A Typical American Touring Car

1905 Scientific American  
The annexed sectional cut shows in considerable de tail the mechanism of a gasoline touring car of dis tinctive1y American type. From the manufacture of a single-cylinder runabout and light tonneau, the mak ers of the Cadillac machines have risen to the con struction of the hU!;8 car seen below. In doing this, however, they have wisely retained features which contributed largely to the success of the smaller mod els, and at the same time added several novel improve ments. Thus we see on the
more » ... s we see on the touring car engine copper water jackets, variable-lift mechanically-operated inlet valves, and the same floatless atomizer or mixer that have been used heretofore; while a distinct novelty for a car of this kllld is the Employment of a planetary transmission gear which, in connection with a clutch in the flywheel, gives three speeds forward with a di rect through drive on the third, or high speed. The special form of three-speed planetary gear for the large touring car was devel,oped from the two-speed gear of the smaller machines by the addition of only one moving part. As is well known, this transmission is well adapted for continuous heavy pulling, because it has no high-speed parts and its gears are subjected to lower tooth strains, size for size, than those of any other common type of transmission. With this type of transmission it is possible to pass instantly from one speed to another by simply pushing a lever. The, Scientific American telescopic universal joint, 59, is to be noted. The car has a spur-gear differential and bevel driving pinion, 61, which can be readily adjusted from the outside. The main rear axle is a solid tube having ball bearings on each end for the wheels. The live axle extends through these, and drives them by means of jaw clutches that lock it to the outside face of the hubs. The car has long, heavy springs, besides a transverse spring at the back. Its wheels are shod with 34 x 4Y2. inch tires, and it has a wheel base of 100 inches, while the length of the frame itself is over 12 feet. The weight complete is in the neighborhood of 2,600 pounds. The 4% x 5-inch engine is rated at 30 horse-power, and it is capable of driving the machine at a rate of speed of 50 miles an hour. Altogether this car is a good example of that sim plicity of construction that is aimed at by almost all American builders.
doi:10.1038/scientificamerican12161905-480 fatcat:qzquiim32nfl3muvnmp7ufyree