Racquet having centralized sweet spot

Claim 1

A racquet comprising: (a) an elongate member having a substantially uniform linear density; (b) a first straight portion of said elongate member at one end thereof; (c) a first arcuate portion of said elongate member extending from said first straight portion and turning in an anticlockwise sense as the line of the member is followed in a direction away from said one end; (d) a loop portion of said elongate member extending from said first arcuate portion, having the shape of the greater part of a geometric circle, lying in the same plane as said first arcuate portion, and turning in a clockwise sense, the curve of said arcuate portion extending substantially the whole of the distance from said first straight portion to said loop portion; (e) a second arcuate portion of said elongate member extending from said loop portion, said second arcuate portion having the same shape as said first arcuate portion but being a lateral inversion thereof and lying symmetrically adjacent thereto; (f) a second straight portion of said elongate member at the other end thereof extending from said second arcuate portion, and lying parallel with and adjacent to said first straight portion; (g) a bridging portion having substantially the same linear density as said elongate member and completing the geometric circle of which said loop portion forms the greater part, to define a head of said racquet; (h) a first set of strings of said head; (i) a second set of strings which extend transversely of the first set, in which the longitudinal centre line of each set substantially bisects each and every string of the other set, in which both sets have a mirror symmetry about their longitudinal centre lines, in which for each and every string for one set there is a string of substantially equal length in the other set, and in which the centre lines of the two sets intersect substantially centrally in relation to the geometric centre of the racquet head; (j) a hand grip which surrounds said two straight parallel portions of said elongate member; and (k) an open throat of said racquet defined by said first and second arcuate portions and said bridging portion; said racquet including means for locating the sweet spot of the racquet at the geometric centre of the circular racquet head, said means comprising: a combination of said open throat, said bridge portion having substantially the same linear density as said elongate member and the weight of the racquet half located closest to said grip being substantially the same as the weight of the racquet half located farthest from said grip.