The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1895-09-15

from compressor run by 50-horse
power engine. Instead of transmitting
the power from the engine by means
Of belts, shafts and pulleys, air is
tubed to each machine, as in the case
of the drills in the mines and tunnels,
and the air released by the operation
of the machines, assists in the ventil-
lation of the shop and adds to the
comfort of the workmen. The cost Of
installation and Operation are about
the same as if steam power were used
directly.
The use of compressed air in guns,
attempted on the so-called dynamite
cruiser Vesuvius, otherwise, does not
seem to have been quite successful, but
it is said that the locomotive torpe-
does" in which compressed air, filing
all the interior of the torpedo except
that portion occupied by the charge
operates the screw giving motion to
the machine, works to the entire salts
faction of the government officers.
Pumping and Freezing with Conn
pressed Air.
A very interesting and simple ma
chine is the compressed air pump.
which will force water or any other
liquid from any depth or to any
height and that without regard to
the amount of dirt, sticks, stones or
other foreign substances that may be
contained in the liquid. The workings
of this pump are made clear by one
of the accompanying cuts. 1t is sim
plicity itself, consisting merely of two
pipes, an air pipe being run alongside
the one through which the LIQUID to
be pumped is discharged. The air is
then liberated at the lower end of the
NH nd 10 70
surface. There are no valves or pistons
or buckets to get out of order, and
nothing smaller than the discharge
pipes diameter can clog the APP
paratus. Of course there must be a
compressor and engine with every
pump but with these provided all
that is necessary to do is to turn on
/ the air and see the stream flow. This
is q comparatively new coptrivance
and so is the employment of air re-
frigeration purposes in place of
anhydrous ammonia. The use of COM
| pressed air as a freezing agent was
! Saunders of New York to whose
! courtesy the writer is indebted for a
large portion Of the information in this
article:
"When air is brought to q high pres
! SIRE" said Mr.. Saunders. .'the parti-
Giles are crushed closely together and
there is a tremendous lot of friction
and this generates an immense amount
! of heat. So great is this heat that the
air cylinders Of cOmpressors nave to
| be iacketed with water to keep them
from becoming red not. Now, when
! the air EXPANDS. after having cooled
| in it's compressed state, it steals heat
! from whatever il comes in contact
with thus producing refrigeration
much more cheaply and with greater
safety and cleanliness than can be
produced by any other means
So much impressed have been GER
tain men in one of the cities of the
west that proposition has been made
To Law pipes in the streets there fol
the purpose of supplying customers
4 with cold air and doing away with tbs
consumption of ice.
Pneumatic Tubes md the Limit II
Their Utility.
Tn rheumatic transportation
through tubes, the atmosphere is EN-
nloved at too low a pressure to pe
properly termed compressed ar an.
! in some cases a vacuum and no pres
sure at all is used. Pneumatic tube
TRANSFORMATION is used on a small scale
in thousands Of business and manu-
featuring establishments in America
for the moving of small cash and othe
1 packages, but its use upon larg'
4 scale in this country is not extensive
| Mail matter is carried by air in bu
one American city-Philadelphia Tn
adoption of a sirailar system between
the postoffices of New York an
Brooklyn has been advocated for som
years, but no favorable decision as t.
the proposition has yet been made b.
the authorities, certain newspape
statements to the contrary notwith
standing. The pneumatic tubes in Phil
adelphia. though not the longest ar
the largest in the world, being 81
inches in diameter. They lead from
the main postoffice to a sub-station
half-mile distant, and return unde
Market street. During the first yea
of it's life the apparatus was maintain
ed at the expense of its makers, an
it's performances were, SO satisfactor
that the plant has now, been accepte
by the government. Only seven pound