New-York daily tribune., 1858-07-21
A NEW STEAM ENGINE.

Nss we'll established fact ths. inventor, as Class
Gre bosstrg set and .nst any business man in deal
ing with them goes mentally though the process of sub
tracing seventy FIVE per cent from their sta.sment BE-
fore examining if the remainder imaginary not.
This especially true with improvements Of toe steam
ereipe Any one who will take the trouble to 90
our industrial reports Of last year would rd that every
gsuge dsnper regulator, governor cutoff &c,
from ten to fty per cent of the fuel all of which
ir ca added together woud amount 10 much more than
the total consumption. Under soch circumstances it
requires courage, and ia highly merorous, for
man to come forward stating only the truth This
was done yesterdy by Mr.. F. b. Blanchard Of New
York.
At the invitation of Mr. blanchard a number Of SCI
critic gentlemen and reporters of the press went up
the udson River board the steamboat John Go wan
which is propslled by steam engine and boiler Of
this gertlemans invention. The water for the trip
was contained in tank ard the quantity consumed
sscertained by messuraton. The coal was weighed.
The pressure indicated by steam gsuge. 10 this
manner the inventor mede no statement, bu. simply
showed what be did. The boat is 80 fee. long, y
feet BEAM 80 tuns measurement, diameter OF paddle
wheels % feet length of buckets feet, draught
feet II is propelled by an ordinary beam engine,
feet stroke sc inches diameter and bys bighpIessure
horizontal engine . feet stroke 81 inches dismeter.
The besm engine works at from 80 to 35 pounds and is
conde ensipg. The bighpressure engine works at from
so to 100 pounds. The steam escaping from 1t At
Of 80 to 35 pounds works the condensng en-
CINE. The boiler is tubular; the fsme moves TO the
end Of the boiler, and returning near the furnsce
through small tubes below the surface Of the water,
hence it passes through two cylinder fues placed
above the water into the steam. After leaving the
boiler the flame is conducted around the tubes
of several heaters in succession, and is finally
let out, perfectly cool, through smoke-pipe
6 inches in diameter. The fireplace is closet
alright TIE air is forced in by pump Tne CRATE
is higher in the CENTER and goes santing to the sdes
like the roof of house. AT thstop Of the fireplace
cylindrical opening with double door or valve; the up
per velve opened 50 pounds Of coal are put in end the
valve is closed The lower valve is thenopened and tue
coal falls upon the CRATE The santng shape OF the
gate is sucient to make the coal thus falling dispose
itself IN bed Of even thickness. Over ihe smoke-box
s the chimney; this is used only to light the fire, and
to keep it burning while the boat is at rest as soon as
the vessel is under way the chimney is closed by air.
tight valves and used no more. The new machine
works az foows: The steam from the boiler at 80 lbs.
pressure is made to pass through heater No. |, where
il is perfectly dried and expanded. Hence it works the
hlgn.presture cynnueI, Is cAPanuoa W '"'" S.' -
escapes at pressure Of 80 lbs through heater No.
to the low.pressure engine and the condenser. The
feed.water is heated to the boiling point in heater
No. before entering the boiler. The air supplied
TO the fire is heated in heater No. L. All the guests
ascertsred that go pounds Of coal were con-
sumed in getting up steam; thst sfterward l,ioo
pounds Of coal took the boat from NewYork to Hsver
straw, 6utsnce Of 40 miles. During the tnp, 3oI
cubic feet of water equal to 81 pounds, was trans
formed into steam. The steam passed into the cylr
der at 80 pounds pressure and temperature Of 800
Fahrenheit. The running time was three hours and
six minutes. This ergine consumes from iOO to iJo
pounds of coal per hour One OF the same power on
| the cormoa plan would require more than l,ooo
pounds Such resu is startling at first, but essiy
expsin.d Each pound Of coal requires for burniDgone
pound ard one third of oxygen. Air composed OF four
parts of nitrogen for part of oxygen and a. OILY
one half q the oxygen Of the air combines with coal
burned in a furnace results that for every pound OF
coal burned at a CRATE nearly II lbs of not gases
eecspe through the chimney. These gases have to be
at eMt Of the temperature Of COO to produce proper
draft; sometimes they escape red hot. Mr.. Blanchard
by me ans of bis heaters RECEIVERS this enormous
tit, Of heat TO raise sesm and h produces the
draft with q small fraction of the power thus saved
This invention is as simple it ia important and de-
serves attention from all persons Interested in steam
and especially in steam navigation.
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