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A magnetorheological piston includes a magnetorheological-piston coil and a magnetorheological-piston core. The magnetorheological-piston coil has a longitudinal axis. In one expression, the magnetorheological-piston core includes at least two separate core pieces, wherein each of the core pieces is

A magnetorheological piston includes a magnetorheological-piston coil and a magnetorheological-piston core. The magnetorheological-piston coil has a longitudinal axis. In one expression, the magnetorheological-piston core includes at least two separate core pieces, wherein each of the core pieces is a powder-metal core piece, and wherein the coil is positioned to circumferentially surround at least a portion of at least one of the core pieces. In another expression, the magnetorheological-piston core includes separate upper core, center core, and lower core pieces. The center core piece is located longitudinally between the upper core and lower core pieces and has a circumferential surface positioned radially inward from the inner-diameter portion of the coil. The coil is longitudinally positioned between the upper core and lower core pieces. In one example, each of the upper core, center core, and lower core pieces is a powder-metal core piece.

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A magnetorheological piston includes a magnetorheological-piston coil and a magnetorheological-piston core. The magnetorheological-piston coil has a longitudinal axis. In one expression, the magnetorheological-piston core includes at least two separate core pieces, wherein each of the core pieces is

A magnetorheological piston includes a magnetorheological-piston coil and a magnetorheological-piston core. The magnetorheological-piston coil has a longitudinal axis. In one expression, the magnetorheological-piston core includes at least two separate core pieces, wherein each of the core pieces is a powder-metal core piece, and wherein the coil is positioned to circumferentially surround at least a portion of at least one of the core pieces. In another expression, the magnetorheological-piston core includes separate upper core, center core, and lower core pieces. The center core piece is located longitudinally between the upper core and lower core pieces and has a circumferential surface positioned radially inward from the inner-diameter portion of the coil. The coil is longitudinally positioned between the upper core and lower core pieces. In one example, each of the upper core, center core, and lower core pieces is a powder-metal core piece. r rope pulley and the guide elements acting together with the car guide rails being connected to said frame structure. 8. The traction sheave elevator as defined in claim 7, wherein the car rope pulley is disposed inside a space defined by the elevator car and the frame structure. 9. The traction sheave elevator as defined in claim 3, wherein the car rope pulley is placed in the lower part of the elevator car near its bottom. 10. The traction sheave elevator as defined in claim 3, wherein a vertical tangent to the upper rope pulley is substantially aligned with a vertical tangent to the counterweight rope pulley, the rope portion between these pulleys thus being substantially vertical. 11. The traction sheave elevator as defined in claim 3, wherein a vertical tangent to the upper rope pulley is substantially aligned with a vertical tangent to the car rope pulley, the rope portion between these pulleys thus being substantially vertical. 12. The traction sheave elevator as defined in claim 3, wherein a middle plane of rotation of the counterweight rope pulley is parallel to a middle plane of rotation of the car rope pulley, and a middle plane of rotation of the upper rope pulley is at an angle to the middle planes of rotation of the car rope pulley and counterweight rope pulley. 13. The traction sheave elevator as defined in claim 12, wherein the middle plane of rotation of the car rope pulley is parallel to the side wall of the elevator car. 14. The traction sheave elevator as defined in claim 12, wherein the middle plane of rotation of the car rope pulley is at an angle to the side wall of the elevator car. 15. The traction sheave elevator as defined in claim 3, wherein the drive motor is a permanent magnet synchronous motor and that the upper rope pulley is integrated with the rotor of the motor. 16. The traction sheave elevator as defined in claim 1, wherein the car rope pulley is below a top of the elevator car. 17. A traction sheave elevator comprising: an elevator car suspended on hoisting ropes by a diverting pulley, an upper rope pulley, and a car rope pulley, wherein the car rope pulley is mounted on a side and above a bottom of the elevator car, and a middle plane of rotation of the upper rope pulley is at an angle to a middle plane of rotation of the car rope pulley. 18. The traction sheave elevator as defined in claim 17, wherein a hoisting machine of the traction sheave elevator is located in the elevator shaft. 19. The traction sheave elevator as defined in claim 17, wherein the car guide rails are disposed in an elevator shaft in a vertical direction, and the elevator car is designed to move along the car guide rails, and further comprising: counterweight guide rails disposed in the elevator shaft on the same side of the elevator car as the car guide rails; a counterweight designed to move along counterweight guide rails; an upper rope pulley mounted on a fixed top structure in the upper part of the elevator shaft; a car rope pulley connected to the elevator car; the diverting pulley being a counterweight rope pulley connected to the counterweight; a drive motor disposed in the elevator shaft to drive one of the rope pulleys; and a rope, whose first end is attached to a fixed top structure in the upper part of the elevator shaft on the same side of the elevator car with the car and counterweight guide rails, from where the rope is passed via the counterweight rope pulley, upper pulley and car rope pulley, and whose second end is attached to a fixed top structure, a second end of the rope being attached to a fixed top structure on the same side of the elevator car as the first end; and bearings rotatably mounting the car rope pulley at the side of the elevator car on the same side of the elevator car as the car and counterweight guide rails. 20. The traction sheave elevator as defined in claim 19, wherein the car guide rails and counterweight guide rails are attached to each other and to a wall o