US2907079A

US2907079A - Window construction

Info

Publication number: US2907079A
Application number: US532545A
Authority: US
Inventors: Herbert K Lundgren
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-09-06
Filing date: 1955-09-06
Publication date: 1959-10-06
Anticipated expiration: 1976-10-06

Description

Oct. 6, 1959 H. K. LUNDGREN wmnow CONSTRUCTION 4 Sheets-Sheet 1 Filed Sept. 6, 1955 (1&3.

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H; K. LUNDGREN wmnow consmucnou Oct. 6, 1 959 4 Sheets-Sheet 2 Filed Sept. 6, 1955 i f. .S.

Oct. 6, 1959 LUNDGREN I 2,907,079

WINDOW CONSTRUCTION Filed Sept. 6, 1955 4 Sheets-Sheet 3 Filed Sept. 6, 1955 4 Sheets-Sheet 4 QQM m+ United States Patent 7 WINDOW CONSTRUCTION Herbert K. Lundgren, Oshkosh, Wis.

Application September 6, 1955, Serial No. 532,545 5 Claims. c1. 20-522) This invention relates to a window construction, and more particularly to removably mounted, double hung, vertically slidable sash windows.

The main objects of the invention are to provide improved means for removably mounting the sashes in a double hung vertically slidable window construction; to provide a simple construction for removably mounting such sashes; to provide a simple mounting construction which may be handled and installed as a unit with equal facility by mechanics of average skill working in a shop or mill and by building trade mechanics working on the job, i.e., on a house or other building under construction; to provide such a means which may be employed for converting conventional, non-removable, vertical slidable sash windows into removable vertically slidable sash windows; to provide such mounting means embodying effective sash counterbalancing means for holding the sash in any selected position of adjustment; to provide such mounting means in which there is incorporated, in effect, Weatherstripping for insuring wind and weather tightness of the sashes in the frame in which the sashes are mounted; to provide such mounting means which is durable and resistant to corrosion, injury or damage in its normal environment; to provide sash mounting means of the character indicated which can be incorporated in more or less standardized window constructions with a minimum of change in the standard construction; and in general, it is the object of the present invention to provide an improved removable double hung window construction.

Other objects and advantages of the invention will be understood by reference to the following specification and accompanying drawings, 4 sheets, wherein there are illustrated several of the presently contemplated best modes of carrying out the invention.

In the drawings:

Fig. 1 is a horizontal sectional view through a vertically slidable double hung window construction embodying a selected form of the invention;

Fig. 2 is a vertical sectional view on the line 22 of Fig. 1, with the sashes omitted (except for a partial showing of one sash) to more clearly show the mounting means;

Fig. 3 is a vertical sectional view on the line 33 of Fig. 1;

' Fig. 4 is a plan section on the line 4-4 of Fig. 3;

Fig. 5 is a horizontal sectional view similar to Fig. 1 but illustrating a modified construction;

Fig. 6 is a vertical sectional view on the line 66 of Fig. 5;

Figs. 7, 8, 9 and 10 are perspective illustrations of certain elements of structure;

Figs. 11 and 12 are cross-sectional illustrations which represent modifications of one of the elements employed in the structure shown in Figs. 5 and 6;

Fig. 13 is a horizontal sectional view similar to Fig. 1, but illustrating another modification;

2,907,079 Patented Oct. 6,

Fig. 14 is a vertical sectional view on the line 1414 of Fig. 13;

Fig. 15 is a horizontal sectional view similar to Fig. 1, but illustrating still another modification;

Fig. 16 is a vertical section on the line 1616 of Fig. 15; and

Fig. 17 is an exploded perspective illustration of certain elements of the construction shown in Figs. 15 and 16. 1

As shown in Figures 1 and 2, the present invention is associated with a more or-less conventional or stand ardized window frame which comprises

side members

1 and 2, outer or blind stops 3, inner or trim stops 4, an upper member 5, a sill 6, and an inside window ledge 7. The usual parting stops and recesses for receiving the same are omitted. Conventionally constructed

sashes

10 and 11 are vertically slidably mounted in the frame,

the sash 10 being, 'in this instance, the inner or lower sash and the sash 11 being the outer or upper sash. These sashes have meeting rails indicated at 12 and 13 respectively, the meeting rail 12 being a portion of the upper cross member of the inner sash and the meeting rail 13 being a portion of the lower cross member of the upper sash. These meeting rails are in accordance with conventional double hung vertically slidable sash construction.

In the arrangement shown in Figure 1, the opposite side edges of both of the sashes are similarly mounted in the frame for vertical sliding movement. The mounting means comprises (at each side) a guide member or strip 14 which may advantageously be formed of aluminum extruded through an appropriate die to provide the illustrated cross-sectional shape. As illustrated, the guide member 14 comprises a central plate or web portion 15 and a pair of

arcuate ribs

16, 16 which extend edgewise from the intermediate web 15 and also project from the plane of saidintermediate web.

