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Патент USA US2410985

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Nov. 12, 1946.
o. v. MALMQUIST
2,410,985
TOASTER
Filed Jan. 22, 1945
2 Sheets-Sheet 2
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Patented Nov. 12, 1946
2,410,985; '
UNITED STATES PATENT, OFFICE
2,410,985
'roas'rcn v
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Oscar V. Malmquist, Minneapolis, Minn.
._ Application January 22, 1945, Serial No. 573,903
11 Claims. ‘(01. 99-341)
1
My invention relates to electric toasters and
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‘ in the form of a rectangular slot 6, of a size to
freely receive a slice ofbread therein. Slot 6
is the entrance to a toasting chamber 6a which
has for its object the provision of a device of
this type which will toast a slice of bread both
more rapidly and uniformly'than electric toasters
heretofore developed.
5
has vertically disposed sides ‘I and 8, and-‘verti
cal end pieces 9 and Ill and a rounded bottom II.
It will be observed that sides 1 and 8 of the toast
ing chamber while parallel to sides 2 and 3 of
Another object of my invention is to provide
‘a toaster which is durable in use and which is
relatively inexpensive to manufacture.
It has long been the object of manufacturers’
of toasters to provide a device which would toast 10
the bread uniformly, to wit: free of design or
pattern.
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,
Design or pattern is caused by an un- »
even distribution upon the-bread slice of the
heat emanating from the heating means and
the housing I ,v are spaced inwardly therefrom a
considerable distance. Likewise, sides 9 and I0
of heating chamber, While substantially parallel
to the vertical ends 4 and 5 of the housing are
also inwardly spaced therefrom a distance at
least su?icient to permit wiring and the like. As
shown,‘ it has been found practical to make end
can be avoided by moving the bread through the 15 members llv and I0 and rounded bottom member I
II from a single narrow strip of metal.
heating or toasting chamber. However, it has
Vertical side members ‘I and 8, vertical end
‘been found that the length of the heating cham
members 9 and III and rounded bottom II of the
toasting chamber to are all made from polished
ber and hence of the heater itself must be so
increased by movement of the bread through the
I heating chamber that the cost of the toaster is 20 metal capable of standing the relatively high de
unduly increased.
' gree of heat to which such toasters are subjected.
In my novel toaster, I have designed a rela
tively foolproof mechanism which will constantly
As shown, each of the vertical side members
; “l and 8 of the toasting chamber is provided with
serpentine depressions or recesses I2 through
rotate the bread while the same is in the heat-,
ing or toasting chamber, thus producing a slice .25 which heating coils I3 are wound. As shown in .
Fig. 1, the center of each curve in the recess is
of toast of uniform color, free from so-called
pattern. Furthermore, I have accomplished this
result without increasing the length of the toast
ing chamber and withoutincreasing the cost of
provided with'a porcelain insulator I4, suitably
toaster.
ber. Also, with reference to Fig. 2 the serpentine
secured to the side members ‘I and 8, so as to
. ‘prevent contact of the heating coils I3 with the
the toaster beyond the range of the average timer 30 metal 0 side walls ‘I and 8 of the heating cham
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depressions I2 are sumciently larger than the a
The .above and other objects of my invention
will becomeapparent from the following specifi-/ " vsupporting coils I3 to assure freedom of contact
cation and from the attacheddrawlngs. ,
I
Referring to the drawingsiwherein like char
acters indicate like parts throughout the sev
, therebetween.
'
'I'he/opposite ends of the heating coil I3 are _
shown as being insulated from side members ‘I
and "8 by porcelain insulators Illa and connected
by wires Ilb and Me to a source of electrical
Fig. 1 is a vertical axial section of my novel
current I5 shown as entering housing I through
' toaster, some parts on ‘the section line being
40 an opening I 6 in verticalvv end member 5.
shown in full;
_ ,
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.
-_ The vertical side members ‘I and 8, as shown, '
Fig. 2 is a transverse horizontal section taken
are provided along their upper edges with cen
on the line 2-2 of Fig. 1;
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Fig. 3 is a transverse vertical section taken sub
‘ trally located substantially U-shaped notches I1 I
eral views:
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35
‘
.which extend. downwardly and‘inwardly into the
45 heating chamber. Member I8 is a ?at strip with
on the section line being shown in full; and
a U-shaped centrally located opening for remov
Fig. 4 is a top plan view of one of the bread
sta'ntially on the line 3-3 of Fig. 1, some parts '
slice rotating devices.
,
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_
Referring more speci?cailyto- the drawings,
numeral I indicates a metallic housing I which,
ing the toast as shown in Fig. 3.
V
Substantially in the center-of perforate bot
tom'lia is a synchronous electric motor IS with
as shown. is made up of vertically disposed rec so suitable self-contained speed reducing gearing.
Motor I 9 is shown as being connected by electric.
tangular side members 2 and 3, narrow rectangu
wires 20 to a source of electrical energy I5.
lar end members 4 and 5, and a perforate bottom
member to. These side members 2 and 8 and
A perforate bailfie 2I situated midway between
end members 4 and i are bent inwardly at their
the top of motor I9 and rounded bottom II of the
upper ends so that their upper edges terminate“ u--toasting;chamber 6a,‘ divides the inside of the
2,410,986
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.
Let us assume that a normal slice of bread A is
now placed into the toasting chamber 6a. The
bottom of the slice of bread A will immediately
come into contact with the opposed rotating re
silient ?ngers 32, one on each side of the slice of
housing into upper and lower compartments X
and Y. A driven shaft 22 extends upwardly from
one side of the electric motor is approximately
midway into one side of the upper compartment or
chamber X. Keyed or otherwise made fast to
shaft 22 at a point midwaybetween the top of
motor I! and the perforate ba?le 2| is a gear 23
bread. These ?ngers 32 being mounted in said
which is in mesh with a similar gear 24 identi
cally situated on the other side of motor l8, im
discs 21 and 28 for radial movement will thus be
compressed or bent inwardly toward their axes of
rotation as they get closer/together.‘ In other
up slightly at 23 to form a bearing for the de
against these vertical walls without actually 'com- -
mediately thereabove. Gear 24 has an upwardly 10 words, they will be spread further apart by the
bread so as not to crush the same. On the other
projecting boss 25 to which the lower end of shaft
hand, in view of the'fact that ?ngers 32 are pre
26 is secured. Shaft 26 extends through a perfora
cluded from lateral movements in slots 30 they
tion in plate 2| upwardly to a distance approxi
will grasp the slice of toast with su?icient grip
mately equal to that of shaft 22. Thus, I have
two laterally spaced shafts 22 and 26, respectively, 15 to assure that the bread is carried along with the
rotation of the ?ngers. In this manner each pair
turning in opposite directionsand located in upper
of successive ?ngers contacts the bread slice in
compartment X one on each side but in the longi
an identical manner and assures constant rotation
tudinal center of the lower end of toasting cham
of the slice A during the toasting operation.
ber 60.
Keyed or otherwise made fast to shaft 22 at a 20 Another important factor is the location of the
-_coils i 3 in the serpentine channels l2. That is,
point immediately above perforate .baifie 2| is a
they are 50 located immediately inwardly of the
boss-equipped metallic disc 21. Similarly situated
plane of the vertical sides 1 and 8 of the heating
on shaft 26 is an identical boss-equipped disc 28.
chamber 6a that the slice ‘of bread A may rub
It will be observed that perforate baille 2i is built
pending boss of disc 28, thus supporting, shaft 26. 25 ing into contact with the coils I 3.
‘ Another important factor is that due to the sub
As shown in Figs. 2 and 4 each'of the discs 21 and
stantially U-shaped slots II in the upper edge of
the heating chamber 60, a portion of the rotating
28 is provided with radially extending slots 36 and
are spaced 90° apart.
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slice of bread A‘ will be in constant view, thus en
abling the operator to remove the slice whenever it
has reached the desired color.
Rigidly secured to the top ends of both shafts 22
and 26 are resilient ?ngers 32, shown as being
made in the form of inverted V-shaped springs.
What I claim is:
As shown, the lower ends of resilient ?ngers 32
project through the radially extending slots 30,
pressing lightly outwardly against their outer
ends.
g
1. In a bread toaster, a casing providing a nar
row toasting chamber adapted to support a slice
of bread in vertical position and having a rounded
35 , .
.
bottom permitting rotation of the bread slice '
By reference particularly to Figs. 1 and 3 it will
thereon, .electrical- heating means within said
be observed that the vertical side members 1 and
toasting chamber, and a power driven rotary im
8 and rounded bottom member I l of the toasting
chamber 6a are notched away at 33 so as to allow 40 polling device positioned to engage a marginal
edge of a bread slice and impart rotary movement
the discs 21 and 28 and the lower portions of re
thereto
on its marginal edge within the toasting
silient ?ngers 32 to enter the bottom of the toast
chamber.
ing. chamber to to an extent, and in a position
2. In a bread toaster, a casing providing a
approximately as shown in Figs. 2 and 3. Also,
curved bottom member ID is provided with two 45 toasting chamber having laterally spaced walls
half round notches for this purpose.
Housing | is shown as being mounted on feet 34,
to raise the bottom in off the surface on which the
toaster rests. Perforations 35 in the bafile 2| and
perforations 36 in the bottom plate in both ven 60
and a rounded bottom, heating ‘means located
adjacent opposite sides of the toasting chamber,
and a laterally spaced pair of radially resilient
impeiling devices, each projecting into the bottom
portion of the toasting chamber and adapted to
engage the marginal edge portion of abread slice
therebetween, said impeiling devices being driven.
in opposite directions.
Operation
3. The structure de?ned in claim 2 in which
When the source of electrical current I5 is 55 the said impeiling devices each comprise a rotary
shaft extending parallel to but extending outside
turned on electric current is simultaneously ap
of the toasting chamber and a circumferentiaily.
plied to connections Mb, [40 and 20 thus heating
spaced plurality of resilient impeiling ?ngers pro
up the electric heating coils l3 recessed in ser
jecting downwardly and outwardly therefrom and
pentine passages l2 on each side of the toasting
chamber 6a. .At the same time electric motor IS 60 said ?ngers being under their own tension to
with suitable self-contained speed reducing gear
move radially outwardly at theirvlower ends, the
radial'distance from the axis to the radial outer
ing starts to run, thus rotating shaft 22. When
portions of said spring ?ngers being greater than
shaft 22 rotates, it also rotates gear 23 in the
the radial distance from said shafts to the toast
same direction. Gear 23 in turn rotates gear 24
in the opposite direction. Shaft 26, secured fast 65 ing chamber, and the walls of said toasting
chamber being provided with openings to receive
to gear 24, is turned in the same direction as gear
said spring ?ngers, whereby under opposite rota
24.
tion of the impeiling devices the said spring-?n
Discs 21 and 28, being secured fast to shafts 22
gers will engage opposite marginal edge portions
and 26, respectively, will also turn in opposite di
rections as will the several resilient ?ngers 32 70 of the bread slice and impart rotation thereto
within the toasting chamber.
which are free for limited radial movement in slots
4. In a bread toaster, a casing providing a ver
30 of the discs 21 and 28. It is important to note,
tically disposed narrow toasting chamber having
however, that resilient ?ngers 32 while free for
tilate the inside of the housing and allow crumbs
from the toast to drop through.
limited radial movement, are held fast in said slots
38 from lateral movements.
a rounded bottom and opening through a slot in
75 the top of the casing, electric heating elements
2,410,9ss
adjacent opposite vertical wallsvof the toasting‘ sides containing heating means, a rounded bot
chamber, laterally spaced rotary impelling de
tom in said chamber adapted to support a slice
vices located at the base of the heating chamber
and spaced apart a distance less than the thick
ness of a slice of bread to be toasted, whereby the
oi’ ‘bread for rotation on its marginal edge, said ,
impelling devices will ensage laterally opposite,
toasting chamber opening upwardly through the
top ‘of the casing, laterally spaced radially yield
ing impelling devices located adiacentthe base.
driving the said impelling devices in», opposite
portion of the toasting chamber and adapted to
engage laterally opposed side portions of a slice
marginal edge portions of a bread slice under
yielding pressure, and power mechanism for
directions.
‘
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5. The structure de?ned in claim 4 in which‘
the said resilient impelling devices are shaped to
provide an upwardly and outwardly diverging
space therebetween within the base portion of the
of bread disposed within the toasting chamber,
cally disposed rigid rotary element carrying a .
radially projecting disc adjacent the plane of the
said impelling devices each comprising a verti
base oi’ the toasting chamber and a circumferen
tially spaced plurality of spring ?ngers anchored
15 to the upper portions 01' said rigid rotary elements
6. The structure de?ned in claim 4 in which
and projecting downwardly and outwardl there
the said resilient impellingdevices are shaped to
toasting chamber.
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- provide an upwardly and outwardly diverging
. space therebetween within the base portion of
from through a radial slot in the disc _ i’ that
impelling device, each spring ?nger bein under
own yielding tension to move ‘against the outer
the toasting chamber, and in which each impel 20 its
end of its slot and the minimum spacing between
ling device comprises a circumierentially spaced “
,. radially opposed spring ?ngers of opposite impel
plurality of yielding ?ngers.
,
7. In a bread toaster, a casing formed to pro
vide a vertically disposed toasting chamber hav-.
ing a rounded bottom adapted to support a bread
ling devices being less than the thickness oi.’ a
normal slice of bread, and means for driving the
impelling device in opposite directions.
9. In a bread‘ toaster, a casing providing a
slice for rotation on its marginal edge, laterally 25
vertically disposed toasting chamber opening
spaced guide elements adapted toreceive a bread
through the‘ top of the casing, an electrical heat- ,
slice therebetween, heating means disposed at
ing element in said toasting chamber, power
opposite side portions of the toasting chamber,
driven impelling apparatus engaging the marginal
and a, laterally spaced pair of rotary impelling
so
edge portion of a slice of breadand imparting
devices disposed adjacent the rounded bottom
rotary movements thereto, and notches in oppo
portion of the toasting chamber, said rotary im
site side walls of the casing extending down
pelling devices being disposed on parallel'vertical
wardly
from the top thereof to permit inspection
axes and each thereof having downwardly and
of the rotating bread slice during the toasting
outwardly diverging impelling surfaces forming 85 process
and removal thereof when toasted. >
an upwardly converging space between the impel
10.
The
structure de?ned in claim 9 in i'urther
ling surfaces of opposite impelling devices, the .
combination with electrical heating elements dis-'
minimum spacing between impelling surfaces and
posed at opposite sides of'the toasting chamber.
opposite impelling devices being less than'the'
11. The structure de?ned in claim 9 in further
thickness of a normal slice of bread and said im 40
combination
with electrical heating elements dis
pelling devices being radially resilient, and means
posed at opposite sides of the toasting chamber,
driving the impelling devices in opposite direc
said heating elements being or the resistance
tions, whereby a slice 01' bread disposed within
type and being disposed in inwardly opening
the toasting chamber will be engaged between
channel-like recesses in the side walls 'of the
opposite resilient impelling devices adjacent the
laterally spaced sides of its marginal edge por 45 toasting chamber whereby the bread slice may
tion and rotated on its in rginal edge within the . gengage and be guided by the walls 01' the toasting
toasting chamber.
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8. In a bread toaster, a casing providing a
toasting chamber having laterally spaced vertical so
chamber
without directly contacting* said heating
e emen s.
oscaa v. mmqurs'r.
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