Abstract:
An elastomeric electrode having an electrically conductive base, a protective layer enclosing the base formed of an elastomeric material having electrically conductive material selected from the group consisting of highly conductive carbon black, graphite, and glassy carbon distributed therein and present in the amount of 10 to 30 parts by weight to 100 parts by weight of the elastomeric material. A terminal extends from the base to exteriorly of the protective layer.
Abstract:
A power transmission belt manufacture wherein a modified rubber blend is utilized as at least one portion of the belt, with the blend including a silane coupling agent, silica and carbon black. The blend is advantageously adapted for use as the cushion rubber embedding the load-carrying cords of the belt. The invention comprehends the use of the blend further as at least one of the compression and tension sections of the belt, as desired. The modified rubber blend is advantageously utilized in power transmission belts having widely varying configurations and characteristics.
Abstract:
An acrylic copolymer composition capable of being vulcanized with sulfur comprising the radical polymerization product of (1) a monomer mixture comprising an acrylic acid ester and ethylidene norbornene, (2) a monomer mixture comprising an acrylic acid ester, ethylidene norbornene and acrylonitrile, (3) a monomer mixture comprising an acrylic acid ester and vinyl norbornene, or (4) a monomer mixture comprising an acrylic acid ester, vinyl norbornene and at least one unsaturated compound selected from the group consisting of monovinyl compounds, monovinylidene compounds and monovinylene compounds.
Abstract:
A tensile cord manufacture wherein polyester multifilament cords are heat treated and drawn to provide tensile cords for use in power transmission belts. Preselected characteristics of the original cord, parameters of heat treating and drawing, and characteristics of the formed tensile cords required to provide the improved features of the invention are set forth.
Abstract:
A toothed belt having a fabric adhered to the toothed portion of the belt formed of synthetic resin yarns having an ultimate viscosity of greater than approximately 1.30. In the illustrated embodiment, the yarns extending in the longitudinal direction of the belt are fully processed yarns. The cloth is preferably a woven cloth wherein one or the other of the weft and warp are wooly processed. The use of the disclosed cloth provides a substantial improvement in resistance of the belt to cracking and shearing of the teeth in use.
Abstract:
A manufacture of an impact-resistant power transmission belt tensile cord and belt using the same. The tensile cords of the invention are caused to have coordinated characteristics of toughness, elongation under load, shrinkage, and shrinkage stress so as to provide absorption of longitudinal and transverse impact shock forces to the belt during high power transmission therethrough, with minimized dimensional changes of the belt over the useful life thereof, permitting the belt to be utilized in multiple parallel drive applications in extremely rigorous environments with minimized maintenance. The tensile cords are adhesively coated, thermally drawn and set multifilament polyester cords.
Abstract:
A tire for a two-wheeled vehicle, particularly, a bicycle intended for a racing purposes having an improved running stability, superior durability and impact resistance, and reduced weight. The tire includes a carcass layer formed by arranging cord belts with a rubber paste coated thereon in such a manner that the cords of the cord belts cross each other. A tube is fitted to the inside of the carcass layer, and a rubber tread portion is bonded to the outer periphery of the carcass layer. The cord belt is produced in bias form with alternately arranged cords superior in durability and impact resistance and cords superior in adhesion with rubber. The two types of cords may be equal in number, or a majority of one of the two types of cords employed, depending upon the precise application of the tire and the conditions under which it is intended for use.
Abstract:
A thermally self-regulating elastomeric composition and heating element made therefrom. The composition includes a body of elastomeric material in which is distributed electrically conductive particulate material, such as carbon black. Short fibers are also distributed in the elastomeric matrix. In the disclosed invention, the short fibers are present in the amount of approximately 0.5 to 20 volume percent. In one alternate form, the matrix is foamed. Different arrangements of the electrodes in electrical conductive association with the thermally self-regulating elastomeric body are disclosed. Preferred proportions and characteristics of the particulate conductive material and short fibers providing optimum thermally self-regulating characteristics of the composition are disclosed.
Abstract:
A toothed power transmission belt (10) is manufactured by an improved method to have substantially improved resistance to tooth root face cracking. The manufacture utilizes a modified rubber blend forming the teeth (15) and may utilize the same blend for embedding the load-carrying cords (14) to provide improved bonding of the teeth (15) to the cords (14) over a wide range of temperatures.
Abstract:
A pressure-responsive variable electrical resistive rubber material including at least one inorganic filler selected from a group consisting of conductive carbon black, short fibers of nonmetallic inorganic material, powder, and whiskers. The filler is dispersed in a matrix formed of an electrically insulative rubber. The rubber material exhibits a gradually reducing resistance value as a gradually increased pressing force is applied thereto. The rubber material provides a wide range of relationship between the applied force and the electrical resistance thereof. The rubber material is adapted for use as a pressure sensor having excellent fatigue creep resistance.