CA1070200A - Shuttered oven-door window - Google Patents
Shuttered oven-door windowInfo
- Publication number
- CA1070200A CA1070200A CA041,753A CA41753A CA1070200A CA 1070200 A CA1070200 A CA 1070200A CA 41753 A CA41753 A CA 41753A CA 1070200 A CA1070200 A CA 1070200A
- Authority
- CA
- Canada
- Prior art keywords
- door
- window
- louvers
- oven
- operable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/02—Doors specially adapted for stoves or ranges
- F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Baking, Grill, Roasting (AREA)
Abstract
A B S T R A C T
A range oven door for self-cleaning ovens has a shuttered assembly for the oven door window. The shuttered assembly in the door is operable between open and closed positions in the window opening. Means connects the shuttered assembly to a latch for the oven door which operates the shuttered assembly between closed and open positions.
A range oven door for self-cleaning ovens has a shuttered assembly for the oven door window. The shuttered assembly in the door is operable between open and closed positions in the window opening. Means connects the shuttered assembly to a latch for the oven door which operates the shuttered assembly between closed and open positions.
Description
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The present invention relates to shutter means for closing or obstructing the window which is normally found in tne oven doors of domestic cooXing appliances.
For many years, the cook stove manufacturing industry h~s provided its oven doors with windows through which the housewife may observe t~e cooXing process which is being carried on within the oven without the necessity of opening ~he oven door as was previously required.
More recently~ the cook stove manufacturing industry ~ -~
has developed various forms of an oven which may be heated to ~;
a ~elatively high temperature or the purpose of cleaning food soil from the interior oven walls by pyrolysis. The tempera-tures which are involved in the pyrolitic cleaning action are substantially higher than those which are encountered in normal cooking operations. ~ormal cooking temperatures do ;~
not, as a rule, exceed 500F to S50F w~ereas the pyrolitic cleaning action takes place somewhere between 800F and aoooF. l :
Initially, it was believed that it would be necessary to sacrifice the presence of a window in the oven door in 1~ order to achieve the obvious advantages o~ the "self-cleaning"
i~ ~eature and the attendant high temperatures. The reason for this is that the conventional double-pane window design of the prior art is not capable of confining the increased amount of heat energy to the oven cavity and, accordingly, the heat los~ through the window was excessive and radiation through the window presented a hazard to the housewie.
. , ~
The present invention relates to shutter means for closing or obstructing the window which is normally found in tne oven doors of domestic cooXing appliances.
For many years, the cook stove manufacturing industry h~s provided its oven doors with windows through which the housewife may observe t~e cooXing process which is being carried on within the oven without the necessity of opening ~he oven door as was previously required.
More recently~ the cook stove manufacturing industry ~ -~
has developed various forms of an oven which may be heated to ~;
a ~elatively high temperature or the purpose of cleaning food soil from the interior oven walls by pyrolysis. The tempera-tures which are involved in the pyrolitic cleaning action are substantially higher than those which are encountered in normal cooking operations. ~ormal cooking temperatures do ;~
not, as a rule, exceed 500F to S50F w~ereas the pyrolitic cleaning action takes place somewhere between 800F and aoooF. l :
Initially, it was believed that it would be necessary to sacrifice the presence of a window in the oven door in 1~ order to achieve the obvious advantages o~ the "self-cleaning"
i~ ~eature and the attendant high temperatures. The reason for this is that the conventional double-pane window design of the prior art is not capable of confining the increased amount of heat energy to the oven cavity and, accordingly, the heat los~ through the window was excessive and radiation through the window presented a hazard to the housewie.
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The presen~ invention, however, makes it possible to retain the advantages of a window in the oven door while, at the same time, providing simple and automatic means whereby, during the high temperature self-cleaning cycle, the window may be obstructed so as to retain the high temperature within the oven and to prevent both exces.sive heat loss and radiation through the window. -According to the present invention, in one embodiment, an oven door window is provided with a peripheral frame within which are mounted a plurality of spaced, parallel~ substan-tially flat blades, rotatable about their longitudinal axes from a first position in which the flat blades are parallel to one another and normal to the plane containing the window ,.j , ~
I so that the interior of the oven may be viewed between the blades, to a second position wherein the blades are rotated ~ through substantially 90 so as to lie in substantially a "'' ;:~
single plane parallel to the plane of the window whereby the window is completely obstructed and closed by the blades, , ~ . .
operating means being provided to simultaneously move all of the blades as a result of a door locking function which is a preced~nt to the initiation to the self-cleaning cycle.
