Abstract: A golf ball, comprising:a core;an inner cover layer formed over the core, the inner cover layer having a Shore D hardness of at least 60 as measured on the curved surface thereof, andan outer cover layer formed over the inner cover layer, the outer cover layer having a Shore D hardness of no more than 53 as measured on the curved surface thereof,at least one of the inner and outer cover layers comprising at least one member selected from the group consisting of polycarbonates, reaction-injection-molded polyurethanes, and styrene-butadiene elastomers,the golf ball having a PGA compression of 100 or less and a coefficient of restitution of at least 0.750.

Abstract: A golf ball includes a hollow core formed of a material having a specific gravity of 1.05-1.25 and having a concentric spherical inner cavity, a cover formed on the outer surface of the hollow core, and a resin layer applied onto the inner surface of the hollow core and having a thickness of 1-3 mm. The resin layer is preferably formed of a material having an Izod impact resistance of 50 J/m or greater. The hollow core preferably has a wall thickness of 7-11 mm. The Shore D hardness of the resin layer is preferably greater than that of the hollow core by at least 10. The golf ball does not suffer breakage of the hollow core due to an impact acting on the golf ball upon being hit, and has proper degrees of hardness and resilience in order to increase travel distance.

Abstract: A bow limb includes an elongated member having a plurality of strands of glass fiber extending longitudinally within the member and a reinforcing sheet adjacent a major surface of the member, preferably the convex surface of the limb when the limb is flexed. The sheet includes a plurality of carbon fibers that are either unidirectional or bi-directional and, if bi-directional, are woven with the warp of the fibers at an angle to the length of the limb. The angle is adjusted to control the characteristics of the limb.

Abstract: A disc which is used as a game piece for playing a game known as "Milk Caps"or "POGS". At least one side of the disc is decorated. The disc makes a metallic sound when it is dropped, thrown or slammed against a solid playing surface. The disc is preferably made of a strong plastic such as polyphenlene sulfide which prevents the disc from shattering. The disc may have an annular lip along its edge which facilitates manufacturing. The edge of the disc may be sloped or angled wherein the bottom portion of the disc has a slightly larger diameter than the top portion of the disc. This also facilitates manufacturing.

Abstract: A golf putter head having a toe and heel and a ball striking face comprising a metallic core generally in the shape of the head but contained within the head, the core having toe and heel portions; weight structure located within the core proximate the toe and heel portions; and a relatively thin, non-metallic shell molded about the core and the weight structure.

Abstract: Decorative or display device for game-playing, amusement or aesthetic purposes comprises a three-dimensional array of switchable indicators in a transparent matrix. The indicators may be light sources e.g. led's and may be used to play games such as noughts and crosses in 3-dimensions. A non-electric version has a stack of separable layers with beads insertable in recesses.

Abstract: This invention discloses a novel head of a golf club, especially of the type called "wood". The head includes a foamed core means therein which is firm with a light weight. The head also includes a face directly attached to the core means. The core means with the face is molded over with a shell. The inclusion of the core enables the head to be big with a light weight. The direct attachment of the face to the core means enables avoidance of deviation of the face relative to the core means over long use.

Abstract: A portable and foldable two-piece alignment training device for golfers includes two sets of elongated strips, each set having three strips hingeably joined at their first ends. The two strip sets are joined together by an adjustable slide clip and placed on the ground to form an "I". The "I" pattern keys the golfer to align his swing thereto. Indicia indicate tee position, the golfer's body and foot position, flight direction of the ball, and retraction distance of the club from the tee.

Abstract: An iron type golf club head having the whole or the central part of a ball striking face thereof, which directly touches a golf ball, fabricated from a material possessing a compression Young's modulus (modules of longitudinal elasticity) lower than that of steel.

Abstract: The invention relates to a frame for a games racket e.g. tennis, of the type made as a hollow injection moulding of reinforced thermoplastics material. The frame has attachments for stringing in the form of a series of discrete lugs moulded integrally with the walls of the hollow frame and so positioned that the racket strings in their desired positions do not pass to the outer periphery of the head. The discrete lugs may for example be around the inner periphery of the head of the frame and each contain an integrally-moulded circumferential bore for string passage. The frame may be made by injection moulding around a fusible core and the shape of the core required to give the desired lugs provides strong resistance to movement under the injecting pressures hence giving improved product uniformity.

