вход по аккаунту


Патент USA US2405270

код для вставки
Aug.’ 6, 1946.
Filed Nov. '29. 1945
2 Sheets-Sheet 1
Au “sf/7f Pies:
Aug. 6, 1946. ~
Filed Nov. 29, 1943
2 Sheets-Sheet 2 >
14:19:15)“ H.
Patented Aug. 6, 1946
; 7
August H. Riess, Lawndale, Calif., assignor of
one-third toyH. Glen Manley, Hawthorne, Calif.
Application November 29, 1943, Serial No. 512,141
2 Claims.
This invention relates to electric flatirons, and
more particularly to such irons as are intended
to be heated by the passage of an electric cur
rent through a, heating element enclosed in the
(01. 219—25)
one embodiment of the invention. For this pur“
pose there is shown a form in the drawings ac
companying and forming part of the present
speci?cation. The form will now be described in
detail, illustrating the general principles of the
It is common to provide ?atirons with such
elements, energized as through a cord that is
plugged into an outlet. While it is possible to
disconnect the cord both from the outlet and the
socket after the iron attains the desired tempera.
invention; but it is to be understood that this
detailed description is not to be taken in a limit
ing sense, since the scope of this invention is best
ture, this requires repeated operations of con
necting and disconnecting the cord and plug.
Figure 1 is a top plan view of an embodiment
of the invention, a portion of the cover being
broken away;
It is one of the objects of this invention to
obviate the use of a cord, especially by providing
de?ned by the appended claims.
Referring to the drawings:
Fig. 2 is a sectional View, taken along plane
a convenient cordless circuit controlling device. 15 2—2 of Fig. 1;
For this purpose, a rest for the stand is pro
Fig. 3 is an enlarged sectional view, taken along
vided, so arranged that the act of placing the
iron thereon causes the heating circuit to be
plane 3-3 of Fig. 1;
Fig. 4 is a top plan dietail View, partly in sec
active, and under the control of a thermostat.
tion, illustrating the structure of one of the ele
The iron is thus brought up to operating tem 20 ments included in the circuit controller for the
perature, and is kept there within narrow limits.
Removal of the iron from the rest renders the
Fig. 5 is a sectional view on an enlarged scale,
heating circuit inactive. The heat stored in the
taken along plane 5—-5 of Fig. 1;
iron keeps it hot for a substantial period. Nor
6 is an enlarged sectional view, taken along
mal use of the iron being intermittent, the iron 25 plane E-—6 of Fig. 1;
remains on the stand long enough in the periods
Fig. 7 is a wiring diagram of the circuit con
of inactivity for operating temperature to be
trolling system embodied in the invention; and
maintained at all times.
Fig. 8 is a pictorial view of the rest for the
It is another object of this invention to simplify
the act of placing the iron in operative position .
The rest for the ?atiron ! (Figs. 1, 2 and 3) is
on the vrest. and without it being required to insert
so arranged that the flatiron may be readily
prongs or the like in a receptacle.
moved onto the base 2 of the rest. When the
To attain this object, the connection to the
iron is placed completely on the base, it serves to
heating element is effected by the aid of contact
connect the heating element 3 (Fig. '7) into a
plates located on the sides of the iron that con
heating circuit. The element 3 is indicated in
verge at the tip or point. The iron with the
dotted lines on Fig. 2.
plates acts as a wedge; moved onto the rest, the
The base 2 may be formed with appropriate
plates force contacts into engagement with con~
heat insulation, upon which the flatiron I may
tacts supported on the rest. It is accordingly
be rested without substantial loss of heat.
another object of this invention to provide an
In order to facilitate the connection of the
iron in which the terminals of the heating ele
heating element 3 with the circuit controllers
ment are formed as external plates attached to
supported upon the base 2, the terminals of the
the converging opposite sides of the iron.
heating element are connected respectively to the
The iron when placed in operative position in
conducting plates or contacts 4 and 5 (Figs, 1,
the rest is protected from excessive heating by
3 and 7). These contacts 6 and 5 are sup
the provision of a thermostatic switch carried by
ported externally of the iron and on the sides 6
the rest. It is another object of this invention
‘i (Fig. 2), which converge toward the tip of
to improve the performance of the thermostat,
the iron 2. As shown most clearly in
and particularly by mounting it on the rest in
plates may be insulated from the sides as by the
such position that it responds to the temperature 50 aid of the insulation layer 8.
attained at the exterior operating surface of the
These plates or contacts 5 and 5 are arranged
sole plate.
to cooperate with contact members that are mov
This invention possesses many other advan
tages, and has other objects which may be made
ably supported by the walls 9 and ill of the rest
(Figs, 1, 2, 3, 4 and 8). These walls are shown
more clearly apparent from a consideration of 55 in the present instance as formed of a continu
ous, upright piece of sheet metal, vertically sup
ported upon the base 2, and converging toward
the left, as viewed in Fig. 1, to conform with the
converging sides 6 and ‘I of the iron i. The walls
9 and ID are shown as supported upon the base
2 as by the aid of the ears I I, through which fas
tening screws [2 may pass.
