AU595325B2

AU595325B2 - Double hung window

Info

Publication number: AU595325B2
Application number: AU73755/87A
Authority: AU
Inventors: Tony Lawrence Cirillo
Original assignee: ABSOLUTE CONST Pty Ltd
Current assignee: K SHUGG INDUSTRIES PTY Ltd
Priority date: 1986-06-04
Filing date: 1987-06-02
Publication date: 1990-03-29
Anticipated expiration: 2007-06-02
Also published as: AU7375587A

Description

COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952 COMPLETE SPECIFICATION (Original) FOR OFFICE USE Class Int. Class Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority: Related Art: Name of Applicant: Address of Applicant: SActual Inventor(s): 595325 This document contains the amendments made under Section 49 and is correct for printinti.

ABSOLUTE CONSTRUCTIONS PTY. LTD.

8 Bignell Road, Moorabbin 3189, Victoria, Australia TONY LAWRENCE CIRILLO Address for Service: DAVIES COLLISON, Patent Attorneys, 1 Little Collins Street, Melbourne, 3000.

Complete specification for the invention entitled: "DOUBLE HUNG WINDOW" The following statement is a full description of this invention, including the best method of performing it known to us -1l~ Ira-rr-:4 DOUBLE HUNG WINDOW a 0 o 0 0 0e 0 *0 9g 00 00 49 *0 0000 0* 0 This invention relates to double hung windows and has particular but not exclusive application in the construction of sashless double hung windows and window frames.

5 A known form of sashless double hung window is sashless only in the sense that sliding receiving channels for the glass are recessed within a larger inwardly flanged channel mounted to the window frame.

The inwardly flanged channels each carry a pair of sealing strips which engage the glass receiving channels for the purpose of minimising rattle. In practice, the construction of this window is quite complex and the problem of rattle is not entirely overcome. The substantial gap, of the order of between the panes is believed to contribute to the rattle and is also the source of a significant draught when the window is closed.

A feature of the above described window is that the panes are interconnected by a cord so that the panes counterbalance and move in opposite unison when either of them is raised or lowered. In this way, the 3 1 2 3 4 6 7 8 9 11 12 13 14 °o Ow 15 16 o l 17 'fit 18 19 S 20 21 22 23 24 25 26 27 28 29 4 31 32 33 two panes can be opened or closed simultaneously by near effortless movement of one pane. The counterbalancing feature requires a suspended pulley at either side and integral eyes or other appropriate attachment means on the glass receiving channels.

It is an object of this invention to provide an improved double hung window adaptable as a sashless window.

The invention accordingly provides, in one aspect, a double hung window frame comprising: means defining a pair of opposed elongate recesses; spacer means extending longitudinally of and dividing each recess and providing lateral sliding bearing surfaces for a pair of parallel panes when the latter are received in the recesses to either side of the spacer means; flexible to guide means at or near one end of at least one of said recesses; and elongate flexible tie means adapted to extend about the or each said guide means, the guide means being so positioned that, when the tie means is extended about the guide means and the panes are received in said recesses, the or each tie means defines two segments attached to the respective panes, in each case by being secured to a major face of the pane; whereby said panes move in opposite unison when one of them is moved along the recesses.

The invention further provides a double hung window comprising: a frame defining a pair of opposed elongate recesses; 34 36 insp.010,abso1ute.spe.3 I I 11 4 a pair of panes extending between and into said recesses, which panes are of L~o t thn thc -ro6ocic but are adapted when overlapped to close the space between the recesses; spacer means extending longitudinally of and dividing each recess by separating said panes and providing lateral sliding bearing surfaces for the panes when they are moved longitudinally of the recesses; guide means at or near one end of at least one of said recesses; and elongate flexible tie means extending about the or each guide means, so defining two segments of the tie means attached to the respective panes, in each 15 case by being secured to a major face of the pane; fr whereby said panes move in opposite unison when one of them is moved along the recesses The tie means is preferably an elongate tape which in situ is substantially non-stretching in the longitudinal direction. A broad surface of the tape is advantageously adhered to the respective major face of the pane for substantially the full extent of the pane in the respective recess. Most preferably, the tapes are wholly within their respective recesses.

Each tape is preferably adhered to the pane, which is typically glass, by means providing adhesion which is sustained parallel to the pane under substantial load, for example the weight of the other pane, but is relatively easily broken normal to the pane so as to easily separate the tape from the pane when it is desired to replace or remove the pane or the tape.

Preferably, the tape segments afford substantial weatherproof sealing between the respective pane and an adjacent side of the recess, by being disposed in sliding contact with or close proximity to the side of the recess. To this end, each recess preferably includes opposed flat parallel sides.

The invention will now be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a partial horizontal cross section through one side of a sashless double hung timber window in accordance with the invention; Figure 2 is a cross section on the line 2-2 in o Figure 1; 15 Figure 3 is an enlargement of region A in Figure 9.

