вход по аккаунту


Патент USA US3098931

код для вставки
July Z3, 1963
J. J. PAxToN
Filed March 2l, 1962
2 Sheets-Sheet 1
4July 23, 1963
J. J. PAxToN
Filed March 21, 1962
2 Sheets-Sheet 2
FIG. 3
United Sites Patent O ” HC@
Patented July 23, 1963
ends of the lamp to allow for the conduction of ‘heat away
lfrom the lamp ends.
John J. Paxton, Amwell Road, Middlebush, NJ.
Filed Mar. 21, 1962, Ser. No. 181,325
1 Claim. (Cl. 219--Z5)
lStill further objects will become apparent in the follow
ing detailed descritpion of an embodiment of the inven
tion illustrated in the drawings in which:
FIGURE l is a longitudinal sectional view of a smooth
The present invention relates in genera-l to an ironing
-device and, more speciiically, to an electrically operated
hand smoothing iron for domestic use.
In order to attain optimum performance in a smooth
ing iron, it is desirable to maintain an even temperature
at a selected level throughout the entire smoothing sur
face of Such an iron. lIt would be advantageous, from
the standpoint of la user, to be able to achieve light
ing iron constructed in accordance with the invention;
FIGURE 2 is a plan view of the iron of FIGURE l;
FIGURE 3 is a transverse sectional view taken along
line y3-13 of FIGURE 2;
FIGURE 4 is a diagrammatic transverse sectional view
illustrating a specific reflector configuration;
FIGURE 5 is a diagrammatic transverse sectional view
illustrating an alternative specific reñector configuration;
weight, quick heating and low power demands in a do 15 and
»FIGURE 6 is a sectional detail taken along line 6_6
mestic smoothing iron. However, these conditions lead
of lFIGURE l.
to contradictory requirements in conventional designs for
Referring iirst to FIGURES 1, 2 and 3, an electrically
such irons. Even temperatures have called `for a rela
operated smoothing `iron is indicated generally at 1. Iron
tively heavy sole plate with the result that quick heating
has` required relatively high power demands. The inven 20 1 is made up of a main body 2, a handle l3 fixed to the
tion has been devised to provide a smoothing iron for
domestic use incorporating all of the desirable features
outlined above.
upper surface of the main body and a sole plate 4.
Smoothing surface 5 of sole plate 4 performs lthe ironing
operation when it is raised to proper operating tempera
ture by internal heating means which will be more spe
A primary object of the invention is to provide a
smoothing iron which maintains a selected, even tempera 25 c‘iñcally described hereinafter. Sole plate 4 is fixed to
body 2 by means of screws 7. 'llhe flow of heat from
ture throughout its entire smoothing surface.
the sole plate to the body is impeded by insulating means
Another object is to provide a domestic smoothing iron
`8 placed between body 2 and sole plate 4.
which is light in weight and which will come up to oper
ating temperature rapidly while making relatively low
The sole plate 4 is heated by an electrically operated
power demands.
A further object is to provide a hand iron which is
source of relatively short Wave infrared radiation indi
easily fabricated of a minimum number of parts and
wherein the operating elements are readily accessible and
source 10 is a tubular quartz infrared lamp 1l (commer
cially available in the form of the General Electric Type
easily replaced.
T-‘3 lamp) o-f «approximately 500 watts capacity. Such
The invention may be described brieily as an electric
smoothing iron having a thin, metallic sole plate with an
absorbing surface and a smoothing surface and a high
thermal conductivity. The sole plate is heated by an elon
cated generally at 10. In the preferred embodiment, the
a lamp «is small in diameter (about three-eighths of an
inch) and produces a concentrated, narrow band of in
tense infrared radiation along a central portion 12‘. Ends
13a and 13b are provided for connecting the lamp to a
source of electric current. Since the ñlarnent of the lamp
gated tubular quartz infrared lamp lying in la plane par
allel to and vertically above the absorbing surface. A 40 operates at a very high- temperature (about 40'00" F.) the
infrared radiation is of a short wave length relative to
reflector is dis-posed above and to the sides of the lamp
infrared energy radiated by conventional electric heaters.
