drive are on the jackshafts, or output shafts, of the differ- 

 ential. These also carry brake drums, with external con- 

 tracting bands controlled by the brake pedal. A multiple 

 disk clutch is incorporated in the flywheel and is controlled 

 by a pedal to the left of the brake pedal. 



Final drive is by double chain, one to each rear wheel. 

 The front sprockets have 25 and the rear sprockets 40 

 teeth. The Simplex was one of the last American makes 

 to use chain drive. 



The body, made by Holbrook of New York, is of the 

 bucket-seat speedster type and is painted red with black 

 striping. It was one of the few American cars of its date 

 still using right-hand drive. 



Behind the two individual bucket seats (fig. 91) is a 13- 

 gallon, cylindrical oil tank 12 inches in diameter and 27 

 inches wide, equipped with a quick-opening, racing-type 

 filler cap. Behind the oil tank is a 40-gallon, cylindrical 

 gasoline tank 21 inches in diameter. It is also 27 inches 

 wide and is equipped with a similar filler cap. Pressure 

 in the two tanks forced gasoline to the carburetor, and oil 

 to the oil tank under the hood. Pressure of about 2 

 pounds per square inch was maintained in the two tanks 

 by the exhaust pressure of the engine passed to the tanks 

 through a Lunkenheimer filter and pressure regulator. 

 When the engine was at rest, pressure could be raised in 

 the tanks by a hand pump. A gauge at the hand pump 

 indicated the pressure at all times. Valves on the tanks 

 allowed the driver to shut off the pressure if desired. 



The original wooden-spoked artillery wheels have been 

 cut down to accommodate 23-inch demountable rims 

 equipped with 33-by-5-inch straight side tires. Mounted 

 upright behind the gasoline tank are three spare rims 

 equipped with tires. 



The car is equipped with a Mayo honeycomb radiator, 

 protected by a stone-guard on the front. The spokes of 

 the flywheel are shaped to act as a fan behind the engine. 

 A Juhasz carburetor (bearing the patent date of June 22, 

 1915), with a barrel-valve throttle, has replaced the orig- 

 inal carburetor. Either a foot accelerator or a lever on the 

 quadrant on the steering wheel can be used to control the 



127 



