Evening star., 1926-11-20

, electricgas type a gas pilot is auto
matically turned on. the gas being ig-
nited by spark. while in the case of
the electric-oil type an Independent
mixture of atomized oil Is ignited by
an electric arc.
An oil fame heats rapidly. and II
not controlled in some manner will
build up dangerous temperatures and
pressures, since the overheating con-
tinues as long as the oil supply lasts.
The simple gravity.feed, vaporizing
type Is generally controlled by hand.
When the house is deserted the fire Is
either extinguished or cut down so as
to maintain temperature sufficient to
prevent freeze-ups. Some burners Of
this type do not operate satisfactorily
if throttled, and II is safer to cut off
the flame entirely and use other means
to prevent freezing. The power-atom-
mizing type of burner Is better adapt
ed to automatic control than the grav-
ity type and 1t is on this type that
such controls have been most success.
fully utilized.
Use Of ThermOstat.
The thermostat Is the device on au-
tomato burners which renders the
burners active or inactive in the proc
ess of maintaining desired room tenn
peratures. 1t contains a member. ac-
tuated by temperature changes, which
operates to maintain constant tenn
perature by shutting off or starting
the burner. 1t is placed In room In
which 1t Ia desired to maintain a con-
slant temperature. and Is adjusted to
the desired temperature by mnving a
pointer which passes along a scale
graduated in degrees Fahrenheit.
Automatic oil burners are provided
In odd tn q
room thermostat. These are termed
hydrostats If it Is a hot-water system
and pressurestats II steam system.
These devices keep the steam or water
temperature at the boiler within safe
limits rega ardless Of the room tempera
ture.
In addition to the controls mention
ed 1t is necessary that provision be
made for cutting off the burner In the
event that ignition fails to take place.
This Is accomplished in some burners
by drip bucket or sump float. which
trips when certain amount of oil
reaches it and either stops the flow
Of oil or breaks the power circuit. The
machine must then be set by hand be-
fore operation can be resumed. An
other device Is designed on the as
sumption that as long as the pilot
light burns the charge will he ignited.
and a thermostatic member Is accord
ingly exposed TO the heat OF the pilot
light. which breaks the power circuit
should the pilot light he accidentally
extinguished. In other types ther-
mostatic member is placed in the
stack, which,, after a predetermined
period. breaks the power circuit and
stops the motor and the supply OF oil.
provided the stack does not become
heated within that time.
Need of Good Service.
In selecting a, burner 1t Is well to
secure in advance all of the informa
ton possible. keeping in mind expert
ences of other purchasers. and not to
seek the best" burner, but rather the
one that is handled by a reliable or
ganization which employs capable men
to service their product. 1t is safe to
conclude that such an organization
will handle at least a reasonably good
product.
A number Of items should be consid
cred in selecting an oil burner The
relia bilitv of the local representative
and stability of his business are i'm
portant. A first.grade burner improp-
erly installed, or without opportunity
of procuring service, will be unsatis-
factory. One should know the grade
OF Iue1 WHICH, Tue OuI IicI ~ pcDlC vi
burning. Tests show that the burn
ers which burn the relatively low
grades of oils attain the greatest
economy.
The type of fuel available in the
community Is to be kept in mind in
selecting a burner. A burner which
is noisy is highly objectionable. The
purchaser may insist on noise clause
in his contract, so that in the event
thatsthe noise proves unbearable after
a reasonable trial. the contractor will
remove the burner and relieve the pur-
chaser of all obligations. Burners
differ in the amount of cleaning and
attention required. Some buyers in
sist upon burner which may readily
be removed and allow the replace
ment Of CRATES, in order to return to
coal burning in the event that the oil
burner should fall.
Question Of Electricity.
If 1t requires electricity for opera
ton and the current supply is subject
to interruption the owner should in
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