摘要:
A sports racquet includes a power ring, spanning the throat region of the head, which has an arcuate bearing surface facing away from the outer head portion of the racquet. The bearing surface bows in the direction of the stringing area. The lower ends of the main strings wrap about the bearing surface of the power ring, and the strings extend outwardly in a fan shape configuration to frame. The power ring has the effect of shortening the center strings, and lengthening the outlying main strings, so that the power provided by the strings is more uniform over the string bed.
摘要:
A method for stringing a racquet characterized by forming a linearly expansible pre-strung web having a plurality of rows of diamond shaped interstices and then stretching said web row-by-row along a linear axis of expansion by starting with the innermost rows of the web and proceeding symmetrically outwardly to the outermost rows of said web. As a final step, the linearly expanded web is laced to the head of a racquet. An apparatus for accomplishing the above method is characterized by an elongated base supporting a pair of carriages for reciprocal, colinear movement. A plurality of stretcher bars are supported by the base between the carriages to stretch the web row-by-row away from a central axis. Links are provided to selectively couple the stretcher bars to the carriages.
摘要:
Strung rackets for hitting compressible balls have a stringing network that can be adapted to provide for an expanded sweetspot; precise diminution of dead spots especially at the top of the racket; reduced string wear; controllable areal stiffness for hard hitting; prolonged dwell time of the ball on the racket for directional control of the ball; and increased frictional contact between ball and racket for improved stroking, and application and control of spin to the ball. The rackets employ predetermined patterns and concentrations of string in predetermined areas within the racket frame to provide stringing networks complemental and functional to the particular characteristics of an individual player. Downwardly flared string crossings and multiple strand reentrant string crossings are used alone and in combination to provide the predetermined patterns and concentrations. The multiple strand reentrant string crossing structures include parallel, anti-parallel, and double or triple spiraling strands formed by reentering strings in multiple traverses across the frame through the same pair of opposed frame holes.
摘要:
A gaging stop is disclosed for use with a press brake which employs a direct drive servo motor directly coupled to a movable table and linear encoder directly coupled to the movable table for providing electrical output signals representative of actual gage position. One or more gage stop assemblies are supported by the movable table and are manually adjustable to both coarse and fine degrees. Closed loop servo control of gage position is provided to control motor drive in response to actual position signals derived from the linear encoder.
摘要:
A racket and its method of manufacture which racket has three sets of string segments having particular angles among string sets and having certain stringing sequences. Strings and racket frames may be color coded and the frame may carry stringing instructions. Stringing is aided by use of a stringing clamp.
摘要:
A sports racquet has a head frame that includes a support member and an inwardly directed alignment member or fin. String segments are strung from a central strung area through respective holes in the fin, around the support member and back through further holes in the fin. The present invention provides a strong anchor for the strings which can withstand the static load thereof as well as dynamic loading placed on it by striking gamepieces as well as striking other objects. In a preferred embodiment, the fin returns the string segments to a strung area that is substantially planar up to the inner periphery of the fin.
摘要:
A single piece molded sports racket includes a string frame defining an interior opening, a throat portion extending from the string frame and an integral grip/handle extending from the throat portion. The string frame further supports an integrally formed inwardly extending string flange having a plurality of apertures with corner radii extending therethrough. The string frame may be strung from either side facilitating the positioning of the string plane of the racket at alternative offset positions with respect to the center plane of the string frame of the racket. Embodiments are shown which provide for alternative string plane positions either tangential to one edge of the string frame or offset therefrom. In alternate embodiments, the position of the string frame may be selected between alternatives of coplanar alignment with the center plane of the frame or offset or tangential to the frame edge.
摘要:
A novel games racket frame, particularly a squash racket frame is asymmetric in that the cross-section of the head portion measured perpendicular to the plane in which the strings will lie varies. Preferably the frame is strung in a "double fan" pattern i.e. the longitudinal strings diverge from the head portion adjacent the shaft portion and the cross-strings diverge from one side to the other.
摘要:
This invention relates to a games racket, such as a tennis or squash racket, including a handle intended to be held in the hand, and carrying a head having an open marginal frame defining a central opening across which extends tensioned stringing carried by the head frame. Instead of being located in a single plane disposed centrally of and bounded by the head frame, the stringing of a racket embodying this invention is disposed in two generally parallel planes located on opposite sides of the frame, i.e. on opposite sides of the opposite side surfaces of the frame, and separated by a distance approximating the thickness of the frame. An elongate strip of a relatively hard synthetic plastics material extends around the central opening, and in a preferred embodiment, this strip overlies the outer peripheral surface of the frame and is provided with a plurality of stringing-receiving apertures distributed around the central opening, disposed outwardly of the outer peripheral surface, and spanning the opposite side surfaces of the frame.