A preferred embodiment of the invention will now be disclosed in detail with reference to the accompanying ; drawings in which like parts are denoted by like reference numerals in the various views and in which:
Figure 1 is a perspective view, partly cut away and exploded in order to sho~ an oven door embodying a shuttered , ~ , ,: - 3 ~
, , ^ .. . . . . .. .
window constructed and arranged in accoxdance wi~h the present invention;
Figure 2 is a section view taken along line 2-2 of an assembled door as illustrated in Figure l;
Figure 3 is a fragmentary detailed view of a portion o~
; the shutter actuating mechanism illustrated in Figure l;
~ igure 4 is a fragmentary detailed view showing the components o~ Figure 3 assembled and in a different position and Figure 5 is a fragmentary view showing a portion of the shutter actuating element.
Turning now to Figures 1 and 2, an oven door embodying the shuttered window of the present invention is illustrated.
In Figure 1, the door may be seen to comprise an inner shell 10 having flanged edges which will engage with an outer shell 11. Convenien~ly, the outer shell 11 is provided with flanged edges, the lower such edge being provided with tabs 12 which may be inserted in slots 13 in the corresponding edge of the ~:
, ~, . .
inner shell 10 to secure the two shells together along the lower edge. The upper edges may then be secured together by means of screws such as 14 received in corner brackets 15 carried by the upper corners o~ the outer shell 11 o~ the door. `
As seen in Figure 2, the inner shell 19 is also pro-vided with a rearwardly extending sheet metal plug or box-like portion 16 w~ich is of a size such that it will fit relatively snugly within the opaning to the oven. The oven ~ ; `
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opening is indicated in dotted lines in Figure 2 by the oven upper wall 17 and the oven bottom wall 18.
The plug or box-like member 16 is secured to the rear-ward face o~ the inner shell 10 by brackets 16a and is pro-; viaed with a heat resistant, compressible se~l member 19 so that the oven door, when in its closed position, will tightly close the oven opening with the box-like section 16 extending slightly into the oven cavity.
The rear ~ace of the plug 16 i5 provided with an aperture defined by a peripheral flange 20~ the flange 20 receiving a sheet of heat resistant glass 21 such as that sold under the trade mark "PYREX".
The outer shell 11 o~ the door is also provided with an opening defined by an inwardly extending peripheral flange 22, this ~lange engaging the rim 23 o~ a frame 24 which mounts a pair of spaced, parallel panes of glass in a self-contained unit which is of conventional construction.
~, . . .
The plug or box~like section, interiorly of the glass pane 21 presents a recess aligned with the three panes of glass constitutiny the window in the door within which the shutter mechanism is mounted.
In Figure 1, the shutter mechanism will be seen to comprise a channel-section frame 25 which defines a rectangu-lar opening substantial~ly co-extensive with the size of the panes of glass constituting the window. The ~rame 25 com-prises side members 26 and 27 and a bottom me~ber 28 and a top member 29. The frame-is secured in,position by means of -brackets 30 which may be spot welded to tha inner surface of the plug or box-like member 16. Angular brackets 31 are then secured to the brackets 30 by means of screws so that one free end may bear upon one flange of the channel-section : ~
frame member and retain it in position. As seen in Figure 2, . .-.. the frame members (only 28 and 29 o~ which are shown) serve ~:
also to retain the pane of glass 21 within the flange 20.
Bottom and top frame members 28 and 29 are provided with .~ a plurality of spaced and aligned apertures 32 and 45 by means 10 of which the spaced, parallel, substantially flat blades 33 .
may be mounted as shown in Figure 1. The blades are capable .
of rotating through 90 from a irst position as sh~wn in Figure 1, in which they are parallel to one another and normal .~ to the panes of glass so that a housewife may see through the . :
window to a position in which the flat blades 33 are substan~
: tially co-planar and parallel to the panes of glass as shown, in a fragmentary view, in Figure 3. ~.
Turning now to Figures 3 and 4, each of the blades is formed from a length of extrusion, conveniently of aluminum, defined by a central rib portion 34 from which extends, on both sides, the blade portion 35 and 36. One of the blade portions 36 is provided with an off-set segment 37 along its edge 50 that, as seen in Figure 3, the end of blade portion 35 may lie within the off-set portion 3~ of an adjacent -blade, thereby enabling the blade portions of adjacent blades to be co-planar when they are in the position shown in Figure 3.
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At the lower end o~ the blades (not shown in detail), each blade is provided with a pin inserted in a central bore 38 in the central rib 34 and such pin is then inserted through the aperture 32 in the bottom frame member ~8. A pin 39 of the kind just described may be seen in Figure 2.
Each o~ the blades 33 is provided, at its upper end, with a cranked pin 40 having a lower portion 41 adapted to be inserted in the bore 38. Small tabs 4~ may be struck from the material of the pin 40 and these tabs may be received in -`
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slots 43 in the bore 38 so as to ~ix the cranked pin 40 rela-tive to the blade 33 to resist rotation relative thereto.
The upper portion of the cranked pin 40 is of~-set as at 44.
: The blades 33 are pivotally mounted in the upper ~rame .
member 29 by passing through apertures 45 provided tharein . aligned with apertures 32 in bottom frame member 28.
. The of~-set portions 44 of the cran~e~ pin 40 are then : ~ , ~ .received in a plurality of apertures 46 in a slidable plate 47 .. ~ lying above frame membPr 29 and linking the o~-set portions 44 of all o~ the cranked pins 40 associated with each of the .. ,~ . ~
blades 33.
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. From the construction so far described, it will be .,. ~ .
apparenk that the sliding plate 47 may be reciprocated to move the blades, in unison, ~rom the position shown in Figure . 3 to the position shown in Figure 4 and vice-versa.
The movement of the sliding plate 47 is achieved by a mechanism disclosed in Figure 1.
' First, the sliding plate 47 is supported in slotted .. ,' -. ....................... .
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tab~ ~ carried by the upper frame me~ber 29 and, cen-trally of i~s length, is provided with an operating arm or extension 49. ~:
Secured to the inner door shell 10 is a mounting bracket : 50 upon which is pivotally carried a downwardly extending lever 51 to which is welded~ at 52, a spring steel element 53 which extends upw~rdly to position a hori70ntally disposed portion 54~ immediately inside and below an elongated horizon-~al slot 55 formed in the inner door shell 10 The oven construction with which the door is associated is provided with a door locking element comprising a rod 56 having a formation of a hooked end 57 which projects through the portion 58 of the stove construction and which is posi- .
tioned so that it will enter the elongated horizontal slot 55 ~ , . ..
~ when the door is in the closed position. As long as the hooked ':~ portion 57 is in the horizontal position shown in Figure 1, the door may be freely opened and closed without interference. ~ ~
~ However, when the high temperature, self-cleaning, ~:
:~ . pyrolitic cycle is initiated, the shaft 56 is rotated through .
- i .
substantially 90 in the direction of the arrow 59 with the.
door in the closed pOS.Ltion. The hooked portion 57, during this rotation, will encounter the horizontal portion 54 Q~ t~e .;
element 53 which will be pressed downwardly, thereby causing ~ :
:
~ the lever 51 to pivot to the right about pin 60 as seen in .: Figure 1.
Turning now to~Figure 5, lever 51 may be seen to be provided with a forwardly projecting tab 61 at ~its l~wer end, ~`~
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provid~d ~ith an ap~rture 62 within whieh is rec~i~ed the hooked end 63 of a stif~ wire 64. The stif wire 64 engages :
, operating arm 49 of the sliding plate 47. The arm 49 is .~ provided with an upwardly bent portion 65 at its ~ree end and t~is portion 65 is slotted at 66, the slot passing entirely through the element 65 and a short distance into the horizon-tal extent of the arm 49. The stiff wire 64 is provided wi-th a suitably located croo~ at 67 which engages the slot 66 and, thereby, is firmly secured to the arm 49. The end 68 of the .10 wire 64 is either formed into or secured to a tension spring :
69, the :Eree end of which is mounted to a bracket 70 carried .. by the inner door shell 10.
,............. The spring 69 will constantly urge the arm 49 and, s r`:"' therefore, the sliding plate 47 to the left, as seen in Figure 1 and will urge, therefore, the shutters or blades 33 ~:
to the "open" position as shown in Figure 1. This position is determined by a stop constituted by a tab 71 struck up from the material of the sliding plate 47 which engages the - :;
. ~ slotted bracket 48 within which the sliding plate 47 is ."i ~ 20 received.
.
When the door is closed and sha~t 56 is rotated .: through substantially 90 to lock the door, the hooked end 57 of the door locking element will, in addition to engaging , ,1 . ~ .
the interior sur~ace o~ the inner door shell 10 to thereby lock it in the closed position, also depress the horizontaI
element 54, swing the lever 51 to the right as seen in Figure ~
. .; ~j 1, slide the sliding plate 47 to the right as seen in Figure -,; .
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1 and move the blades 33 from the position shown in Figure 4 to the position shown in Figure 3, thereby effeckively shuttering the oven door window in a manner whi~h will make it possible for the windowed door to re~ain the high temperatures within the oven for the self-cleaning cycle and to reduce the heat loss and radiation through the window to an acceptable ~:
level.
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02~
The presen~ invention, however, makes it possible to retain the advantages of a window in the oven door while, at the same time, providing simple and automatic means whereby, during the high temperature self-cleaning cycle, the window may be obstructed so as to retain the high temperature within the oven and to prevent both exces.sive heat loss and radiation through the window. -According to the present invention, in one embodiment, an oven door window is provided with a peripheral frame within which are mounted a plurality of spaced, parallel~ substan-tially flat blades, rotatable about their longitudinal axes from a first position in which the flat blades are parallel to one another and normal to the plane containing the window ,.j , ~
I so that the interior of the oven may be viewed between the blades, to a second position wherein the blades are rotated ~ through substantially 90 so as to lie in substantially a "'' ;:~
single plane parallel to the plane of the window whereby the window is completely obstructed and closed by the blades, , ~ . .
operating means being provided to simultaneously move all of the blades as a result of a door locking function which is a preced~nt to the initiation to the self-cleaning cycle.
A preferred embodiment of the invention will now be disclosed in detail with reference to the accompanying ; drawings in which like parts are denoted by like reference numerals in the various views and in which:
Figure 1 is a perspective view, partly cut away and exploded in order to sho~ an oven door embodying a shuttered , ~ , ,: - 3 ~
, , ^ .. . . . . .. .
window constructed and arranged in accoxdance wi~h the present invention;
Figure 2 is a section view taken along line 2-2 of an assembled door as illustrated in Figure l;
Figure 3 is a fragmentary detailed view of a portion o~
; the shutter actuating mechanism illustrated in Figure l;
~ igure 4 is a fragmentary detailed view showing the components o~ Figure 3 assembled and in a different position and Figure 5 is a fragmentary view showing a portion of the shutter actuating element.
Turning now to Figures 1 and 2, an oven door embodying the shuttered window of the present invention is illustrated.
In Figure 1, the door may be seen to comprise an inner shell 10 having flanged edges which will engage with an outer shell 11. Convenien~ly, the outer shell 11 is provided with flanged edges, the lower such edge being provided with tabs 12 which may be inserted in slots 13 in the corresponding edge of the ~:
, ~, . .
inner shell 10 to secure the two shells together along the lower edge. The upper edges may then be secured together by means of screws such as 14 received in corner brackets 15 carried by the upper corners o~ the outer shell 11 o~ the door. `
As seen in Figure 2, the inner shell 19 is also pro-vided with a rearwardly extending sheet metal plug or box-like portion 16 w~ich is of a size such that it will fit relatively snugly within the opaning to the oven. The oven ~ ; `
, ' 1~)7~
opening is indicated in dotted lines in Figure 2 by the oven upper wall 17 and the oven bottom wall 18.
The plug or box-like member 16 is secured to the rear-ward face o~ the inner shell 10 by brackets 16a and is pro-; viaed with a heat resistant, compressible se~l member 19 so that the oven door, when in its closed position, will tightly close the oven opening with the box-like section 16 extending slightly into the oven cavity.
The rear ~ace of the plug 16 i5 provided with an aperture defined by a peripheral flange 20~ the flange 20 receiving a sheet of heat resistant glass 21 such as that sold under the trade mark "PYREX".
The outer shell 11 o~ the door is also provided with an opening defined by an inwardly extending peripheral flange 22, this ~lange engaging the rim 23 o~ a frame 24 which mounts a pair of spaced, parallel panes of glass in a self-contained unit which is of conventional construction.
~, . . .
The plug or box~like section, interiorly of the glass pane 21 presents a recess aligned with the three panes of glass constitutiny the window in the door within which the shutter mechanism is mounted.
In Figure 1, the shutter mechanism will be seen to comprise a channel-section frame 25 which defines a rectangu-lar opening substantial~ly co-extensive with the size of the panes of glass constituting the window. The ~rame 25 com-prises side members 26 and 27 and a bottom me~ber 28 and a top member 29. The frame-is secured in,position by means of -brackets 30 which may be spot welded to tha inner surface of the plug or box-like member 16. Angular brackets 31 are then secured to the brackets 30 by means of screws so that one free end may bear upon one flange of the channel-section : ~
frame member and retain it in position. As seen in Figure 2, . .-.. the frame members (only 28 and 29 o~ which are shown) serve ~:
also to retain the pane of glass 21 within the flange 20.
