The Robinson had a 12hp 4-cylinder engine of Charles Robinson's own design, and was remarkble for its cooling system, which employed exhaust gases. The exhaust entered the 'radiator' at the bottom, and was cooled by a fan as it progressed to the header tank at the the top. Here it was mixed with cool air which was drawn into the tank by a circular orifice, and passed to the finned cylinder heads by a sheet-iron cowl. While it must have reduced the coolings effect of the fresh air, the exhaust accelerated the flow of air to the cylinders. It must have been the only engine in which the radiator also acted as a silencer! Otherwise the Robinson was quite conventional, with shaft drive and a 2-seater body. Only three were made, of which one survives.
Source: Nick Georgano / The Beaulieu Encyclopaedia of the Automobile