24 AIR COMPRESSORS 



the air above is compressed. Air then flows in through the 

 screened air inlet and passes downwards through the receiving 

 valve into the lower end of the air cylinder, filling it with air at 

 atmospheric pressure. The air that is compressed above the 

 piston holds the receiving valve on its seat, and passes out 

 through the discharge valve to the main reservoir. On the 

 downward stroke of the air piston, a partial vacuum is formed 

 above, and the air is compressed below it. Air then flows in 

 through the air inlet, passes through the receiving valve, and 

 fills the upper part of the cylinder with air at atmospheric 

 pressure. As the air is compressed below the piston, it holds 

 the receiving valve on its seat and passes out through the 

 discharge valve to the main reservoir. 



9J-IN. AIR COMPRESSOR 



The pump shown in Fig. 2, is a 9f"X93"X10" compressor 

 and is made in two styles, right-handed, and right-and-left- 

 handed. The left-handed pump is furnished only when specially 

 ordered. The compressor weighs 525 Ib. and the lift of all 

 air valves is &-in. The operation of this compressor is exactly 

 the same as the operation of the 8-in. compressor. 



When ordering this compressor or ordinary parts of one, the 

 piece number, reference number, and name of the part wanted 

 should always be given. The piece number of a right-hand 

 9J-in. air compressor complete is 1,957; of a right-and-left- 

 hand 9$-in. air compressor complete, it is 1,852. The numbers 

 of the various parts are given in the accompanying list. 



PC. No. Ref. No. Name of Part 



1,853 2 Top head, complete, includes one each 

 14, 15, 16, 17, 18, 25, 26, 27, 28, 29, 46, 

 eight of 48. 



*1,880 3 Steam cylinder, complete, includes one 

 each 34, 35/36, 37, 38, 58, 59, 104, three 

 of 57, four of 61, i-in. pipe plug and 

 | -in. pipe plug. 



tl,958 3 Steam cylinder, complete, includes one 

 each 34. 35, 36, 37, 38, 58, 59, 60, 104, 

 two of 57, four of 61. 



1,910 4 Center piece, complete, includes one of 55, 

 two each 40, 41, 42. 



* For right-and-left-hand compressor, 

 t For right-hand compressor. 



