No. 52466. 



Propagation of Pressure. Hydraulic Presses. 



337 



52 461. 1 : 6. 



52465. 1:4. 



52 463. 1 : 7. 



52466. 1:8. 



52.460. Flat Sheet Iron Box, for storing the rubber cushion (W. D., p. 148) 



52.461. Hydraulic Press, Figure (W. D., Fig. 107 [96]), massively constructed of iron 

 and steel; valves fitted, so as to be detachable, in special valve chambers, giving 3000 kg 

 pressure, with safety valve for 60 atmospheres 



The ram has a cross-section of 50 sq. cm; each atmosphere of pressure thus corresponds to a 

 50 kg pressure. The press has an efficiency of 60 ats., which is equivalent to 3000 kg pressure. 



52,462. - - idem, with Pressure Gauge 



52.463. Hydraulic Press, of metal, for a pressure of 1500 kg, Figure 



52.464. - - idem, with Pressure Gauge 



52,465. Hydraulic Press with Glass Cylinder and visible valves, Figure, with safety valve 

 for 25 Atm., for preventing bursting of the cylinder, for 500 kg pressure 



52.466. - - idem, with Pressure Gauge, Figure 





Cl. 707, 709, 

 708, 5119. 



s. d. 

 0. 8.0 



12. 0.0 



14. 10. 



8.10.0 



11. 0.0 



8. 0.0 

 10.10.0 



22 



