Abstract: A heat engine includes a first rotatable pulley and a second rotatable pulley spaced from the first rotatable pulley. A shape memory alloy (SMA) element is disposed about respective portions of the pulleys at an SMA pulley ratio. The SMA element includes a first wire, a second wire, and a matrix joining the first wire and the second wire. The first wire and the second wire are in contact with the pulleys, but the matrix is not in contact with the pulleys. A timing cable is disposed about respective portions of the pulleys at a timing pulley ratio, which is different than the SMA pulley ratio. The SMA element converts a thermal energy gradient between the hot region and the cold region into mechanical energy.

Abstract: The present invention has an object of providing a toothed cable 1 not to cause an unnecessary load on a motor or the like, not to cause tear in the cover layer and to have excellent durability. The present invention provides a toothed cable 1 comprising a core cable 2, and a tooth line 3 helically wound on the outer periphery of the core cable 2. The toothed cable 1 further comprises a cover layer 4 covering the outer surface of the core cable 2 and the tooth line 3 with a resin continuously. This toothed cable 1 has helical convex portions 41 formed by covering the tooth line 3 with the resin and helical concave portions 42 formed by covering intervals in the tooth line with the resin, and the covered layer 4 is in contact with the core cable 2 and the tooth line 3.

Abstract: An on-machine-seamable industrial belt comprising a coated spiral base with a pin seam that offers easy installation, durability, high surface friction, and strength. The belt construction includes a helical spiral base produced from primarily polyester monofilament or blends thereof. The coating material is a liquid silicone rubber elastomer of Shore A durometer 15-50. The coating penetration encapsulates at least the top spiral filament and extends beyond the top surface of the base. The seam strength is substantially equal to that of the fabric body.

Abstract: A composite endless power transmission belt has a resilient plastic outer tubular member with a cylindrical bore, and an inner coil spring member extending wholly and slidably within the cylindrical bore and endlessly through the bore. Assembly is by inserting the spring into the tubular member and screwing a reduced diameter end of the spring into the larger diameter spring end to form an endless belt. The lengths of both members are selected such that when uninstalled, the outer member is in compression and the inner member is in tension, yet when installed, the outer member is partially or completely decompressed and the inner member is in optimal operating tension.

Abstract: A variable speed drive comprising two drives, an output drive wheel and an endless, extendible member that is driven by the drives and extends around and rotates the output drive wheel. The drives are operable to move the endless member around an endless path at a first speed at a first driving position and at a second speed at a second position. This causes local expansion or contraction of the endless member around the output drive wheel and so varies its speed.

Abstract: A variable speed drive comprising two drives, an output drive wheel and an endless, extendible member that is driven by the drives and extends around and rotates the output drive wheel. The drives are operable to move the endless member around an endless path at a first speed at a first driving position and at a second speed at a second position. This causes local expansion or contraction of the endless member around the output drive wheel and so varies its speed.

Abstract: Disclosed is a transfer belt for an electro-photographic apparatus, comprising a seamless reinforcing layer made of a continuous string, and a semi-conductive rubber layer formed on the reinforcing layer.

Abstract: A double helix is formed from two partial helices each having the same winding direction and each having an oval cross-section with nearly straight upper and lower winding legs. The facing winding arcs of the two partial helices encircle each other. The upper winding legs of the partial helices extend at a different angle with respect to the longitudinal axis of the partial helices than the lower winding legs of the respective partial helix. The upper winding legs of one partial helix extend at the same angle with respect to the longitudinal axis as the lower winding legs of the other partial helix and vice versa.

Abstract: Drive belts for tape cartridges featuring a base belt of low coefficient of elasticity with an elastomeric coating having a high coefficient of friction. Three examples of such belts are: (1) polyimide or polyester film base belts with a thin elastomeric film coating; (2) nickel, copper or steel base belts with a thin elastomeric film coating and (3) spirally wound filaments of high modulus of elasticity within an elastomeric matrix having a low modulus of elasticity, the filaments forming the base belt and the elastomeric matrix forming the coating on the base belt, holding the spiral loops in place.

Abstract: A method is disclosed for preparing polypropylene endless loop by blow-moulding polypropylene raw materials into tubular sheet, drawing the same transversely to an extent to provide a draw ratio of at least 4, and before or after the drawing step, cutting the tubular sheet to form individual endless loops, then twisting the cut and drawer loops to provide a twisted endless loop. The preferred polypropylene endless loop product is also disclosed.