Driving Your Car Through a Stream of Oil 



This new transmitter solves the dual prob- 

 lem of power-waste and leakage of oil 



FLEXIBILITY of operation is the 

 great outstanding factor of power 

 transmission by means of fluids, so 

 far as the automo- 

 bile is concerned. 

 Fluids transmit 

 power through the 

 pressure exerted 

 by the fluid on the 

 part to be moved. 

 The fluid is 

 pumped by some 

 means into cham- 

 bers containing the 

 parts to be moved, 

 and since the 

 fluids used are 

 practically in- 

 compressible, the 

 degree of pres- 

 sure exerted is al- 

 most proportional 

 to rate of flow or 

 the pressure rep- 

 resented by that 

 flow. It is a simple 

 matter to change 

 the pressure by 

 merely changing 

 the rate of flow. 

 • This may be 

 done by ordinary 



control means and gives such a wide range 

 of different speeds that when a hydraulic 

 transmission is applied to an automobile, 

 the latter can be run 

 at the speed best 

 suited to the condi- 

 tions of load and 

 road instead of the 

 three or four speeds 

 provided in the or- 

 dinary sliding-gear 

 transmission. 



The hydraulic 

 transmission sup- 

 plies those speeds 

 which the gear re- 

 duction cannot be- 

 cause the number of 

 teeth in the meshing 



Parts of Power Transmitter 



When engine is started, the blades of member at- 

 taclied to engine force oil against blades of housing 

 mounted on propeller shaft, turning this and finally 

 rear wheels. The oil flows back into a chamber at 

 inner circumference of two housings, whence it again 

 reaches blades of engine member, thus continually 

 circulating within housings. Gentle flow eliminates 

 the jerks caused by the clutch in ordinary cars 



of the oil. 

 factors are 

 Both of 



Showing the installation of a tur- 

 bine as a substitute for the clutch 



878 



gears necessarily always remains the 

 same. Again, the hydraulic transmission 

 enables the pressure to be increased gradu- 

 ally from low to 

 high speed. It 

 also eliminates the 

 clutch and does 

 away with the at- 

 tendant manual 

 effort when chang- 

 ing speeds. 



The hydraulic 

 transmission of 

 power in motor 

 vehicles is not new. 

 In some of the sys- 

 tems used a mas- 

 ter pump is driven 

 by the engine, and 

 other smaller 

 pumps drive the 

 wheels, the oil 

 reaching and leav- 

 ing the smaller 

 pumps through 

 a series of pipes. 

 Most of the pumps 

 consume an ex- 

 cessive amount 

 of power because 

 of skin friction in 

 the pipes or leakage 

 Sometimes both of these 

 combined. 



these difficulties seem to be 

 solved in the power 

 transmitter, which 

 consists of a com- 

 bination of a cen- 

 trifugal pump and a 

 turbine that can be 

 inserted in place of 

 the clutch in any car 

 equipped with the 

 ordinary gasoline- 

 engine of the pres- 

 ent day. There are 

 no pipes. No changes 

 need be made in 

 the other power 

 transmitting parts. 



