Abstract: A pneumatically actuated pumping device contains three or more tubular bladders enclosed in rigid jackets and interconnected through openings at both ends forming a common internal pumping channel. Every tubular bladder is enclosed in a separate coaxial jacket, equipped with a special pressure port to assure an access to the internal volume between the jacket and the bladder. Each combination of the bladder and the jacket represents one actuating segment of the pumping device. An independent pneumatic controller distributes a predetermined pattern of a pressure and vacuum pulses through the pressure port and into the enclosed volume between the jacket and the bladder of each individual segment, providing for a selective collapse of the bladders. Every actuating segment, while collapsing, produces either a bidirectional propelling or valving action.

Abstract: An electromagnetic torque sensor arrangement comprising a pair of magnetic circuits differentially responsive to the twist of a rotary shaft under load. Each magnetic circuit comprises a stator assembly, and at least one deflectable element disposed therein on a pair of pins which experience relative rotation in relation to the twist of the shaft. The relative rotation causes deflection of the deflectable elements in relation to the twist, and the resulting variation in the permeability of the magnetic circuits is detected as a measure of the applied torque.

Abstract: Laser therapeutic apparatus irradiates an area of cutaneous and/or subcutaneous physical injury, with a pulsed laser wave, producing healing and pain reduction. A pulsed laser beam of desired frequency is produced by reducing the output of an oscillator via a frequency multiplier which is varied in accordance with the off-nominal frequency deviation desired, if any. The rate multiplier output wave is divided down to a selected frequency and, after amplification, generates pulsed lasing energy.In accordance with varying aspects of the instant invention, a plurality of output lasing units, and optical diffusing lenses, are provided for controlled irradiation of an entire injured area. Circuitry is also provided for detecting pulsed infrared light.

Abstract: Improved circuitry for detecting pulsed infrared light which is particularly suitable for use with laser therapeutic devices. Laser therapeutic devices generally utilize pulsed laser energy of infrared wavelengths. Because such light is invisible the operator of the therapeutic device cannot determine if it is actually working. The invention provides pulsed infrared light detection circuitry which is very compact so that it may be made part of the therapeutic device. The circuitry includes an infrared sensitive transducer coupled to the input of an inverting operational amplifier, a peak detector coupled to the output of the inverting amplifier, and a non-inverting amplifier coupled to the output of the peak detector for driving a display to indicate the detection of pulsed infrared energy.