Abstract: A peristaltic pump comprising a rotor and a plurality of removable cartridges associated with the rotor, wherein the occlusion beds of the cartridges are configured to enable the outflow characteristics of the pump to be varied by manipulation or interchanging of the cartridges, such that the pump may, in one mode of operation, have synchronous flow to all of its parallel flow channels, or may in a second mode of operation, have non-synchronous phase-offset flow to respective ones of the parallel flow channels. In the second mode of operation, manifolding of the output flow from respective ones of the parallel flow channels can be employed to provide flow of substantially reduced pulsation. Each of the cartridges preferably comprises a cartridge frame and a separate occlusion bed supported on the cartridge frame. In the second mode of operation, the occlusion beds of the cartridges preferably have regions of maximum occlusion offset relative to one another.

Abstract: A machine and method for the fully automated manufacture, assembly, and packaged delivery of protective spectacles of that type typically provided by an optometrist to a patient for temporary protective eyewear use following mydriatic eye examination procedures.

Abstract: Gas analyzing techniques for monitoring the amount of oxygen in the exhaust of motor vehicles. An oxygen sensor produces a sensor signal having a sensor value proportional to the partial pressure of the oxygen produced by the motor vehicle. Processing circuitry generates a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value. The resulting signal can be used to predict the final sensor value at a point in time earlier than would be otherwise possible.

Abstract: The disclosure relates to a system for providing a substantially noise free audio intelligence signal for a sound-movie camera. The system comprises first and second microphones mounted on the camera, the first microphone being arranged for detecting camera noise and audio intelligence for providing a first electrical signal having camera noise and audio intelligence components and the second microphone being arranged for detecting substantially only camera noise for providing a second electrical signal having substantially only a noise component. The second microphone is mounted nearer to the camera noise source than the first microphone so that the second signal is in advanced phase relation relative to the first signal. The system also includes a delay means and inverting means for delaying and inverting the second signal to provide a delayed inverted second signal which is in phase with the first signal.