer hoop rim, said inner intermediate hoop being essentially L-shaped in cross sectional view and comprising of vertical flange, and outward directed foot-flange, said outer hoop rim overlaps the upper portion of said inner intermediate hoop;(a) an annular step formed in the lower inner edge of said outer rim to accommodate a locking hoop, said drum skin being secured between said locking hoop and said annular step; (b) means co-acting with said rims for varying the tension of said skin by varying the extent of overlap between said rims; (c) a drum shell with an outside diameter being smaller than the inside diameter of said intermediate hoop; (d) said drum shell upper perimeter bearing edge passing through intermediate hoop to contact said upper head said drum shell being of smaller outside diameter to insure avoidance of contact with larger inside diameter of said intermediate hoop; (e) second opposing drum head placed over opposite perimeter bearing edge of said drum shell secured by second outer hoop rim adapted to maintain other drum skin in abutting force against lower perimeter edge of said drum shell said drum shell being of cylindrical configuration; (f) a tension varying means in the form of a set of aligned apertures in said outer ring of said foot flange and threadable tension rod extending through said apertures for torquing down the assembly in overlapping position with the intermediate rim and received by a plural of aligning tension posts extending parallel to said shell; (g) said shell being placed inside intermediate hoop with said perimeter bearing edge contacting upper head, second hoop rim has been tensioned to meet with opposing drum head against lower part of drum shell perimeter bearing edge; (h) a plural of tuning posts to interlock upper outer said rim and said intermediate hoop to said lower head and said secondary rim after said shell has been placed in assembly.