The guide members 14 are supported in vertically fixed position relative to the

respective sides

1 and 2 of the frame by suitable means such as common wood screws 17 which pass through appropriate holes in the web 15 of the guide member and are screwed into the

respective frame sides

1 and 2. These screws -17 are preferably of flat countersunk head type having a smooth shank portion 18 which will permit free sliding movement of the guide members 14 along the lengths of said shanks. The webs 15 are provided with countersunk openings to receive the heads of the screws 17 so that the flat head surfaces will be flush with or below the outer surfaces of said webs 15. In most installations, supporting screws 17 are required only near the upper and lower ends of the strips 14 but additional supporting screws may be employed intermediate the end-adjacent screws if desired.

Suitable spring means is provided for yieldingly urging the guide members 14 towards the respectively adjacent sash edges which are provided with arcuate recesses 19 for receiving the respective guide ribs 16 as shown. In a preferred arrangement, the spring means for urging the guide members toward the adjacent edges of the sashes consists of a spring plate 20 which extends substantially the full length of the guide member. Said spring plate 20 maybe of any suitable material, spring bronze being particularly suitable. The thickness and resiliency of the material should, of course, be selected to provide the desired degree of pressure for holding the guide member 14 in engagement with the

sashes

10 and 11. The frictional engagement thus produced between the guide members 14 and the edges of the sashes may be adequate to hold the sashes in any selected position of vertical adjustment, especially in the case of smaller sized sashes.

For larger sashes, additional counterbalancing means may be provided as will presently be explained.

The spring or pressure plate 20 may be made in various shapes, that illustrated in Figure 1 being particularly suitable. As shown, it comprises a central web portion 21 and

wing portions

22, 22 which are connected through the agency of

small ribs

23, 23 to said central'web portion 21. The web portion 21 may be of fiat form as illustrated, and provided with suitable openings to receive the screws 17. The guide member 14 and the adjacent pressure plate 20 are preferably attached to each other so that they may be handled and installed as a unit. One suitable means for inter-attaching these elements is illustrated in Figure 4 as comprising the formation of short tubular rivets 24 integrally with the web 15, said rivets being punched out of the web portion 15 of the guide member, passed through holes in the spring plate and headed over the same. The tubular rivets may re ceive the supporting screws 17 if desired, and said integral tubular rivets may be replaced by suitable separate solid or tubular rivets which would preferably be countersunk into the webs 15 to avoid any interference with the movement of the sashes. In four to six foot lengths, two of these fastenings, preferably located adjacent the opposite ends of the guide member, will usually be sufiicient for practical purposes although more may be used if desired, and a single such fastening may be sufficient in some cases.

The spring backed guide members 14 are yieldingly urged into snug frictional engagement with the respectively adjacent edges of the sashes and 11. It is especially desirable that the arcuate ribs 16 of the guide members be fully seated in complementaryrrecesses in the sash edges as shown, so that there will be no significant leakage of air between the sash edges and said ribs. The sash edge portions which overlap portions of the central web of the guide members may also be caused to fit snugly against the adjacent web portions although this is not so important.

The seating of the spring plates against the web 15 of the guide member through the agency of the transversely spaced ribs 23. serves to provide a Weathertight joint between the spring plate and the guide member, and the seating of the wings 22 of the spring plate against the

frame sides

1 and 2 serves to provide weathertight joints between the spring plates and said frame sides. Accordingly, weathertightness is provided between the sash edges and the

frame sides

1 and 2 notwithstanding the substantial spacing which exists between said sash edges and frame sides.

Vertical sliding movement of the sashes is guided primarily by the ribs 16 of the guide members 14. Because of the snug fit of the ribs 16 in the grooves of the sashes, the lit of the sashes against the

stops

3 and 4 may be quite loose or free so as to avoid any binding action by engagement with said stops.

The guide members 14 may be extruded of suitable metal, for example, aluminum. If the guide member is 2 inches wide from edge to edge, the thickness is madeabout -inch, and the ribs formed on an internal radius of about of an inch about a center oifset from the plane of the web to cause the convex side of the rib to project about A; of an inch from the adjacent face of the web, the guide member will be substantially rigid and very durable, but these dimensions are not critical and may be varied considerably. The width of the central portion or web 15 of the guide member is such that the rib formations 16 will be disposed approximately midway" of the thickness of the respectively adjacent sides of the

sashes

10 and 11.

The spring plate member 20 may be made of bronze, stainless steel or other suitable spring material of suitable strength, and preferably of material which will not corrode in the presence of moisture. In one practical embodiment, a spring plate of the characterrepresented in Figure l was made of spring bronze having a thickness of 4 .010 of an inch. The width of the member 20 from edge to edge was 2 3 inches.

With the arrangement above described and illustrated in Figures 1 to 4 inclusive, the sashes are easily movable up and down along their respective guide ribs, and for many sizes of sashes, the friction between the guide ribs 16 and the sash edges is suflicient to hold the sashes in any selected position of adjustment along said guide ribs. Some control of the pressure exerted by the guide ribs against the sash edges is available by appropriately forming or bending the legs or wings 22 of the spring plates so as to increase or reduce the pressure exerted by said spring members on the guide members. The supporting screws 17 may be adjusted to limit the extent to which the guide members may be moved by the respective pressure plates, thereby also limiting the pressure with which guide ribs may be forced into engagement with the sash edges.

