CONSTANT TEMPERATURE OF THE JACKET WATER.
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An Automatic Device for Maintaining the Water at the Temperatme Giving the Greatest Efficiency.
THANKS to a beneficent Gulf Stream, we have not been compelled, despite the distance at which these islands have been placed north of the Equator, to suffer from a sufficiently wide range of temperatures for means of regulating the heat of the jacket water of our motor engines to have been urgent in the past, but it is safe to assume that the gradual increase in the density, of our fuel brought aWont by the machination and :Operations of the Oil producers of the world is causing us to give considera
tion to the subject. . . Rough and ready means of regulating by hand are
the partial_ Opening and closing.-of-a cock introduced
,
into the feed pipe from radiator_ to jacket, or_ by the use of radiator screens, but what is really required-is all automatic method which shall` deal with all--the factors of Cooling—the water circulation-and the air circulation. Such a device has been introduced in the States and is known as the Wititerfront, being made by the Fines Manufacturing Co. of ,Chicago. The device consists of a drawn steel shell fitting to go over the core of the radiator, being attached by tour bolts which pass throughit. • A braided cord edging forms a protecting cushion between the shell and the core of the radiator._ It is -equipped with shutters made of smooth Steel and ribbed for strength. The shutter trunnions are turned brass and work in composition bearings. They are arranged to operate in unison and are connected with the, thermostat in the upper portion_ of the drawn shell by a linkage._ The therinostat -consists of a pair of thernio-water' cells, a spacer and,, an aluminium heat-Conducting plate. The thernuo7wafer cells are spring brorie. are filled with a liquid which expands and contracts Nvich the teniperature. The aluminium heat-conducting plate is held flat against the radiator. On a cold (lity; the thermo-wafer cells are concave, the sides of the cells almost touching at their centre. When the cells are cold, the shutters are closed, and they are accordingly entirely closed on starting the engine. They remain so until the radiator has warmed up to 130 degrees Fahr., when the heat is conducted by the aluminium flange to the thermo-wafer cells, causing them . to expand. As the cells expand the shutters open gradually to Correspond_ with the requirements of the engine. •
This naturally has the effect of increasing the volume of air •passing over the cooling surfaCes and'a balance is then maintained, serving to keep the -water in the radiator and, therefore, throughout tint cooling system at a constant temperature. •
The -Winterfront can be removed in the summer.