Abstract: A nighstick comprising an elongated cylindrical main body portion and a generally cylindrical handle portion which is integral with the main body portion and extends at a right angle to the central longitudinal axis of the main body portion. The handle portion is spaced from both ends of the main body portion and is substantially closer to one of the ends. The invention includes a nightstick in which the handle and main body portions are molded as a single integral unit of thermoplastic polycarbonate material. The invention also includes a nightstick as described above which consists of a T-shaped metallic core embedded in thermoplastic material and the method of making same. Another variation of the invention includes a nightstick in which the main body portion is covered by an outer layer of elastomeric material. Still another variation of the invention includes a nightstick in which the main body portion and the handle portion each consist of a metal tube filled with elastomeric material.

Abstract: A golf ball having compression strength greater than 7000 kg-f and rebound height greater than 90/120, said golf ball comprising a rubber composition filled with 10 to 40 parts by weight of calcium carbonate based on 100 parts by weight of the rubber, the calcium carbonate having a BET specific surface area of 60 to 300 m.sup.2 /g and a particle diameter of 0.035 to 0.010 micrometers.

Abstract: The golf club head comprises a shaped core body of material selected from synthetic and natural rubber and an outer shell closely surrounding substantially the entire surface of the core body of polymeric thermoplastic material selected from the group of polycarbonate, polyamide and polybutylene-terephthalate. According to a preferred embodiment, the golf club head further comprises a center core body embedded within the core body and consisting of closed envelope completely filled with liquid.

Abstract: An injection molded baseball bat with a core of thermoplastic plus a blowing agent and a solid skin of thermoplastic per se injected into the mold at one and the same time. The skin and core may be of the same or of different thermoplastic. The baseball bat is a unitary structure of superior strength and finish with the foamed core and solid skin fused together.

Abstract: A jump rope has tubular handles, each configured with a deeply set annular recess at one end to provide a bearing surface for receiving the knotted end of the rope, and a bell shaped curvilinear egress port at the opposite end on the handle adjacent to which is strung on the rope a substantially spherical bead for preventing jamming of weighting links on the rope into the handle.

Abstract: A uniquely constructed playing court having a generally rectangular configuration comprising front, rear and side walls and/or ceiling wherein the front and side walls are a composite of integrated prefabricated panels, the inner facing surfaces of said panels being sheets which, according to one highly unique aspect of the invention, are of polycarbonate material, said sheets being mounted upon corrugated members whose corrugations are filled with a high density foam and the space surrounding said corrugations is filled with a low density foam. Vertical conventional studs are used to mount the panels by using appropriate fastening means between the studs and the rear surface of the panels. In a particular configuration, clips are welded to the inner facing flanges of the studs, and mating clips are welded to the apices of the corrugations of the corrugated backing sheet so that the panels may be attached upon the studs in adjacent and adjoining relationship.

Abstract: A dart includes a flexible plastic tip having a comparatively blunt point and is adapted to be thrown at a dart board having an array of target plates formed with holes for receiving and holding the tip. Each target plate shifts inwardly upon being struck by a dart and effects closing of a switch for producing a scoring signal.

Abstract: There is disclosed a method of practicing ball games in particular golf in which a target is positioned on the correct flight path of the ball and the sound emitted when a correctly struck ball hits the target is used as a measure of the distance which would have been travelled by the ball. An adjustable target and apparatus incorporating the target are also disclosed.

Abstract: A molded, plastic tennis racket frame is described which is constructed of a combination of glass fiber reinforcement and carbon fiber reinforcement to provide a low specific gravity composite when incorporated in resins which are reinforced by these materials and to permit construction of a tennis racket having a general shape of conventional wooden rackets. The tennis racket is constructed as a unitary piece utilizing foamed resins reinforced with the glass fibers and carbon fibers. Specific weight percentages of glass fibers and carbon fibers are designated for maximum strength, flexibility and good playing characteristics.