188 TRANSACTIONS OF THE 



BalPs Safety Pump for supplying Steam Boilers with water. 

 Ames' Manufacturing Co., Chicopee, Mass. Steam is taken 

 through the pipes a a to the separator P; thence through the pipes 

 b c c d d to the oscillating steam cylinders q q. The water car- 

 ried along with the steam to the separator is carried through the 

 pipes f g g to the pumps r r, and from these is forced through the 

 pipes h h i i k k back into the boilers, in addition to that taken 

 from the supply tank, or well, through the pipe o. 



An inspection of the engraving, with a reference to its descrip- 

 tion, will show its construction and mode of operation, being at 

 once self-acting, or rather acting as required by the condition and 

 exigencies of the steam boiler, and not requiring the sui3ervision 

 of an attendant. 



The s'eam pipes a a start from the bailers at the usual water 

 line, and consequently when the water is at this height they are 

 filled with surcharged steam, which is carried along to the sepa- 

 rator p, in which the steam is separated from the water. The 

 steam is then conveyed through the pipes b c c d d, and intro- 

 duced through the journals of the oscillating cylinders q q into 

 the same, giving motion to their pistons and working the cranks 

 on which the small pinion is fixed, which gives motion to the 

 shaft carrying the cranks to the rods of the pump r r, the water 

 in the separator hi the meantime having been carried down to the 

 pumps through its appropriate pipes, b c c d d. 



It will be seen that, in the above operation, when the water in 

 the boilers stands at the proper height, giving the requisite sup- 

 ply, the amount of steam carried through the pipes a a to the 

 separator P, and thence to the cylinders q q, is comparatively 

 small after its separation, as it must in this case be largely sur- 

 charged with water, and consequently the steain cylinders and 

 pumps are worked slowly and in proportion to tlie supply of 

 water already in the boilers; if, however, the water in the boil- 

 ers be lowered below the proper water line, the amount of un- 

 mixed steam is increased, and a greater volume is forced through 

 the pipes, &c., to the cylinders, giving them more rapid motion, 

 as well as the feed pumps, r r, and speedily restores the proper 

 condition of the boilers; thus in all cases regulating its own speed 

 to meet the exact supply of water required; and a mere glance 

 is sufficient to assure the engineer that the water in tlie boilers is 

 at its proper height. Its connection wiili the supply tank, or 

 well, by means of the pipe o, requires no further description. 



[ji gold medal awarded. 



