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Publication numberUS3399490 A
Publication typeGrant
Publication dateSep 3, 1968
Filing dateAug 4, 1966
Priority dateAug 4, 1966
Publication numberUS 3399490 A, US 3399490A, US-A-3399490, US3399490 A, US3399490A
InventorsDonald M Hettinger
Original AssigneeWeatherproof Products Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tilt-out sash window
US 3399490 A
Abstract  available in
Images(4)
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Claims  available in
Description  (OCR text may contain errors)

p 3, 1968 o. M. HETTINGER 3,399,490

TILT-OUT SASH WINDOW Filed Aug. 4, 1966 4 Sheets-Sheet 1 INVENTOR.

Donald M M? Hinge! r ATTORNEY Sept. 3, 1968 Filed Aug. 4, 1966 D. M. HETTINGER TILT-OUT SASH WINDOW 4 Sheets-$heet 2 INVENTOR.

ATTORNEY United States Patent-"O 3,399,490 TILT-OUT SASH WINDOW Donald M. Hettinger, Kansas City, Mo., assignor to The Weatherproof Products Corporation, Kansas City, Mo., a corporation of Missouri 7 Filed Aug. 4, 1966, Ser. No. 570,285

15 Claims. .(Cl. 49- 414) This invention relates towindow sash that are slidable in a window frameto and from open and closed position.

Such sash are usually counterbalanced, for example, by coil springs having upper ends fixed relative'to the frame and lower ends fixed relative to the sash, so that the springs are loaded as the sash are pulled downwardly in the frame to aid in lifting the weight of the sash when movement of the sash is reversed.' f'

Often the location of such window's makes it difficult to wash their outer surfaces. Various schemes have been de vised to tilt and/or remove the sash to make the outer sides accessible, but in such schemes provision has to be made for weather-seal of the sash in the frame, balance means for counter balancing weight of the sash, and means for connecting and disconnecting the sash from the balancing means. It has been the practice to mount the sash in spring biased guides within the frame, and to use balance means in the form of coil springs connected at their upper ends with the guides and at their lower ends to the sash. Movement of the sash to the lower portion of the window frame for easy removal loads the balance springs and makes it difiicult to release the sash and at the same time hold the springs in stretched condition until the sash are ready to be reinserted in the'frame. The stored-up action in the springs is held by the guides, but due to the inherent resiliency thereof in making weatherseals with the sash, it has been difficult to devise a clamp that would grip the guides with snflicient force to prevent slipping under, action of the springs; Also, thegrip ping forces damage the guides so that they are ineffective for their intended purpose. H To facilitate removalof the sash, various meanshave been provided to automatically disconnect and reconnect the sash with theclamp mean'sfwhile the sash arein'the guides, but such automatic means does not'effec't'a positive connection between the sash and the balance springs. This difficulty has been overcome in' part by actuating the clamp by tilting the sash into and out of the frame, but I here again there is no positive connection between the sash and the clamp means.

Another difficulty is that the parts comprising the clamp means and their connection with the sash must be small, in order to operate in the available space. Consequently,

the parts are fragile and the connections insecure under continuous use. It has been suggested that the parts of the clamp means and the connection with the sash be' made of one of the tough and wear-resistant plastics, such as nylon, but it is still difficult to maintain an adequate'g'rip', particularly on windows requiring large sash size and sash having double panes for insulating purposes.

With the above in mind, the principal object of the present invention is to provide guides and balances for tilt.- out' sash that overcome present difficulties by the provision of clamping means which include slides connected with the lower ends of the balance springs and slidable within the weather-seals of the sash guides, and trunnions rotatably mounted within the slides and having faces which cooperate with faces on the slides to grip parts of the guides therebetween with a squeezing pressure, as distinguished from prior devices wherein the locking pressure is exertedby pushing forces between opposite parts of the guides.

Other objects of the invention are to provide for actuation of the clamp means by tilting the sash while main- "ice taining a positive'latch connection with the sash that is manually releasable from the sash only after the clamping means has been securely. gripped to the guides; to provide a guide wherein the part to be gripped is inherently strong by reason of its cross-sectional shape and which provides a track engaging in grooves in side edges ofthe sash for retention of the sash to slide in theframe; to provide a cross-sectional shape of the guidetrack to form cam surfaces by which the guides are thrust back into grooves of the window frame when pulling out and tilting the sash; to provide slides having trunnions oscillatable in the slides by means of lever arms of substantial length and which are latched to the sash; and to provide a structure wherein the parts, including the guides, slides, trunnions, and actuating levers may all be made of resilient plastic, such as nylon or the equivalent, to effect longer wear and stronger parts, as well as a positive gripping action when holding the springs in stretched position.

In accomplishing these and other objects of the invention as hereinafter pointed out, I have provided improved structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

FIG. 1 is a perspective view of a window assembly constructed in accordance with the present invention, and showing parts of the window frame and casings broken away to better illustrate the sash guides, and with the lower sash tilted inwardly of the building, and particularly showing one of the levers by which the sash is connected and disconnected for easy removal thereof, the uper sash being shown in slightly lowered position.

FIG. 2 is a vertical section through one side of the window frame, weather-seal, guide and sash, and particularly illustrating the relation of the parts'composing the connections between the sash and balance springs.

FIG. 3 is a similar section, but showing the lower sash tilted on its trunnions, and in position for release of the levers from latched engagement with the sash to permit removal of the sash from the frame.

' FIG. 4 is a section similar to FIG. 3, but illustrating release of the actuating lever from latch engagement.

FIG. 5 is a similar section, showing the sash being withdrawn from the lever.

FIG. 6 is a perspective view of the lower end of a balance spring, a slide block, trunnion, and actuating lever, shown in disassembled, spaced relation.

FIG. 7 is a perspective view of the sash fixture with which the actuating lever is latched to the sash.

FIG. 8 is a perspective view of the parts shown in FIG. 6, in assembled relation as they appear when operating in the channel of the sash guide.

FIG. 9 is a perspective view of the parts shown in FIG. 8, with the actuating lever in the position it assurnes on tilting of the sash.

FIG. 10 is a horizontal section through one side of the window frame, similar to FIG. 2, and showing the springs for biasing the sash guide against the side edges of the sash for maintaining the weather-seal, the lower sash being shown in full lines and the upper in dotted lines.

FIG. 11 is a fragmentary vertical section through the upper end of one of the sash guides, showing one of the brackets for retaining the guide in the frame and the manner of anchoring the upper end of the balance spring.

FIG. 12 is a perspective view of one of the fixtures for retaining the sash guide in the window frame.

FIG. 13 is a fragmentary portion of one of the sash, illustrating the fixture for establishing latching engagement of the actuating lever with the sash.

Referring more in detail to the drawings:

1 designates a window frame having double-hung tiltout sash 2 and 3. The frame 1 includes side 'jambs 4 3 and 5, a header jamb 6, and a sill 7. The side jambs 4 and 5 are constructed in a manner to have faces 8 inset from front side faces 9 and 10 to provide vertical pockets or recesses 11 which have side faces 12 and 13 to contain guide and weather-seal assemblies 14 and 15 therebetween.

The assemblies each include a resilient guide and weather-seal strip 16, preferably formed of tough, Wearresistant plastic material having some resiliency, such as polyvinyl chloride or the equivalent. Each strip includes a front or face portion 17 extending across the front of the recesses 11 and having inturned side flanges 18 and 19 slidably engaging the side faces 12 and 13 of the jambs. Interposed within the portions of the front 17 are spaced apart channels 20 and 21, each comprising a pair of flange portions 22 and 23 extending inwardly from the web on the respective sides of longitudinal slots 24 and 25 that are provided in the front 17. The flange portions 22 and 23 are interconnected at their inner edge by webs 26 to form guide channels 27 having open fronts by reason of the slots 24 and 25. Connected with the front 17 at the respective sides of each slot 24 and 25 and extending forwardly therefrom are sash guide rails 30 and 31 having inner concave and outer convex faces 32 and 33. The rails 30 and 31 project over the open fronts 24 and 25 of the channels 20 and 21 and are spaced apart to provide longitudinal ways 34 (FIG. 10) therebetween.

The sash 2 and 3 have grooves 36 in the side edges thereof to accommodate therein the rails 30 and 31 so that the side edges 37 and 38 of the sash grooves slidably engage outer faces of the rails, as shown in FIGS. 2 and 10, to retain the sash in sliding position. Thus the rails 30 and 31 are normally depended upon to prevent lateral displacement of the sash in the frame. With this arrangement, the sash 2 and 3 are no wider than the space between the inner and outer faces 9 and 10 at the respective opposite sides of the frame, so that the sash may tilt into and out of the frame and be removed, as later to be described.

Spaced from the inner flange portions 22 and 23 of the channels are flanges 39 and 40 to provide grooves 41 for anchoring expandable sealing strips 42 to form seals between the faces 8 of the jamb and the webs 26 and 27 of the guide channels, as best shown in FIGS. 2 and 10. The sealing strips 42 are readily available on the market, and specifically form no part of the present invention.

In order to bias the assemblies 14 and 15 in sealing contact with the side edges of the sash, the space between the flanges 39 and 40' accommodates therein upper and lower conical springs 43 and 44 that are retained by ribs 45 on the facing sides of the flanges 39 and 40. The ribs 45 engage over sides of the first convolution on the larger end of the springs 43 and 44, as shown in FIGS. 1 and 10, while the smaller ends seat on the faces 8 of the jambs. Supplemental springs 46 and 47 are contained, respectively, in the upper end of the space between the flanges 18 and 19 and the flange portions 22 and 23 of the channels, to supplement the sealing contact with the sash when the sash are in closed position. To apply added friction for holding the sash closed against action of their counterbalance springs, later to be described, the opposite ends of the springs 46 and 47 also seat against the faces 8 of the jambs.

The guide and weather-seal assemblies are retained against action of the springs when the sash are removed, by fixtures 48 (FIG. 1) secured to the upper and lower ends of the side jambs 4 and 5. The fixtures 48 are best illustrated in FIG. 12 and include plates of angle-shaped cross section to provide flanges 49 and 50. The flanges 49 seat against the jamb faces 8 and are secured thereto by fastening devices, such as nails 51, driven through openings 52 in the flange 49 and into the side jambs. The flanges seat on the header jamb 6 and sill 7 to extend slightly beyond the webs 26 of the channels 27. The inner edges of the flanges 50 have cars 53 and 54 that engage in the ends of the channels (FIGS. 10 and 11).

The sash 2 and 3 are counterbalanced between the guides 16 and 17 by means of coiled elongated springs 55. The springs 55 are completely housed within the channels 20 and 21 of the respective guides and are freely operable therein on elongation when the cash are lowered. The springs 55 are anchored at their upper ends by hooking the first or second convolution 56 over the upper ends of the webs 20 of the guides, as shown in FIG. 11. The lower end of each spring terminates in a hook 57 to connect with a slide 58 in each of the channels which carry trunnion members 59 on which. the sash 2 and 3 pivot when being moved to tilted position, as shown in FIGS. 1 and 4. The trunnion members 59 are also used to lock positively the springs 55 to the channels when the sash are removed, to hold the stored-up action in the springs.

The trunnion members 59 each include a cylindrical pin portion 61 having a diskshaped head 62 on its inner end that is preferably formed integrally therewith. The disk-shaped heads 62 have a major diameter to be turnable freely within the channels 20 and 21 when the sash are tilted for removal. However, opposite sides of each disk-shaped head 62 have flat sides 63 and 64 parallel with the flange portions 22 and 23 of the channels, to move with the slides freely up and down the channels when the sash are raised and lowered. The opposite, or outer, end of each pin portion 61 carries an integral head 65, of a diameter to lap the rails 30 and 31 on the convex sides thereof, as best shown in FIGS. 2, 3, 4 and 5. The inner faces 66 of the heads 65 have convex cams 67 that are curved substantially cylindrically on an axis parallel with the flat side faces 63 and 64 of the disk-shaped head 62. Thus the axis of curvature of the cam also extends in parallel relation with the rails 30 and 31, with the curvature of the cams located in the slot or way 34 between the rails and with outer opposite marginal edges of the cams riding freely on the convex curvature. of the rails 30 and 31.

Owing to the integral construction of the pin portion 61, disk-shaped head 62, and cam head 65, the slides 58 are constructed to permit easy assembly thereof on the pin portions 61. To accomplish this, each slide 58 is made up of two hinged-together sections 68 and 69 of identical formation. Each section 68 and 69 includes a generally rectangular body 70 having a transverse bearing face 71 of semi-circular cross section disposed inwardly from abutting faces 72 of the body portions 70. The transverse width of the body portions is such that when the faces 72 abut, faces 74 thereof are in close contact with the diskshaped head 62, and opposite faces 75 are located slightly short of the sash guide rails 30 and 31. The combined width transverse of the sections when closed over the trunnions 59 is such that faces 76 and 77 have guided contact with the flange portions 22 and 23 of the channels. Provided on the faces 75 of the slides are parallel ribs 78 and 79 to slide within said convex faces 32 of the rails. Each section 68 and 69 of the slide has a neck 80 terminating in a hemispherical head 81 which is offset from the neck to accommodate a downwardly opening slot 82 therein.

