Abstract: A golf club head having a sweet spot area of lighter weight than the perimeter surround it. The sweet spot area on the front of the club is filled with a lightweight material that extends toward the rear of the club and is both lighter in weight than the surrounding club head material and having a light transmitting quality. The material may serve as a light passageway for sunlight to travel from the rear of the club to the front face of the club and so illuminate the sweet spot on the front face of the club.

Abstract: An improved weighted golf iron and method of making same comprising adding a divider to a cavity in the iron, the divider dimensioned to be contained within and traverse the cavity walls, and providing means for anchoring the divider to the walls.

Abstract: A golf club head made of a fiber-reinforced resin, at least the outermost layer of the face thereof being composed of a cloth-reinforcing material impregnated with a matrix resin containing whiskers mixed therein so that the edges of the scoring lines will be composed of the matrix resin containing the whiskers mixed therein.

Abstract: A durable wooden golf club head is disclosed having a hitting face with a non-wooden durable insert that is screw threaded into the head whereby the wooden head and face are protected from deterioration upon impact by a golf ball. The wooden head is made by screw threading the insert into a matching socket and causing a hardenable liquid adhesive to hydraulically penetrate the head from the socket to the surface of the wood whereby the head provides a solid golf ball hitting body.

Abstract: A golf club head for impacting a golf ball is disclosed. A wooden club body has a phenolic insert embedded in the center of the body ball striking face. The insert is secured in place in a vertical channel in the body striking face by solidified epoxy which interlocks communicating passages formed in the sides of the body channel and cavities in the insert. A metal honeycomb structure is supported in a central slot in the insert. A resin compound fills and covers the honeycomb structure. The exterior surface of the resin covering the honeycomb structure provides the intended golf ball impact surface of the golf club head.

Abstract: A golf putter head has a body with a cavity in its front face containing an insert member having a front, ball striking face co-planar with the front face of the body. The insert member comprises a honeycomb cellular structure with the cells of the structure filled with a resilient, epoxy material. The walls of the cellular structure are mounted in the cavity perpendicular to the inclined club striking face surface and have exposed cell edges co-planar with the surface of the resilient material and the club striking face surface for simultaneously impacting a golf ball. The putter head is further formed to have an upwardly curving sole. A curved neck attaches the head to the club shaft to position the striking face in line with the axis of the club shaft.

Abstract: Improved tennis racket in which an inverted chevron shaped yoke is provided having downward sloping side portions which match the curvature of the arcuate top portion of the racket head to provide vertical strings extending between the yoke and arcuate top portion which are of the same length. The equal length of vertical strings provide uniform elastic response to ball impact. The particular design of the chevron provides added structural strength to the neck of the racket. An improved racket made from a polycrystalline metal oxide fiber and resin matrix is also disclosed. In addition, an improved string protection system involving elastomer inserts which are molded into the head portion of composite material rackets is described.

Abstract: A molded composite racquet is provided, wherein the frame of the entire racquet is prepared using the combination of continuous graphite fibers longitudinal within the shape of the frame, wrapped in a bias arrangement with layers of fiberglass, that combination being covered by a protective resinous outerlayer. The presence of the graphite fiber in a unidirectional orientation around the hoop of the racquet in the plane of the strings increases the resistance against compression with minimal affect on the flexibility, bending or torsion, of the racquet. The concentric and bias orientation of the fiberglass layer supplies sturdiness to increase the resistance to torsion and bending stress. The molded composite racquet achieves a controlled impulse duration during impact with a game ball which provides greater control during impact and less shock to the user of the racquet during the recreation.

Abstract: Improved fiber resin matrix prepreg fabrics are disclosed which are comprised of a first layer of reinforcing fabric coated with an epoxy resin composition and a discrete second layer of an epoxy resin modified with an elastomeric polymer. The discrete second layer is provided with a support comprising a gauze-like, lightweight fibrous mat or carrier of lightweight fibers that preserves the second "interleaf" layer during cure. Cured composites having the continuous interleaf layer intact exhibit high impact strength and resistance to impact damage.

Abstract: The present invention provides a method for preparing an inlay in golf irons which includes preparing an iron having a large cavity in its back and placing a preselected number of small weights in the bottom inner spline of the club and covering said weights with a first layer of epoxy. A second layer of epoxy having a decorative material included is placed over the first layer shortly after the first layer has set. During the setting of the second layer it is swirled a number of times. A protective coating is applied over the second layer after it has substantially cured.

Abstract: Prepolymerized resins are applied to wooden articles to coat them and impart a tough and abrasive resistant surface which protects the articles from deterioration and delamination due to shock, impact and abrasive forces. The resins are applied by contacting the articles with a prepolymerized resin which has been dissolved in a readily vaporizable solvent to form a resin solution, coating the article with the resin solution, vaporizing the solvent from the resin coating and drying the resin coating. The coated articles find particular utility in high shock and impact uses such as hockey stick blades.

Abstract: An exercising device utilizes a plate member pivotably and rotatably secured to a surface mounting plate. A pair of handles are eccentrically disposed outwardly from a shaft journalled to the plate. The shaft passes through an opening in the plate which partially houses a wheel fixedly secured to the shaft. A threaded rod is utilized to exert a variable drag force on the marginal edge of the wheel by applying an inwardly directed force to a bar carried at one end of the threaded rod. Positioning the plate member and locking same relative to the mounting plate permits the access of the shaft to be positioned in preferred operating locations.

Abstract: A novel bicycle frame has a plurality of tubular elements interconnected with lugs to a generally diamond shape. The tubular elements have a metal core and a fiber-reinforced plastic skin. The fibers in the skin have a specific predetermined angle of orientation whereby the bending and torsional characteristics are balanced to enhance the stability and strength of the frame at significantly low weights.

Abstract: Improved tennis racket in which an inverted chevron shaped yoke is provided having downward sloping side portions which match the curvature of the arcuate top portion of the racket head to provide vertical strings extending between the yoke and arcuate top portion which are of the same length. The equal length of vertical strings provide uniform elastic response to ball impact. The particular design of the chevron provides added structural strength to the neck of the racket. An improved racket made from a polycrystalline metal oxide fiber and resin matrix is also disclosed. In addition, an improved string protection system involving elastomer inserts which are molded into the head portion of composite material rackets is described.