Thermostatic Fan Drive
Page 50
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AUTOMATIC regulation of cooling-water temperature
is aim of a scheme shown in patent No. 876,548. An increase in water temperature increases the fan speed and viee versa. (Suddeutsche Kuhlerfabrik Julius. Fr. Behr, 5 Mauserstrasse, Stuttgart-Feuerbach, Germany.) The drawing shows the fan (1) which is initially driven by the pulleys (2). The same spindle is also used to drive the water pump (3).
The spindle carries the rotor (4) of a vane-type pump and the eccentric ring thereof is fixed to the fan assembly. . If the pump be hydraulically locked, then a straightthrough drive is transmitted from spindle to fan. If the pump output be, by-Passed, then no drive at all is . transmitted.
connected to thermostatic capsule (6) immersed in the cooling water, the ter perature of which opens or closes the valve as required.
Because the oil in the hydraulic unit is heated when slip occurs, it is c around the periphery of the ho on which external fins are prov