Abstract: An improved device is described for measuring and registering lumbar spinal movement. The device, which is portable, is attached at an upper and lower portion of the lumbar region and measures multiple axis of motion by means of independent electric sensors. The device of the invention is an improvement over prior art devices because it provides appropriate compensation for errors induced through interaction of three axis only of rotational movement.

Abstract: A device is provided for registering and recording induced imbalance in a human subject. A horizontal platform is adapted for controlled, linear displacement in a horizontal plane to induce imbalance. Imbalance and response can be detected and recorded by means of electric contact shoes or other means.

Abstract: An isoinertial lift machine is described which can be used to evaluate and train patients in the static and dynamic lift modes. The machine consists of an arm which can be positioned on a vertical column. At the end of the arm, various size attachments and handles can be attached. The arm also carries a force sensor that measures the forces applied to the handles. In the static mode, the arm is positioned at a desired height and locked in place. The patient lifts on the handle, and the force sensor registers the lifting force. Since the handle does not move during the lift, the mode is called static. In the dynamic mode, the arm/handle moves in the vertical direction during the lift. A resistance mechanism is used to resist the lifting force applied by the user at the handle. The resisting force is always pulling the arm down, both in the lifting and the lowering motion. The resisting force remains constant throughout the range of motion during lifting.

Abstract: Back exercise apparatus has a seat and a footrest, with a first backrest pivotable about a horizontal first axis for biasing the upper portion of a person on the seat about the first axis, and a second backrest pivotable about a vertical second axis for biasing the upper portion of the person about the second axis. A gearbox selectively connects a drive to either backrest and has an input shaft connected to the drive, a pair of output shafts parallel to the input shaft and a selector for connecting the input shaft to a selected one of the output shafts for rotating the selected output shaft in either direction of rotation.

Abstract: Back exercise apparatus has a seat and a footrest, with a first backrest pivotable about a horizontal first axis for biasing the upper portion of a person on the seat about the first axis, and a second backrest pivotable about a vertical second axis for biasing the upper portion of the person about the second axis. A gearbox selectively connects a drive to either backrest and has an input shaft connected to the drive, a pair of output shafts parallel to the input shaft and a selector for connecting the input shaft to a selected one of the output shafts for rotating the selected output shaft in either direction of rotation.

Abstract: A device for measuring linear force which is converted to rotational force or torque. Initially, force is applied in a linear direction to a means for transmitting that force to a rotatable shaft where it is converted to rotational force which can be measured by a strain gauge. The device is mounted on a vertically adjustable column attached to a moveable base.

Abstract: A device is provided for rehabilitation, exercise and therapy which consists of an upright standard to which are attached in predetermined order and position, arrays of modules made up of interchangeable units attached together in varying configurations. Assembly and disassembly of the modules from the standard in the proper sequence and position accurately simulates various stretching, bending, lifting and stooping operations encountered in occupational and other efforts.

Abstract: A method and device for rehabilitation and evaluation are described in which the individual is required to perform manual operations within a visually obscured enclosure. Partitions are provided within the enclosure to simulate the performance of mechanical operations within a confined space. The operations themselves may typically be the placing and tightening of nuts on bolts which project into the enclosure.

Abstract: Apparatus for simulating the operational characteristics of different tools in the rehabilitation therapy of damaged limbs by simultaneously carrying out, in coordinated fashion, several muscle and joint movements, which comprises:(a) an angularly adjustable shaft mounted for full rotation in either direction about a fixed axis;(b) a rotation register for measuring the degree of rotation of said shaft;(c) a brake responsive to an applied voltage for applying a constant pre-determined torque resistance to said shaft corresponding to the amount of applied voltage;(d) a device for selectively varying the amount of said voltage at a constant value such that said corresponding torque resistance is maintained at a constant value within a range useful for rehabilitation therapy; and(e) an accessory coupler on one end of said shaft for detachably receiving and supporting corresponding coupler elements of a plurality of tool simulator accessories of different frame and handle sizes and/or configurations.