The yielding support provided by the spring plates 20 for the guide members 14 also serves the important purpose of enabling the sashes to be removed from the window frame for washing and other purposes. To remove one of the sashes, for example the sash 10, it should be raised sufiiciently to permit the sash to be grasped at the top and at the bottom. The sash is then moved sideways in either direction, this being permitted by the yielding support for the guide members. The sash 10 may thus be moved sideways to the left as viewed in Figure 1 so as to depress its left side edge in the recessed area, 26 to an extent which will be sufiicient to cause the right-hand edge of the sash to be withdrawn from the recess 27 at the right-hand side of the frame. To the extent that the screws 17 will permit, the adjacent guide 14 will follow the withdrawn edge of the sash 10 but such movement of the guide member is limited by the screws so that the right-hand side edge of the sash 10 will be separated to at least some extent from the adjacent guide member 14. The right-hand side of the sash, having been withdrawn from the recessed area 27 and separated from the adjacent guide 14, said side of the sash may then be rocked laterally or facewise mwardly past the trim stop 4 and past the rib 16 which normally guides the right-hand side of the sash.

As the right-hand side portion of the sash 10 is moved inwardly past the trim stop 4, said right-hand side portion of the sash will, in most installations, engage the adjacent rib 16 and cam it into the recess 27 against the pressure of the spring plate 20. A coil spring 28 located in the hollow of the rib 16 for purposes which will pres ently be explained, limits the extent to which the gu de member may be cammed into the recess 27, but the guide member is nevertheless capable of sufficient movement into the recess to permit the sash to be moved past the rib 16 in the manner explained. Inward facewise movement of the sash at the right-hand side thereof is continued until the right-hand side of the sash is past the trim stop 4 and in a position in which the sash as an entirety, may be moved edgeways to the right to withdraw it completely from the left-hand recess 26 and from the frame. Replacement of the sash proceeds in the reverse order. It is not essential that any separation be effected between the guide 14 and the adjacent edge of the sash which is to be moved facewise out of the frame. 1 Proper tioning of the structure to cause at least slight 'separatlon is however, preferred in that it' reduces the force required to effect outward camming of the guide member by .the facewise movement of the sash. I

To remove the upper sash, the procedure is similar except that the inner sash is first removed and the upper sash then lowered sufliciently to enable it to be grasped at its top and bottom edges whereupon similar edgewise and facewise movements of the sash will effect its removal from the frame. Such'removal is normally ef fected inwardly althoughit may also be efiected' outward- 1y. In some instances, it may be preferred to prevent means of one or more screws as represented at 43 or otherwise.

At the opposite side of the frame, a'guide member 44 is provided, this guide member embodying a central fiat portion or web portion 45, and

arcuate rib formations

46, 46 along the opposite edges of said web portion 45-. The ribs 46 are similar to the ribs 16 of the guide 14 although they may project to a slightly greater extent from the plane of the central web portion 45 substantially as illustrated. The guide member 44 is mounted for adjustment toward and from the frame side member 2 through the agency of screws such as indicated at 47 and conical coil springs 48. The coil springs 48 surround the screws 47 and are thereby kept in place. Screw and spring sets of the character indicated, may be located near the upper and lower ends of the guide member 44 as indicated in Figure 6, and if desired there may be additional sets intermediate the end-adjacent sets.

Tofacilitate mounting of the guide member 44 with the springs 48 in place, the outer face of the central web'45 may be provided with a pair of shallow ribs such as indicated at 49, which are spaced from each other a distance which will permit the base coils of the springs 48 to be clamped in place between the ribs incident to slight distortion or flattening of such coils in order to fit them between the ribs. Accordingly, the coil springs may be seated and more or less temporarily held in place in concentric relation to the holes provided for-receiving the screws 47 before the guide member is placed in the desired relationship to the frame side member 2.

When the guide strip with the springs attached is properly positioned relative to the frame side 2, the screws 47 may be passed through the holes provided in the web 45 and axially through the springs 48 and driven into the frame side 2 to support the guide member for adjustment toward and from the frame side as above mentioned. The conical form of the springs 48 permits the same to be collapsed into a thickness corresponding substantiallyto the thickness of the wire from which the springs are formed so that the spring will not require the provision of space in any substantial amount for accommodating the spring in addition to the amount required for permitting depression of the guide member 44 into the frame recess 50 for sash removal purposes.

The guide member 44 is also provided with a pair of outwardly projecting ribs 51 of substantial'width, these ribs being adapted to enter recesses or kerfs 52 provided in the frame side 2. These ribs 51 may be somewhat thinner than the width of the grooves 52 so that they will fit freely in said grooves, but the free edges of said ribs 51 may be provided with edge beads as indicated at 52 which fit fairly tightly but nevertheless freely movably in the kerfs 52. These ribs 51 serve to prevent free movement of air through the space betweenv the guide member 44 and the frame side 2 while at the Sametime permitting the guide member 44 to be moved' toward and from the side member 2..

When the size of the sashes and 11 is such that the pressure'of the

ribs

46 and 16 on the grooved edges of the sashes'cannot be relied upon to hold the sashes in adjusted position, counterbalancing springs such as indicated at 53 are provided. These counterbalancing springs are operatively associated with the guide member 44 and with the respective sashes in a manner quite similar to that described in connection with Figures 1 to 4 inclusive. However, instead of attaching the upper endsof the springs to ears punched from the upper end portions of the ribs 46 as in Figure 3, said springs may have their upper ends hooked to the opposite end portions of a clip 54 which is anchored to the upper end .of the central or web portion 45 of the guide strip 44. Said clip 54 is illustrated in Figures 6 and 9 and as there shown, may be of sheet metal construction. formed to provide a wide hook portion 55 which is adapted to en-. gage over the upper end of the-guide strip 44.

The flanges 51 of the guide strip are provided with upper end slots 56 (Fig. 8) which are adapted to receive the end extensions 57 of the clip. Said end extensions are preferablyprovided with suitable anchoring seats or openings as illustrated, to receive the books of the springs 53. The ribs 49 of the guide member are also terminated below the upper end of the guide strip so as to avoid interference with the placing of the clip in the manner illustrated in Figure 6. With this clip arrangement, the spring attaching end portions 57 may be offset toward or from the ribs 46 as may be desired to position the counterbalancing springs 53 in the desired spaced relation to the inner surface of the arcuate ribs .46. t

The lower ends of the springs 53 may be detachabl connected to the bottom rails of the respective sashes through the agency of hangers, such as the above described hangers 31. Another suitable form of hanger is represented in Figures 5, 6 and 10. The hanger there shown, comprises a suitable wire bent to provide a spring engaging hook 58, a depending leg 59, and a laterally extending shelf or ledge portion 60. A portion of the hanger, i.e. the ledge portion and part of the leg 59, is suitably coated or covered with non-metallic material as indicated at 61. In this instance, the ledge portion 60 is made to conform closely to the curvature of the arcuate ribs 46 as best shown in Figure 5, and such hangers be caused to bear against the ribs 46 by twisting the springs to provide the required torsion effect as above explained, in connection with Figure 4. This, however, is not required in either form of the invention.

The upper end of the hanger may have a guide element 62 applied thereto, this guide element being of generally cylindrical form and diametrically grooved to receive substantially parallel portions of the upper hook portion 58 of the hanger. The slotted member 62 may be assembled by placing one of its radial slots about the leg portion 59' of the hanger immediately below the rebent portion 63 thereof and then sliding the member upwardly so as to cause the rebent hook portion 63 to enter the opposite slot in the member. To keep the member 62 in place, the lower end portion of the rebent hook element 63 may be slightly bent toward the leg 59 so as to prevent the member 62 from dropping down along said leg. This member 62 may be made of fiber or any other suitable material and is made of a diameter which is preferably slightly larger than the outside diameter of the associated spring 53 so'that the member 62 will be engageable with the insideof the rib 46 to thereby prevent direct contact between the spring 53 and said rib or other adjacent parts. The lower end of'the spring is,,of course, hooked into the eye or hook 58 as illustrated in Figure 6.

In the construction described in connection with Figures 5 and 6, it is preferable to provide a somewhat wider space between the side frame element 2 and the adjacent side edges of the sashes in order that the sashes may be moved sidewise to an extent sufiicient to permit the opposite or remote side edges of the sashes to easily clear the fixed guide ribs 16 to permit said remote side portions of the sashes to be swung laterally for removal from the frame. It will, of course, be apparent that such removal may be effected by first adjusting the inner sash to a position in which it may be gripped at top and bottom and then moved edgewise toward the side frame 2 against the pressure of the coil springs 48. Incident to such edgewise movement of the sashes, the ribs 51' of the guide member 44 will move farther into the slots 51. The depth of the slots 52, and the depth of the recessed area 50, should be so related to the distance which the guide ribs 16 project from the web of the guide member 14 that the guide member 44'rnayrbe 'suf ficiently depressed to permit the ribs 1.6 of said fixed removal of the sashes outwardly from the frame and this may be done by sutfi'ciently increasing the extent to which the blind' stops 3 overlap the marginal side portions of thefsash 11, for example, by increasing the overlap to an extent such as represented by the dotted lines 3a.

- When the sashes are of such size that they cannot be properly supported in selected position of adjustment by the pressure of the guide members 14 alone, counterbalancing springs, such as represented at 28, may be provided. Such springs 28 are conventional helical tension springs. The upper ends of the springs 28 are provided with suitable hook formations 29 which are hooked over suitable anchoring devices such as ears 30, punched outwardly from the respective guide ribs 16 as shown in Figures 2 and 3.

In Figure 3, the hook 29 is illustrated as being offset from the axial center of the spring 28 for engagement with the anchoring ear 30 in a manner to normal-1y tend to maintain the upper end portion of the spring spaced from the rib 16 of the guide member. This is desirable in-Iorder to prevent noisy rubbing contact between the spring and the guide rib 16 but it is not essential since the amount of noise produced in the manner indicated is not seriously objectionable. Furthermore, in some instances the spring 28 may have its outer surface areas coated or covered with fibers, flocking or with other material which will prevent noise producing, metal-to-metal contact between the spring and the adjacent guide rib. As' represented in Figure 2, the hook portion 29 of the spring 28 for the inner sash is preferably made somewhat longer than the hook portion for the spring of the outer sash 11.

The lower end of each spring 28 is connected to the sash with which it is associated, preferably by means of a detachable connection, to the lower portion of the sash.

For this purpose, a hook or hanger 31, such as represented in Figure 7, may be employed. This hanger 31 has an upper end hook portion 32 which is engaged with the lower hook or eye 33 of the spring as shown in Figure 2. Said hanger 31 also has a depending stem portion 34 and a lower end loop or ledge portion 35. The loop or ledge portion 35 is so formed that an arm portion 36 thereof extends outwardly from the hollow of the rib 16 past its free edge 16a (Fig. 4), the remainder of the loop extending around the front or outside of the arcuate rib 16 in spaced relation thereto, so as to provide a ledge which may be easily engaged with the bottom of the sash when inserting the sash into the frame.

The inner or lower sash 10 is preferably provided with a shallow recess 37 in its bottom rail to receive the ledge portion 35 of the hanger and so as to permit said inner sash to be lowered into seating engagement with the sill 6 as shown in Figure 2. The spring 28 for the upper or outer sash is similarly connected to the bottom edge thereof. For this connection there is, however, no need for employing a recess, such as the recess 37 for receiving the :ledge portion of the hanger since the bottom edge of the upper sash is not normally lowered into engagement with the sill 6. However, there is no objection to the employment of the recess, and it may be desirable to do so for the purpose of at least partially concealing the ledge portion of the hanger and for standardization purposes in construction.

When the sash 10 is in its normal lowered closed position, the spring '28 will be stretched and under tension which tends to raise the sash 10. The spring is, of course, selected of such strength that it will not alone be capable of raisingthe sash but will serve as a counterbalance which aids manual raising of the sash. Similarly, the spring 28 for the upper sash is selected to cause it to counterbalance said sash but not to move it without the aid of'manual force applied to the sash.

The hanger 31 for the outer or upper sash is, of course, made left-hand if the hanger for the inner or lower sash is considered right-hand '(see Fig. 1). The hangers 31 are preferably made of fairly stiff wire bent to shape, for example, steel wire having a diameter of about 0.10 of an inch. This wire may be treated or alloyed with material to prevent corrosion by moisture, or it may be made of non-corrosive material such as bronze, if desired. However, corrosion does not ordinarily occur to any troublesome extent in installations of the character here represented.

To prevent noise incident to metal-to-metal contact during movement of the spring and the hanger relative to the guide member, the hangers 31 are preferably coated with a suitable tough rubber or plastic covering material represented at 38. A fixed coating of this character is preferred although the hanger may be enclosed in a tube of suitable material slipped over the wire either before or after it is formed into the hanger.

The ledge portion 35 of the hanger may have its free end terminated in a rebent end portion 39 to provide a smooth round end 40 which usually rests against some portion of the guide strip substantially as represented in Figure 4. Also, the spring 28 may be twisted or wound sufiiciently to cause it to produce a torque action by which the hook 31 will be normally rotated in a direction to cause its free end portion 39 to normally assume the guide strip engaging relationship indicated in Figure 4 throughout the relative vertical movement of the hanger and the guide strip incident to vertical adjustment of the sash. This torque action also tends to maintain the upper hook 29 in fixed position relative to the anchoring ear 30 and the adjacent portions of the ribs 16 as indicated in Figure 3.

A further means for preventing noisy metal-to-metal contact is to enclose the lower end portion of the spring 28 and the upper portion of the hanger 3-1 in a sleeve 41 of paper, fiber or other suitable material. This sleeve 41 may be made to have aninternal diameter which will fit in gripping relation around the lower end portion of the spring 28 and the lower portion of the sleeve may be more or less collapsed as indicated at 42 around the upper portion of the hanger. The collapsed or tapered portion 42 of the sleeve serves to prevent the sleeve from riding up on the spring so that the sleeve will remain in housing relationship to the connection between the spring and the hanger.

As shown in Figure 2, the hook 29 of the spring for the lower sash 10 is considerably longer than the hook 29 of the spring for the upper sash. The difference in length may be substantially greater than that represented in the drawing. The spring 28 for the inner sash 10 is stretched and is under its greatest tension when the sash 10 is in normal, lowered or closed, position. It is not necessary that the stretched spring extend throughout the major portion of the length of the guide member and the use of the longer hook 29 serves to aid in reducing the necessary length of spring 28. For like reason, the hanger 31 associated with the lower sash 10 may be substantially longer than the hanger associated with the upper or outer sash. The upper or outer sash is normally in up or closed position at which time its counterbalancing spring 28 is under only sufficient tension to insure stability of the sash in such closed position. When the upper sash is to be lowered, the spring associated therewith therefore offers only slight resist ance to lowering of the sash and will not at any time become sufliciently tensioned to effect upward movement of the sash from a selected position of adjustment without outside assistance.