The contact 4 cooperates with a contact mem
and 35, disposed one above the other, and sup
ported upon the base 2. These arms are main
tained insulated from each other by the aid of
the insulation blocks 36, through which may pass
a screw for holding arms 34 and 35 in position on
the base 2. The upper spring ?nger 34 may be
provided with a binding post 31, by the aid of
which the main 32 may be connected to this upper
ber, shown most clearly in Fig. 3, and arranged
barrel I3 is shown as supported with its axis
tact between contact points 38 and 39, carried
transverse to the wall 9. This barrel may be held
in place by the aid of a nut l4, threaded over the
barrel, for tightening the flange 1-5 of the barrel
the arrangement is such that the upper ?nger
Normally, the ?ngers 34 and 35 are urged to
to cause engagement of a pair of contacts by IO
ward each other in order to complete the con
placing the iron upon the base 2. Thus, a hollow
respectively by the ?ngers 34 and 35. However,
34 may be urged upwardly so as to open the cir
cuit. This upward movement is arranged to be
against the inner edge of an aperture in wall 9.
under control of a bimetallic strip 49, that is fas
Insulation washers l6 and an insulation sleeve
tened as by the screw 4| (Fig. 3) in the base 2.
ll serve to maintain the barrel l3 out of electric .
The upper surface of the bimetallic strip 40 is
contact with the wall 9.
Slidable within the barrel I3 is a contact point 20 normally ?ush with the upper surface of the
base 2.
88, shown in this instance as being provided with
a ball-like contacting surface 19, which projects
inwardly of the wall 9.
The point i8 is provided with a shank 29 that
extends through the lefthand end of the barrel
I3. A compression spring 2! in the barrel urges
the point l9 toward the right and into contact
with the contact 4, when the iron 1 is in a position
where it is completely disposed upon the base 2.
In Fig. 1, the iron has not yet arrived at this
position. The shank 29 is provided with a con
tact button 22 that is arranged to cooperate with
the contact 23, mounted on a spring ?nger 24.
This ?nger 24, as shown most clearly in Figs. 3
and 4, is mounted upon the base 2 as by the aid .
of the ear 25.
This strip 49, as shown most clearly in Fig. 1,
is arranged to be exposed on the base 2 adjacent
the place where the tip of the iron I would rest
when the iron is in place upon the base 2. Ac
cordingly, there is heat transfer from the sole
plate of the iron to the strip 49. When the tem
perature of the iron attains a limiting high value,
the bimetal strip 4!] curls upwardly. This causes
an insulation button 42 (Figs. 5 and 6) to move
upwardly to urge the spring ?nger 34 to open
position. In this way the circuit through the
contact points 38 and 39 is interrupted, and the
heating element 3 is de-energized.
The bimetallic strip 40, as shown most clearly
in Figs. 1 and 8, is purposely so arranged that
it responds to the temperatures attained at the
A similar contact member is supported on the
wall H1 and provided with a movable contact
most important portion of the ironing surface;
point 23. This contact point 26 is of the same
that is, adjacent the tip of the iron.
general structure as the contact point 18 and is 40
The temperature attained by the iron before
disposed so that it projects inwardly of the wall
the thermostatic switch device 3| operates, may
it. In this instance the button 2'! (Figs. 1 and 7)
be regulated. Adjustment is provided by aid of
cooperates with the spring ?nger 23 (shown in
a rotatable handle 43, carrying a threaded shank
greater detail in Fig. 5). Contact ?nger 23 is
44. This shank is threaded into the housing, or
shown as provided with the car 291, by the aid
cover 45, made from insulation material. Hous~
of which it is supported upon the base 2.
ing or cover 45 is disposed, as shown most clearly
As the iron moves inwardly, or toward the left
in Fig. 8, over that portion of the base which
as viewed in Fig. 1, the contacts 4 and 5 engage
supports the spring ?ngers 24 and 28, leaving
the contact points 13 and 26, urging them out
exposed the space between the walls 9 and I0.
wardly, and causing contact to be established be~
Projections 54 (Figs. 3 and 8) are formed on cover
tween the point It! and spring ?nger 24, as well 50 45 over the contact points It and 26. In this
as between point 23 and spring ?nger 28. Con
way, it is ensured that the iron I will be placed
tacts are established in this way, for sending
heating current through the unit 3, as indicated
by the wiring diagram in Fig. '7.
