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.

The information display apparatus includes a sheet display section; a mechanical mechanism that moves the display section, and switches a state of the display section between a deployment state in which a display space is formed and a non-deployment state in which the display space is not formed; a motion sensor that detects a motion of the display section; and a controller that calculates, from data of the detection performed by the motion sensor, at least motion information other than a component related to the movement of the display section that is performed by the mechanical mechanism, and determines an anomaly.

The information display apparatus includes a sheet display section; a mechanical mechanism that moves the display section, and switches a state of the display section between a deployment state in which a display space is formed and a non-deployment state in which the display space is not formed; a motion sensor that detects a motion of the display section; and a controller that calculates, from data of the detection performed by the motion sensor, at least motion information other than a component related to the movement of the display section that is performed by the mechanical mechanism, and determines an anomaly.

Disclosed is a sheave for use in a tension measurement system to measure a tension force in a cable. The sheave includes a first diameter and a second diameter. The sheave is configured to rotate about an axis to orient the first diameter or the second diameter toward the cable, such that a contact force between the sheave and the cable is measured by a tension sensor to determine the tension force in the cable.

An information related to the position of an actuator coupled to a cable which is coupled to a motor is received. A filter is used to provide an input to a motor controller coupled to the motor, to adjust torque on the motor such that a strength curve is implemented relative to the position of the actuator.

Assisted racking of digital resistance includes detecting a state of a cable. A motor is mechanically coupled to the cable to provide resistance during an exercise by tensioning the cable. It further includes determining completion of the exercise based at least in part on the detected state of the cable. It further includes selectively removing resistance from the cable based at least in part on the determination that the user has completed the exercise.

A device for measuring stiffness of the string bed of a racket, includes a main body adapted to sit on the string bed; a force measuring device mounted to the main body; a biasing arrangement connected to the force measuring device and adapted to be connected to the string bed for deflecting the string bed in relation to the force measuring device, and causing the force measuring device to output a signal corresponding to the deflection of the string bed; a stop connected to the main body in a manner such that the stop is not acted upon by the deflection of the string bed when deflected by the biasing arrangement and which limits the string bed to a predetermined amount of deflection by the biasing arrangement; a switch to provide an output when the string bed is deflected to at least a predetermined position; a display for displaying the stiffness of the string bed in accordance with the signal output from the force measuring device in response to a change in the output from the switch as the string bed moves from the deflected position to an undeflected position; and a positioning device to repeatably position the string bed stiffness measuring device on the string bed.

A device for measuring stiffness of the string bed of a racket, includes a main body adapted to sit on the string bed; a force measuring device mounted to the main body; a biasing arrangement connected to the force measuring device and adapted to be connected to the string bed for deflecting the string bed in relation to the force measuring device, and causing the force measuring device to output a signal corresponding to the deflection of the string bed; a stop connected to the main body in a manner such that the stop is not acted upon by the deflection of the string bed when deflected by the biasing arrangement and which limits the string bed to a predetermined amount of deflection by the biasing arrangement; a switch to provide an output when the string bed is deflected to at least a predetermined position; a display for displaying the stiffness of the string bed in accordance with the signal output from the force measuring device in response to a change in the output from the switch as the string bed moves from the deflected position to an undeflected position; and a positioning device to repeatably position the string bed stiffness measuring device on the string bed.

Disclosed is a sheave for use in a tension measurement system to measure a tension force in a cable. The sheave includes a first diameter and a second diameter. The sheave is configured to rotate about an axis to orient the first diameter or the second diameter toward the cable, such that a contact force between the sheave and the cable is measured by a tension sensor to determine the tension force in the cable.