The Oakley herald. [volume] (Oakley, Idaho) 1908-1961, 1920-04-30

degrees OF neat with an electric furnace this Is
done by simply combining heat units of varying
resistance, according to the degree of heat de-
Sired in the furnace
The war was responsible for many new devices
designed with view to Increasing production
quickly. One of the things the government need
ed most was ships-lots of them, and in building
ships enormous amount of rivets have to be
heated, and that quickly. The usual method or
heating these rivets was in forge usually burn
ing coke or oil as fuel, which after a care
full survey, found to be woefully inefficient. The
attendance was large, requiring blower as
well as a passer large quantities of rivets
burned, welded together. insufficently heated
in the forge, and when it had to be taken into the
hold of the ship for USE the difficulties of oper-
alton were only exceeded by the vileness of the
atmosphere resulting from the fumes Of the forge.
The result was the electric rivet heater. Rivets
are heated by inserting them between two
copper bars carrying heavy current, supplied
by a transformer Since the iron Of the rivets
themselves Is material of high resistance they
are heated thoroughly and quickly. The bars
operated by foot pedal, that when the rivets
are removed, or are being placed in position to
be heated, the current ceases to flow. The whole
apparatus is easily portable
1t was found that this simple machine heated
the rivets throughout: that, inasmuch as the en-
ergy used only when the rivets were actually
being heated, there was no waste Of heat that
there no noxious fumes spoiled and vast
ed rvets and that the machine was nearly fool
proof. The attendance reduced to a mini
mum, and there necessity of supplying
fuel with the consequent trouble in disposing of
the ashes when 1t being operated in more
less inaccessible parts of a ship. 1t has a ca
pacity of 500 Il finch rivets / inch long per
hour which is enough under ordinary conditions
for gang of gun rveters.
The place where electric heat has found its
greatest application from the standpoint of num-
Der of installations at least Is In the electrically
heated oven, or airdryng and baking apparatus
as one prefers. 1t is surprising how many pred
ucts that necessities of our everyday life re-
quire treatment somewhere in the course
of their manufacture.
Electric used more In the automobile
industry than in any other field. Here 100000
XIV are used in baking the japan on 1900 auto
mobile bodies every day In few years the au-
tomobe whose japanned parts are not baked in
electric oven will be rarity. Other large
users of electric ovens foundries for baking
cores; telephone and typewriter manufacturers;
manufacturers of iron and bed frames and chem
icn manufacturers of various sorts
Oven processes include baking air temperng.
drying and sherardizng. OF these four the first
is the most used, the other two are quite com
mon, and the last is process for protecting ex-
posed iron parts from corroson.
In many of these processes. accurate regulation
of heat, and automatic control are absolutely nee
essary. because many materials are irrevocabIy
ruined by slight change in the temperature OF
the oven. And here again manufacturers have
found that the saving in material which was
spoiled by the vagaries of the fuelheated furnace
has more than paid for the increased expense of
installing and operating bank of electric ovens
or these three classes of ovens those installed
for baking are the most numerous The work
they do varies: baking japan various articles