A lift assembly including an article to be lifted between a lowered position and a raised position, a flexible drive element coupled to the article and defining a longitudinal axis, a power mechanism coupled to the flexible drive element, a drum powered by the power mechanism and dimensioned to facilitate winding of the flexible drive element onto the drum, and a cable keeper providing a force on the flexible drive element to bias the flexible drive element toward the drum.

A lift assembly including an article to be lifted between a lowered position and a raised position, a flexible drive element coupled to the article and defining a longitudinal axis, a power mechanism coupled to the flexible drive element, a drum powered by the power mechanism and dimensioned to facilitate winding of the flexible drive element onto the drum, and a cable keeper providing a force on the flexible drive element to bias the flexible drive element toward the drum.

A winch (100, 200) includes a rope (105), an overwinding sensor (106) coupled to the rope (105) where the overwinding sensor (106) is moveable between a first position and a second position upon winding and/or unwinding of the rope (105). The overwinding sensor (106) includes a first electrically conducting member, a contact member (104) having a second electrically conducting member which is contactable by the first electrically conducting member when the overwinding sensor (106) is in the second position. The second electrically conducting member is not contactable by the first electrically conducting member when the overwinding sensor (106) is in the first position. The winch (100, 200) is configured to stop and/or prevent and/or hamper winding of the rope (105) upon establishment of an electrical contact between the first electrically conducting member and the second electrically conducting member when the overwinding sensor (106) is in the second position.

A winch (100, 200) includes a rope (105), an overwinding sensor (106) coupled to the rope (105) where the overwinding sensor (106) is moveable between a first position and a second position upon winding and/or unwinding of the rope (105). The overwinding sensor (106) includes a first electrically conducting member, a contact member (104) having a second electrically conducting member which is contactable by the first electrically conducting member when the overwinding sensor (106) is in the second position. The second electrically conducting member is not contactable by the first electrically conducting member when the overwinding sensor (106) is in the first position. The winch (100, 200) is configured to stop and/or prevent and/or hamper winding of the rope (105) upon establishment of an electrical contact between the first electrically conducting member and the second electrically conducting member when the overwinding sensor (106) is in the second position.

A rotational over travel protection device for preventing over rotation of at least one of a cable, or a component operable with the rotational over travel protection device is provided. The device includes a housing, a rotatable shaft connected to the housing that can rotate relative to the house, and a triggering device supported in the housing and rotatable with the rotatable shaft. The device also includes a first and second rotational limit switch disposed in the housing. The switches are operable to be activated by the triggering device to arrest rotation of the rotatable shaft upon relative rotation of the rotatable shaft and the housing either a first or second rotation direction, respectively, at least 180 degrees from a zero position.

A rotational over travel protection device for preventing over rotation of at least one of a cable, or a component operable with the rotational over travel protection device is provided. The device includes a housing, a rotatable shaft connected to the housing that can rotate relative to the house, and a triggering device supported in the housing and rotatable with the rotatable shaft. The device also includes a first and second rotational limit switch disposed in the housing. The switches are operable to be activated by the triggering device to arrest rotation of the rotatable shaft upon relative rotation of the rotatable shaft and the housing either a first or second rotation direction, respectively, at least 180 degrees from a zero position.

A speed governor assembly and an elevator system. The speed governor assembly includes: a sheave; a centrifugal mechanism mounted on the sheave and rotating together with the sheave; an overspeed protection switch at a first distance from a radial outer side of the centrifugal mechanism; a core ring disposed coaxially with the sheave; and a triggering arm rotating together with the core ring; wherein the centrifugal mechanism engages with the core ring and drives the core ring and the triggering arm to rotate when the sheave reaches a second speed, and the rotation of the triggering arm can contact and trigger the overspeed protection switch.

A speed governor assembly and an elevator system. The speed governor assembly includes: a sheave; a centrifugal mechanism mounted on the sheave and rotating together with the sheave; an overspeed protection switch at a first distance from a radial outer side of the centrifugal mechanism; a core ring disposed coaxially with the sheave; and a triggering arm rotating together with the core ring; wherein the centrifugal mechanism engages with the core ring and drives the core ring and the triggering arm to rotate when the sheave reaches a second speed, and the rotation of the triggering arm can contact and trigger the overspeed protection switch.

A position sensing device for sensing an upper limit position and a lower limit position of a hoisting line for raising and lowering a door leaf of an animal enclosure, the position sensing device comprising a hoisting line pathway for a hoisting line to raise and lower a door leaf of an animal enclosure, an actuator arm moveable between a first position and a second position, and a proximity switch having a first state corresponding to the actuator arm being in the first position and a second state corresponding to the actuator arm being in the second position.

A position sensing device for sensing an upper limit position and a lower limit position of a hoisting line for raising and lowering a door leaf of an animal enclosure, the position sensing device comprising a hoisting line pathway for a hoisting line to raise and lower a door leaf of an animal enclosure, an actuator arm moveable between a first position and a second position, and a proximity switch having a first state corresponding to the actuator arm being in the first position and a second state corresponding to the actuator arm being in the second position.