Thus, the mains 29 and 39 may be connected
to any appropriate source of current. Main 29
is connected to one terminal of a thermostatic
control device, shown in general by reference
on the base 2 by a sliding movement over the
base; and these projections further ensure against
inadvertent contact with live parts while the iron
is being heated.
The rounded end of threaded shank 44 pro
vides an adjustment for the thermostatic switch
3|, by being extended through an aperture in
character 3| in Fig. 7. This main 29 is also in
dicated in Figs. 1 and 5. The other terminal of 60 spring ?nger 34, and cooperating with an insu
lation disc 43, mounted on the spring ?nger 35.
the thermostatic control device 3| is connected
Turning the screw 44 inwardly causes engage~
as by conductors 32 and 33 (Figs, 1, 4 and '7) to
ment of the rounded end 4'! of shank 44 with the
the contact ?nger 24. The contact ?nger 28 may
disc 46. Spring ?nger 35 may thus be depressed
be directly connected to the main 39.
within limits. The contact 38 on spring ?nger
Accordingly, if we assume that thermostatic
34 stays in engagement with contact 39, for ?ngers
switch 3| is closed, the circuit for the heating unit
34 and 35 are urged toward each other by their
3 is completed when the ?atiron is in place upon
resilience. In this way, the clearance between
the rest, through main 29, thermostat 3!, con
the button 42 and spring ?nger 34 may be ad
ductors 32 and 33, ?nger 24, button 22, contact
justed, and the extent of curl of the bimetallic
member l8, contact 4, heating element 3, contact
strip 40 necessary to open the circuit, may be
5, contact member 26, button 21, ?nger 28, to the
main 30.
The handle 43 may include a pointer 48, co
The thermostatic switch 3| is shown to best
operating with a temperature scale 49 (Figs. 1
advantage in Figs. 5 and 6. This thermostatic
switch includes a pair of spring contact arms 34 75 and 8) on the cover 45. A friction spring 50
may be supported by the handle 43, cooperating
respective spring ?ngers before these members
with cover 45, to retain the adjustment in a re
carry any current.
leasable manner.
When the iron is in place upon the base 2,
it is desirable to indicate whether the circuit
through the heating element 3 is active or not.
This is accomplished in the present instance by
the aid of a small signal lamp 5| (Figs. 1 and '7).
The cover 45 thus effectively
shields the current carrying parts of the contact
The inventor claims:
1. In a rest for an electric iron, 21. base for the
iron, opposing walls between which the iron is
to enter, and supported on the base, a pair of
movable contact members, a pair of sleeves re
This signal lamp is connected in parallel with
the heating element 3. It is controlled by the 10 spectively supported by the walls, for said contact
members, to guide said members for movement
thermostatic switch 3|.
transversely of said walls, contact ?ngers respec
For this purpose, one terminal of the lamp 5!
is connected to the conductors 32 and 33. The
other terminal is connected as by a conductor
tively back of the walls and arranged to be con
nected to said members when said members move
52 to the barrel 53, associated with the contact 15 outwardly of the walls, and means forming a
protecting wall around said contact ?ngers, said
member 25.
means including an upper wall having projec
The cover 45 is provided with a viewing win
dow 55 (Fig. 8), through which the lamp 5|
tions overlying said contact members.
may be viewed. When the lamp is energized,
2. In combination, an electric iron having a
the user of the iron knows that the heating ele 20 heating element, as well as sides converging
ment 3 is also energized. As soon as the lamp
toward the tip of the iron, contacts carried ex
ternally of the sides and connected respectively
goes dark, it is an indication that the iron i has
been brought to the desired operating tempera
to the ends of the element, a base for the iron,
opposing walls supported on the base, and be
ture, the control device 3| being open.
By adjustment of the handle 43, the tempera
ture attained before the switch 3! operates may
easily be adjusted ‘by reference to the tempera
tween which the iron may enter, a pair of con
tact members, a pair of sleeves respectively sup
ported by the walls, for said contact members, to
guide said members for movement transversely
of said walls, each of said contact members hav
and 28, and their cooperating contact buttons 80 ing a contact point extending inwardly of the
such as 22 and 2'! (Fig.7), the contact members
Walls and contacted by the external contacts of
I 8 and 26, although exposed, are not connected
the iron, and contact ?ngers respectively back
to any live wire unless iron I is in place. Touch
of the walls and contacted by said members when
ing these members H3 or 26 inadvertently while
said members are moved by the iron in an out
ward direction.
the iron is removed from the rest, is harmless.
It is necessary for the contact members l8 and
26 to be urged outwardly into contact with the
ture scale 49.
Due to the provision of the contact ?ngers 24
Без категории
Размер файла
499 Кб
Пожаловаться на содержимое документа