Abstract: In a process and a device as well as their use for lubricating and cooling cutting blade edges and/or workpieces in machining operations with chip removal, at least two immiscible fluids are fed to the cutting edges or workpieces. The two fluids include a first fluid for reducing friction between the cutting edge and a workpiece or chip, and a second fluid for cooling the cutting edge, workpiece, cutting edge support and, in case of need, the chips. A surprising increase of the lubricating and cooling effect can be achieved by the fact that the two fluids are stored or processed separately in separate vessels, and each fluid is conveyed from its associated container via a separate feed line to an applicator. Also, each fluid is applied from its associated applicator to the workpiece to be machined or to the cutting edge of the blade.

Abstract: In a tuning circuit for tuning a receiver to a desired broadcast frequency, which tuning circuit includes a source of counting pulses indicating the magnitude of the change in the frequency value to which the circuit is to be tuned, a counter connected to receive the counting pulses and to assume a count state representative of the broadcast frequency to which the circuit is to be tuned, and a timing member for producing a tuning signal having a value determinative of the frequency to which the circuit is tuned during a tuning operation, the timing member is provided with a unit connected to the source of counting pulses for deriving a control signal representative of the frequency of the pulses, and a unit connected for varying the tuning signal in accordance with the control signal in such a manner that as the frequency of the counting pulses increases, the rate of change of the frequency to which the circuit is tuned is increased.