CA1174904A - Apparatus for insulating windows - Google Patents
Apparatus for insulating windowsInfo
- Publication number
- CA1174904A CA1174904A CA000413456A CA413456A CA1174904A CA 1174904 A CA1174904 A CA 1174904A CA 000413456 A CA000413456 A CA 000413456A CA 413456 A CA413456 A CA 413456A CA 1174904 A CA1174904 A CA 1174904A
- Authority
- CA
- Canada
- Prior art keywords
- sheet
- window
- roller
- storage roller
- glazings
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
- E06B3/6715—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased thermal insulation or for controlled passage of light
- E06B3/6722—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased thermal insulation or for controlled passage of light with adjustable passage of light
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/64—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor with lowerable roller
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
ABSTRACT
A window construction capable of restricting heat transmission having a built in reflective roller shade like apparatus com-prising a continuous sheet extendable in a plurality of spaced apart layers by means of spacer rollers for creating insulting air spaces when extended.
A window construction capable of restricting heat transmission having a built in reflective roller shade like apparatus com-prising a continuous sheet extendable in a plurality of spaced apart layers by means of spacer rollers for creating insulting air spaces when extended.
Description
7~9C~4 FIELD OF THE INVENTION
The present invention related to a window construction having a continuous reflective sheet extendable in a plurality of spaced apart layers between the glazings for thermal insula-tion and privacy.
PRIOR ACT
Multiple glazings are used in windows for reducing heat losses by creating still air spaces; however radiation losses are still high due to the high absorbance and emissivity coefficients of glass to infrared radiation. It is known that shades with a plurality of spaced apart reflective layers are very effective because they create insulating still air spaces separated by low emissivity layers. Such an apparatus is disclosed in Canadian Patent No. 1,120,784 wherein a shade is made from a plurality of reflective sheets which are simultaneously unrolled from a storage roller and drawn across the area of the window while being kept spaced apart by spacer bars, rollers or strips.
L'74~0~
SUMMARY OF THE INVENTION
It is the purpose of this invention to devise a window construction having a simpler apparatus for achieving the above objective by using not a plurality of sheets drawn simultaneously but a single continuous reflective sheet extended in a plurality of spaced apart layers. This is done by having a continuous flexible reflective sheet which is stored on a storage roller hidden in the upper member of the window frame during daytime having its free end fastened to the upper member, extended downward and kept spaced apart by a vertically free moving spacer weight roller when the sheet is unrolled from the storage roller.
For extending the sheet in a two-layer configuration a single spacer weight roller extends the sheet downward by gravity as the storage roller is rotated to unwind the sheet.
For extending the sheet in a 4-layer or more configuration free rotating stationary rollers mounted along the upper window frame member alternate with spacer weight rollers. As the sheet is unwound from the storage roller, the stationary spacer rollers and the spacer weight rollers combine their action for extending the sheet in a plurality of spaced apart layers.
~74~
The portion of sheet thus extended in spaced apart layers define enclosed air spaces of thickness generally equal to the diameter of the rollers. The thickness of these air spaces is preferably close to the optimum thickness for the maximum air insulation resistance having the minimum natural convection.
The sheet being reflective the multiple layers eliminate losses through radiation and provide privacy as a side benefit.
DESCRIPTION OF THE DRAWINGS
. .
Figure 1 is a vertical cross-sectional view of the window construction showing the sheet extended in a two-layer confi-guration creating three air spaces in the insulating mode.
Figure 2 is a vertical cross-sectional view of the window cons-truction showing the sheet extended in a larger number of layers creating a larger number of air spaces in the insulating mode.
, ~749Q4 Referring now to Figure 1, in a window construction having a transparent area defined by glazings 18, a continuous flexlble reflective sheet 2 of width equal to the horizontal width of the transparent area of the window and of length a plurality of times the vertical length of the transparent area of the window, has one end edge attached squarely to storage roller 4 mounted between glazings 18 adjacent to top member 11 of the window frame perpendicularly to the vertical side member 13 of the window frame and in a pla~e generally parallel to glazings 18, the other end edge of the sheet being attached squarely to the top member 11 of the window frame between the glazings 18 by fastening bar 6 which is parallel to storage roller 4 and spaced away from the vertical unrolling plane of the sheet from storage roller 4 a distance approximately equal to the diameter of spacer weight roller 8.
Spacer weight roller 8 is vertically free moving and suspended on sheet 2 intermediate storage roller 4 and fastening bar 6, being at dotted position 9 when sheet 2 is fully wound up on storage 4 in the light transmitting mode. As sheet 2 is unrolled from sto-rage roller 4, it is pulled downward and tensioned by spacer weight roller 8 in two spaced apart portions of sheet cooperating with glazings 18 to define three air spaces 16 in the insulating mode.
1~4~04 Flexible seals 12 attached inside the vertical side members 13 of the window frame and parallel to the vertical side edges of sheet 2 seal the gap between the vertical edges of sheet 2 and the vertical side members 1~ of the window frame and seals 14 seal the bottom edge of sheet 2 against the bottom member 15 of the window frame in order to reduce convection air flow between the enclosed spa~ces 16. Seals 12 also serve to guide spacer weight roller 8 vertically.
Figure 2 shows how the addition of stationary spacer rollers 22 mounted along the top window frame member intermediate the sto-rage roller 4 and the fastening bar 6, plus additional spacer weight rollers 8 can increase the number of reflective layers and enclosed air spaces for increased thermal insulation.
Storage roller 4 may be reversibly rotated manually by such means as illustrated by hand crank 24 or through a cord driven pulley (not shown) at the end of storage roller 4, or it may be rotated by a reversible electrical or air motor in which case limit switch 20 (Fig. 1) stops the motor when contacted by storage roller 8 when sheet 2 is fully extended.
The window construction may be of a standard double glazed unsealed openable sliding type or of a double glazed sealed type, the reflec-tive sheet being extendable between the two glazings. In the latter case, driving the storage roller inside the double glazing requires effectively sealing the driving mechanism with means such as seals 26 in Fig. 2 or the use of a magnetic coupling to preserve the sealed characteristics of the window as illustrated in Fig. 3, ~ L9 QJ~
where a reversible motor 28 rotates a first magnet 30 which drives a second permanent magnet 34 inside the sealed window (a portion of which is only shown) through sealing membrane 32 made of a magnetically permeable material such as aluminum or plastics.
Altough arrangements have been shown wherein the insulating sheet 2 is mounted between a pair of glazings as in a double glazed window, it is readily appreciated that the insulating sheet 2 may be also mounted on the room side of a window as illustrated in Fig. 2 by removing the inner glazing as shown by dotted line 19.
In the preferred embodiments of the invention at least one and preferably both side of the sheet are highly reflective to in-frared radiation, having low absorbance and emittance coefficients.
Aluminized polyethylene teraphthalate film is most suitable.
While only certain embodiments of the invention have been des-cribed it is apparent that modification may be made without departing from the true scope and spirit thereof as defined in the appended claims.
The present invention related to a window construction having a continuous reflective sheet extendable in a plurality of spaced apart layers between the glazings for thermal insula-tion and privacy.
PRIOR ACT
Multiple glazings are used in windows for reducing heat losses by creating still air spaces; however radiation losses are still high due to the high absorbance and emissivity coefficients of glass to infrared radiation. It is known that shades with a plurality of spaced apart reflective layers are very effective because they create insulating still air spaces separated by low emissivity layers. Such an apparatus is disclosed in Canadian Patent No. 1,120,784 wherein a shade is made from a plurality of reflective sheets which are simultaneously unrolled from a storage roller and drawn across the area of the window while being kept spaced apart by spacer bars, rollers or strips.
L'74~0~
SUMMARY OF THE INVENTION
It is the purpose of this invention to devise a window construction having a simpler apparatus for achieving the above objective by using not a plurality of sheets drawn simultaneously but a single continuous reflective sheet extended in a plurality of spaced apart layers. This is done by having a continuous flexible reflective sheet which is stored on a storage roller hidden in the upper member of the window frame during daytime having its free end fastened to the upper member, extended downward and kept spaced apart by a vertically free moving spacer weight roller when the sheet is unrolled from the storage roller.
For extending the sheet in a two-layer configuration a single spacer weight roller extends the sheet downward by gravity as the storage roller is rotated to unwind the sheet.
For extending the sheet in a 4-layer or more configuration free rotating stationary rollers mounted along the upper window frame member alternate with spacer weight rollers. As the sheet is unwound from the storage roller, the stationary spacer rollers and the spacer weight rollers combine their action for extending the sheet in a plurality of spaced apart layers.
~74~
The portion of sheet thus extended in spaced apart layers define enclosed air spaces of thickness generally equal to the diameter of the rollers. The thickness of these air spaces is preferably close to the optimum thickness for the maximum air insulation resistance having the minimum natural convection.
The sheet being reflective the multiple layers eliminate losses through radiation and provide privacy as a side benefit.
DESCRIPTION OF THE DRAWINGS
. .
Figure 1 is a vertical cross-sectional view of the window construction showing the sheet extended in a two-layer confi-guration creating three air spaces in the insulating mode.
Figure 2 is a vertical cross-sectional view of the window cons-truction showing the sheet extended in a larger number of layers creating a larger number of air spaces in the insulating mode.
, ~749Q4 Referring now to Figure 1, in a window construction having a transparent area defined by glazings 18, a continuous flexlble reflective sheet 2 of width equal to the horizontal width of the transparent area of the window and of length a plurality of times the vertical length of the transparent area of the window, has one end edge attached squarely to storage roller 4 mounted between glazings 18 adjacent to top member 11 of the window frame perpendicularly to the vertical side member 13 of the window frame and in a pla~e generally parallel to glazings 18, the other end edge of the sheet being attached squarely to the top member 11 of the window frame between the glazings 18 by fastening bar 6 which is parallel to storage roller 4 and spaced away from the vertical unrolling plane of the sheet from storage roller 4 a distance approximately equal to the diameter of spacer weight roller 8.
Spacer weight roller 8 is vertically free moving and suspended on sheet 2 intermediate storage roller 4 and fastening bar 6, being at dotted position 9 when sheet 2 is fully wound up on storage 4 in the light transmitting mode. As sheet 2 is unrolled from sto-rage roller 4, it is pulled downward and tensioned by spacer weight roller 8 in two spaced apart portions of sheet cooperating with glazings 18 to define three air spaces 16 in the insulating mode.
1~4~04 Flexible seals 12 attached inside the vertical side members 13 of the window frame and parallel to the vertical side edges of sheet 2 seal the gap between the vertical edges of sheet 2 and the vertical side members 1~ of the window frame and seals 14 seal the bottom edge of sheet 2 against the bottom member 15 of the window frame in order to reduce convection air flow between the enclosed spa~ces 16. Seals 12 also serve to guide spacer weight roller 8 vertically.
Figure 2 shows how the addition of stationary spacer rollers 22 mounted along the top window frame member intermediate the sto-rage roller 4 and the fastening bar 6, plus additional spacer weight rollers 8 can increase the number of reflective layers and enclosed air spaces for increased thermal insulation.
Storage roller 4 may be reversibly rotated manually by such means as illustrated by hand crank 24 or through a cord driven pulley (not shown) at the end of storage roller 4, or it may be rotated by a reversible electrical or air motor in which case limit switch 20 (Fig. 1) stops the motor when contacted by storage roller 8 when sheet 2 is fully extended.
The window construction may be of a standard double glazed unsealed openable sliding type or of a double glazed sealed type, the reflec-tive sheet being extendable between the two glazings. In the latter case, driving the storage roller inside the double glazing requires effectively sealing the driving mechanism with means such as seals 26 in Fig. 2 or the use of a magnetic coupling to preserve the sealed characteristics of the window as illustrated in Fig. 3, ~ L9 QJ~
where a reversible motor 28 rotates a first magnet 30 which drives a second permanent magnet 34 inside the sealed window (a portion of which is only shown) through sealing membrane 32 made of a magnetically permeable material such as aluminum or plastics.
Altough arrangements have been shown wherein the insulating sheet 2 is mounted between a pair of glazings as in a double glazed window, it is readily appreciated that the insulating sheet 2 may be also mounted on the room side of a window as illustrated in Fig. 2 by removing the inner glazing as shown by dotted line 19.
In the preferred embodiments of the invention at least one and preferably both side of the sheet are highly reflective to in-frared radiation, having low absorbance and emittance coefficients.
Aluminized polyethylene teraphthalate film is most suitable.
While only certain embodiments of the invention have been des-cribed it is apparent that modification may be made without departing from the true scope and spirit thereof as defined in the appended claims.
Claims (4)
1. A window construction capable of reducing heat and light transmission in an insulating mode and allowing vision through in a light transmitting mode comprising:
a) a window having a pair of glazings and a frame surrounding and holding the glazings spaced apart and defining the transparent area of the window, b) a continuous flexible reflective sheet of width substan-tially the horizontal width of the transparent area of the window and of length a plurality of times the vertical length of the transparent area of the window, one end edge of the sheet being fastened to the top member of the window frame between the glazings;
c) a storage roller mounted horizontally along the top member of the window frame between the glazings, the end edge of the sheet apposite the said fastened end edge of the sheet being attached to the storage roller, for operatively winding the sheet up for storage in the light transmitting mode; and d) means for operatively extending the sheet downward between the glazings across the transparent area of the window in a plurality of spaced apart portions of sheet defining a plurality of air spaces enclosed by reflective walls thereby reducing heat and light transmission in the insulating mode.
a) a window having a pair of glazings and a frame surrounding and holding the glazings spaced apart and defining the transparent area of the window, b) a continuous flexible reflective sheet of width substan-tially the horizontal width of the transparent area of the window and of length a plurality of times the vertical length of the transparent area of the window, one end edge of the sheet being fastened to the top member of the window frame between the glazings;
c) a storage roller mounted horizontally along the top member of the window frame between the glazings, the end edge of the sheet apposite the said fastened end edge of the sheet being attached to the storage roller, for operatively winding the sheet up for storage in the light transmitting mode; and d) means for operatively extending the sheet downward between the glazings across the transparent area of the window in a plurality of spaced apart portions of sheet defining a plurality of air spaces enclosed by reflective walls thereby reducing heat and light transmission in the insulating mode.
2. The window construction of claim 1 wherein the means for operatively extending the sheet comprise:
a) means for reversibly rotating the storage roller;
b) stationary free rotating spacer roller mounted parallel to the storage roller near the top member of the frame intermediate the fastened end edge of the sheet and the storage roller, the sheet passing over the stationary spacer roller; and c) spacer weight rollers resting on the sheet intermediate the fastened end edge of the sheet and the stationary spacer roller and intermediate the stationary spacer roller and the storage roller for operatively extending the sheet downward as the sheet is unwound from the storage roller.
a) means for reversibly rotating the storage roller;
b) stationary free rotating spacer roller mounted parallel to the storage roller near the top member of the frame intermediate the fastened end edge of the sheet and the storage roller, the sheet passing over the stationary spacer roller; and c) spacer weight rollers resting on the sheet intermediate the fastened end edge of the sheet and the stationary spacer roller and intermediate the stationary spacer roller and the storage roller for operatively extending the sheet downward as the sheet is unwound from the storage roller.
3. The window construction of claim 1 wherein the means for operatively extending the sheet comprise:
a) means for reversibly rotating the storage roller; and b) a spacer weight roller resting on the sheet inter-mediate the fastened end edge of the sheet and the storage roller for operatively extending the sheet downward as the sheet is un-wound from the storage roller.
a) means for reversibly rotating the storage roller; and b) a spacer weight roller resting on the sheet inter-mediate the fastened end edge of the sheet and the storage roller for operatively extending the sheet downward as the sheet is un-wound from the storage roller.
4. The window construction of claims 1, 2 or 3 further comprising means between the side and bottom edges of the portions of the extended sheet and the frame of the window for sealing the gap between the edges of the portions of sheet and the window frame in the insulating mode for restricting the air currents between the enclosed air spaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000413456A CA1174904A (en) | 1982-10-14 | 1982-10-14 | Apparatus for insulating windows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000413456A CA1174904A (en) | 1982-10-14 | 1982-10-14 | Apparatus for insulating windows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1174904A true CA1174904A (en) | 1984-09-25 |
Family
ID=4123768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000413456A Expired CA1174904A (en) | 1982-10-14 | 1982-10-14 | Apparatus for insulating windows |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1174904A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1191183A3 (en) * | 2000-09-21 | 2003-07-23 | Manfred Dipl.-Phys. Schmidt | Insulation glass construction with a sheet like roller blind |
-
1982
- 1982-10-14 CA CA000413456A patent/CA1174904A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1191183A3 (en) * | 2000-09-21 | 2003-07-23 | Manfred Dipl.-Phys. Schmidt | Insulation glass construction with a sheet like roller blind |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |