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Graeve, Oscar (ed.) / Delineator
Vol. 118, No. 6 (June, 1931)

Pennock, Grace L.
Have you one of the new electric irons?,   p. 33 PDF (693.6 KB)

Page 33

J U N E.  1 931
Making a record of the per-
formance of the new electric
irons at Delineator Institute
AM - .1
THE newest electric irons have been made to meet the
demand for an iron that would keep hot continuously
under all conditions. They are known as iooo Watt irons
since they use 1000 Watts of electricity and therefore
have a greater heating capacity. We have discovered
that most irons of the usual 66o Watt rating, or less,
do not stay hot enough for our satisfaction in continuous
ironing of heavy linens or even cottons or plain work in
general. In this age of progress something had to be
done, and the new oo Watt iron and the iron with a
new and improved heating element have resulted.
Recent experiments at Delineator Institute have shown
iust what these new electric irons have to offer in the
way of service and convenience. The new irons of ioo
Watt capacity, and those using 66o Watts or less, were
used to give a comparison of their performance on the
same kind of ironing. Not only irons of iooo Watt and
66o or less were used but also irons with varying types
of heating elements. Some had automatic temperature
controls, others had merely a control to shut off the cur-
rent when a certain temperature was reached. Still
others had no temperature regulator whatever. These
irons varied not only in the type of heating unit, but in
the shape of the sole plate, in the handle, and in their
special convenience features.
The irons were used on various types of materials, on
silks, linens, cottons and rayons; on personal garments,
The ironing was com-
pleted more quickly
with the hotter iron
Two new irons kept temperatures
satisfactory for ironing linens but
the third one was not hot enough
bed linen, table linen-in fact the entire wash was ironed
many times. Then small sections of it were taken for
special and repeated studies. Charts from some of these
studies are reproduced on this page to show you the
different results that were obtained with different
irons.  Temperatures while ironing linens, cottons and
silks are shown. In the case of linens the 66o Watt
iron which gave satisfactory temperatures has a special
heating element.
Actual ironing is only one part of tests like these.
While the ironing is being done a record is kept of time
required for the iron to heat up as well as for the ironing.
The electric current used and, in the case of an automatic
iron, the number of operations of the temperature control
were recorded.   Perhaps most important of all is the
record of the temperature of the sole plate of the iron,
made during ironing. This last record is made by means
of a recording pyrometer. Small wires are placed in the
sole plate of the iron and are lodged close to its surface.
These wires are connected to a recording pyrometer and
as the ironing proceeds a graphic picture is recorded
by the pyrometer needle of the temperature of the iron
throughout the process.
In this way we are able to compare the ironing temper-
atures of irons of different heating capacities. These
charts, with the other records, give a picture of the en-
tire performance of each iron in use.
As we study these charts and records we find several
things of interest to you in the performance of these
higher wattage irons and of automatic and other irons
in general.
In ironing heavy materials the ioo Watt irons have
an advantage in that they maintain a higher temperature
than all except one of the irons of lesser capacity. The
one iron of smaller capacity has a specially designed
heating element which makes it particularly efficient.
Because of the higher temperature, ironing proceeds more
easily and more rapidly than with the irons of smaller
capacity and less efficiency.
There is also a saving of time with the moo0 Watt irons in
the period required for the iron to heat up to ironing
temperature as well as in the time it takes to do the
actual ironing.
Both the irons of ioo Watt capacity, and those of less,
maintain the lower temperatures needed for ironing silks
and synthetic fabrics when the regulator is placed at the
required setting. Here it isn't a question of needing all
the heat available, but of keeping the iron from becoming
too hot. An iron with the automatic control is almost
essential for satisfactory work on these materials, and the
accuracy of its setting determines how safely the
iron can be used on all fabrics. Just what temper-
ature is safe is partly a personal matter, for it depends
upon the speed of the worker and upon (Turn to page 74)
Both irons maintained
the low temperatures
needed in ironing silks
DELII                                             UTUE
Increased heat and controlled temperatures
make the purchase of the new irons profitable
I  T  U   T  E

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