The Providence news. (Providence [R.I.]) 1891-1906, 1893-04-13
SATISFACTORY RESULTS.
Test Of Two Engines Built by Arm
inStOn 4 Sims.
GENERAL INDUSTRIAL NEWS.
Meter Built by the Buiiders' Iron Foun-
dry-A New Vehicle wheel-Injunc-
tion Asked-what is Going ON Among
the Workers I'm the Mills.

the Workers In the Mills.
TIE Engineering Record publishes the
results OF the testing of Two ArminRton
e. Sims engines in the Summer street
station OF the Boston Electric Light COM
pany. The engines. though vertical, do
not differ in their general features or de-
sign. such as cylinders. valves and gov
erning apparatus. from the compound
horizontal Armington e. Sims engine.
which has been In the market number
of years. The valves are OF tho piston
type, and the high-pressure valve is the
one which Is operated upon ny the gov
erning mechanism. the cut-oh OK the low
ders are not steam -jacketed. They are
covered with non-conducting cement and
wooden tagging. The two cylinders are
independent OF each other. and the ex-
haust from the high pressure cylinder
passes to the low-pressure steam chest
through a connecting pipe, which is un-
covered. The diameter OF the hixh-pres-
sure cylinder Is 11.5 inches. OF the low
pressure 49, inches; the length OF stroke
is 13 inches .
The condensers aud air pumps are OF
the M. T. Davidson manufacture. The
air pumps are direct acting single-cylin-
der steam pumps. The steam cylinders
are 10 inches in diameter aud 10 inches
nominal stroke. The pump oyliuder Is
IA inches in diameter. The air pumps
are supplied with steam from the service
main. The exhaust OF the pump Is ar
ranged TO pass either to the atmosphere,
or to the condenser. AS desired. The ex-
haust pipe near the pump Is provided
with a straightaway cock, which Is kept
partly closed when the pump is exhaust
ing into the atmosphere, SO as TO secure
steady running This method Of opera
tion chokes the exhaust steam to such an
extent that it makes no difference in the
speed Of the pump with given position
OF the throttle valve whether the steam
Is passing to the atmosphere or to the
condenser. When the pump exhausts
into the condenser, this cock Is set wide
open.
The tests. 80 far as they related to the
engiues, were con fined to the determine
tion of the feed-water consumption. The
feed-water was weighed. before 1t was
supplied to the boiler, and fed by Han
cock inspirator, which was erected and
used solely for this purpose. 1t was sup
piled with steam taken from the service
main The tests were commenced and
ended with the engine running under its
working load, and they show the per-
formance of the englues, not for full
working day, including the period OF
warming up the cylinders and starting,
but rather the performances after the en-
gines have reached condition OF normal
action.
Two principal measurements were
taken-the quantity Of water fed TO the
boiler, aud the power developed by the
engine.
10 insure Trustworthy feed-water
test, all the stop valves In tie steam pip
ing which cut of communication with
other pipes than those concerned in the
running OF the engine under test were
closed. and satisfactory assurance was
ob,ained that there was little, IL any,
leakage through them. Valves separat-
ing the feed-water pipes from the regular
sources or water supply were closed, and
assurance likewise obtained that they
were tight. or practically tight. The
blow-of valves were also proved to be
these various valves, observations were
made at the close OF several preliminary
tests or the engines. to see how fast the
water disappeared in tho boilers after the
engine was shut down, and these obser-
vations showed a loss representing not
over 100 pounds Of water per hour. The
whole OF this quantity, or at least large
part of it, might easily have condensed
In the steam pipes and LODGED there
Diagrams taken from No / engine gave
. horse power amounting TO 157, and
The sc taken from No. 2 engine. 90 horse
803 revolutions per minute, and that OF
NO. 2, 391 revolutions per minute.
To Measure the Water supply.
The Builders Iron foundry of this city
have shipped TO Chicago 36-inch ven.
turf meter manufactured under the
patents of Clemens Herchel, G. T.. New
York city. This meter will be placed in
the extreme southeast corner of the
Ia
water supply of the Columbian exposi-
tion (about q, 600, 900 gallons a day.. The
recording apparatus will be exhibited in
the adjacent building of the Sewage
Cleansing WORKS.
An Injunction Asked.
The Clark Thread company OF New
York has filed bill of complaint against
Murphy, Hibben & Co.. In the United
The bill alleges tnat the plaintl ifs aud
their predecessors have, for one hundred
years, been manufacturing known AS
Clark's New Thread. There was for many
years an empIoye Of the COMPANY
named William Clark, who is in no way
name in the Clark Thread company.
Clark left their employ and started a
concern at Westerly, for the manufac-
ture of thread under the firm name OF
the William Clark Co., and II Is alleged
that William Clark Is advertising his
product rs 'Clark's New Thread"
A New Vehicle wheel.
A patent for vehicle wheel was issued
last week to Mr.. Joseph p. Manton oil
Providence. The wheel is tor bicycles or
trotting sulkies. ana the principle object
OF the improvements is o provide q tire
conducive to easy riding and speed by
having elasticity and lightness, to give
the advantage OF nonlabiity to easy
puncture. The construction OF the felly
OF the wheel enables the tire to be easi "
applied aud tighteled as required.
General Industrial News.
Joseph Guerin is soon to start spin
oing mill at Woonsocket. The machin.
cry consists Of two sets of Belgium cards
and two selfacting Platt mules of 4OC
snindles each. He will spin for n RI ias