In Figures 5 and '6, there is illustrated a modified arrangement of removable sash mounting which partially embodies the principles of sash mounting illustrated in Figures l-to 4 inclusive. In the modification, one side of the window frame is provided with a guide member 14 of the same type as represented in the arrangement of Figures 1 to 4 inclusive. This guide member is, however, fixedly mounted on the frame side 1 by 9 guide member 14 to be cleared inthe manner already referred to. r

To avoid unusual extension of the blind stop 3 for deepening the recess 50, an extender strip 64 may be attached to said stop 3 as shown in Figure 5. ThlS extender strip 64 may be of suitable sheet metal, preferably of spring metal and it is suitably anchored as indicated at 65 to the inside of the blind stop 3. By the use of this extender strip the usual or standardized frame construction may be retained. The opposed trim stop 4a may be of somewhat greater width than the normal width as represented at the left-hand side of Figure 5. This wider trim stop is not usually a part of the mill constructed frame so that its use does not involve any change in standardized frame construction. The extender strip 64 may also be employed in connection with the structure shown in Figures 1 to 4 inclusive to deepen the recesses in the frame sides and to prevent outward removal of the sashes.

At the present time it is preferred that the

guide members

14 and 44 be of extruded aluminum construction and of relatively rigid character. However, they may be formed of sheet metal, for example as shown in Figures 11 and 12. As shown in Figure 11, a guide member 66 is formed of a single web of suitable sheet metal such as aluminum or bronze having a thickness of about .020 inch, the metal being folded upon itself to form a pair of flanges 67 similar to the flanges 51 of the extruded metal construction represented in Figure 8. The plies of metal which are in face-to-facerelation to form said flanges 67 may be welded, soldered or otherwise appropriately secured together, or suitable staples or the like indicated at 68, may be employed for that purpose. 1'

In Figure 12, a guide member 69 of two-piece construction is shown. As there indicated, the central web portion 70 of the guide member is of two-ply construc-' tion, one ply being integral with the rib formations 71 and the other ply being integral with the flange formations 72. The web portions of the two parts may be suitably secured together as by means of tubular rivet formations indicated at 73, which are similar to those above described and shown at 24 in Figure 4. Again, the tubular rivet 75 may be replaced by conventional separate rivets, by soldering or brazing or any other suitable form of attachment. In the construction shown in Figure 12, the part which comprises the integrally connected ribs 71 may alone be used as an alternative for the extruded, relatively rigid guide members 14 in Figures 1 and 5. The material employed for constructing the modified constructions shown in Figures 11 and 12 may be spring metal so that the rib portions which correspond to the

ribs

16 and 46 may be inherently yieldingly engaged with the sash side edges.

The construction shown in Figures 13 and 14 issuch that it provides a metal guide element 76 which extends continuously from the outer blind stop 3 to the inner trim stop 4 so as to provide a continuous or overall metal facing in the recessed area 77 between said blind and trim stops. This avoids any need for painting any portion of the wood surfaces which form said recess 77. By eliminating any need for painting the wood surfaces which form said recessed area 77, there is largely eliminated the cause of paint sealing or bonding the sashes in whatever position that they happen to be when the painting is done.

As shown in Figure 13, the guide member. 76 which extends across the full width of the recess 77 comprises a central web portion 78, a pair of tubular housings 79 located in such transversely spaced relation to each other as to be disposed approximately midway of the thickness of the sashes and 11, and outer web portion 80 which terminate in flanged edges 81. I The flanged edges 81 are adapted to ride on the inner surfaces 82 of the

stops

3 and 4. Suitable spring means 83 is interposed between the central web 78 of'the'guide strip and the frame side 2 to yieldingly urge the guide strip' toward the sash edges; In this instance, the spring'means is illustratedas consistingof a sheet metal spring member which is of Z- shaped cross section. Suitably located wood screws one of which is indicated at 84 are employed for anchoring the guide member 76 to the frame side 2. The screws 84 pass through suitable openings provided in the central web 78 and in the three web portions of the spring 83. In general, a pair of these screws 84, respectively located near the upper and lower ends of the guide strips are sufficient. As in the previously described constructions, the guide strip 76 and the spring member 83 extend the full length of the window frame opening and said spring member, bearing firmly against the guide strip 76 and against the frame side 2, may perform a weather stripping function. However, in this arrangement, the spring element 83 need not be depended upon for weather stripping purposes as in the Figure 1 arrangement, since the guide plate 76 traverses the entire width of the recess and thereby prevents the excessive flow of air between the guide plate and frame side 2 from the outside to the inside or vice versa. However, if the guide strip 76 is made a rather free fit between the

stops

3 and 4, the weather stripping effect of said spring plate may be an important function thereof.

The tubular housings 79 of the guide strip are adapted to receive sash counterbalancing coil springs 85 which, as shown in Figure 14, may be suspended from suitable ears such as indicated at 86 punched inwardly of said housings from the outer walls thereof. The lower ends of said springs are connected through the agency of suitable hangers such as 87 of the character already described, to the bottom of the respective sashes. The inner wall portions 79a of said tubular housings are longitudinally slotted as indicated at 79b to permit the passage of the platform portion of the hanger 87 from within the spring housing into position upwardly thereof for receiving the respective sashes substantially as shown in Figure 14. The side edges of the

sashes

10 and 11 are, of course, suitably recessed as indicated at 88 to receive said outer portions 79a of the tubular housings to thereby be guided for vertical movement by said housings.

It will be seen that in as much as the guide plate 76 is yieldingly urged against the edges of the sashes, effective weather tight engagement will be easily obtained between the sashes and said guide plate or strip and also that the sashes may be removed by procedure similar to that above set forth, as'an incident to the yieldable backing of the guide plate 76.

If a movable guide plate of the character shown in Figure 13 is employed at both sides of the frame, and such guide plate is yieldingly supported at both sides in the manner explained, it will be necessary to depress the guide plate at one side, a distance of only about J2 the distance that the slotted housing portion 79 projects into the sashes from the plane of the central web 78 and the marginal web portions 80. However, a fixed guide plate may be employed at one side of the frame for cooperation with a yieldingly supported guide plate such as the guide plate 76; in that event it will, of course, be necessary to depress the guide plate 76 a distance which corresponds to the extent of projection of the guide ribs at the other side of the sashes.

As shown in Figure 13 the depth of the recessed area 77 is somewhat greater than the depth of the recess in the arrangement shown in Figures 1 and 5. The provision of this greater depth in the arrangement shown in Figure 13 (while maintaining spring housings for the same size of springs as are employed in the arrangements shown in Figures 1 and 5) may be avoided by suitably recessing the frame side 2 as indicated in broken lines at 89 to receiveportions of the spring housings 79 when the guide member is depressed in the recess to facilitate removal of the sashes.

Thefull width metal guide element shown in Figure 13 is a highly desirable construction, but some builders and others maybe critical of the readily visible slots 79b. To avoid the use of such openly visible slots and to otherwise simplify the structure of the guide plate while maintaining the full width construction, the arrangement shown in Figure 15 may be employed.

In the Figure 15 construction, a full width guide plate or strip 90 comprises a central web portion 91, inwardly offset, approximately semi-circular spring housing formations 92, and outer marginal web portions 93 which terminate in edge flanges 94. This guide strip is yieldingly supported by means of a suitable spring arrangement such as the Z-formed spring 83 of Figure 13 so that said guide strip 90 is movable facewise in the recess 95 of the frame structure. Counterbalancing springs 96 are at least partially housed in said hollow ribs 92 and the lower ends of said springs are anchored to the lower ends of the guide strips, for example by engaging the lower end spring eyes over cars 97 which maybe punched outwardly from the walls of the housings 92 near the lower end of the guide strip. The upper ends of the springs 96 are respectively connected by suitable flexible cords 98 to the upper ends of the sashes and 11 in any suit able manner such as that indicated in Figure 16 which is similar to the common slot and knot connection used for connecting counter weight cords to the sashes in conventional double hung window constructions.

The counterbalancing cords 98 are guided around the upper ends of the guide plates 90, preferably by suitable non-abrading guide elements such as indicated at 99 which are seated in notches as best shown in Figure 17. The guide element 99 may be of suitable plastic material such as nylon or other -rnaterial which will provide a smooth surface over which the counterbalancing cords 98 may ride without significant resistance and without abrasive action. Guide rollers may, of course, be substituted for the guide elements, such rollers being mounted in the place of the elements 99.

The arrangement shown in Figures and 16 eliminates the visible open slot 79b of the Figure 13 construction so that the guide plate 90, in cooperation with the walls of the recess 95, provide a substantially closed housing for receiving the counterbalancing springs 96 and the supporting spring 83.

A continuous un-slotted guide plate such as the guide member 90 in Figure 15 may be employed as a fixed guide at one side of a window structure for cooperation with a guide member 76 of the type shown in Figure 13. The

guide member 90 of Figure 15 is somewhat easier to.

make than the guide member 76 in that it may be stamped or rolled from the sheet metal or extruded from suitable metal such as a suitable aluminum alloy, whereas the guide strip 76 of Figure 13 is most practicably produced by extrusion through an extruding die which is rather diificult and costly to manufacture and maintain. An extruding die for forming the guide structure 90 of Figwe 15 would be relatively simple and easy to manufacture, and correspondingly less costly. The strip 90 and the spring 83 in Figure 15 may be movably anchored to the frame side by screw means as described in reference to the mounting of the strip 76 and spring 83 in Figure 13 or in any other suitable manner.

Many changes in the details of construction and other modifications may be employed while retaining the principles of the described structure.

I claim:

1, A guide strip for slidably mounting a sash in a window frame, comprising an elongated member having a longitudinally extending central web adapted to slidably engage the edge of the sash, a pair of longitudinally extending, transversely arcuate ribs along the opposite edges of said central web, said ribs projecting in like directions from the plane .of said central web in position to slidably engage the edge of the sash, and a spring plate extending continuously for substantially the entire length of said guide strip and having a central portion engaging said central web of the guide strip substantially along its length and having oppositely extending wing portions extending outwardly from said central portion in spaced, opposed relation to said arcuate ribs.

' 2. Means for use in a double hung Window structure including upper and lower sashes mounted in a frame, comprising vertically extending guide means carried by the sides of the frame and cooperating with the respectively adjacent edges of said sashes for vertically slidably positioning the latter, the said guide means at at least one side comprising a vertically extending elongated guide member having a central web adapted to slidably engage the adjacent edges of said sashes, transversely arcuate ribs along the opposite vertical edges of said web, the convex sidesof said ribs being recessed into the adjacent side edges of said upper and lower sashes respectively for guiding vertical movement thereof, means mounting said guide member for transverse adjustment intermediatethe adjacent frame side and sash side edges, and a spring plate interposed between said guide member and the adjacent frame side and extending substantially the entire length of said guide member, said spring plate having a central portion engaging the central web of said guide member and having marginal wing portions offset from the plane of said web and continuously engaging frame side portions opposite to said arcuate ribs, said spring plate serving to yield-ingly urge said guide member ribs into frictional engagement with the respectively adjacent sash edges and also to seal the space intermediate said guide member and the adjacent frame side against significant air flow through said space.

3. Means for use in a double hung window structure including upper and lower sashes mounted in a frame, comprising vertically extending guide means carried by the sides of the frame and cooperating with the respectively adjacent edges of said sashes for vertically slidably positioning the latter, the said guide means at at least one side comprising avertically extending elongated guide member having a central web slidably engaging the adjacent edges of said sashes, transversely arcuate ribs along the opposite vertical edges of said web, the convex sides of said ribs being recessed into the adjacent side edges of said upper and lower sashes respectively for guiding vertical movement thereof, means mounting said guide member for transverse adjustment intermediate the adjacent frame side and sash side edges, a spring plate interposed between said guide member and the adjacent frame side and extending substantially the entire length of said guide memher, said spring plate having a central portion engaging the central web of said guide member along its length and having marginal wing portions offset from the Plane of said web and continuously engaging frame side portions opposite tosaid arcuate ribs, said spring plate serving to yieldingly urge said guide member ribs into frictional engagement with the respectively adjacent sash edges and also, through said engagement between said central portion of the spring plate and said central web of the guide member and between said wing portions and the frame side portions, to seal the space intermediate said guide member and the adjacent frame side against significant air flow through said space, and tension springs housed between said arcuate ribs and the Wings of the spring plate, said tension springs being connected at their upper ends to said guide member and at their lower ends to lower portions of the respectively adjacent sashes for counterbalancing the weight thereof.

4. Means for use in a double hung window structure including upper and lower sashes mounted in a frame, comprising vertically extending guide means carried by the sides of the frame and cooperating with the respectively adjacent edges of said sashes for vertically slidably positioning the latter, the said guide means at at least one side comprising a vertically extending elongated guide member having a central web slidably engaging the adjacent edges of said sashes, transversely arcuate ribs along the opposite vertical edges of said central web, the convex sides of said ribs being recessed into the adjacent side edges of said upper and lower sashes respectively for guiding vertical movement thereof, means mounting said guide member on said window frame for transverse adjustment intermediate the adjacent frame side and sash side edges, and a spring plate interposed between said guide member and the adjacent frame side for yieldingly pressing said guide member against said sashes, said spring plate extending substantially the entire length of said guide member and having a central portion including a pair of ribs continuously engaging the central Web of said guide member along its length and having marginal wing portions oifset from the plane of said web and continuously engaging frame side portions substantially along the length thereof at positions opposite to said arcuate ribs, said spring plate serving to yieldingly urge said guide member ribs into frictional engagement with the respectively adjacent sash edges and also to seal the space intermediate said guide member and the adjacent frame side against significant air flow through said space, said guide member and central spring plate portion being spaced from the adjacent frame side when said guide member is held against said sashes to permit said guide member to be moved toward the adjacent frame side through the agency of said sashes to an extent suificient to enable the remote side edges of the sashes to be withdrawn from their guide means and moved facewise out of the frame to facilitate withdrawal of their other edges from guiding engagement with said guide member.

5. A guide strip for slidably mounting a pair of sashes in a window frame, comprising an elongated member hav- 14 ing a longitudinally extending central web adapted to slidably engage edge portions of the sashes, a pair of longitudinally extending, transversely arcuate portions.

along the opposite edges of said central web, said arcuate portions projecting in like directions from the plane of said central web and adapted for positioning within edge grooves in said sashes, and a spring plate extending continuously for substantially the entire length of said guide strip and having a central portion attached to the central web of said elongated member, said spring plate includ ing a pair of similarly projecting spaced apart ribs on said central portion which extend continuously of the length thereof and engage said central Web, and said spring plate including oppositely extending wing portions extending outwardly from said ribs on said central portion in spaced, opposed relation to said arcuate portions.

References Cited in the file of this patent UNITED STATES PATENTS 278,469 Thompson May 29, 1883 2,270,315 Kreuger Jan. 20, 1942 2,303,129 Kurtz Nov, 24, 1942 2,307,647 Starck Jan. 5, 1943 2,619,690 Kinish Dec. 2, 1952 2,648,515 Weiss Aug. 11, 1953 2,677,156 Holmes May 4, 1954 2,740,171 McCubbin Apr. 3, 1956 2,772,449 Nicol Dec. 4, 1956 2,774,997 Zitomer Dec. 25, 1956 FOREIGN PATENTS 4,135 Great Britain Oct. 13, 1879