вход по аккаунту


Патент USA US2408264

код для вставки
Sept. 24, 1946.
2. Sheets-Sheet l
Filed-June 24, 1946 '
V110 ?agga/ri/si
Sept. 24, 1946.
2,408,263 '
_ Filed Juné 24, 1946 _
2 Sheets-Sheet? ~
r Patented Sept. 24, 1946
' Vito Mazzarisi, Clifton, NUT. ‘
I _ Application June 24, 1946, Serial No. 678,777
I V 9 Claims} gciesfsss)
This invention relates to new and useful im
provements in toasters.
the door.
Fig. 4 isv an enlarged side view of part of a
In conventional toasters of the slice-reversing
door type a slice of bread, inside the closed toaster
door, is exposed to a heating element. When
sufiiciently toasted the door is opened whereupon
the bread slice, sliding down the incline of the
open door, is reversed so that the untoasted side
is on top, ready for-toasting when again closing
shown in Fig. '2 viewed from the plane III-III
toaster construction in accordance with the in
vention showing various positions of a spring ele
. ment in relation to various positions of the door;
Figs; 5, 6 and '7 respectively represent enlarged
side, frontand top views of a double spring ele
10 ment in accordance with a preferred embodiment
It is necessary in'toasters of , this type that
of the invention.
As illustrated in the drawings, l represents the
the door, when in the “closed” position; is at a '
base of a toaster with the .toaster housing com
relatively large angle of incline" with respect to
the vertical. Without such angle of incline the
door would not remain sufficiently closed. Alter
natively, it is not practical to apply conventional
spring means, inter alia, because of the are
through which‘ any point of the pivoted door,
whether below or above the pivot, has to travel.
prising sides 2 and top 3 secured thereto. Doors
5 :are pivotally mounted on pivots 4 carried by
sides 2. The pivots are preferably stamped or
cut as an integral part of the housing. Doors 5
carry handle portions 6 and are pivoted inter
mediate their ends so that end 5(a), \below the
pivot, is relatively short. Doors 5 carry at their
The incline of the door of conventional toasters
of the slice-reversing door type needs to be ‘such
that the weight of the door at the incline will
keep the same closed. This has necessitated a
lower ends lugs 1 preferably as an integral part
thereof.‘ Lugs ‘I carry pivot bearing-apertures 8
and spring bearing-apertures 9. Double spring
[0 comprises coiled spring element I00, secured
to base I by stud l5, and individual arcuate spring
elements llla and [012, having at their ends bent
triangularly shaped toaster unsightly and ungain
ly in appearance. Furthermore, the heating ele
ments are normally vertically arranged in a
toaster of this type so that with the slanting
angle of the toaster doors the. toast slices are
exposed to the heating element'at unequal dis
tances, i.v e., they are closer to the heating element
or hookedportions I la and MD, respectively car
ried in apertures 9 and 9a of doors 5. Each door
carries across its base a trip bar l2 upon which
a slice of bread rests when the door is closed and
which serves to trip the same so as to slide down
the downwardly inclined door with the untoasted
face up when the door is opened. Instead of a,
double spring serving two doors, an individual
separate spring (Fig. 4) for each door may be
at the top than they are at the bottom of the
slice. In this manner, the bread slice is thus
unevenly toasted and in many cases satisfactory
toasting of the base of the toast will resultin a .
scorching of the top portion thereof.
One object of the invention comprises inter
I Speci?cally referring to Fig. 4, 5 represents
stantially vertical slice-reversing door.
the toaster door (parts broken away), 8 the pivot
bearing-aperture, 9 the spring bearing-aperture,
I the toaster base (parts broken away), Ind the
coiled spring element and [3 the arcuate spring.
Broken outlines 5a, 5b, 5c and 5d respectively
The foregoing and still further objects of the
invention will appear from the followingdescrip-p
tion read in conjunction with the drawings illus
trating a preferred embodiment of the invention
with 5d the fully opened slightly downwardly in
clined door-position at which the bread slice has
been reversed. .Broken outlines I3a,~ I31), I30 and
in which:
shapes of the arcuate spring at these various
alia a toaster having at least one spring actuated
slice-reversing door.
' Another object of the invention comprises a 40
toaster having 'at least one spring actuated sub
indicate various positions of the opening door, '
l3d respectively, represent the positions and
Fig. 1 represents a perspective view of a slice
reversing door type toaster constructed in ac
cordance with the invention;
Fig. 2 is a side view with parts broken away
of a toaster construction in accordance with the
invention and having one of the slice-reversing
doors partly opened;
Fig. 3 is a top View of part of the construction,
door positions; 9a, 9b, 9c and 9d’ indicate the‘
respective relative positions of the spring bear
ing-aperture. The dotted spring outline l3e-in
dicates the position and shape of the spring ele
ment with the end facing the door in unattached
' position.
The solid outlines show door 5 in closed
position and the arcuate spring l3turnably fas
tened with one end to the door at 9. The other
end of spring 13 is suitably mounted, such as on
base I at is by way of the coiled spring element
10d. In the preferred construction the spring
securing point I4 is substantially on a line
through the axis of pivot of the door, and ex
tending at an angle with the horizontal through
between spring ends is substantially the same
as the distance between ends of the spring in
the position i3. Point 8a thus represents the
hall-way mark of the securing point of the
spring to the door between the closed position
of the door and the partly open position 50. In
the door position 50 therefore the lateral spring
_ said axis of not exceeding 60° and preferably be
force between ends of the spring is about the
tween 20° and 60°.
samev as it is in the original, closed position 5 of
Attaching the spring (I36) to door 5, when 10 the door; this force, however, in this case is
the latter is in closed position, involves charg
exerted substantially in an upward, door opening
ing the spring, i. e., de?ecting it into the posi
direction. The deflection of the base secured
tion shown by‘the solid outline l3. In this posi
arm of the spring in position I30 is such’ and the
tion the door attached spring arm extends at its
deflection opposing spring force in this position
securing point at an angle of less than. 90? and
so selected that the increased spring resistance
preferably less than substantially 6G°to the ver
against which the arm has moved causes the
tical X-Y on the axis of pivot of the door
major component of the spring force to be ex
through the door securing point 9. A minimum
erted at so in the direction of the door secured
spring arm angle to the vertical X-—Y of at
spring arm portion, thus resulting in a predomi
least 10° is of advantage. The spring exerts at - nant downwardly directed spring force, i. e., sub
9a ?rst force A (Fig. 4) in the direction of the
stantially in the direction of the arc of travel of
spring arm and a second force B substantially at
the spring securing points of the door towards
right angles to the ?rst, thus e?ecting a result
its closing position.
ant force C acting to keep door 5 in closed posi
The laterally exerted spring force at 9 and 9c
tion. As the door is opened and assumes for
relatively small. This spring force at 9 is
instance position 5a, the point of spring attach
preferably in such‘ relative balance with the
ment moves to 9a and the spring itself assumes
spring force in the direction of the door attached
the position and shape 53a. Point 9a is sub
spring arm that it re?ects a resultant acting in
stantially in direct line between door pivot point
a direction to keep the door e?ectively closed.
8 and point Ilia on coil i?d. In this position of 30 Between spring securing points 9 and 9c the
the door, the spring is at about maximum lateral
lateral spring force is at least partly absorbed
depression between spring ends, and assumes a
by the ?xed pivot 3. The closer the door se
position approximately tangential to the arc of
curing point of’ the spring gets to‘ the line 8_Ma,
travel of the spring securing points around the
the greater is the absorption of this force with
axis of pivot of the door between closing and
substantially a maximum at ca. Though this
maximum opening position of the latter. At the
absorption. of the lateral spring force decreases
between so and $0, the lateral spring force it
same timefrom
the spring
the Original
arm lt’f
of spring
l3 against
self decreases by the de-compression of the
the spring force of coiled. spring element lild.
spring and the arm directional spring force in
Thus, moving of the door from position 5 to po its. creasingly outbalances the lateral spring force
sition 5a results in a compound spring action in
to such extent that the latter for practical con
which a lateral charging by depression, of the
siderations ceases to materially affect the former.
spring between ends is obtained and in which
When further opening the door to, for instance,
further a charging in the direction of the door
the position ‘5d, which is at a slight downward
attached spring arm is achieved by the lifting 1'.1. C1 incline, and at which a slice of bread on the inside
of the latter from point 9 to point 9a and the
of the door would have become reversed, the
resultant de?ection, against spring resistance, of
securing point of the spring to the door is at
the other spring arm
ed. At this point the spring assumes the shape
Fur-ther opening the door to for instance posi
and position 13d. The distance between spring
tion ‘52), the spring securing point is at 91) and 50 ends of the spring in position [3d is greater than
the spring itself assumes the position and shape
the distance between spring ends of the charged
I31). In this position the spring element I3!) is
spring in position is and equals approximately
still laterally charged with respect to its original
the distance between spring ends of the un
position 13 but to a somewhat lesser extent than
charged spring in position I36. Thus at 90’. there
at its position [3a. The lifting of the spring 55 is substantially no lateral thrust of the spring,
securing point from 9a to 91), however, has re
though there is an increased arm directional
sulted in a further charging in the direction of
thrust of the spring by reason of the further de
the door attached spring arm by additional de
iiection of. the base mounted spring arm, against
?ection against spring resistance of the arm at
spring resistance of coiled spring, element l?d.
the other end of the spring. The door secured 60 the
This arm directional thrust'of the spring at 9d
spring arm is still relatively close to tangential
is, however, substantially in a direction at a, rela
with respect to the arc of travel of the spring
tively small angle to the line B-Qd. Conse
securing points of the door when opening or
quently only a relatively small proportion of this
closing the same. Thus, in the position 5b of the
thrust is e?ectively exerted, i. e., substantially in
door the direction of. one component of the
the direction of the door-closing arc of travel of
spring force is still approximately vertical to the
the spring securing points on the door around
spring arm at its point of attachment to the door
pivot 8. The more closely the arm directional
but the predominating spring force at that point
thrust approximates tangential direction, the less
is downwardly and substantially in the direction
is the loss in thrust force through pivot absorp
of the arc of travel of‘ the spring securing points. 7
tion. Conversely, the more closely the arm direc
When further opening the door 5 to, for in
tional thrust approximates the line between door
stance, the position 5c, the door securing point
pivot and spring securing point (to the door) the
of the spring is located at 90 and the shape and
higher is the loss of thrust form through pivot
form of the. spring element are shown by the
broken outline I30. In this position the distance
The spring force, particularly that against
. at the door securing point at .an angle of sub
which the base securedv arm of the springiis'de
'?ectibl'e, must be appropriately proportioned to.
--such.factors .as theweight of? the door, varying
‘distance (with opening or closing’ of door) vof
“stantially between 10° and 60° to the vertical
. on the axis of door pivot through the doorsecur
ing point; the arcuate spring has preferably sub
,stantially straight line directional end portions
- pivot pointfrom' either end of door, in accord Oi ‘definingits two arms and is. preferably so shaped
ance with well known principles of physics and
that, thetdoor secured spring arm is substantially
Jengineering. ‘When the door is in the closed posi
T tion, it is almost vertical with its masspredomh
*nantly ‘in substantially .‘vertical alignment with‘
the pivot ‘point; . onlyiai relatively small spring
. tangential ati thedoor securing point to the circle
(partially indicated in the drawings by for ex
broken, vcurvedline R) through said point .
' around. the substantially ?xed mountinglpoint of
force is required to maintain" the ‘door in a ‘closed
'_ v
.ctherspr-ing. Best results are obtained when ,the
5 position. This may be. supplied by a substantially
i'doori securing ,point is positioned, with' the door
slateral thrusting spring'force or within the pre
closed, below’ and slightly forward of the axis of
-~ferred embodiment of theinvention bythe vre
pivot ofthe 'doorandwiththe springv mounting
~sultantfofi a laterally and arm directionally‘ act-1
.point; . substantially _. positioned ' below, the; door
'Jing spring. force; ‘As'the' door is‘ opened, the
:securingpoint on the vertical to the axis of pivot
5: gravitational force exerted thereon increases with “of the door substantially extending at an angle
.' I‘ the a distance! of :the - door“ top
Iiwith'the horizontalon said axis of not exceeding
.through the‘ pivot point; ' The spring 'force
substantially 60° and preferably between 20° and.
against. which ‘the de?ecting spring arm moves 20
can ‘then be ‘calculated in a well known manner
Thus in the practical applicationv of the yin
.7 and can be predetermined? empirically for any
vention a. toaster with
given construction. In-a‘practical application,
be constructed. The
door? is only under relatively slight spring ten
door position 5b (Figs) could be selected,'for
instance, vas the one at which the. spring‘ force
lof the coiledrspringielement lOdis to be calcu
lated. in well known manner to balance the gravi
' 25
tational forces exerted upon the door with re
spect'to the 'pivot. The door in the position 51)
-~ would then be in spring-balance'and when placed 30
in that positionwould remain substantially sus
‘- pended-without moving either upward or" down
substantially ,- vertical "
' slice-reversing doors may
vvsion sufficient to, maintain the. same satisfac
torily closed by wayof a spring ‘thrust com
prising theresultant of a substantially lateral
spring force through spring compression and
a. substantially .arm directional spring ‘force
.through angularude?ection against spring re
sistance .of the spring arm.v As the. door is
' opened, the lateral spring force ‘component de
~ , creases in its action on
I Broadly speaking‘, the .i-invention comprises ‘in
the/door by reason of
the fact that its thrust is- increasingly directed a
1'- combination with at least one slice-reversing door
towards th‘evpivot until about maximum compres
‘l of a‘ toaster {of the ‘aforementioned type; spring
sion, at which point it is substantially completely
imeans having at least one arm secured‘to said
absorbed. The spring force componentracting
door. at a securingipoint- positioned, with the
1 by way of spring arm de?ection against spring
{door closed,‘ below the axis of pivot‘of said door,
resistance becomes increasingly greater by reason
7 said arm' substantially extending at said secur 40 not only of the increased de?ection of the spring
ing point at an angle of less than 90° andprefer
arm but also by reason of the greater approxi
ably less than 60°- to theivertical'on "said axis
mation of‘ its thrust in directions substantially
~' through said securing point, said arm' being
' tangential to the arc ‘of travel ofthe spring se
mounted for substantially‘ arm directional lift
ing against‘ spring resistance» and for substan
curing point around the door pivot. This double
tially lateral de?ection against spring resistance ‘
throughout at least-part of the arc of travel of
said securing point around said axis when open
~~ing said door. The arm is preferably mounted ,
lat said securing point to' be substantially later
rally de?ectible to positions approximating sub
stantially tangential direction to said' ‘are, of
travel; 1 The arm maybe ‘secured to‘ the door
when in the closed position without spring ten
sion though in a position to‘ cause any opening
action :increase- ' in . spring thrust against the
openingfof the door aids inbalancing the grav
tational force acting on the door, which increases
‘with the distance of the door top from the verti
cal over the ‘pivot; By reason of this double
'action, furthermore, either a weaker spring re
sistance for de?ection may be chosen than would
be otherwise possible to balance the same open
“ing distance of the door from the closed posi
1 tion, or alternatively it is possible with a given
spring resistance against de?ection to achieve a
greater opening distance of the door than would
be otherwise feasible. Depending upon the de
7 of the door to be against spring resistance. It is
preferred, however, to mount the’ arm at said
securing point. with a spring force exerted in
substantialy door closing direction.
?ection resistance selected, as well as upondoor
weight, height, and such other factors as may
As=is evident fromv the drawings, the preferred 60 affect the gravitational forces exerted upon the
embodiment of the invention ‘comprises in com
1. opening door, a point in the opening of the door
bination withvaytoaster door of the type men
will be reached at which‘ the forces are in ap
tioned, spring means and preferablyan arcuate '
proximate balance and beyond which the weight
spring having at least one first-arm, of the afore
of the door at the distance of its top from the
~ mentioned'typev and characteristics, mounted and 65 vertical over the pivot will outbalance the de?ec
:securedtc said door as aforestated, and at least
one second arm mounted forapproximately an
gular de?ection against‘spring resistance by the
tion'resistance of the spring arm, thus’ causing
, ‘the door to 'move downwardly by its own weight
v‘but still cushioned by the spring thrust of the
- lifting of said‘ ?rst arm and preferably'for suchv
arm as it is furth'er de?ected against spring
deflectionv at ‘a point substantially below the door 70
securing point.
' TPiIThe' preferred spring in accordance with the
invention is an arcuate spring, so shaped that
when secured toth'e-door, preferably under ten
_ ~
Though within
the preferred
embodiment ofv
'my invention I ?nd it of advantage to secure the
arm portion mounted for de?ection against
spring resistance at a pointbelowY thespring
Lsio‘n, its door secured ‘arm substantially ‘extends.
t 7
~se‘curingipoint'of the!springtothedoor,litizispos- "
'1-3.1£In:toasters of thee typezhaving ‘at leasti'ione
'~ ‘s'ible‘lto raisei thesecuring'pointl of] the‘ deflecting
1: sli'ceereversing door i-pivotable -:int-ermediate .:its
" a‘rm'eto" above’ the'ldoorl securing: pointland. ‘even
‘ ends; the "improvement-which :comprisesgin com
‘ '
with‘rqatdeastzonecsuchidoorwofz such
T‘Wi-thinf-the-lscope-J of: lily-‘invention onersingle . 5 mtoasteraat least :one arcuate-zspring,:.springuten
~s1oring1element~unitafor~each-ldo'orlmay' beiused.
? sicnicompressible;b’etween' ends: and‘ de?ningwith
Alternatively; and; this. construCtionisi preferred,
--its->tend =portions- at; least one .?rst' and :one second
- Ié'l?nditjtj.bfliadvantagel‘(10311563 a‘ double .spring .
v-arme'respectively, :“said‘ ?rst; armv being ‘secured
~>elernent1as,_;.for instance’.illustrated infFigs. 2,
-substantiallyiatriitstend tosaidvdoor at-a door
. 3,;5; sands, 1111511011,:caseeheaooiled spring ele- 10-*sricuringpoint,positioned, with:the:door:.closed,
kmentfl?cA-Jserves both gfLth'e individua} spring
*belowiiand?forward;of the axis of. pivot :of: said
» ‘elements
lowland 1' ililb. as 1. a Jspring resistance
:doonrsaidrs?rst 1 arm“: substantially ' ‘eXtending': at
Lag-angst their de?ection, zAsl .i11ustrated :in Fig. 7
isaidr-d'oor.securingrpointzin‘ said position with‘: an
--'-it=-isiloften expedient .toI-somewhat bendthe arms ,
aarmddirectionalivspfing thrust’ and‘ in a 'down
ljj?wai'dly .50’. as: to-c1earstheitrip:;bar and at .the. l5-wardlyzdirection atianianglef of substantiallybe
‘lisameatime'abringf;tnelarm endszinto substantial
tween .'>10°'~1and~60° to the Vertical: 011 said axis
; aljgnmentwith each other. .Although‘onespring
Pthreughe'said-door securing, vpoint, saidrsecond
‘ fforieachtside otieach dooriorla double ‘spring for
{arm-"being- cie?ectibly -~mounted"substantiallywat
ieachfside-‘of .eachnpair ‘of doors .may be used, I
-:its 1; end :wat. a ~‘substantially.==stationaryi;spring
FP?nd-it su?icien't‘ top'rovideeonly one side of each. gof'imOunting; pcintasubstantialiy . positioned below
door with a suitable spring element in accordance
"Said? doohsecuring Point" on the'vertical to said
" with the invention.
\ axis-rot pivot and substantially v‘extendingv at: an
"The foregoing ‘speci?ofdescription is forrpur-
anglerwith :thehorizontal on'vsaid ,axiswof "sub
'lposeslof illustrationlandnot fofvlimitationzandlt
' stantially fr?m ‘29°t’t0'50°; and spring. means 'for
is therefore myfintentionithat; thei'inventionsbe 25 ‘resisting,thezde?ection .of said second arm-"Said
~1im-ited1 only by. the‘ appended claims .. or their
.varcuatefspring being tension-compressed between
equivalent wherein I have "endeavored: torclaim
when said door is substantially closed.
‘broadly. an: inherent novelty.
I Iclaim:
~<€~.1~‘In toasterslofzthe type havingat least‘ ‘one
"sliceer'e-versing ‘dOOI‘jDiVOt'abIQ intermediate its
. 1. Inutoastersxof the 'typei'havingfat least. one go-ends; the‘ improvement whichmomprises; 'inz'com
~sliceareversingzdoor .xpivotable:Jintermediate:rits
_bination with’ at’ least- one such .‘dOOl‘ of " such
. ends; the improvement which- comprises, .in ‘com. toaster,~. at»v least one:.arcuate_-spring, (spring ten
' ~binati'onlvwith at cleast'rone = such ‘door of‘ such"
sion compressible between ends and ‘de?ning with
.;toaster;;springrmeans having-at least: one arm
~it5~en¢1 portionsiratzleast»one ?rst: and one second
.JIateraIlyIde?ectabIe againstispring' resistance se- 35- arm respectively; said'r?rst'iarm being secured
curedito saidido'onat a ‘securingipoint'positioned,
substantially-at its end ‘to said 'door,":at a'door
'sfwithifthexdoorqrclosed, IbiilOWL'the?Xlslfof pivot of
rsecuringipeint positioned,’ with ¢theido0r closed,
:saids:doorgisaidnarm’s substantially extendingrat
“ below'theiaxispf pivoto-f-said door, said ?rst
rsaid L securing ip'oint with :.:an ‘arm ldirectional
, arm substantially extending at said doorsecuring
rispringithrust: and lin'.a..downwardlyidirection' at gunpoint with :an-arin: directional spring thrust and
ran: angle of less'zthan" 9 “Ltoithe verticalton :said
-in'r awd'ownwardlyidirection: at- an angle‘ ofwless
~ axiscthronghrsaidsecuring.point; said‘ arm being
than-90° tothe- vertical on said aXis through said
Wmounted" for‘ substantially’ arm: directional ilift-
< door securing 1 point ‘ for substantially arm 1 direc
-ing“ against'lspring resistance and .for» substantially. lateral. de?ection against-spring resistance
uthroughout at least partof the» arc ofrtravel of
..?onalrlittingrthroughoutiat-least part of the arc
ofi-travelof- said, door-securingrpoint- around said
aaxis,~iwhen 'openingi-said door; and a resistance
‘said securing'point around said. axis when‘ open-
'1 spring-coil carried at andas axsubstantially, in
ing said- door.
. 2. In toastersv of the typehaving at least one
tegraleextensionwf therend -:of :said second7 .arm
and mounted-at a.substantially'station'ary mount
~-S1‘iCe'-i'eVe!‘Sing C1001‘ Divotabie intermediate its 5O..-ing~point=substantially~positioned below said door
_ends-, the improvement which comprises, in-ecom-
. seouringqaoint; said @second arm being de?ectible
~.bination ' with at least one 'such : doc-r of I siich
v:twgainstrtloe springresistance'of said coilupon the
..toaster,~at least-one arcuate spring-de?ningiwith
itsend portions atleast one?rst-and- one second
.~liitingiotsaid?rstvarm and said arcuatejspring
..being~:tension-compressedIwhen saiddoor issub
arm respectively; said ?rstiarm 1 being secured 55-.»1stantial1yv'c1osed.
esubstantially at'its end to said door; at a ‘door
iisecuri-ngppoint‘ positioned, with the door closed,
v‘5. The.; with'claim
:‘ldnwhichsaid?rst.armextends at an'angle not
.ibelowthee axis-of pivot, ofgaid?dOOr, saidl?rst
exceeding substantially 60°:and, in ‘which said
=arm~ substantially: extending at-saidtdoorisecurarcuate spring has->S111bStaI-1tia11yrstraight‘liné di
ii-ng point with an‘arm'-directional;:spring:thrust sonrectional :end portions de?ningisaid ?rst and sec
r and in'a' downwardly direction“ at'uanv angle of
. 0nd. arms respectively.
“less than 909 to theverticalon-said axis through
~said door securing -point,-~¢saidsecond/arm’ being
"mounted substantially at its 'end "at a vmounting
. -~6. Thesimprovement in accordaneewith claim
1 4-in-whichvsaidr?rstwarm-extends at an- angle not
exceeding’.substantially 60°, in which said arcuate
point substantially positioned below said door se- 65 springihas substantiallyrstraight line' directional
‘- curing. point; said spring vbeing‘jspring-tension
"compressible "betweenwsaid' arms- and‘ mounted
rend portionsrde?ningisaid ?rst andisecond arms
, point is
for substantially arm directional'lifting of said
.ionthe- vertical to said¢aXis'of»'pi-vot1substantially
; ?rst arm at saididoorrsecuring-point throughout
-‘extendinggatlanvanglelwith-the' horizontal :on :said
' attrleast the?rst 'part of the‘ arc of travel of said 7()~-&XiS:>-of notexeeeding substantially :60“.
door securing point around said axis, when-lopen-
'7. In toasters of the type having'fat “leasttwo
'ingisaid door, and for deflection of saidsecond
:arm, actuated by the lifting-of-said1?rst=arm,
and spring'me'ans for resisting said de?ection of
—slice-*reversi-ng:'doors substantially‘Jim-opposing
a-po-sitions on ieithereside thereof, the improvement
..wiiicheeemprisesiin- combination iwith-wany two
_ “said second arm.
~ :75: such doors o?such toaster a: doublegspringrhaving
to one of said doors and at least one second arcu
ate spring element secured to the other of said
to one of said doors'and at least one second arcu
ate spring element secured to the other of said
doors, each said arcuate spring elements com
prising at least one arcuaterspring, spring ten
doors, each said arcuate spring elements com
prising at least one arcuate spring, spring ten
sion compressible between ends and de?ning with
its end portions at least one ?rst and, one second
arm respectively, said ?rst arm being secured
substantially at its end to its door at a door se
curing point positioned, with thedoor closed, sub
sion compressible between ends and de?ning with
its substantially straight end portions at least’
one ?rst and one second arm respectively, said
10 ?rst arm being'secured substantially at its end
stantially below the axis of pivot of said door,
each said ?rst arm substantially extending at
its door securing point with an arm directional
spring thrust and in a downwardly direction at
an angle of less than substantially 90?’ to the ver
tical on the axis of pivot through its-door secur
ing point for substantially arm directional lifting
throughout at least part of the arc of travel of
its door securing point around the axisrof pivot
when opening its door, and a resistance spring ,
coil common to both second arms of said double
spring and ‘carried at and as a substantially in
tegral extension of the ends of each second arm
thereby connecting the same to form said double
such doors of such toaster a double spring having
at least one ?rst arcuate spring element secured
at least one ?rst arcuate spring element secured
to its door at a door securing point positioned,
with the door closed, below and forward of the
, axisof pivot of its door, said ?rst arm substan
tially extending at its door securing point in said
position with an arm directional spring thrust
and in a downwardly direction at an angle of
substantially not exceeding 60° to the vertical on
said axis through said door securing point, said
second arm being de?ectibly mounted substan
tially at its end at a substantially stationary
spring mounting point positioned’ substantially
below its door securing point on the vertical to
said axis of pivot substantially extending at an
angle with the horizontal of substantially not
spring as a substantially single unit, said spring 25 exceeding 60° and spring means, :common to the
vsecond arms of both said arcuate springs, for '
coil being mounted at a substantially stationary
I mounting point substantially positiongd'below
resisting the angular, de?ection of each said sec
each of the door securing points, each second arm ~ ~ ond arm, each of said arcuate springs being ten
being de?ectible against the spring resistance of
sion-compressed when its door is substantially
said coil upon the lifting of its ?rst arm and‘ each 30 closed.
9. The improvement in accordance with claim
arcuate spring being tension-compressed with re- '
8 in which said spring means comprise a coiled
spect to its door when the latter is substantially
resistancespring carried as a substantially inte
gral part of, said double spring between second
8. In toasters of the type having at least two
slice-reversing doors substantially in opposing 35 arm ends.
positions on either side thereof, the improvement
which comprises in combination with any two
Без категории
Размер файла
939 Кб
Пожаловаться на содержимое документа