CA1138715A - Framed dual pane window - Google Patents
Framed dual pane windowInfo
- Publication number
- CA1138715A CA1138715A CA000365751A CA365751A CA1138715A CA 1138715 A CA1138715 A CA 1138715A CA 000365751 A CA000365751 A CA 000365751A CA 365751 A CA365751 A CA 365751A CA 1138715 A CA1138715 A CA 1138715A
- Authority
- CA
- Canada
- Prior art keywords
- unit
- panes
- glass
- cabin
- frame
- 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
Landscapes
- Securing Of Glass Panes Or The Like (AREA)
Abstract
ABSTRACT
A multiple glazed unit for use in high temperature environ-ments comprises spacing means, sealant and a frame consisting of silicone plastics materials. The glass of the unit may be tempered, armour plated, laminated or radiant heat reflecting glass. The unit is used as an easily removable unit in observation or instru-ment control cabins in high temperature environments.
A multiple glazed unit for use in high temperature environ-ments comprises spacing means, sealant and a frame consisting of silicone plastics materials. The glass of the unit may be tempered, armour plated, laminated or radiant heat reflecting glass. The unit is used as an easily removable unit in observation or instru-ment control cabins in high temperature environments.
Description
FIELD OF THE INVENTION
The invention relates to multiple glazed window units especially for use in high temperature environments and to cabins for observation or control of instruments, such cabins as used in high temperature environments.
BACKGROUND OF THE INVENTION
Window units for industrial use especially in high temperature environments have provided various problems. The type of high temperature environment envisaged is that for example encountered by crane cabins of overhead cranes handling materials near furnaces or enclosed pulpits for observing or controlling furnace operations. Typical temperatures of environments in which operations must be carried out are 125-37.~F. Such windows are suitably double or triple glazed and the glass may be tempered, laminated, armour plated or radiant reflective. It is the con-ventional spacing, framing and sealing o~ units, that has caused problems. The panes may be separated by a metal spacer bar which is subject to heat expansion or contraction tending to displace sealant sealing around the edges and providing stresses in the glass.
Similarly metal U channel frames provided round the edges of the unit to make it an easily handleable removable item are also subject to expansion and contraction. The sealant itself causes problems in that it is frequently subject to either heat degra-dation or cracking and displacement. Attempts to replace metalspacers and frames with resilient plastics material have not met with success due to softening, hardening or increased aging due to ~`~ 113B715 the temperatures involved.
SUMMARY OF THE INVENTION
It has now been surprisingly discovered that the silicone based plastics materials which have a high degree of resistance to heat can be used as a spacing gasket, as a sealant and as a frame for a multiple glazed unit for use at high temperatures. Thus according to the invention we provide a multiple glazed window unit comprising at least two panes of glass, a spacer gasket of silicone plastics ma~erial separating adjacent panes, silicone plastics material caulking compound sealing around the periphery of said unit between adjacent panes, and a frame of silicone plastics material U~section, channel the legs of the U holding the outer panes between them. Also according to the invention we provide a cabin for observation for instrument control for use in high temperature environments comprising a housing having at least one multiple glazed window unit according to the invention.
DESCRIPTION TO THE DRAWINGS
An embodiment of the invention will now be described with reference to the accompanying drawings in which:
FIGURE 1 is a sketch of a multiple glazed window unit according to the invention having the frame cut away on two sides to reveal the spacing gasket and sealant;
FIGURE 2 i8 a section through part of the unit of Figure 1 when located in a surround therefor of a cabin; and ~ 3871S
FIGURE 3 is a sketch of a crane cabin according to the invention including units as illustrated in Figures 1 and 2.
FIGURE 4 is a view similar to figure 2 showing an alternative manner of installation of the window unit.
A multiple glazed window unit according to the invention as illustrated comprises two panes of glass 10, 12 spaced apart by a gasket 14 formed of silicone plastics material. The gasket 14 may suitably be a 1/4" thick. Moreover the gasket 14 may be formed of a strip or tape of silicone material which is sifficiently soft to absorb any vibration to which the window may be eventually subjected. The silicone gasket 14 extends around the margin of the unit between the panes of glass.
