i STEAM COAL - Clpdigital.org
i STEAM COAL - Clpdigital.org
i STEAM COAL - Clpdigital.org
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
THE <strong>COAL</strong> TRADE BULLETIN. 35<br />
A PORTABLE BOILER AND AIR COMPRESSOR.<br />
There is a demand in many industries for a<br />
portable air compressing outfit which can easily<br />
be carried from one location to another and used<br />
for the operation of drills, chipping and riveting<br />
tools, sand blasting and similar purposes. The<br />
outfit illustrated herewith has been designed at<br />
the Clayton air compressor works, 114 Liberty<br />
street, New York City. It is entirely self-contained,<br />
as the boiler, compressed air receiver, air<br />
compressor and circulating pump for cooling the<br />
air cylinder jackets are all mounted on one truck.<br />
For riveting hammers the compressor is proportioned<br />
to deliver air at about 100 pounds<br />
pressure per square inch, while for sand blasting<br />
and stone tools, air is supplied at 70 pounds pressure.<br />
The receiver permits the storing of air<br />
so that a much larger number of tools<br />
may be operated than otherwise, since<br />
it is only occasionally that all<br />
tools are in operation at the<br />
same time. The pressure of<br />
the air is maintained by a pressure<br />
governor, while the compressor<br />
is prohibited from<br />
running away, in case of a<br />
break on the air line, by a flyball<br />
speed governor, the two<br />
governors being so combined<br />
that they operate upon a common<br />
throttle valve. The com<br />
COASTWISE <strong>COAL</strong> SHIPMENTS.<br />
Coastwise coal shipments for 1903 and 1904 compare<br />
as follows:<br />
1904. 1903.<br />
Tons. Tons.<br />
From New York 21,296,400 18,040,094<br />
From Philadelphia 5,542,264 6,215,321<br />
From Baltimore 2,302,788 1,731,896<br />
From Newport News 2,655,697 1,790,479<br />
From Norfolk 2,119,513 1,673,940<br />
Total 33,916,662 29,451,730<br />
Of the amount for 1904, 18,925,549 tons was soft<br />
coal and 14,991,H3 tons anthracite. The figures<br />
include the coal supplied to the coastwise vessels<br />
for their own use as fuel. In 1904 such coal<br />
amounted to 3,436,084 tons. Of the New York<br />
shipments, the largest single item—nearly half of<br />
the total—covers the tonnage ferried from the<br />
several New Jersey termini to Manhattan. Boston<br />
receives the heaviest shipments from all the above<br />
ports, but New York City receives almost no coal<br />
pressor engine exhausts into the stack, thus increasing<br />
the draught. The air compressor cylinder<br />
walls are jacketed and are supplied with<br />
cooling water by a small duplex pump.<br />
by water from other than the immediate harbor<br />
points, as above mentioned.<br />
Trade on the great lakes during the two years,<br />
among all domestic shipping and receiving ports,<br />
may be stated thus: 1903. 1904.<br />
Shipments: Tons. Tons.<br />
Anthracite 3,931,693 3,459,212<br />
Bituminous 10,876,111 10,666,012<br />
Total shipments.. 14,807,804 14,125,224<br />
Receipts:<br />
Anthracite 3,829,389 3.463,102<br />
Bituminous 9,516,954 9,568,941<br />
Total receipts 13,346,343 13,032,043<br />
Shipments, as in the Atlantic coastwise trade,<br />
include coal supplied for vessel fuel. Shipments<br />
to Canadian lake ports, not included in the above<br />
totals, were, in 1904: Anthracite. 1,660,453 tons;<br />
bituminous, 4,656,900 tons, showing, as compared<br />
with 1903, an increase of 25,649 tons of anthracite<br />
and a decrease of 362,514 tons of soft coal.