Omaha daily bee., 1888-03-11

engraving can be increased or reduced
in size from the original to any desired
extent. This is accomplished by means
of the pantagraph arrangement, and by
which both the height and breadth OF
the engraving can be regulated, inde-
pendent of each other. Two or three
cells is all that is required to work the
instrument, and the work which it ac-
complishes is of the most varied char
acter, as we have had occasion to OBJ
serve. BY using diamond tool, glass,
stone and a whole variety of materials
can be engraved, and all kinds of sur
faces, straight and curved, can be
worked with the greatest ease. Among
the specimens Of work accomplished by
the apparatus, we have seen an engrav-
ing Of the Lords prayer, done
upon an agate cuff button of the size of
asilver dime.
The Hussey Re-Heater.
Electrical World: There is probably
noindustrial agent in the production
and use OF which there is more loss or
waste, or a wider and more interesting
field for the invention and application
of devices for ecoDomizing cost and in
creasing efficiency, than is to be found
in steam and in the appliances connect
ed with its use; and to-day steam enters
more largely into the industrial pro-
cesses carried on by mankind, and occu-
pies a more important relation to the
development of progress in the arts and
manufactures. and in the supply of the
growing demands of civilization, than
any other agent of industry. Probably
the two most important mediums of lost
energy to which the use of steam is now
subject, and which make the heaviest
drafts on the furnace fires, are the
waste gases of combustion escaping up
the chimney, and the exhaust steam
blown away into the air.
The Hussey re-heater has been de-
vised to retain and convert to profitable
use the energy hitherto lost through
these two avenues, and 1T has met with
considerable success. Its principal ap-
plications are to the re-heating of eX-
haust stegm, super-heating of live
steam, the heating and circulation of
air and heating of water, and it accom-
plishes these various results absolutely
without cost for fuel, by an ingenious,
but simple and practical me thod of util-
izing the heat conveyed in the gases of
combustion on their way from the fur
mace to the chimney.
1t is we'll known that these gases have
temperature in the furnace of from
1000 to $500 degrees, and it is a fact
not perhaps so generally known that
they carry into the flue, and retain for
some distance from the furnace, a tenn
perature of from 400 to 600 degrees.
The Hussey re-beater gathers up and
imparts to the exhaust of live steam or
air passing through it temperature
within about so degrees of the tempera-
ture of the gases in the flue, or such pro-
portion thereof as may be desirable for
any special purpose, and does this with
out cost for fuel. The temperature thus
impaired by the re-heater to its
passing con tents. can be regulated to any
desired extent and perfectly controlled,
SO that by means Of its use uniform tenn
peratures for those processes requiring
regularity and uniformity in heat can
be accurately maintained. Exhaust
steam leaving the cylinder of an engine
at temperature of about 2l2 degrees,
and saturated with moisture, can be re-
heated, highly vaporized, and made dryf
and elastic, by passing through the re-
heater and can then be distributed to
any required heights or distances for
heating purposes, without any appreci-
able back pressure on the engine, and
in state TO do effective service in heat
ing.
The advantages to be derived from
the use of the Hussey system in re-heat-
ing live steam will be obvious to all
pr actical steam users or engineers, when
it is understood that by means of this
device live steam can be superheated to
within so degrees of the temperature O
the ilue, without any additional cost,
and to any desired temperature above
that OF the hue with but very slight