The panes of glass 10, 12 for use in high temperature environment may suitably be tempered, laminated, armour plated or radiant heat resistant glass. The thickness and number of these panes is a matter of choice and although a double glazed unit is illustrated it is to be noted that a third or further panes of glass might easily be added, each addition requiring the provision of an extra gasket 14.
Around the periphery of the combined panes of glass 10, 12 and gasket 14 sealant 16 is provided covering the edges of the glass and making firm the lines of abutment between each pane 10, 12 and the gasket 14. The sealant is a silicone plastics material in the form of a caulking material.
The glass panes 10, 12, gasket 14 and sealant 16 are, around the margins of the panes, held in a frame 18 comprising a U-shaped channel of silicone palstics material. The silicone plastics material in the place of the frame is possibly more rigid than that used for the gasket 14 so that the legs 20, 22 hold the 1~ :,,!, 3 ^ 1~3871S
panes of glass 10, 12 firmly therebetween. At the corners 24 the frame 18 may be mitered as shown in Figure 1 or any other suitable configuration of the corner may be used.
Lifting tabs 26 are provided in the embodiment illustrated.
These tabs 26 are formed by a loop of tape the ends of which are firmly wedged between opposite margins of the pane of glass 10 and leg 20 of the frame 18. The unit may thus be lifted by inserting a finger of each hand into the loop of each tab 26 and lifting the unit thereby. Other configurations of the tabs 26 are clearly possible and it is not necessary that they should be in the form of loops. Any suitable materials may be used for the construction of these tabs 26.
The glazed unit thus far described is of simple robust construction providing low accoustical transmission being easy and safe to handle, having low thermal transmission and good appearance.
It is found suitable for use at high temperatures and is especialIy suitable at temperatures in the range 12s-37sF. The silicone plastics materials are readily commercially available and the degrees of rigidity and resilience required in each of the gasket 14, the sealant 16 and the frame 18 are a matter of choice. What is surprising is that these materials are found suitable for all three functions in high temperature environments.
In use the above described unit may be set into a window surround in a cabin, preferably so that it may be removed therefrom for cleaning both the outer surface of glass pane 10 and the outer surface of glass pane 12. Suitably the surround may comprise horizontal and vertical surfaces in the thickness of the wall of the cabin possibly defined by surfaces of the main framework of the cabin. Figure 2 shows one of these surfaces 26 formed by a square tube 28 supporting an outer metal sheet 30 which is an outer wall of the cabin. The frame 18 of the unit does not rest directly on surface 26 but on a pad 32 of shim or other shock absorbing insulating material. The metal sheet 30 forming part of the outer casing of the cabin extends upwardly of surface 26 at right angles to it forming a guard wall 34 against which frame 18 abuts. The wall 34 prevents the unit from being pushable outwardly from the cabin. At least guide walls 34 are necessary on two opposing sides of the surround but normally they will be provided on all four sides.
In the embodiments shown in Figure 2 the unit is latched into position by an L-shaped latch 36 having an upstanding leg 38 biased against leg 20 of frame 18. The other leg 40 lies parallel to surface 26 latched in a latch socket 42. Socket 42 is itself a U-shaped member one leg 40 of which is attached to surface 26 and the other leg 44 of which overlies leg 40 of the latch member 36.
The latch 36 has a handle 48 by which it may be slid longitudinally in socket 42 thereby to be removed from said socket. When latch member 36 is removed from socket 42 its biassing restraint is removed from frame 18. When all the latches are freed from their sockets the unit is freely removable from the surround by tabs 26.
At least two of the described latching means must be provided at opposing edges of the unit but conveniently and normally four will be so provided. These latching means may be of any convenient length ranging practically from the length of the edge of the window ' ' ' ' .
- 11387~S
unit down to the minimum which is convenient to handle. In practice, however, the length of each latch 36 is unlikely to be greater than say five inch for a window surround of 24" x 24"
and an actual window unit of say 23 1/4" x 23 1/4".
S Figure 3 is a rough sketch of a crane cabin in general outline showing the outer surface of the cabin formed by metal sheets 36 and having windows therein formed by window units as described above of which only the outer pane 12 is visible in Figure 3. Each window unit is surrounded by a marginal portion .
or guard wall 34 of metal sheet 32.
', .
1~3~71~i SUPPLEMENTARY DISCLOSURE
An alternative method of retaining the window unit 8 within the window frame is shown in figure 4 where components similar to those shown in figure 2 are designated with like reference numerals with a suffix "A" added for clarity of description.
A gasket 50a is positioned between the leg 22a of the frame 18a and the surface 34a of metal sheet 30a to isolate the frame 18a and surface 30a. The latch 36 is replaced by a retaining strip 52a formed from an L shaped strip having vertical and horizontal arms 54a, 56a respectively. The included angle between the arms 54a, 56a in the free body state is approximately 100 so that a force must be applied to bring the arms into snug fit against the surface 27a and leg 20a.
This force is applied by a bolt 58a that passes through a hole 60a in the arm 56a and is received in a hole 62a in the tube 28a. The bolt 58a is preferably a tapered self tapping bolt that avoids the need for tapping the hole 62a. Upon tightening the bolt 58a, the arm 56a is drawn into contact with the surface 27a and flexes the arm 54a into abutment with the leg 20a. The arm 54a thus applies a resilient force against the frame 18 to hold the unit 8a in place.
The retaining strip 52a may be of any convenient length but preferably extends along the length of the frame and avoids the longitudinal drag exerted by the latch 36 on the frame 18 in the embodiment shown in Figure 2.
The invention relates to multiple glazed window units especially for use in high temperature environments and to cabins for observation or control of instruments, such cabins as used in high temperature environments.
BACKGROUND OF THE INVENTION
Window units for industrial use especially in high temperature environments have provided various problems. The type of high temperature environment envisaged is that for example encountered by crane cabins of overhead cranes handling materials near furnaces or enclosed pulpits for observing or controlling furnace operations. Typical temperatures of environments in which operations must be carried out are 125-37.~F. Such windows are suitably double or triple glazed and the glass may be tempered, laminated, armour plated or radiant reflective. It is the con-ventional spacing, framing and sealing o~ units, that has caused problems. The panes may be separated by a metal spacer bar which is subject to heat expansion or contraction tending to displace sealant sealing around the edges and providing stresses in the glass.
Similarly metal U channel frames provided round the edges of the unit to make it an easily handleable removable item are also subject to expansion and contraction. The sealant itself causes problems in that it is frequently subject to either heat degra-dation or cracking and displacement. Attempts to replace metalspacers and frames with resilient plastics material have not met with success due to softening, hardening or increased aging due to ~`~ 113B715 the temperatures involved.
SUMMARY OF THE INVENTION
It has now been surprisingly discovered that the silicone based plastics materials which have a high degree of resistance to heat can be used as a spacing gasket, as a sealant and as a frame for a multiple glazed unit for use at high temperatures. Thus according to the invention we provide a multiple glazed window unit comprising at least two panes of glass, a spacer gasket of silicone plastics ma~erial separating adjacent panes, silicone plastics material caulking compound sealing around the periphery of said unit between adjacent panes, and a frame of silicone plastics material U~section, channel the legs of the U holding the outer panes between them. Also according to the invention we provide a cabin for observation for instrument control for use in high temperature environments comprising a housing having at least one multiple glazed window unit according to the invention.
DESCRIPTION TO THE DRAWINGS
An embodiment of the invention will now be described with reference to the accompanying drawings in which:
FIGURE 1 is a sketch of a multiple glazed window unit according to the invention having the frame cut away on two sides to reveal the spacing gasket and sealant;
FIGURE 2 i8 a section through part of the unit of Figure 1 when located in a surround therefor of a cabin; and ~ 3871S
FIGURE 3 is a sketch of a crane cabin according to the invention including units as illustrated in Figures 1 and 2.
FIGURE 4 is a view similar to figure 2 showing an alternative manner of installation of the window unit.
A multiple glazed window unit according to the invention as illustrated comprises two panes of glass 10, 12 spaced apart by a gasket 14 formed of silicone plastics material. The gasket 14 may suitably be a 1/4" thick. Moreover the gasket 14 may be formed of a strip or tape of silicone material which is sifficiently soft to absorb any vibration to which the window may be eventually subjected. The silicone gasket 14 extends around the margin of the unit between the panes of glass.
