Two New Smith Accessories
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A PRESSURE-OPERATED separatA tor, for extracting foreign matter, abrasive particles, etc., from lubricating oil, and a thermostat of the bellows type which controls the flow of water through the radiator of pump-circulation engine-cooling systems, are two new items of equipment recently introduced by S. Smith and Sons (Motor Accessories), Ltd., Cricklewood, London, N.W.2.
The first, the Smith-Carter oil cleaner, is a pressure-operated centrifugal separator, adapted for insertion in the pipe line. The separation of heavy solid particles from the lubricant takes place within a small rotor which spins at 6,000 r.p.n-t„ this rotation being imparted to it by the passage
of the oil. Pieces of metal, grit and so forth are flung outwards and adhere to the sludge-covered outer walls of the rotor.
The interception of sludge is not a function of the cleaner, but obviously any initial deposit will form on the surface of the metal, further semi-fluid matter being prevented from accumulating by the flow of oil.
The capacity ot the rotor renders cleaning and the extraction of the accumulated particles an infrequent operation. The device has been thoroughly tested and found satisfactory in service.
Described as the Smith BAT. Thermostat, the other accessory incorporates a bellows-operated mushroom valve, set to open at any desired temperature. The by-pass is of large bore and is controlled by a shutter attached to the bellows spindle.
In operation, the by-pass closes as the main valve opens ; this affords a precise and constant temperature control, and the valve will operate against high pressures.