CATALOGUE OF THE MECHAaSTICAL ENGINEERING COLLECTION. 59 



bevel gears to a main horizontal shaft, and thence by rawhide gears 

 to a jackshaft paralleling the main shaft, at the extremities of which 

 is secured a sprocket wheel 1^ inches in diameter. Chains connecting 

 these sprockets with sprockets 22 inches in diameter attached to 

 the inner faces of the rear wheel wooden spokes deliver the power 

 to these wheels. 



On the main shaft are two friction clutches, one for forward 

 speed and one for reverse. These clutches are operated through 

 wire-rope connections by an up or down movement of the steering 

 handle, the steering mechanism being of the tiller type. The steer- 

 ing knuckles on the front wheels are the C type, the pivot line of 

 which intercepts the plane of the wheel at the ground. 



The motor-starting crank projects at the rear and turns the crank- 

 shaft by means of a pair of bevel gears. The motor is equipped with 

 a spray type carbureter but without a float, gasoline being fed into 

 the float chamber from a tank situated above the motor at a rate 

 intended to give maximum power at the desired speed. If the 

 motor slows down the accumulation of excess gasoline in the float 

 chamber overflows into a tank beneath the motor, from which it 

 is returned to the main supply tank through the medium of a hand 

 pump. Ignition is obtained by a " make and break " electric spark, 

 the " break " being made by a projection in the piston head. 



Cat. No. 307,199 U.S.N.M. 



Gasoline Automobile, 1893-1894. Gift of Elwood Haynes, 1910. 



This motor car was designed by Elwood Haynes and built in 

 Kokomo, Indiana, during the years 1893-1894. On July 4, 1894, a 

 successful trial trip was made at a speed of six to seven miles an hour. 

 The extreme dimensions of the car are, length, 7 feet 8 inches ; width, 

 6 feet 6 inches ; and height, 5 feet 2 inches. 



As it now stands, the machine is not as it originally appeared, cer- 

 tain changes having been made about two years after the initial trial. 

 These changes were the replacement of the one-horsepower engine by 

 a two horsepower ; the replacement of the 28-inch cushion-tire wheels 

 with 36-inch pneumatic-tire wheels; and the substitution of a tiller 

 type of steering mechanism for the original worm type attached to the 

 center of the axle. To make this change, the axle was made rigid by 

 the braces of a single piece of rectangular steel extending from the 

 ends of the axle through the swiveled head and attached thereto. 

 Bell cranks were then attached to the front wheel spindles and the 

 latter arranged to swivel in forks attached to the ends of the axle. 



The vertical water-cooled motor delivers its power by double chain 

 and sprockets to a jackshaft forward, thence to the rear wheels by a 

 second set of chains and sprockets. Friction clutches on the jackshaft 



