CA1142034A - Safety lock for sliding sash window - Google Patents
Safety lock for sliding sash windowInfo
- Publication number
- CA1142034A CA1142034A CA000376861A CA376861A CA1142034A CA 1142034 A CA1142034 A CA 1142034A CA 000376861 A CA000376861 A CA 000376861A CA 376861 A CA376861 A CA 376861A CA 1142034 A CA1142034 A CA 1142034A
- Authority
- CA
- Canada
- Prior art keywords
- sash
- sliding
- lock pin
- corner
- detent
- 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
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/08—Locks or fastenings for special use for sliding wings
- E05B65/0864—Locks or fastenings for special use for sliding wings the bolts sliding perpendicular to the wings
Landscapes
- Wing Frames And Configurations (AREA)
Abstract
A B S T R A C T
A safety lock is disclosed for a sliding sash window.
The lock allows a sliding sash window to be locked in a partially open position but prevents illegal access through a window. The safety lock is for a window with an inner sash and an outer sash and comprises a sliding lock pin located in one corner of the inner sliding sash on a surface normal to the direction of move-ment of the sliding sash, a corner section at the corner of the inner sliding sash, having a passage for the sliding lock pin to move into a locked position with the outer sash, and a a detent located in the outer sash to engage with the sliding lock pin when in the locked position, the detent positioned so that the inner sash may move a predetermined distance relative to the outer sash before the lock pin engages the detent.
A safety lock is disclosed for a sliding sash window.
The lock allows a sliding sash window to be locked in a partially open position but prevents illegal access through a window. The safety lock is for a window with an inner sash and an outer sash and comprises a sliding lock pin located in one corner of the inner sliding sash on a surface normal to the direction of move-ment of the sliding sash, a corner section at the corner of the inner sliding sash, having a passage for the sliding lock pin to move into a locked position with the outer sash, and a a detent located in the outer sash to engage with the sliding lock pin when in the locked position, the detent positioned so that the inner sash may move a predetermined distance relative to the outer sash before the lock pin engages the detent.
Description
3~
This invention relates to sliding sash windows.
More particularly this invention relates to a sa~ety lock to allow a sliding sash window to be locked in the partially open position.
The majority of sliding sash windows made today have metal frames, generally formed from extruded aluminum sections Sliding sash window assemblies have an inner sash and an outer sash. In some cases when a double window is provided there are two inner sashes and two outer sashes together with a :ely screen.
All the sashes are removable as well as the fly screen which slides in a track in the aluminum section to leave a completely open window i~ desired. Removable sashes enables the windows and ~rames to be cleaned. Vertical sliding sash windows are generally provided with spring counter-balances at the sides of each sash to hold the sash in any position in the window frame.
Because the sashes are removable, it is necessary to have a system for releasing these spring countsr-balances from the sash before the sash is removed from the frame Most sashes are provided with a lock which either locks the sash to the frame, or alternatively, locks two sashes to-gether, when both sashes are ~ully closed. With a vertical sliding sash window having spring counter-balances, it is difficult to provide a lock at the side to lock the sash to the frame and, therefore, the sash is either locked in the closed position to the top or bottom o~ the frame, or the two sashes are locked together when closed. There is no room for locks at the side o~ the sash because the spring counter-balances take up the available space.
The present invention provides a simple safety lock which allows one sash to be opened a small amount relative to the other sash to provide ventilation into a room The safety lock of the present invention provides either the outer sash , .
- 1 _ ""~
~Zl33~
to be opened, or the inner sash to be opened, or alternatively, both sashes to be opened a small amOUDt The opening is sufficiently small to prevent access into a room from outside.
Thus a safety feature is provided that ventilation can be obtained in a room without leaving a window fully open, but the window can be locked to prevent entry from outside.
Furthermore, the present invention provides a safety lock :Eor a vertical sliding sash window, the lock being mounted in one of the top corners of the lower inner sash in a location where it does not interfere with the spring counter-balance and engaging with a detent provided on the frame of the upper sash.
The safety lock has a corner section having a lip to engage the spring counter-balance for the inner sash, but allows the counter~
balance to be disconnected if it is desired to remove the sash from the frame. Only one sa~ety lock is required, thus each sash may be removed from the frame after both spring counter-balances have been disconnected from the sash.
The present invention provides a safety lock for a sliding sash window, having an inner sash and an outer sash, comprising a sliding lock pin located in one corner of the inner sliding sash on a surface normal to the direction of movement of the sliding sash, a corner section at the corner of the inner sliding sash, having a passage for the sliding lock pin to move into a locked position with the outer sash, and a detent located in the outer sash to engage with the sliding lock pin when in the locked position, the detent positioned so that the inner sash may move a predetermined distance relative to the out~r sash before the lock pin engages the detent In drawings which illustrate embodiments o~ the present invention, Fig. 1 is an elevational view of a vertical sliding sash window.
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Fig, 2 is a horizontal section taken at line 2~2 of ~ig. 1.
Fig. 3 is a vertical section taken at line 3-3 of Fig. 1.
Fig. 4 is a partial vertical section taken at line 4-4 of Fig. 3.
Fig. 5 is a partial vertical section taken at line 5-5 of Fig. 2.
Referring now to the drawings, Fig. 1 illustrates a window frame 10 for a vertical sliding sash window, with an inner lower sash 11 and an outer upper sash 12, One of the top corners of the lower sash 11 has a safety lock 13 according to the present invention, and a detent 14 is provided in the frame of the upper sash 12 to mate with the sliding lock 13.
As shown in Fig. 2 the lower sash 11 has spring counter-balances 15 on each side, The upper sash 12 also has spring counter-balances 16 positioned at each side of the sash. The counter-balances 15 and 16 fit into U-shaped channels 17 which form frames for the sashes. As illustrated more clearly in ~O Fig. 4 the spring counter-balance 15 is telescopic in exterior appearance, having a spring therein, fits into a lip at the top of the U-shaped channel 17 and at the base the counter-balance is attached to the frame 10. In all standard sliding sash windows provision is made to lock the spring counter-balance 15 to the frame 10 so that the sash may be raised free from the spring counter-balances, moved to one side in the fIame and sufficient room is available for the sash to be pulled out of the frame at the other side and then be completely removed ~rom the frame. As may be seen in Fig. 3, whereas the side~ of each sash is a U-shaped channel 17, the top and bottom members of each sash are square section members 18 which mate with the U-shaped channel 17 to form a sash frame, -- 3 ~
As illustrated in more detail in Figs. 4 and 5 the safety lock 13 includes a sliding lock pin 20 having an operating end 21 adapted to be pushed by an individual and an engagement end 22 slightly cup-shaped to engage with the detent 14, A
keeper plate 23 on the base o~ the locking pin 20 restricts the movement of the locking pin in the sash frame, A corner section 25 fits in the top corner of the sash ~rame, at one side but not both sides of the lower sash 11, The corner section 25 has a pass-age 26 for locating the sliding lock pin 20. A spring clip 27, presses against the lock pin 20 so that it remains in any position in the passage 26, The corner piece 25 i5 formed integrally into the corner where the square section 18 and U-shaped channel 17 join, A lip 28 is provided beneath the passage 26 supporting the lock pin 20, into which fits an end 29 of the spring counter-balance 15, A guide surface 30 also formed in the corner section 25 retains the spring counter-balance 15 in its desired position. Thus the spring counter-balance at its top rests within the U-shaped channel 17 of the sash, The detent 14 is cut in the side of the U-shaped channel 17. Nothing protrudes inside the U-shaped channel 17 to interfere with the spring counter-balance 16, A portion is pushed out sufficiently far to engage the cup portion 22 of the lock pin 20, but not suf~iciently far that it interfers with the movement between the lower sash 11 and the upper sash 12, The location of the detent 14 is such that the window may open approximately 6". This distance may be varied depending on particular requirements. 6" is believed to be a good distance as it is insufficient for anyone to climb in through a window and yet does permit ventilation, The U-shaped channel 17 and the square section 18 forming the sash are pre~`erably made of extruded aluminum shapes and are standard for both upper and lower sashes. Furthermore, the frame sections 10 are also standard extruded aluminum sections. Whereas single glazing is shown in the drawings, it will be apparent that double glazing can equally well be incorporated.