2; rt Figure 4 is a cross section on the line 4-4 in 0. Figure 2; Figures 5 and 6 are cross-sections similar to part of Figure 4 but depicting alternative C "arrangements for mounting each tape bearing of a C, I Cwindow in accordance with the invention, Figure 6 also including plan and end elevational views of the Sr bracket utilised; and Figure 7 is a partial horizontal cross-section through one side of a sashless double hung aluminium window in accordance with the invention.

tc The window 10 illustrated in Figures 1 to 4 includes a timber frame 12 and a pair of half glass panes 14, 16, for example of laminated or float glass.

At each side of the window, frame 12 includes a *t tc I: I Ii 6 standard window jamb 18 stepped to define a right angular vertically extending elongate recess 22.The recess is further closed by a staff bead 20 and thereby has flat sides 23a, 23b respectively provided by the jamb and the bead, and a flat base 24. Recess 22 extends from the head 11 of frame 12 to the sill 13.

Recess 22 is partially divided by an elongate plastics bead 26 which includes opposite side flanges 28, a forward smooth-surfaced rounded strip 30 and a rearward longitudinally ribbed strip 32. Bead 26 is driven into a suitable slot along the centre of recess base 24,the ribs on strip 32 serving to hold it in place. Panes 14, 16 extend into recess 22 to either 15 side of bead 26. The sides of strip 30 and the front edges of flanges 28 provide lateral substantially weatherproof sliding bearing surfaces for the glass panes, although the panes may not necessarily at all times be in firm engagement with these surfaces. Bead 28 ought therefore to be formed in nylon or some other suitable self-lubricating plastics material.

Panes 14, 16 are coupled within each recess 22 by a respective flat tape 40 which extends over an annular nylon bearing 42 adjacent the top of each recess, so defining two segments 44 of the tape which are attached to the respective panes 14, 16, in each case by being adhered to a major face of the pane at 41 over the whole length of the pane within each recess. The adhesive is selected to provide an adhesion between tape and glass which is sustained under load parallel to the glass, for example the 1 i i ill i: 7 weight of the other pane, but relatively easily broken normal to the pane so that the tape may be easily separated from the glass when it is desired to replace or remove either the tape or the glass. A suitable tape comprises multiple longitudinal strands and filaments embedded in a fabric or plastics film.

Multiple transverse strands or filaments are also preferably embedded in the fabric or film, thus forming a rectangular reinforcing mesh.

The dimensions of recess 22 are arranged such that tape segments 44 also provide weatherproof sealing means between the panes and the flat sides 4 23a, 23b of the channel. The tapes are preferably in light engagement with sides 23a, 23b but this is not 15 necessarily required for adequate weatherproofing.

4* 8o° Bearing 42 includes end flanges 43 for retaining tape 40 in place and preferably has a convex bearing t 0surface 45 t6 maintain maximum central surface contact with the tape while reducing the risk that the tape will enwrap and become tangled upon the bearing.

F Bearing 42 has a countersunk bore through which a t lscrew 46 may be passed to fasten the bearing to the respective jamb. At least one and perhaps both of panes 14, 16 is cut away at each top corner to define rectangular notches 48 for bearings 42 and so allow the pane to contact the window head 11 in its raised position.

Alternative arrangements for mounting bearing 42 i are shown in Figures 5 and 6. The arrangement of Figure 5 includes a sheet metal bracket 50 which is typically secured flush in the face of the jamb 18'.

i.

-Is 8 Bearing 42' includes end flanges 43', a convex bearing surface 45', and a bore 47 as before, but, in this case, bore 47 receives a bush 52. Bush 52 is rivetted in place at 53 in an aperture 51 in bracket 50 and itself receives a screw 46' threadingly fastened into the jamb as shown. The head of screw 46' engages a washer 54.

The arrangement of Figure 6 includes an inverted U-section bracket 50" with parallel segments 50a, which mount a pin 46" for bearing. 42". Bracket further comprises a depending leg 50c extending segment 50a, fastened flush into jamb 18" by screws and a laterally outstanding arm secured flush into window head 11" by screw 61. The bearing is thereby recessed between the jamb and head as shown.

These alternative arrangements are well-suited to situations whcse greater bearing strength is required.

It will be appreciated that the two panes move in opposite unison when either of them is lifted or raised by virtue of their interconnection by tape In this way, the lifting of the bottom pane, for example, will cause both panes to open to a matching central position. Indeed, the two panes can be opened or closed simultaneously by near effortless movement of one pane. The length of the panes is chosen so that they just overlap in the closed condition of the window. Because the panes are not mounted in sliding receiving channels but are freely supported between bead 26 and the sides of recess 22, their spacing can be kept very small, of the order of 2mm, and any draught almost eliminated. Moreover, the weatherproof ~0~ it: i 9 sealing and bearing surfaces provided at beadr 26 and between tape segment 40 and the sides 23a, 23b of recess 22 ensure that there is substantially no rattle in the assembly, even in a high wind. This desirable feature is also facilitated by the minimum number of separate parts which moreover render the window economical in construction and very easy to install.

It will be understood that the invention is equally applicable to metal frames and in particular to aluminium section frames. Figure 7 depicts portion of an aluminium window 10' in accordance with the invention. In this drawing, like reference numerals indicate like parts with respect to the embodiment of Oo DFigures 1 to 4. At each side, the window frame is S 15 defined by four aluminium extrusions: an L-section channel 18a and a complementary closure strip 18b snap-fastened together to define a jamb 18', a box channel-"?0' and a T-section divider strip 26'. Box channel 20' and jamb 18' snap fit together as shown, by engagement of an inwardly displaced flange 70 on the box channel with a groove 71 on the jamb and by mating of a corner bead 72 on the jamb with a shallow trough 73 on the box channel, to define recess 22' Recess 22' is divided by T-section strip 26', which has rear lugs 75 to snap behind a rib 76 on jamb 18' and thereby firmly position the strip. One edge of the strip seats in an undercut groove 78 in a side face of channel 18'.

Glass panes 14', 16' firmly fit into recess 22' to either side of T-section strip 26'. The sides of the projecting web 30' of strip 26' and the outwardly exposed faces 80 of the head of the T provide substantially weatherproof sliding bearing surfaces for the glass panes. Tape 40' is adhered to both panes within each of the two recesses 22' in a similar manner to the first embodiment.

The invention is in no way limited to the particular materials described. Bearing 42 may alternatively be machined from brass or any other suitable material and the beads 26 and tape 40 may comprise any commercial or specially made items which achieve the objects of the invention.

ft I I ti ~d-x _Il

Claims

2. 3 4 6 7 8 9 11 12 13 14 16 17 L t 18 4 i 19 21 22 23 24 r t I t 4 4 4 25 26 27 28 29 c tr 131 1. A double hung window frame comprising: means defining a pair of opposed elongate recesses; spacer means extending longitudinally of and dividing each recess and providing lateral sliding bearing surfaces for a pair of parallel panes when the latter are received in the recesses to either side of the spacer means; flexible tie guide means at or near one end of at least one of said recesses; and elongate flexible tie means adapted to extend about the or each said guide means, the guide means being so positioned that, when the tie means is extended about the guide means and the panes are received in said recesses, the or each tie means defines two segments attached to the respective panes, in each case by being secured to a major face of the pane; whereby said panes move in opposite unison when one of them is moved along the recesses. 2. A window frame according to claim 1 wherein the tie means is an elongate tape which in situ is substantially non-stretching in the longitudinal direction.
3. A window frame according to claim 2 wherein the broad surface of the tape is adhered to the respective major face of the pane for substantially the full extent of the pane in the respective recess. 900117,gjnspe.010.absolute.spe,l1
4. A window frame according to claim 2 or 3 wherein the tapes are wholly within their respective recesses. A window frame according to any preceding claim wherein each tape is adhered to the pane by means providing adhesion which is sustained parallel to the pane under substantial load, but is relatively easily broken normal to the pane so as to easily separate the tape from the pane.
6. A window frame according to any preceding claim wherein the tape segments afford substantial J weatherproof sealing between the respective pane and an adjacent side of the recess, by being disposed in 4 sliding contact with or close proximity to the side of the recess.
7. A double hung window comprisingt a frame defining a pair of opposed elongate recesses; a pair of panes extending between and into said recesses, which panes are of lesser oxtent G th&t-tSn rec--ss but arz adapted when overlapped to close the space between the recesses; spacer means extending longitudinally of and dividing each recess by separating said panes and providing lateral sliding bearing surfaces for the panes when they are moved longitudinally of the recesses; guide means at or near one end of at least one of said recesses; and -6 13 elongate flexible tie means extending about the or each guide means, so defining two segments of the tie means attached to the respective panes, in each case by being secured to a major face of the pane; whereby said panes move in opposite unison when one of them is moved along the recesses.
8. A window according to claim 7 wherein the tie means is an elongate tape which in situ is substantially non-stretching in the longitudinal direction.
9. A window according to claim 8 wherein the broad surface of the tape is adhered to the respective major face of the pane for substantially the full extent of the pane in the respective recess. A window according to claim 8 or 9 wherein the tapes are wholly within their respective recesses.
11. A window according to any one of claims 7 to wherein each tape is adhered to the pane by means providing adhesion which is sustained parallel to the pane under substantial load, but is relatively easily broken normal to the pane so as to easily separate the tape from the pane.
12. A window according to any one of claims 7 to 11 wherein the tape segments afford substantial weatherproof sealing between the respective pane and an adjacent side of the recess, by being disposed in 4 f' t Ct .4 44r 44 4 *s S 5 c 44CC 44 14 8 9 11 12 13 14 16 17 18 19 21 22 23 l 24 2 S 26 27 28 i 29 6 C 6 31 32 33 34 sliding contact with or close proximity to the side of the recess.
13. A double hung window or window frame substantially as hereinbefore described with reference to the accompanying drawings.
14. A window frame according to any one of claims 1 to 6 wherein the or each guide means is a single annular bearing substantially centered with respect to said spacer means.
15. A window frame according to any one of claims 1 to 6 wherein the or each guide means is an annular bearing disposed past the end of the spacer means with respect to the longitudinal direction of the spacer means. Dated this 17th day of January 1990. ABSOLUTE CONSTRUCTIONS PTY LTD By its Patent Attorneys Davies Collison 900117,gjnspe.010.absolute.spe.14