The slides 58, like the trunnion members 59, are formed of a plastic, such as nylon, and the sections 68 and 69 may be connected together at their lower ends by a strap portion 83 folded on itself to bring the face 72 of the section 68 into abutting registry with the corresponding face 72 of'the' section 69 when the sections are placed about the portion 61 of a trunnion. The sections 68 and 69 are secured together about the trunnions, in part, by a dowel 84 in the face 72 of one section and a dowel 85 on the other section engaging in holes 84 and 85' of an opposite section. The sections 68 and 69 are secured together in another part when the hooks 57 of the balance springs 55 are hooked into the slots 82 in the hemispherical heads, as shown in FIGS. 8 and 9. If desired, each section may have a tongue 86 to guard eachslot 82.

In order to latchably connect each trunnion 59 manually with its side of the sash, the cam heads 65 have integral levers 87 extending radially therefrom in parallel relation with the axis of the cams 67, so that when the earns 67 are slidably engaging the convex sides33- of'the rails 30 and 31, the levers 87 are in position to be contained within the grooves 36 of the sash (FIG. 2). The levers, being integrally formed with the trunnions, are flexible for manual engagement and disengagement with .a latch fixture 88 that is secured within each groove 36 of the sash at the lower ends thereof, as shown in FIG. 13. One of the latch fixtures 88 is best shown in FIG. 7, and comprises a preferably sheet metal plate 89 having a portion 90 of a width to be contained in the grooves 36 of the sash and which has an integral transverse head 91 initially formed at an angle to the portion 90. The head 91 has ends projecting from side edges 92 and 93 of the portion 90 to provide ears 94 and 95. Upper portions 96 of the plates 89 are of narrower width than the portions 90 and have ears or detents 97 and 98 and keeper flanges 99 and 100 to latch and contain the levers 87. The ends of the portions 96 have tongues 101 and 102 diverging from side edges thereof and an intermediate laterally bent spur 103 to be driven into the sash and cooperate with the ears 94 and 95 in securing the fixtures immovably in the grooves 36 of the sash (FIGS. 2 and 13).

When the fixtures are to be applied in the grooves 36 of the sash, the portions 90 are inserted into the open lower ends of the grooves 36 with the side edges '92 and 93 acting as guides engaging side walls 37 and 38 of the grooves 36 to center the portions 96. The tongues 101 and 102 slide along the bottom faces of the grooves, until the laterally projecting ears 94 and 95 of the head 91 are stopped by the lower edges of the sash. The head 91 is struck by a hammer to drive the ears 94 and 95 into the wood, after which the tongues 101 and 102 and spur 103 are driven into the sash, as shown in FIG. 13. The portions 90 and 96 of the plates will be drawn tightly against the bottom faces of the grooves, with the latch ears 97 and 98 and keeper flanges 99 and 100 properly located.

The latch ears 97 and 98 on the latch fixtures 8 8 are shaped to provide shoulders 105 and l'6 on the sides thereof remote from the keeper flanges 99 and 100. The latch ears 97 and 98 are further shaped to provide edges 107 and 108 sloping from the shoulders 105 and 106 down to the plate portion 96. The keeper flanges 99 and 100 are spaced from the latch ears and are formed by curving them inwardly over the plate portion 96 to provide grooves 109 and 110 having'a space therebetween to accommodate marginal edges 1 11 and 112 (FIGS. 8 and 9) of the lever 87 .therebetween.

The levers 87 have a width to be freely contained in the sash grooves 36 and the marginal edges 111 and 112 have notches 113 and 114 to receive the latch cars 97 and 98 therein. Ends of the notches 113 and 114 provide shoulders 115 and 116 to abut the shoulders 105 and 106 of the ears 97 and 98 when the levers 87 are in the latch fixtures 88 with the marginal edges 111 and 112 engaged in the grooves 109 and 110 of the keeper flanges 99 and 100 to form aconnection with the sash in a pulldown direction of the sash. A connection in the opposite direction or lift by the springs 55 is effected by ends user the keeper flanges 99 and 100 engaging a transverse rib 119'0n each lever 87, as best shown in FIGS. 3, 8 and 9. To facilitate flexing of the'levers 87- from off the shoulders 105 and 106 of the cars 97 and 98, the levers are relieved on rounded curves 120 (see FIG. 4).

The window sash 2 and 3 may be equipped with the usual sash locks comprising a keeper 121 that is attached to the lower rail 122 of the upper sash 2 and a cooperating cam lock 123 attached to .the.top-rail 1240f the lower sash 3, to lock firmly the sash together when in closed position.

The resilient guide and weather-seal assemblies 14 and 15 are assembled at the factory, so that they may be supplied as assembled units for installation in window frames, either at the sash factory or on the job. Slides 58 are assembled on the trunnions 61 and the sections 68 and 69 brought together, with the dowels 84 and entering the openings 84' and 85'. This brings the bearing portions 71 snugly around the trunnions and the faces 72 into abutting contact. Hooks 57 on the balance springs 55 are engaged in the slots 82 by pressing them against the resilient tongues 86 and bringing the hook upwardly into the slots 82 to compelte installation of the slides on the trunnions 61, as shown in FIG. 8. The ends of the springs 55 having the convolutions 56 are inserted from the lower ends of the guide channels 20 and 21, care being taken to see that the ribs 78 and 79 on the slides enter the concavities 32 of the guide rails 30 and 31, with the trunnion portions 61 passing through the ways 34, so that the cam heads 65 ride on the outer convex faces 33 of the guide rails. With the levers 87 extended parallel with and in the longitudinal direction of the springs 55, the slides are easily pushed into the channels with the faces 76 and 77 sliding along the flange portions 22 and 23 of the channel's. When the coils 56 on the springs 55 are in position with the upper ends of the webs 20 of the channels, they are hooked thereover, as shown in FIG. 11.

The conical springs 43 and 44 are slid into the respective ends of the weather-seal and guide strips 16, so that the opposite diametrical sides of the largest convolution enter under the ribs 45, as shown in FIG. 10. The supplementary springs 46 and 47 are similarly inserted and properly positioned in the weather-seal and guide strips, as shown in FIG. 1. The seal strips 42 are inserted in the grooves 41.

The fixtures 48, together with their nails 51, and sash fixtures 88, are preferably packaged with the assemblies. The assemblies are pack-aged in pairs, so that a complete unit is available for a window.

Assuming that the window frame 1 has been installed in the wall of the building to provide the pockets 11 in the side jambs 4 and 5 to receive the assemblies 14 and 15, a fixture 48 is attached in upper and lower ends of the pockets 11 by placing the flanges 49 against the jamb faces 8 and the flanges 50 against the header 6 or sill 7, as the case may be, and driving fastening devices such as nails 51 through the openings 52 into the jambs 4 and 5, as shown in FIGS. 1 and 11.

The weather-seal and guide strip assemblies may then be easily inserted in the pockets 11 of the side jambs by placing one end in position, say on the sill 7, with the webs 26 passing over the cars 53 and 54 of the fixtures 48. Sufficient bow is now produced in the weather-seal and guide strips so that the other ends thereof may pass under the cars 53 and 54 at the ends of the side jambs. On release of the bowing pressure, the weather-seal and guide strip assemblies will straighten out so that the weatherseals 42, small convolutions of the springs 43 and 44, and the free ends of the springs 46 and 47, contact with the inner face 8 of the side jambs, in which position the fronts 17 of the strips 16 will project slightly beyond the faces 9 and 10 of the side jambs. Installation of the weather-seal and guide assemblies is now completed in a window frame.

Sash fixtures 88 are applied to each sash 2 and 3 as previously described.

The slide and trunnion members 58 and 59 for the lower sash 3 are brought downwardly within the guide channels with the levers 87 serving as handles. This stretches the coil springs 55 until they are positioned a short distance above the sill 7, whereupon the levers 87 are swung toward the room in which the frame 1 has been installed. This movement of the levers turns the trunnions 61 in the slides 58 to cause the cam heads 65 to cooperate with the guide ribs 78 and 79 in clamping the slides to the guide rails, and thereby lock the slides imposition to mount the sash. 7

The slides for the upper sash are similarly positioned and locked a short distance above the levers for the lower sash. The upper sash is now presented to the levers 87 with the sash substantially horizontal and with the rail 122 facing the endsof the levers, so that the sash may be slid over the levers. As soon as the side edges of the sash contact the guide rails for the lower sash, they will be cammed inwardly by the ends of the sash passing over the convex curvatures 33 of the rails, pressing the weather-seal and guide strip assemblies into the pockets 11. Continued movement will cause the sash to similarly displace the rails for the upper sash until the free ends of the levers 87 enter the grooves 109 and 110 formed by the keeper flanges 99 and 100 of the sash fixtures 88. Finally, the ends 118 of the keeper flanges 99 and 100 come into abutment with the ribs 119 on the levers, and the notches 113 and 114 in the levers will permit the levers to snap over the detents 97 and 98. All during this manipulation of the sash, the slides are in locked position holding the balancing springs in tension. The upper sash is then tilted upwardly with the trunnions 61 turning in the slides. As soon as the grooves 36 in the sides of the sash register with the guide rails, the springs will return the fronts 17 of the weather-seal and guide strips 16 into pressing contact with the sides of the sash and the guide rails in the grooves of thesash, as shown in FIG. 2.

The lower sash 3 is similarly applied and tilted into position parallel with the upper sash.

The sash are now free to be raised and lowered under the counterbalancing action of their springs 55, with the guide rails retaining the sash in slidingposition within the frame.

When it is desired to tilt the sash 2 and 3 for removal thereof, the lower sash 3 is railed from the sill 7, whereupon a pulling pressure is applied to the upper rail 124 of the sash, causing the side edges thereof to cam the guide rails out of the sash grooves 36, at which time the sash is easily brought to horizontal position, as shown in FIG. 1. The levers 87, of course, are turned with the leverage effected through the tilting of the sash by reason of their connection with the sash fixtures 88, to lock the slides and retain stored-up action in the springs. The outer face of the sash may be easily washed in this position, however, if it is desired to remove the sash, the free ends of the levers 87 are accessible so that they may be engaged to bend them outwardly from engagement with the detents 97 and 98, as shown in FIG. 4. A pulling force applied to pull the sash outwardly from the levers withdraws the sash, as shown in FIG. 5.

After removal, the sash are easily replaced as previously described.

When the sash are in position closing the window opening, connection of the sash lock parts 121 and 123 will lock the sash together, so that the sash cannot be displaced from the frame or tilted until the sash are released by operating the lock part 123.

What I claim and desire to secure by Letters Patent is:

1. A tilt-out sash window, including 1 a frame having side jambs providing longitudinally inset pockets,

. weather-seal guide strips in the pockets and having fronts carrying spaced apart guide rails projecting outwardly from said fronts and over sides oflongitudinal ways between the guide rails,

sash having grooves in side edges thereof slidably containing the guide rails therein to retain the sash for sliding movement in the frame.

means between the weather-seal guide strips and jambs to resiliently bias the weather-seal guide strips into sealing contact with sides of the sash and yieldable upon tilting of the cash by camming pressure of side edges of the sash on the guide rails,

? balancing springs having uppen ends anchored rela: tively, to the weather-seal'guide strips, slides having connections at lower ends of the springs and having faces slidable along inner faces of the guide rails, r v vtrunnionsjournaled in thefslides for restricted axial movement in the slides,

and means onsaid trunnions and having connection with the sash to pull the slidesinto gripping engage- .ment. with the inner faces of the guide rails for locking the slides tothe guide rails for holding the slides upon tilting of the sash. i 2. A tilt-out. sash window as described in claim 1,. in which saidmeans on the trunnions comprise cam heads on outer sides of the guide rails and having cam faces normally positioned between the guide rails during slidingtmovement of the sash'in the frame and turnable with the trunnions upon tilting ofthe sash to cooperate .with the slides in gripping the guide rails therebetween insaid tilted-out posi- ,tion of the sash. r

.3. A tilt-out sash window as including levers having fixed connection with the ca m heads and contained in the grooves of the sash to establish the turning forces of the trunnions on the cam heads when the sash is tilted 4. A tilt-out sash window as described in claim 3, and including I i latch fixtures in grooves'of the sash having manually releasable latch connections with the levers for release of the levelsto withdraw the sash from said levers when the sash are intilted position.

5. A tilt-outsash window as described in claim 3, v in which the levers have a notch in at least one margin edg andlatch fixtures in grooves of the sash comprising plates and havi ng a detent engaged in the notches of 7 seid levers,

.keeper flanges on side edges of the plates and slidably containing the marginal edges of the levers to main- I tain latched engagement with the detents, and said levers being of flexible material for manually lifting the levers from said detents after the sash have been tilted out of the frame for pulling of the sash font of said keeper flanges to remove the sash. 6. A tilt-out 'sash window as described in claim 1,

wherein the weather-seal guide strips, slides and trunnions are of non-metallic resilient material,

and in which the connection means on the trunnions comprise integral cam heads on outer sides of the guide rails having cam faces positioned between the -guide rails dur' g sliding movement'of the sash in the described in claim .2, and

frame, and I levers integral with the cam heads and contained in the grooves of the sash to establish turning forces of the cam'heads for bringing the cam faces crosswise of the guide rails; to cooperate with theslides in gripping the guide:rails therebetween when the sash is tiltedout of the frame; a 7. A tilt-out sash window as described in -claim 6, and including i "detent means in the grooves of the sash for connecting the sash with the balancing springs, I said levers being manually releasable from thedetent means incidental to the resilient material of said lev i ers after the slides are gripped to the guide rails. 8 A tilt-outsash window as described in claim 1, and including- 7 supplemental biasing means for applying additional pressure on the sash when the sash are in closed position in said frame. H I p 9. -A tilt out sash window asdescribedin. claim 1,

which the guiderails are of .concavo-convex cross section and the slides have ribs sliding in the concavity at the inner faces of the guide rails,

and the means on the trunnions grip the outer convexity of the guide rails.

10. A tilt-out sash window as described in claim 9,

in which the means on the trunnions have curved cam faces extending crosswise of the trunnions with the axis of curvature in position between and parallel with the guide rails when the sash are in sliding position on the frame and which is crosswise of the guide rails in said tilted position of the sash.

11. A tilt-out sash window having a frame having side jambs providing longitudinally inset pockets and sash slidable in the frame,

weather-seal guide strips in the pockets and having fronts carrying spaced apart guide rails projecting outwardly from said fronts and over sides of longitudinal ways between the guide rails,

said sash having grooves in side edges thereof slidably containing the guide rails therein to retain the sash for sliding movement in the frame,

means between the weather-seal guide strips and the jambs to resiliently bias the weather-seal guide strips into sealing contact with sides of the sash and yieldable upon tilting of the sash by carnming pressure of side edges of the sash on the guide rails,

balancing springs having upper ends anchored relatively to the weather-seal guide strips,

slides having connections with lower ends of the springs and having faces slidable along inner faces of the guide rails,

trunnions journaled in the slides and having ends projecting through the longitudinal ways in said fronts of the weather-seal guide strips,

heads on ends of the trunnions to engage respectively the slides and outer faces of the guide rails,

one of said heads having a cam surface cooperating with said part on which said sead engages to draw the slide into gripping contact with the guide rails,

and means fixed to the heads which are engageable with the guide rails and having connections with the sash to effect said gripping contact of the guide rail when the sash is tilted out of the frame.

12. A tilt-out sash window as described in claim 11,

wherein the sash connections include levers fixed to the heads engaging the guide rails,

said levers being contained in the grooves of the sash to rock the trunnions and effect said gripping contacts of the guide rails when the sash is tilted out of the frame.

13. A tilt-out sash window as described in claim 12,

and including means for anchoring the fixtures to the sash,

detents engaging shoulders on marginal edges of the levers,

and fixtures carrying said detents and having keeper flanges engaging marginal edges of the levers to releasably retain the shoulders in engagement with the detents.

14. A tilt-out sash window as described in claim 12,

wherein the weather-seal guide strips and slides are resilient plastic material, having the characteristics of nylon,

and said trunnions, heads on the trunnions, and levers are integral parts, also of a material having the characteristics of nylon.

15. A tilt-out sash window as described in claim 12,

wherein the weather-seal guide strips and slides are resilient plastic material having the characteristics of nylon,

and the trunnions, heads on the trunnions, and levers are an integral part, also of material having the characteristics of nylon,

and said sash fixtures are of rigid material.

References Cited UNITED STATES PATENTS 3,349,5l8 10/1967 Johnson 49-446 DAVID J. WILLIAMOWSKY, Primary Examiner.

I KARL BELL. Assistant Examiner.

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Classifications
U.S. Classification49/414, 49/176, 49/161, 49/453, 49/446
International ClassificationE06B3/50
Cooperative ClassificationE06B3/5063, E06B3/50
European ClassificationE06B3/50G2, E06B3/50