Pumping Gasoline to the Motor 



A WESTERN manufacturer is mar- 

 keting a device designed to elim- 

 inate the troubles encountered in 

 the feeding of gasoline to the motor 

 of an automobile from a tank by grav- 

 ity during hill-climbing, when the car- 

 buretor is higher than the tank, or 

 for keeping the feed-lines from leaking 

 when the pressure system is used. It 

 feeds the gasoline automatically and 

 positively by utilizing the vacuum of 

 the motor on its intake-strokes. The 

 vacuum system feeds the gasoline on 

 the steepest grades. It is not dependent 

 upon the tightness of 

 the feed lines for its 

 operation, as in the 

 pressure system. 



The device consists 

 of two small tanks, one 

 within the other, usual- 

 ly mounted on the 

 dash under the hood. 

 The upper inner tank 

 is connected with the 

 intake manifold, while 

 another pipe connects 

 it with the main gas- 

 oline-supply tank. The 

 lower tank is connected 

 with the carburetor. 



The in take -strokes 

 of the motor create a 

 vacuum in the upper 

 tank. Gasoline rushes 

 from the supply tank 

 to fill the vacuum. As 



VACUUM 



TANK \ V/FWT 

 INTAKE \ ^'■"' 



nANIFOLD \ P'PE 



SUCTION 



the gasoline thus flows into the upper 

 tank, it raises a float to a certain height, 

 thus shutting off the vacuum-valve, at 

 the saine time opening an atmospheric- 

 valve at the bottom of an air-vent 

 pipe as shown in the accompanying 

 illustrations. 



By this arrangement the gasoline can 

 now flow down into the lower tank, 

 which is always open to the atmos- 

 phere by means of an air-vent at the 

 top. When the float in the upper tank 

 drops, as the gasoline flows down, it 

 automatically re-opens the vacuum- 

 valve. More gasoline is 

 sucked in, and simultane- 

 ously the atmospheric 

 valve is shut off. A study 

 of the illustration in the 

 oval will make this clear. 

 The process is repeated 

 continuously while the 

 motor is running, and 

 however steep the grade 

 there should be no trouble 

 encountered in the feed- 

 ing of gasoline to the 

 motor. 



Detail of the vacuum 

 gasoline feed. When a 

 vacuum is created by the 

 motor on each intake- 

 stroke gasoUne rushes into 

 the upper chamber. The 

 float-valve rises with the 

 gasoline, cuts off the 

 vacuum-valve, and opens 

 the valve leading to the 

 lower chamber, so that 

 the gasoline may pass 

 down into the lower tank 



CARBURETOR 



CARBURUOR I 



PlPL 5UPPLY PIPt 



Sectional view of automobile. An arrangement whereby the vacuum created by the motor 

 on its intake strokes causes a flow of gasoline to the motor, thus eliminating the feeding 

 trouble usually encountered on steep up-grades with the gravity or prcwure systems 



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