Abstract: The braked linear nipper of the present invention comprises a belt roller, belt, and a belt load for applying a squeeze load along a length of a linear material being pulled along the belt by an object onto which the linear material is being wound. The linear material imparts motion to the belt via friction coupled by the squeeze load. A brake coupled to the belt induces a tension in the linear material.

Abstract: An apparatus is provided for identifying an unknown liquid by determining the speed of sound in the liquid. A pulse generator provides an excitation pulse to a first acoustic transducer which transmits an acoustic pulse in the liquid. The acoustic pulse is received by a second acoustic transducer at a distance from the first transducer measured by a displacement transducer. A gated clock is enabled by the excitation pulse and disabled when the acoustic pulse received by the second acoustic transducer reaches a predetermined threshold. The clock measures the time it takes the acoustic pulse to travel the distance between transducers. The temperature of the liquid is determined by indirect means and is provided as an input to a digital computer which computes the speed of the acoustic pulse by dividing the distance between the transducers, provided by the displacement transducer, by the elapsed time measured by the clock.

Abstract: A wheelchair is designed to enable an invalid to stand, sit or choose at l any intermediate position to perform useful work, and to move about in any of said positions. The wheelchair helps to fulfill the psychological and physiological needs of handicapped persons. The lifting and lowering operations are so arranged that practically no dislocation of the invalid's clothes occurs during the operations. The wheelchair has a minimum of physical encumbrances permitting the invalid to function near normally in the average living or working spaces.

Abstract: A wheelchair is designed to enable an invalid to stand, sit or choose at l any intermediate position to perform useful work, and to move about in any of said positions. The wheelchair helps to fulfill the psychological and physiological needs of handicapped persons. The lifting and lowering operations are so arranged that practically no dislocation of the invalid's clothes occurs during the operations. The wheelchair has a minimum of physical encumbrances permitting the invalid to function near normally in the average living or working spaces.