In operation with the locking pin 20 pulled out to its fullest extent, the lower sash 11 and upper sash 12 have free movement without any inter~erence, In order to engage the sliding lock pin 20, the upper sash 12 is moved to its uppermost position.
The lower sash 11 is moved to its lowermost position. The lock pin 20 is then pushed in until the cup-shaped portion 22 is resting against the surface of the U-shaped channel 17 of the upper sash 12. The lower sash 11 may then be raised until the cup-shaped portion 22 of the lock pin 2Q engages with the detent 14, This provides an opening beneath the lower sash 11. If desired, the upper sash 12 may be moved downwards. This moves the lower sash 11 because the force will be transferred through the detent 14 and the lock pin 20, Openings may remain at the top and the bottom. Alternatively, the upper sash 12 may be moved down until the bottom of the lower sash 11 touches the frame. This provides an open space at the top o~ the upper sash 12 rather than at the bottom of the lower sash 11.
To remove the lower sash 11 from the frame 10 it is necessary to first disconnect the two spring counter-balances 15 at each side of the sash. This is done in a well known fashion.
Locking pins (not shown) are provided to hold the spri~g counter-balances in the compressed position. The lower sash 11 is then raised and the sash moved to the left away from the safety lock 13, until the side of the lower sash 11 is clear o~
the ~rame 10. This side of the sash is then pulled forward and the sash can be completely removed from the frame. It is preierred not to have safety locks on both sides of the sash, because if that occurs then it is not possible to remove the .
This invention relates to sliding sash windows.
More particularly this invention relates to a sa~ety lock to allow a sliding sash window to be locked in the partially open position.
The majority of sliding sash windows made today have metal frames, generally formed from extruded aluminum sections Sliding sash window assemblies have an inner sash and an outer sash. In some cases when a double window is provided there are two inner sashes and two outer sashes together with a :ely screen.
All the sashes are removable as well as the fly screen which slides in a track in the aluminum section to leave a completely open window i~ desired. Removable sashes enables the windows and ~rames to be cleaned. Vertical sliding sash windows are generally provided with spring counter-balances at the sides of each sash to hold the sash in any position in the window frame.
Because the sashes are removable, it is necessary to have a system for releasing these spring countsr-balances from the sash before the sash is removed from the frame Most sashes are provided with a lock which either locks the sash to the frame, or alternatively, locks two sashes to-gether, when both sashes are ~ully closed. With a vertical sliding sash window having spring counter-balances, it is difficult to provide a lock at the side to lock the sash to the frame and, therefore, the sash is either locked in the closed position to the top or bottom o~ the frame, or the two sashes are locked together when closed. There is no room for locks at the side o~ the sash because the spring counter-balances take up the available space.
The present invention provides a simple safety lock which allows one sash to be opened a small amount relative to the other sash to provide ventilation into a room The safety lock of the present invention provides either the outer sash , .
- 1 _ ""~
~Zl33~
to be opened, or the inner sash to be opened, or alternatively, both sashes to be opened a small amOUDt The opening is sufficiently small to prevent access into a room from outside.
Thus a safety feature is provided that ventilation can be obtained in a room without leaving a window fully open, but the window can be locked to prevent entry from outside.
Furthermore, the present invention provides a safety lock :Eor a vertical sliding sash window, the lock being mounted in one of the top corners of the lower inner sash in a location where it does not interfere with the spring counter-balance and engaging with a detent provided on the frame of the upper sash.
The safety lock has a corner section having a lip to engage the spring counter-balance for the inner sash, but allows the counter~
balance to be disconnected if it is desired to remove the sash from the frame. Only one sa~ety lock is required, thus each sash may be removed from the frame after both spring counter-balances have been disconnected from the sash.
The present invention provides a safety lock for a sliding sash window, having an inner sash and an outer sash, comprising a sliding lock pin located in one corner of the inner sliding sash on a surface normal to the direction of movement of the sliding sash, a corner section at the corner of the inner sliding sash, having a passage for the sliding lock pin to move into a locked position with the outer sash, and a detent located in the outer sash to engage with the sliding lock pin when in the locked position, the detent positioned so that the inner sash may move a predetermined distance relative to the out~r sash before the lock pin engages the detent In drawings which illustrate embodiments o~ the present invention, Fig. 1 is an elevational view of a vertical sliding sash window.