Bottom and top frame members 28 and 29 are provided with .~ a plurality of spaced and aligned apertures 32 and 45 by means 10 of which the spaced, parallel, substantially flat blades 33 .
may be mounted as shown in Figure 1. The blades are capable .
of rotating through 90 from a irst position as sh~wn in Figure 1, in which they are parallel to one another and normal .~ to the panes of glass so that a housewife may see through the . :
window to a position in which the flat blades 33 are substan~
: tially co-planar and parallel to the panes of glass as shown, in a fragmentary view, in Figure 3. ~.
Turning now to Figures 3 and 4, each of the blades is formed from a length of extrusion, conveniently of aluminum, defined by a central rib portion 34 from which extends, on both sides, the blade portion 35 and 36. One of the blade portions 36 is provided with an off-set segment 37 along its edge 50 that, as seen in Figure 3, the end of blade portion 35 may lie within the off-set portion 3~ of an adjacent -blade, thereby enabling the blade portions of adjacent blades to be co-planar when they are in the position shown in Figure 3.
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At the lower end o~ the blades (not shown in detail), each blade is provided with a pin inserted in a central bore 38 in the central rib 34 and such pin is then inserted through the aperture 32 in the bottom frame member ~8. A pin 39 of the kind just described may be seen in Figure 2.
Each o~ the blades 33 is provided, at its upper end, with a cranked pin 40 having a lower portion 41 adapted to be inserted in the bore 38. Small tabs 4~ may be struck from the material of the pin 40 and these tabs may be received in -`
. ~ .
slots 43 in the bore 38 so as to ~ix the cranked pin 40 rela-tive to the blade 33 to resist rotation relative thereto.
The upper portion of the cranked pin 40 is of~-set as at 44.
: The blades 33 are pivotally mounted in the upper ~rame .
member 29 by passing through apertures 45 provided tharein . aligned with apertures 32 in bottom frame member 28.
. The of~-set portions 44 of the cran~e~ pin 40 are then : ~ , ~ .received in a plurality of apertures 46 in a slidable plate 47 .. ~ lying above frame membPr 29 and linking the o~-set portions 44 of all o~ the cranked pins 40 associated with each of the .. ,~ . ~
blades 33.
. ~: . , .
. From the construction so far described, it will be .,. ~ .
apparenk that the sliding plate 47 may be reciprocated to move the blades, in unison, ~rom the position shown in Figure . 3 to the position shown in Figure 4 and vice-versa.
The movement of the sliding plate 47 is achieved by a mechanism disclosed in Figure 1.
' First, the sliding plate 47 is supported in slotted .. ,' -. ....................... .
.' - 7 ~', -. . . ~ . .
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tab~ ~ carried by the upper frame me~ber 29 and, cen-trally of i~s length, is provided with an operating arm or extension 49. ~:
Secured to the inner door shell 10 is a mounting bracket : 50 upon which is pivotally carried a downwardly extending lever 51 to which is welded~ at 52, a spring steel element 53 which extends upw~rdly to position a hori70ntally disposed portion 54~ immediately inside and below an elongated horizon-~al slot 55 formed in the inner door shell 10 The oven construction with which the door is associated is provided with a door locking element comprising a rod 56 having a formation of a hooked end 57 which projects through the portion 58 of the stove construction and which is posi- .
tioned so that it will enter the elongated horizontal slot 55 ~ , . ..
~ when the door is in the closed position. As long as the hooked ':~ portion 57 is in the horizontal position shown in Figure 1, the door may be freely opened and closed without interference. ~ ~
~ However, when the high temperature, self-cleaning, ~:
:~ . pyrolitic cycle is initiated, the shaft 56 is rotated through .
- i .
substantially 90 in the direction of the arrow 59 with the.
door in the closed pOS.Ltion. The hooked portion 57, during this rotation, will encounter the horizontal portion 54 Q~ t~e .;
element 53 which will be pressed downwardly, thereby causing ~ :
:
~ the lever 51 to pivot to the right about pin 60 as seen in .: Figure 1.
Turning now to~Figure 5, lever 51 may be seen to be provided with a forwardly projecting tab 61 at ~its l~wer end, ~`~
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:
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provid~d ~ith an ap~rture 62 within whieh is rec~i~ed the hooked end 63 of a stif~ wire 64. The stif wire 64 engages :
, operating arm 49 of the sliding plate 47. The arm 49 is .~ provided with an upwardly bent portion 65 at its ~ree end and t~is portion 65 is slotted at 66, the slot passing entirely through the element 65 and a short distance into the horizon-tal extent of the arm 49. The stiff wire 64 is provided wi-th a suitably located croo~ at 67 which engages the slot 66 and, thereby, is firmly secured to the arm 49. The end 68 of the .10 wire 64 is either formed into or secured to a tension spring :
69, the :Eree end of which is mounted to a bracket 70 carried .. by the inner door shell 10.
,............. The spring 69 will constantly urge the arm 49 and, s r`:"' therefore, the sliding plate 47 to the left, as seen in Figure 1 and will urge, therefore, the shutters or blades 33 ~:
to the "open" position as shown in Figure 1. This position is determined by a stop constituted by a tab 71 struck up from the material of the sliding plate 47 which engages the - :;
. ~ slotted bracket 48 within which the sliding plate 47 is ."i ~ 20 received.
.
When the door is closed and sha~t 56 is rotated .: through substantially 90 to lock the door, the hooked end 57 of the door locking element will, in addition to engaging , ,1 . ~ .
the interior sur~ace o~ the inner door shell 10 to thereby lock it in the closed position, also depress the horizontaI
element 54, swing the lever 51 to the right as seen in Figure ~
. .; ~j 1, slide the sliding plate 47 to the right as seen in Figure -,; .
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1 and move the blades 33 from the position shown in Figure 4 to the position shown in Figure 3, thereby effeckively shuttering the oven door window in a manner whi~h will make it possible for the windowed door to re~ain the high temperatures within the oven for the self-cleaning cycle and to reduce the heat loss and radiation through the window to an acceptable ~:
level.
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Claims (19)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An oven door having a window and obstruction means for the window, the obstruction means comprising a peripheral rectan-gular frame, a plurality of spaced, parallel, substantially flat blades mounted within the frame for rotation about their longitu-dinal axes between a first, open position in which the blades lie in parallel planes, each normal to the plane of the window and a second, closed position in which the blades lie substantially in a single plane parallel to the plane of the window, the means mounting the blades for rotation within the frame comprising, at one end of each blade, a pin extending axially of the blade through one side of the frame and then extending transversely thereof to a pivotal attachment with an operating plate extending the length of the said one side of the frame and linking all the said pins together to rotate in unison, a rotatable locking element for locking the door in its closed position having a projection which will pass through a registering slot in the door in an unlocked angular position of the rotatable locking element but which will not pass through the slot in a locked angular position of the ro-tatable locking element, further means located within the oven door and connected to said operating plate, and rotatable at a position on said door structure upon engagement therewith by said projec-tion of said rotatable locking element when rotated to its locked angular position so that the rotation of said rotatable locking element is converted by rotation of said further means and its con-nection to said operating plate to a reciprocating movement of the operating plate to move, in unison, the blades from their first open position to their second closed position.
2. An oven door as claimed in claim 1 wherein means are provided to bias the blades to their first open position.
3. An oven door as claimed in claim 2 wherein the means to bias the blades to their first open position comprises a tension coil spring extending between one end of the operating plate and standing structure on the oven door.
4. In a range oven door adapted to close an access opening to an oven chamber and having a window opening closed by a window, a shutter assembly associated with said window comprising a plurality of movable louver members arranged across the area of said window to cover and uncover said window, means operably joining to move said members in unison including yieldable means for holding said members in position to uncover said window to provide viewing areas therethrough, said means operably joining to move said members in unison being adapted to be moved by means external of said door to position said members to cover said window against the force of said yieldable means when it is desired to cover said window with said oven door being positioned to close said access opening to the oven chamber.
5. A cooking range having an oven chamber and an access opening to said chamber, a door for closing said opening, latching means for said door, said door having a window com-prising a pair of transparent panels arranged in spaced apart relation for viewing therethrough said oven chamber, a shutter arrangement for said window comprising, a plurality of movable segments between said trans-parent panels and being arranged to cooperatively form an intermediate planar wall between said panels in one position and assume independent transverse positions in another, and said latching means being operable with said movable segments to actuate said segments into at least one of said positions.
6. A range oven door provided with a transparent window formed of a plurality of transparent panels in spaced apart relation, shutter means for selectively covering and uncovering said window, the combination comprising, a frame member interposed in fixed relation between certain of said transparent panels to extend along certain marginal edge portions of said transparent panels, a plurality of louvers reciprocally mounted to said frame member and adapted to alternately cover and uncover said window, means operably connecting said louvers and being operable to reciprocally move said louvers in unison, and latching means for said door being adapted to engage and operate said means to set said louvers in position to cover said window while effecting a latching of said door.
7. A range oven door of claim 6 including, means associated with said louvers to return said louvers to position to uncover said window, said last mentioned means being made operative by said latching means in effecting the unlatching of said door.
8. A range oven door of Claim 6 including, resilient means associated with said operable means to yieldably hold said louvers in position uncovering said window.
9. An oven construction for a heat cleaning oven includ-ing:
means defining a forwardly-open oven, a door for closing said oven;
latching means for said door and operable between one and an opposite position for effecting latching and unlatching, respectively, of said door to said oven defining means;
at least a pair of windows spaced apart in said door on opposite sides of a generally planar space defined in part between said windows;
a shutter assembly in said door operable between open and closed positions in said generally planar space;
and means connecting said shutter assembly to said latch-ing means for operating said shutter assembly between a closed and an open position in accordance with operation of said latching means between said one and said opposite positions respectively.
means defining a forwardly-open oven, a door for closing said oven;
latching means for said door and operable between one and an opposite position for effecting latching and unlatching, respectively, of said door to said oven defining means;
at least a pair of windows spaced apart in said door on opposite sides of a generally planar space defined in part between said windows;
a shutter assembly in said door operable between open and closed positions in said generally planar space;
and means connecting said shutter assembly to said latch-ing means for operating said shutter assembly between a closed and an open position in accordance with operation of said latching means between said one and said opposite positions respectively.
10. In a range oven door adapted to close an access open-ing to an oven chamber and having a window opening closed by a window, a shutter assembly associated with said window comp-rising a plurality of movable louver members arranged across the area of said window to cover and uncover said window, means operably joining to move said members in unison including yieldable means for holding said members in position to uncover said window to provide viewing areas therethrough, and said operable means being extended externally of said door to be operationally engaged to position said members to cover said window against the force of said yielding means.
11. A cooking range having an oven chamber and an access opening to said chamber, a door for closing said opening, latching means for said door, said door having a window comprising a pair of transparent panels arranged in spaced apart relation for viewing therethrough said oven chamber, a shutter arrangement for said window comprising, a plurality of movable segments between said trans-parent panels and being arranged to cooperatively form an intermediate planar wall between said panels in one position and assume independent transverse positions in another, and said latching means being operable with said movable segments to actuate said segments into at least one of said positions.
12. A range oven door provided with a transparent window formed of a plurality of transparent panels in spaced apart relation, shutter means for selectively covering and uncovering said window, the combination comprising, a frame member interposed in fixed relation between certain of said transparent panels to extend along certain marginal edge portions of said transparent panels, a plurality of louvers reciprocally mounted to said frame member and adapted to alternately cover and uncover said window, operable means connecting said louvers and being oper-able to reciprocally move said louvers in unison, and latching means for said door being adapted to engage and operate said means to set said louvers in position to cover said window while effecting a latching of said door.
13. A range oven door of claim 12, including;
means associated with said louvers to return said louvers to position to uncover said window, said last mentioned means being made operative by said latching means in effecting the unlatching of said door.
means associated with said louvers to return said louvers to position to uncover said window, said last mentioned means being made operative by said latching means in effecting the unlatching of said door.
14. A range oven door of claim 12 including;
resilient means associated with said operable means to yieldably hold said louvers in position uncovering said window.
resilient means associated with said operable means to yieldably hold said louvers in position uncovering said window.
15. A range oven door of claim 14, including;
said latching means being operable to disengage from said operable means upon unlatching said door, said resilient means being operable by said latching means in the latching of said door to store energy for subsequent use to operate said operable means upon its release from said latching means to reposition said louvers to uncover said window.
said latching means being operable to disengage from said operable means upon unlatching said door, said resilient means being operable by said latching means in the latching of said door to store energy for subsequent use to operate said operable means upon its release from said latching means to reposition said louvers to uncover said window.
16. A door for closing an access opening to an oven chamber formed in a range body, latching means for select-ively latching said door including a latch member on said door being operable to engage a keeper carried by said range body, a window opening in said door covered by a window assembly including transparent glass panes arranged in spaced apart relation for viewing therethrough said oven chamber, a shutter assembly interposed between certain of said glass panes and extending substantially across the viewing area of said window assembly and comprising;
a frame member, a plurality of louvers each being journaled to said frame member for reciprocal movement, means interconnecting said louvers to pivotally actuate said Louvers in unison into a first position and a second position wherein said first position positions said louvers to provide unobstructed viewing areas between said louvers for see through into said chamber through said window and in the second position said louvers cooperatively forming a planar wall between said glass panes covering the viewing area of said window, and said means being operably engaged by said latch member to be actuated to actuate said louvers to said second position as said latch member is being operated to engage said keeper.
a frame member, a plurality of louvers each being journaled to said frame member for reciprocal movement, means interconnecting said louvers to pivotally actuate said Louvers in unison into a first position and a second position wherein said first position positions said louvers to provide unobstructed viewing areas between said louvers for see through into said chamber through said window and in the second position said louvers cooperatively forming a planar wall between said glass panes covering the viewing area of said window, and said means being operably engaged by said latch member to be actuated to actuate said louvers to said second position as said latch member is being operated to engage said keeper.
17. The door of claim 16 including;
said louvers having the characteristic of being a heat reflective barrier when in the second position.
said louvers having the characteristic of being a heat reflective barrier when in the second position.
18. In a range having a door for closing an access open-ing of an oven chamber formed in the range body, latching means for said door including a latch member on said door being operable to alternately engage and disengage with a keeper carried on said range body, a window opening in said door covered by a window assembly including transparent glass panes arranged in spaced relation supported in a frame, shutter means for said window and being operable to select-ively cover and uncover said window comprising, a frame member affixed between certain of said glass panes and being extended along marginal edges thereof a plurality of louvers journaled to said frame member for reciprocal movement and being arranged when set in cover position to form a planar wall between and extending substantially across the viewing area of certain of said glass panes, means movably interconnecting said louvers for movement in unison, drive means adapted to be operably engaged and released alternately by said latch member, said drive means coupled to move and hold said louvers in cover position while in engagement with said latch member, and means arranged with and being operable by said drive means to store energy to operably actuate said drive means in setting said louvers in uncover position upon said drive means being released by said latch member.
19. In a range of claim 18 including;
said last mentioned means being a resilient member to yieldably hold said louvers in uncover position.
said last mentioned means being a resilient member to yieldably hold said louvers in uncover position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB602868 | 1968-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070200A true CA1070200A (en) | 1980-01-22 |
Family
ID=9807105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA041,753A Expired CA1070200A (en) | 1968-02-07 | 1969-02-01 | Shuttered oven-door window |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3565054A (en) |
| CA (1) | CA1070200A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2006621C2 (en) * | 1970-02-13 | 1982-11-18 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Oven and roasting tube |
| US3643647A (en) * | 1970-10-26 | 1972-02-22 | Mills Prod Inc | Thermostatically controlled heat shield for window units in pyrolytic ovens |
| JPS54106165U (en) * | 1978-01-09 | 1979-07-26 | ||
| US4374320A (en) * | 1981-05-18 | 1983-02-15 | White Consolidated Industries, Inc. | Motorized oven door latch and control circuit for same |
| FR2672080B1 (en) * | 1991-01-25 | 1993-12-03 | Moulinex | HOUSEHOLD APPLIANCE DOOR AND ITS BUILT-IN METHOD. |
| USD431416S (en) * | 1999-04-14 | 2000-10-03 | Thermador Corporation | Oven cooking chamber |
| USD424862S (en) * | 1999-04-14 | 2000-05-16 | Thermador Corporation | Wall oven |
| DE10032733C2 (en) * | 2000-07-05 | 2003-08-21 | Schott Glas | Viewing window for household appliances |
| DE10103949A1 (en) * | 2001-01-30 | 2002-08-01 | Bsh Bosch Siemens Hausgeraete | Thermally-efficient oven door with window, includes louver opened and closed by electrical- or thermodynamic actuator to allow visual internal inspection |
| KR20040096140A (en) * | 2003-05-07 | 2004-11-16 | 삼성전자주식회사 | Oven |
| KR100835593B1 (en) * | 2003-05-31 | 2008-06-09 | 삼성전자주식회사 | Display apparatus and control method of display condition therof |
| US8578925B2 (en) * | 2005-07-27 | 2013-11-12 | Whirlpool Corporation | Oven door assembly incorporating overlay member |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3433213A (en) * | 1967-11-15 | 1969-03-18 | Kelvinator Inc | Shutter for window in oven door |
-
1969
- 1969-02-01 CA CA041,753A patent/CA1070200A/en not_active Expired
- 1969-02-03 US US796023A patent/US3565054A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3565054A (en) | 1971-02-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |