352 AMERICAN “HOMES AND) GARDE Ns May, 1906 
outlet at the bottom of the radiator. No air 
valves are used on the radiators, thus doing 
away with the most annoying and irritating 
of all contrivances. ‘The system of piping is 
the ordinary two pipe, dry return system, with 
a loop seat at the end of each steam main. 
When the system is installed in large build- 
oe ; ings the only change necessary is to use two 
of how Terne Plates are made, has saved many a man many a Bere. ae ee lice Paves Bre bere 
dollar when specifying and laying a tin roof. That you may return mains, if desired. The Automatic 
kenowsexactlhor, : Drainage Valve, the first of the accompanying 
/ engravings, is specially constructed with a 
brass cylinder in the body of the valve, with 
a small opening in the side of the cylinder, 
which forms the valve seat. A cone-shaped 
piece of metal projects from the disc of the 
valve into the opening of the seat, which is 
made at such an angle as to prevent wedging 
or sticking. The disc of the valve is sus- 
pended from the top of the cylinder, so that 
it can swing freely backward and forward, 
thus opening and closing the valve. Normally 
the valve is closed, but a counterweight is ap- 
plied in such a manner as to render the open- 
A Thorough Understanding 
ROOFING TIN 
is made, and how carefully each branch of the Old Style process 
is adhered to, we want to send you our valuable booklet ‘“‘“From 
Underfoot to Overhead”’ free of charge. 
‘This follows the ore from the time it leaves the mine until it becomes a 
sheet of MF Tin; it also shows illustrations of the many processes through which 
the ore must pass before it is ready for the roofer’s hands, and taken all in all is 
a book which every Architect, Roofer and Property owner should read and keep 
for reference. 
Write to our Advertising Department to-day —and learn how ‘‘ The 
Terne which turns the elements’’ is made. 
AMERICAN 
SHEET ©& TIN PLATE AUTOMATIC RELIEF VALVE. 
COMPANY ing of the valve very gradual, according to 
the difference in pressure. ‘Therefore, when 
a radiator valve is opened the pressure of the 
FRICK BUILDING PITTSBURGH, PA. steam going into the radiator will force the 
cone backward, thus opening the valve, and 
allowing the air in the radiator and the water 
of condensation to pass through and down into 
the return main, where the air is removed 
through the Automatic Relief Valve, shown 
CaS A fe 2.6 e Ace INE Gee in the second illustration, and the water flows 
é ph ee ‘0 the Lak venet it 6 ee ie par- 
tially heat a radiator the radiator valve is 
Grand Rapids STEEL Sash Pulleys opened just a little. ‘The steam will pass in 
across the top of the radiator, producing a 
ap eat are sold direct to Builders, slight pressure on the Automatic Drainage 
‘ Contractors and Mills at prices Valve, which will be opened sufficiently to 
allow the air, displaced by the steam, and the 
water of condensation to pass out into the re- 
under the common, ordinary 
goods. turn main. ‘The radiator will only be heated 
q If you make ten or ten thou- in proportion to the amount of steam ad- 
sand window frames, we can mitted, for it will fill only the portion of the 
radiator that has surface to condense it; there- 
fore the radiator will not be fully heated until 
the radiator valve is wide open. “The Auto- 
save you money and give you a 
superior sash pulley. We are 
the largest sash pulley makers in matic Relief Valve is made in two parts. The 
the world. We ship direct, or upper part or air valve is connected to the 
through dealers and jobbers return main, and the lower part or bowl is 
connected to the steam main. In the bowl is 
a very sensitive flexible diaphragm, which is 
@ Write for catalogue and free samples and prices on half-gross, gross, barrel or any connected to the valve rod. The lower end 
quantity. Direct from the makers to you. Inquiries welcome. of the rod is connected with a balance lever 
and weight, and the upper end of the rod ter- 
GRAND RAPIDS HARDWARE CO minates in the Jenkins disc valve seat of the 
- air valve. ‘The weight of the balance lever 
17 Pearl Street, Grand Rapids, Michigan is so adjusted that the air valve will open when 
the pressure in the return main equals that in 
everywhere. 