3~L
Fig, 2 is a horizontal section taken at line 2~2 of ~ig. 1.
Fig. 3 is a vertical section taken at line 3-3 of Fig. 1.
Fig. 4 is a partial vertical section taken at line 4-4 of Fig. 3.
Fig. 5 is a partial vertical section taken at line 5-5 of Fig. 2.
Referring now to the drawings, Fig. 1 illustrates a window frame 10 for a vertical sliding sash window, with an inner lower sash 11 and an outer upper sash 12, One of the top corners of the lower sash 11 has a safety lock 13 according to the present invention, and a detent 14 is provided in the frame of the upper sash 12 to mate with the sliding lock 13.
As shown in Fig. 2 the lower sash 11 has spring counter-balances 15 on each side, The upper sash 12 also has spring counter-balances 16 positioned at each side of the sash. The counter-balances 15 and 16 fit into U-shaped channels 17 which form frames for the sashes. As illustrated more clearly in ~O Fig. 4 the spring counter-balance 15 is telescopic in exterior appearance, having a spring therein, fits into a lip at the top of the U-shaped channel 17 and at the base the counter-balance is attached to the frame 10. In all standard sliding sash windows provision is made to lock the spring counter-balance 15 to the frame 10 so that the sash may be raised free from the spring counter-balances, moved to one side in the fIame and sufficient room is available for the sash to be pulled out of the frame at the other side and then be completely removed ~rom the frame. As may be seen in Fig. 3, whereas the side~ of each sash is a U-shaped channel 17, the top and bottom members of each sash are square section members 18 which mate with the U-shaped channel 17 to form a sash frame, -- 3 ~
As illustrated in more detail in Figs. 4 and 5 the safety lock 13 includes a sliding lock pin 20 having an operating end 21 adapted to be pushed by an individual and an engagement end 22 slightly cup-shaped to engage with the detent 14, A
keeper plate 23 on the base o~ the locking pin 20 restricts the movement of the locking pin in the sash frame, A corner section 25 fits in the top corner of the sash ~rame, at one side but not both sides of the lower sash 11, The corner section 25 has a pass-age 26 for locating the sliding lock pin 20. A spring clip 27, presses against the lock pin 20 so that it remains in any position in the passage 26, The corner piece 25 i5 formed integrally into the corner where the square section 18 and U-shaped channel 17 join, A lip 28 is provided beneath the passage 26 supporting the lock pin 20, into which fits an end 29 of the spring counter-balance 15, A guide surface 30 also formed in the corner section 25 retains the spring counter-balance 15 in its desired position. Thus the spring counter-balance at its top rests within the U-shaped channel 17 of the sash, The detent 14 is cut in the side of the U-shaped channel 17. Nothing protrudes inside the U-shaped channel 17 to interfere with the spring counter-balance 16, A portion is pushed out sufficiently far to engage the cup portion 22 of the lock pin 20, but not suf~iciently far that it interfers with the movement between the lower sash 11 and the upper sash 12, The location of the detent 14 is such that the window may open approximately 6". This distance may be varied depending on particular requirements. 6" is believed to be a good distance as it is insufficient for anyone to climb in through a window and yet does permit ventilation, The U-shaped channel 17 and the square section 18 forming the sash are pre~`erably made of extruded aluminum shapes and are standard for both upper and lower sashes. Furthermore, the frame sections 10 are also standard extruded aluminum sections. Whereas single glazing is shown in the drawings, it will be apparent that double glazing can equally well be incorporated.
In operation with the locking pin 20 pulled out to its fullest extent, the lower sash 11 and upper sash 12 have free movement without any inter~erence, In order to engage the sliding lock pin 20, the upper sash 12 is moved to its uppermost position.
The lower sash 11 is moved to its lowermost position. The lock pin 20 is then pushed in until the cup-shaped portion 22 is resting against the surface of the U-shaped channel 17 of the upper sash 12. The lower sash 11 may then be raised until the cup-shaped portion 22 of the lock pin 2Q engages with the detent 14, This provides an opening beneath the lower sash 11. If desired, the upper sash 12 may be moved downwards. This moves the lower sash 11 because the force will be transferred through the detent 14 and the lock pin 20, Openings may remain at the top and the bottom. Alternatively, the upper sash 12 may be moved down until the bottom of the lower sash 11 touches the frame. This provides an open space at the top o~ the upper sash 12 rather than at the bottom of the lower sash 11.
To remove the lower sash 11 from the frame 10 it is necessary to first disconnect the two spring counter-balances 15 at each side of the sash. This is done in a well known fashion.
Locking pins (not shown) are provided to hold the spri~g counter-balances in the compressed position. The lower sash 11 is then raised and the sash moved to the left away from the safety lock 13, until the side of the lower sash 11 is clear o~
the ~rame 10. This side of the sash is then pulled forward and the sash can be completely removed from the frame. It is preierred not to have safety locks on both sides of the sash, because if that occurs then it is not possible to remove the .
2~
sash from the frame in the manner described, because the lock pin 20 prevents the sash at one side being pushed into the frame, Various changes may be made to this invention without departing from the scope thereof, The shape o~ the sliding lock pin 20 may be changed, rather than a sliding lock pin it could be a swivel lock pin, rather than a detent in the side of the sash frame a hole could be provided for a permanent lock, The important feature being that the safety lock is provided in such a manner that it does not interfere with the operation of a sliding sash window, Neither does it interfere with the operation of the spring counter-balan~e in both the upper sash and lower sash, The safety lock of the present invention may be applied to horizontal sliding sash windows in the same manner as vertical sash windows, It may also be applied to sliding doors in the same manner, In the case of horizontal sliding windows or doors there is generally not a spring counter-balance provided, so the space requirement is not so much of a problem, however, the present concept of a safety lock provides the standard sections of sash or door frame without requiring holes to be drilled for insertion of locks, etc.
sash from the frame in the manner described, because the lock pin 20 prevents the sash at one side being pushed into the frame, Various changes may be made to this invention without departing from the scope thereof, The shape o~ the sliding lock pin 20 may be changed, rather than a sliding lock pin it could be a swivel lock pin, rather than a detent in the side of the sash frame a hole could be provided for a permanent lock, The important feature being that the safety lock is provided in such a manner that it does not interfere with the operation of a sliding sash window, Neither does it interfere with the operation of the spring counter-balan~e in both the upper sash and lower sash, The safety lock of the present invention may be applied to horizontal sliding sash windows in the same manner as vertical sash windows, It may also be applied to sliding doors in the same manner, In the case of horizontal sliding windows or doors there is generally not a spring counter-balance provided, so the space requirement is not so much of a problem, however, the present concept of a safety lock provides the standard sections of sash or door frame without requiring holes to be drilled for insertion of locks, etc.
Claims (4)
1. A safety lock for a sliding sash window, having an inner sash and an outer sash, comprising, a sliding lock pin located in one corner of the inner sliding sash on a surface normal to the direction of movement of the sliding sash, a corner section at the corner of the inner sliding sash, having a passage for the sliding lock pin to move into a locked position with the outer sash, and a detent located in the outer sash to engage with the sliding lock pin when in the locked position, the detent positioned so that the inner sash may move a predetermined distance relative to the outer sash before the lock pin engages the detent.
2. The safety lock according to claim 1 wherein the inner and outer sashes are made of a metal section, and where-in the detent in the outer frame is pressed out of the metal section.
3. The safety lock according to claim 2 when applied to a vertical sliding sash window having a removable spring counter-balance therein, wherein the corner section is located at a top corner of the inner sash and has a lip to engage and hold the spring counter-balance or the inner sash in place.
4. The safety lock according to claim 3 wherein the sliding lock pin is formed of an extruded metal section, and the corner section is formed from another extruded metal section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000376861A CA1142034A (en) | 1981-05-05 | 1981-05-05 | Safety lock for sliding sash window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000376861A CA1142034A (en) | 1981-05-05 | 1981-05-05 | Safety lock for sliding sash window |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1142034A true CA1142034A (en) | 1983-03-01 |
Family
ID=4119886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000376861A Expired CA1142034A (en) | 1981-05-05 | 1981-05-05 | Safety lock for sliding sash window |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1142034A (en) |
-
1981
- 1981-05-05 CA CA000376861A patent/CA1142034A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |