[MCLENNAN & shrum] LIQUEFACTION OF HYDROGEN 



183 



CPOSS SECTfO/V SHOW/fiG ADDITIONS 

 TO WHITEHEAD COMPRESSOR 



Fig. 2 



pump is in operation the crank case A is kept partially filled with oil 

 so that as the crank revolves the bearings B^ and Bi, together with the 

 stuffing box P, are well lubricated. The gas that leaks past the 

 pistons of either the first or second stage is collected in this chamber, 

 from which it is conducted through an oil-trap attached at £, to the 

 low pressure intake. 



The maximum capacity of this compressor is 600 cu. ft. of free 

 gas per hour, but a simple and ready means of reducing this by any 

 desired amount has been devised. 



For the hydrogen cycle one gasometer of 60 cu. ft. capacity is 

 installed, while for the helium cycle there are two with a capacity of 

 25 cu. ft. each. These gasometers are made from gauge No. 10 

 black iron, with welded seams, and an upper frame-work of channel 

 iron. The gas-holders float on oil and are suspended by means of 

 counter weights with roller-bearing pulleys. Since it is inadvisable 

 to use any but a high grade oil the gasometers are arranged with an 

 inner or third cylinder to reduce the amount of oil required. Glass 

 check valves are arranged through which the oil of the gas-holder can 

 be visibly drawn up and automatically checked. This latter arrange- 

 ment eliminates the danger of crushing in the gas-holder or of pumping 

 oil over into the piping system, should the pressure in the latter 



