The daily crescent. [volume] ([New Orleans, La.]) 1848-1851, 1849-12-07
NEUTRALITY-SUSPICIOUS.,

rus 'eSefit-in my last communication promised 10
make lew remarks Of the safety plans to ca
and point out what may be considered defects in this No
DOUBT will run counter TO tie interest Of some and The vanity
o. Others but as l. at one time projected cannot be
charged with interested motives my only wish bling TO rt
the care Of the boilers in the hands Of good engncer as one
Of the best Of safety guards
l. Extra Safety Lookup Valves In 1895 Gee Journal
The Franklin Instituted thus wrote:
In the law proposed during the last session Of our Con
Rre for regulating steam yee, find that some very esen.
mas III rt y e FS S S5 ?Ie % ne Progos q
tonal safety valve to the boiler This however, Is admitted
he valve should e ecure BY zng Boz Or bss st oTf e.
g prevent i being overloaded The regulation adopted
abroad for keeping the lookup valve from adenng 10 IL
eat namely 70 examine It at stated times, is imperfect a.
have known valves to cement 20 the seat m few hours from
the time of examining them The following simple arrange
ment would serve keep the lookup valve free suppoe
top Of this weight cord Or small chau, attached and
passing hn2ugh DE cover OF The bqx carried over pulley
engineer charge, and by which e raises IT. IL evident that
when the engineer Tais bis valve, the other viii be opened
simultaneously, and consequently the lookup valve viii be
prevented from cemeIting. -
will also make another short extract althoush not under
this head from the same paper:
The reasoning supported by the fact Just stated, proves
c9ncusyey that the generation Of steam vii. ne be quickly
tbe III Or 1Sn co1id ba ciG 60 et,sig u = s ss
air passing through the CRATES The damper and sdoors
being then opened tie enren Of cod a passing over the
Extra valves, if not Of large dmeo arranged above.
still consider necessary indicators Of the height OF tie
steam, and 10 prevent overlooking OF the main valve. Many
persons think that valve would be safeguard. If
there had been dozen the louisiana boilers they could
not have removed the sudden Of pressure which
capable Of tearing good boerron Ike paper and hurting
its fragments for hundreds Of yards.
In fact the management OF the afyvalve is like unto the
lancet IN the hand OF physician: at times u curative and
again it is fatal to the patient These valves only safety
ones when under the charge Of good eggiEo6r.
Floats for opening valves, whistles, etc. from their
liability to cement to couode uneHng etaes
g. Expansion arrangements cannot be iniaibei for crcum-
stances will and do arise, which there happens be intense
local heat and the only safeguard this plan wou1 be
work over the surface of the boiler
T. Balance Valves aside from the (at tes danger at
tending asudden discharge of steam, depending on Goat to
open them, are therefore unworthy Of confidence.
.. Opening Valves, etc. by combinations with 60 fusbe al
loys, have taken the strongest hold public opinion under
the belief that they uniform in their action and
ton to the contrary, founded experience, probably
would have weight, viii give part OF the experiments
with alloy, made by committee Of the Franklin institute
by the order Of former Secretary Of the Treasury promising
that the arrangement which they used was planned By Prof
A D. Bache and similar in principle the expired patent
plan Of G. Evans. Il consists Of tube the same metal ss
the boiler closed at the lower end, and passing hrOu Oh the
top of the boiler its closed end tile top of the ue 10
which IS attached Within this tube Is small rod having
button enlargement its lower end and its upper part
forming trigger in connection with valve bell To pre-
pare for the rod down and pour in small quan-
my oil the melted tusibe alloy, which, when cold, secures
the end OF the o ready for action. II that pant Of the fine
on which this tube rests becomes unduy heated, the alloy
melts and releases the rod and the aarum free After
the danger is removed it is ready TO act again.
By keeping the alloy in third tube this arrangement has
advantages the last patent plan of having " fusbe
metal the end Of the open tube, rs not 30 liable
to ozdize when the metal exposed to the action OF the
steam and water Beside the uncertainty the melting
these methods have the same objections apply No.
In the Of the Institutes many experiments with the
same alley The stem IN the tube at 1850 Fahrenheit zoo
24o, 2o 1852 and in some Of the trials the alloy had to
cool to 2I0o before it would hol' TIE stem fast.
In the committee staes fact noticed during the
experiments fusihe alloys, again verified in these
namely, thal ne m4i1IeS OF meias rsnFe cosigrabe
the former they may be ased # heated rapidly above
may be eYoed much below Ibis temperature, without 50
Agap 'sThat when fue plugs or plates are exposed IL
heat and pressure parts Of tem soften below
exposed TO pressure, these fluid pats forced out, leaving
~ 9 9 mas, In one case {hs Gaeraa was carried
i2 to 2l52 Fahrenheit, was produced mass lsbe only
| found to melt at 225o, and another 2335.''
6. The hIanomeer, (niscaIed by some Mcrcury-eauge
although 1t Is not always correct one Of the appcuages tC
boiler that can be recommended, assists the Judgment
| of the engineer.
2. The exact height Of the water the boiler being great
importance, can recommend my plan Of gauge uIe " as
certain guide for knowing the line Of water when flaming.
This plan has been tested b. many for fifteen years back on
the various kinds of boilers For those who do choose
to get them of will give such directions will enable
any ordinary workman 10 make them.
Have tube, (of the metal the boiler, about q
inches in diameter and 10 u inches long top Of this
gauge-ube, (placed vertically front Of the boierlead)
let pipe of uch bore pass through the head and be con.
timed up 10 the highest part Of the boiler TO the lower end Of
the gaugetube; have another 3ainch pipe passing into the
head below the lowest waterne in this pipe and between the
head and tube, have stopcOck Place in the large tube the
usual gaugecocks. When this c0nnectioncock Is open then
the gaugecOCks act precisely if they placed directly in
the boerhead there auy doubt about the water ne shut
the connecOn-Cock and open of the guugecock begin.
ming the top If the should flow OF one OF
these cocks, the length of time takes discharge with
little practice, viii tell how high above it. One Of the
1rgfer eQF
forced out to The IC0e Of the gaHgecock, and By
opening the lower communication with the boiler and again
shutting of, the experiment may be repeated pleasure
| and always with the same result
- Respectfully yours, A. c. JONES.
Il know that many good engineers have left the river on ae
Of not being paid enough for their professional
Independent Of the loss of health consequent engineering
the river. 10 know Of engineer who has been on t
river Tor ten year who has not broken constitution