DUMPING GRATES 



THERE were four sets of Thompson dumping 

 grates in use under the boilers in the old 

 Singer plant for almost five years. 



This fact caused the adoption of the same make 

 of grates for the furnaces of the five large Babcock 

 & Wilcox boilers in the new Singer Building. 



One of these furnaces is 7 feet, 4 inches wide 

 and 9 feet long. The four others are each 9 

 feet square, making a total of 390 square feet 

 of grates. 



The Thompson grate is especially designed and 

 adapted for burning the finer grades of fuel, such as 

 pea coal, Numbers 1, 2 and 3 buckwheat, screenings, 

 etc. It is fitted up on a very substantial frame with 

 adjustable legs, and is independent of all brick 

 work. 



The frames and rockers are not subject to intense 

 heat, and are practically indestructible. The grates 

 are interchangeable. 



The illustration represents a set of Thompson 

 dumping grates as installed in one of the 9x9 foot 

 furnaces, with the two front sections of right side 

 dumped. They are made with ^-inch air space and 

 burn No. 2 buckwheat coal. They are operated in 

 nine sections, three in width and three in length. 

 To clean the fire, the ashpit doors are partly closed. 

 the live coal pushed back from the two front sections, 

 which are connected and dumped together, then tin- 

 coal is drawn forward and the back section dumped, 

 the coal then spread and h'red up; the same operation 

 is performed on each section, and the entire furnace 

 is thoroughly cleaned and fired up in from four to 

 five minutes without waste of coal and but slight drop 

 in steam pressure; the ashes and clinkers are then 

 wetted down and t;iken out at leisure, all dust being 

 avoided. 



These grates were made and installed by Riclninl 

 Tltom/>x<i A- Co., No. 12(5 Liberty Street, New York. 



88 ] 