and ñxed to the sole plate adjacent the periphery thereof
Filaments of conventional lamps are operated at still
so as to establish an envelope enclosing a substantial por
higher temperatures since their primary function is to pro
tion of the length of the lamp between the reflector and
vide light rather than heat and are not economical vfor
the sole plate, the ends of the `lamp projecting through
heating purposes. Unlike the conventional lamp, the
the reilector and outside the envelope, the enclosed por
infrared lamp will radiate most of the energy supplied
tion of the lamp bearing such a relationship to the reiiec
to it in the form of intense infrared radiation making it
tor and the absorbing surface that the direct radiation
and reiiected radiation from the lamp are combined to
tend to provide an even distribution of infrared radiation
an eilicient, :as well as abundant, source of heat.
being disposed adjacent the ends of the lampy and being
detachably electrically connected thereto for conducting
plate las possible within the envelope 13 enclosing the
A reilector 14 is provided to direct and aid in control
ling the high intensity infrared radiant energy so that
throughout the absorbing surface wherein the radiation
such energy is eifectively utilized to heat the sole plate 4
is converted into heat conducted through the sole plate
and raise the temperature of the smoothing surface 5.
for raising the temperature evenly throughout the smooth
Reflector 14 -is placed about the source 10, above and to
ing surface. In order to regulate the temperature of the 55 the sides of the source, and is iiXed at its edge 15 to sole
smoothing surface, a thermostat Áis mounted outside the
plate 4 by wel-ding, brazing, riveting or like means, as
envelope and is responsive to the temperature of the sole
near to the perimeter of the sole plate as is practicable.
plate for intermittently interrupting the ilow of electricity
The ends 13a and 13b of the `lamp 1:1 project through the
to the lamp to regulate the emanation of energy from the
ends 16 of the reñector leaving the central portion 12 of
lamp and maintain the temperature of the smoothing sur 60 lamp 111 enveloped between the reflector and the sole
plate. lInsulating grommets 17 «aid in holding lamp 11 in
face at a selected value. A main body is detachably
place relative to the reflector while serving to impede the
secured to the sole plate and envelops the reflector and
the projecting ends of the lamp as well as the thermostat
flow of heat through conduction to the reflector and
and carries electrical contacts ymechanically secured 65 through radiation toward the ends of the lamp. Thus, the
thereto and electrically insulated therefrom, the contacts
reilector area stretches to encompass as much of the sole
source 10.
electrical operating current to the lamp. Since it is essen
Sole plate 4 is relatively thin (up to about one-eighth
tial to maintain the ends of the tubular quartz infrared 70 of an inch) and is fabricated of a material having a high
lamp cool relative to the enclosed heating portion, vent
means are provided in the body adjacent the projecting
thermal conductivity such as, for example, aluminum. In
addition to smoothing surface 5, an absorbing surface `19
is provided on the internal face of the sole plate within
envelope 1S. The absorbing surface is preferably
sole plate through a strip 26 of high thermal conduc
tit/ity. Strip 26 may be thermally insulated from the
roughened and blackened so as to enhance its radiation
thermostat support 'arm 27 by insulating means 28. The
thermostat is set by means of control knob 29‘ to inter
rupt the llow of electric current to the lamp when the sole
absorbing ability. The reflector 14 is so shaped and the
lamp 'll so located relative to the reflector that the re
flected radiation is distributed throughout the entire ab
sorbing surface A19. Because of the relatively short wave
length of the infrared radiation, little radi-ation is ab
sorbed by the surrounding air in envelope 18, the radia
tion being effectively projected by the source and directed 10
plate is at a desired temperature. The rapid, eflicient
transfer of energy from the source to the sole plate
secured by the instantaneous operation of the lamp and
the effective reflector system in combination with the
thermostat which quickly senses the temperature of the
to absorbing surface i9“ in a manner similar to the Way
sole plate «assures that the selected temperature is accu
in which light rays may be directed. The radiation is
absorbed in surface i9 thus raising the temperature of the
surface and causing heat to be conducted to the smooth
rately maintained at a constant level. Thus, the tempera
ture of the smoothing surface 5 is regulated by a positive
control. The positive control lobtained from the employ
ing surface.
ment of a thermostat lis important from another stand
The employment of «a narrow band source of intense
infrared radiation makes possible the use of reflector
Continuous operation of the |lamp would soon
shapes that will tend to even yout the distribution `of re
cause the high intensity infrared radiation from the source
to build up enough heat to melt the light-weight metallic
ilected radiation so that the combination of direct and
r‘eñected radiation results in an even heating of the ab
sorbing surface and «an even temperature is attained rapid
components that constitute the primary elements of the
device. However, the controlled, intermittent «operation
ly throughout the smoothing surface. This feature corn
bined with the practically instantaneous operation =of the
secured through the use of thermostat 2S combined with
the eíiicient reflector system ensures that enough energy
is transferred from the lamp to the sole plate to rapidly
lamp allows a rapid, eñìcient transfer 4of energy from the
source to the smoothing surface. Since the sole plate is
heat the smoothing surface to a selected temperature
while the emanation of amounts of energy from the
thin rand highly conductive, any small differences in tern
perature throughout the area of the sole plate will be
rapidly equalized to provide an even temperature through
out the smoothing surface.
source which could prove harmful is prevented. Thus,
the thermostat makes practical the use of light-weight
components where conventional irons would require
heavier elements.
While the reflector may assume any yone of a number 30
Window 30 is provided in body 2 so that the small
of shapes, FIGURES 4 and ‘5 illustrate two simple con
amount of light emanating from the protruding »length of
ñgurations which may be utilized to control the distribu
the Ilamp adjacent end 13b is made visible. When the
tion of ldirect rand reflected radiation in such a Way that
iron is first turned ron, the lamp will light instantaneously.
said distribution is optimized.
When the sole plate is up to the temperature selected, the
FIGURE 4 shows a retiector ‘14a having 'a parabolic 35 electricity will be cut off by the thermostat causing the
profile `over sole plate 4 with the lamp ylll placed slightly
lamp t-o shut olf. The user may observe this shut-off
above the focus F of the reflector 14a. It will be under
point which is an indication that the selected smoothing
stood readily that the longer the travel of a Iray of energy
surface temperature has been reached.
from source to absorbing surface, the weaker will be its
'Ihe characteristics of the tubular quartz infrared lamp
intensity =at the absorbing surface. Hence, the direct 40 require that the ends be kept relatively cool (below 650°
radiation D at point X will be weaker than direct radia
F). To this end, vent holes 31 are provided in body 2
tion D' at point L. However, the placement `of the lamp
to maintain the proper temperature in the vicinity of the
11 relative to the reilector 14a causes the reilected rays
lamp ends. Insulating grommets 17 also aid in prevent
R and R' to` diverge slightly and reinforce the Iweaker
ing the temperature of the ends from rising to an un
direct radiation, thus tending to even out the distribution 45 desirable value as outlined hereinbefore.
of total radiation across the absorbing surface 19‘.
When it becomes necessary to replace lamp 111, screws
FIGURE l5 illustrates a reñector 14b of a semi-cardi
7 are removed. Main body 2 is lifted upwardly from the
oid-like configuration. Here, the total distance traveled
sole plate `4. Clips 22 will disengage from ends 13a and
by reflected rays and direct rays to a given point will be
413b as reflector :14, ñrmly attached to sole plate 4 holds
balanced for all points across the absorbing surface, thus 50 the lamp in place. Thermostat 25 remains fixed to arm
optimizing the distribution of energy from source to sole
27 of the sole plate, loops 32 being provided in electri
plate. For example, the total of the length of reñected
cal condutors 21 to allow for enough slack so that the
ray R plus the length of direct ray D to point X is made
body may be removed from the sole plate. The lamp
to balance the total of the length of reñected ray R' plus
may then be slipped out of engagement with the reflec
the ‘length of direct ray D’ so that the total intensity of 55 tor.
energy falling upon absorbing surface 19A at point X tends
The primary components of the device such as the sole
to equal the amount at point L.
plate, reñector and main body may be easily and eco
’Ihe reñect'or may be fabricated of Áa highly polished
nomically fabricated from light-weight sheet material
material and is preferably constructed `of aluminum.
such Ias, for example, aluminum, the necessity for heavy
Since the reflector is in direct contact with the sole plate, 60 cast materials having been eliminated.
any heat which «is incidentally absorbed by the «reñector
As a result of simplicity of design and the employ
will be conducted `directly to the sole plate; however, the
ment of light-Weight materials, an iron may be con
greatest portion of the energy radiated by the source is
structed as described above which will have a »weight of
directed against the sole plate in the form of radiation,
less than twenty-four ounces as opopsed to conventional
both direct and reilected.
65 counterparts of up to approximately three pounds in
Source 10 is energized by electric current supplied at
weight. Temperatures in the range of about 200° F. to
plug 20 which is fixed to handle 3 and carried to the
550° F. are readily obtainable utilizing an intermittently
'lamp ends through insulated conductors 21 which are
operating lamp of 500 watts capacity as opposed to the
fixed to clips 22. Clips 22 resiliently grip the ends 13a
1000 watts demand of conventional domestic smoothing
and 13b of the Ilamp 11 and are mounted upon and elec 70 irons. Thus, the instantaneous power demand is reduced
trically insulated from the main body 2 by dielectric
by a factor of two in the device of the invention and less
mounts ‘23 held in place by screws 24 ras shown in detail
stringent demands are made upon household electrical
in FIGURE 6.
circuits. Furthermore, the instantaneous operation of
A thermostat 2S `of conventional design is placed in
the lamp combined with the etlicient and rapid conversion
series with the lamp and senses the temperature of the 75 of the radiation from the source into heat at an even
temperature throughout the smoothing surface results in
the attainment of useful operating temperatures within
ducted through said sole plate for raising the tempera
ture evenly throughout said smoothing surface;
an average of about twenty seconds after yfirst turning on
the device.
It is runderstood that the above detailed description of
[D] a thermostat mounted outside said envelope and
responsive to the temperature of said sole plate for
an embodiment of the invention is provided by way of
example only, and is not intended to restrict the inven
tion. Modifications land changes in various details may
be made -without departing from the true spirit and scope
of the invention as set forth in the appended claim.
I claim:
An electrically operated smoothing iron comprising:
[A] a thin, metallic sole plate having an absorbing
surface and a smoothing surface and a high thermal
[B] an elongated tubular quartz infrared lamp lying
in a plane parallel to and vertically above said ab»
sorbing surface;
[C] a reflector disposed above and to the sides of said
lamp and ñxed to said sole plate adjacent the pe 20
riphery thereof so as to establish an envelope en
closing a substantial portion of the length of said
lamp between said reflector and said sole plate, the
ends of said lamp projecting through said reflector 25
and outside said envelope and the enclosed portion
of the lamp bearing such a relationship to said reflec~
intermittently interrupting the ñow of electricity
to said lamp to regulate the emanation of energy
from said lamp and maintain the temperature of
said smoothing surface at a selected value;
[E] a main body detachably secured to said sole plate
and enveloping said reflector and the projecting ends
of said lamp;
[-F] electrical contacts mechanically secured to said
main body and electrically insulated therefrom, said
contacts being disposed adjacent said ends of said
lamp and being detachably electrically connected
thereto for conducting electrical operating current
to said lamp; and
[G] vent means in said body adjacent said projecting
ends of said lamp for maintaining said ends rela
tively cool in comparison to the portion of said lamp
lying within said envelope.
References Cited in the ñle of this patent
Bastian ______________ __ July 9, 19.12
II-Ieyroth et al. _______ __ Apr. l0, 1934
Walkup _____________ __ iNov. 19, 1940
{Roesch _____________ __. Nov. 26, 1940
Boyd ________________ __ Mar. 26, »1946
bined to tend to provide an even distribution of in 30
Olving _______________ __ July 2, 1946
frared radiation throughout said absorbing surface
Finlayson ____________ __ Jan. 22, 11957
wherein the radiation is converted into heat con
Miskella _____________ __ July 22, 1958
tor and said absorbing surface that the direct radia
tion and reñected radiation from said lamp are com
Без категории
Размер файла
547 Кб
Пожаловаться на содержимое документа