Improvements in heating attachments for liquid circulating systems

266,137. Johnstone, E. C. March 1, 1926. Heating by electricity.-A heating attachment for preventing freezing is permanently combined with the circulating water system of a motor car and consists of a casing 10 threaded to receive a heater 25 occupying the major part of the casing so as to leave a narrow water-space 30, 31 communicating with a circulation pipe 4 by the tubes 7, 8 or by a single connection.