The panes of glass 10, 12 for use in high temperature environment may suitably be tempered, laminated, armour plated or radiant heat resistant glass. The thickness and number of these panes is a matter of choice and although a double glazed unit is illustrated it is to be noted that a third or further panes of glass might easily be added, each addition requiring the provision of an extra gasket 14.
Around the periphery of the combined panes of glass 10, 12 and gasket 14 sealant 16 is provided covering the edges of the glass and making firm the lines of abutment between each pane 10, 12 and the gasket 14. The sealant is a silicone plastics material in the form of a caulking material.
The glass panes 10, 12, gasket 14 and sealant 16 are, around the margins of the panes, held in a frame 18 comprising a U-shaped channel of silicone palstics material. The silicone plastics material in the place of the frame is possibly more rigid than that used for the gasket 14 so that the legs 20, 22 hold the 1~ :,,!, 3 ^ 1~3871S
panes of glass 10, 12 firmly therebetween. At the corners 24 the frame 18 may be mitered as shown in Figure 1 or any other suitable configuration of the corner may be used.
Lifting tabs 26 are provided in the embodiment illustrated.
These tabs 26 are formed by a loop of tape the ends of which are firmly wedged between opposite margins of the pane of glass 10 and leg 20 of the frame 18. The unit may thus be lifted by inserting a finger of each hand into the loop of each tab 26 and lifting the unit thereby. Other configurations of the tabs 26 are clearly possible and it is not necessary that they should be in the form of loops. Any suitable materials may be used for the construction of these tabs 26.
The glazed unit thus far described is of simple robust construction providing low accoustical transmission being easy and safe to handle, having low thermal transmission and good appearance.
It is found suitable for use at high temperatures and is especialIy suitable at temperatures in the range 12s-37sF. The silicone plastics materials are readily commercially available and the degrees of rigidity and resilience required in each of the gasket 14, the sealant 16 and the frame 18 are a matter of choice. What is surprising is that these materials are found suitable for all three functions in high temperature environments.
In use the above described unit may be set into a window surround in a cabin, preferably so that it may be removed therefrom for cleaning both the outer surface of glass pane 10 and the outer surface of glass pane 12. Suitably the surround may comprise horizontal and vertical surfaces in the thickness of the wall of the cabin possibly defined by surfaces of the main framework of the cabin. Figure 2 shows one of these surfaces 26 formed by a square tube 28 supporting an outer metal sheet 30 which is an outer wall of the cabin. The frame 18 of the unit does not rest directly on surface 26 but on a pad 32 of shim or other shock absorbing insulating material. The metal sheet 30 forming part of the outer casing of the cabin extends upwardly of surface 26 at right angles to it forming a guard wall 34 against which frame 18 abuts. The wall 34 prevents the unit from being pushable outwardly from the cabin. At least guide walls 34 are necessary on two opposing sides of the surround but normally they will be provided on all four sides.
In the embodiments shown in Figure 2 the unit is latched into position by an L-shaped latch 36 having an upstanding leg 38 biased against leg 20 of frame 18. The other leg 40 lies parallel to surface 26 latched in a latch socket 42. Socket 42 is itself a U-shaped member one leg 40 of which is attached to surface 26 and the other leg 44 of which overlies leg 40 of the latch member 36.
The latch 36 has a handle 48 by which it may be slid longitudinally in socket 42 thereby to be removed from said socket. When latch member 36 is removed from socket 42 its biassing restraint is removed from frame 18. When all the latches are freed from their sockets the unit is freely removable from the surround by tabs 26.
At least two of the described latching means must be provided at opposing edges of the unit but conveniently and normally four will be so provided. These latching means may be of any convenient length ranging practically from the length of the edge of the window ' ' ' ' .
- 11387~S
unit down to the minimum which is convenient to handle. In practice, however, the length of each latch 36 is unlikely to be greater than say five inch for a window surround of 24" x 24"
and an actual window unit of say 23 1/4" x 23 1/4".
S Figure 3 is a rough sketch of a crane cabin in general outline showing the outer surface of the cabin formed by metal sheets 36 and having windows therein formed by window units as described above of which only the outer pane 12 is visible in Figure 3. Each window unit is surrounded by a marginal portion .
or guard wall 34 of metal sheet 32.
', .
1~3~71~i SUPPLEMENTARY DISCLOSURE
An alternative method of retaining the window unit 8 within the window frame is shown in figure 4 where components similar to those shown in figure 2 are designated with like reference numerals with a suffix "A" added for clarity of description.
A gasket 50a is positioned between the leg 22a of the frame 18a and the surface 34a of metal sheet 30a to isolate the frame 18a and surface 30a. The latch 36 is replaced by a retaining strip 52a formed from an L shaped strip having vertical and horizontal arms 54a, 56a respectively. The included angle between the arms 54a, 56a in the free body state is approximately 100 so that a force must be applied to bring the arms into snug fit against the surface 27a and leg 20a.
This force is applied by a bolt 58a that passes through a hole 60a in the arm 56a and is received in a hole 62a in the tube 28a. The bolt 58a is preferably a tapered self tapping bolt that avoids the need for tapping the hole 62a. Upon tightening the bolt 58a, the arm 56a is drawn into contact with the surface 27a and flexes the arm 54a into abutment with the leg 20a. The arm 54a thus applies a resilient force against the frame 18 to hold the unit 8a in place.
The retaining strip 52a may be of any convenient length but preferably extends along the length of the frame and avoids the longitudinal drag exerted by the latch 36 on the frame 18 in the embodiment shown in Figure 2.
Claims (10)
- EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE, PROPERTY OR
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
A Multiple glazed window unit comprising at least two panes of glass, a spacer gasket of silicone plastics material separating adjacent panes, silicone plastics material caulking compound sealing around the periphery of said unit between adjacent panes, and a frame of silicone plastics material having a U-shaped cross section, the legs of the U defining a channel to receive panes. - 2. A unit as claimed in claim 1 in which the glass of the panes is selected from tempered glass, laminated glass, armour plated glass and radiant reflective glass.
- 3. A unit as claimed in claim 1 provided with a handling tab attached to the unit between at least one of the panes and the frame.
- 4. A cabin for observation or instrument control for use in high temperature environments comprising a housing having at least one multiple glazed window unit comprising at least two panes of glass, a spacer gasket of silicone plastics material separating adjacent panes, silicone plastics material caulking compound sealing around the periphery of said unit between adjacent panes, and a frame of silicone plastics material having a U shaped cross section, the legs of the U defining a channel to receive the panes.
- 5. A cabin as claimed in claim 4 in which the glass of the panes is selected from tempered glass, laminated glass, armour plated glass and radiant reflective glass.
- 6. A cabin as claimed in claim 4 in which a handling tab is attached to the unit between at least one of the panes and the frame.
- 7. A cabin as claimed in claim 4 in which said multiple glazed window unit is located in a window surround being restrained at its outer surface by an outer sheet of the cabin2and at its inner surface by releasable holding means, whereby the unit is removable.
- 8. A cabin as claimed in claim 7 in which the releasable holding means comprises a number of L section wedges which, in holding position, have one arm of the L latching with a latch of the cabin housing and the other arm of the L biassing the unit to hold it in said surround, each wedge being movable away from the latch to release the bias on the unit.
- 9. A cabin as claimed in claim 8 in which a handling tab is attached to the unit between at least one of the panes and the frame.
CLAIM SUPPORTED BY SUPPLEMENTARY DISCLOSURE - 10. A cabin according to claim 7 wherein said releasable holding means includes an L shaped member for seating against said surround and said inner surface, said L shaped member having an included angle greater than the included angle between said inner surface and surround whereby, upon fastening of said releasable holding means to said surround, said member is flexed to bias said outer surface toward said outer sheet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19598280A | 1980-10-14 | 1980-10-14 | |
| US195982 | 1980-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1138715A true CA1138715A (en) | 1983-01-04 |
Family
ID=22723629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000365751A Expired CA1138715A (en) | 1980-10-14 | 1980-11-28 | Framed dual pane window |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1138715A (en) |
-
1980
- 1980-11-28 CA CA000365751A patent/CA1138715A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |