US1975187A - Window - Google Patents

Description

Oct. 2, 1934.` c. F. ABERLE ET AL WINDOW Filed Feb. 6, 1933 6 Sheets-Sheet l Oct. 2, 1934.

C. F. ABERLE ET AL WINDOW Filed Feb. 6, 1,953

6 Sheets-Sheet 2 6 Shets-Sheet 3 Oct. 2, 1934. c. F. ABERLE m- AL WINDOW Filed Feb. 6, 195s mhd da- MTW Oct. 2, 1934'. c. F. ABERLE ET Al.

WINDOW Filed Feb. 6, 1953 6 Sheets-Sheet 4 -wd www Oct. 2, 1934. c. F. ABERLE ET A1.

WINDOW Filed Feb. 6, 1953 6 Sheets-Shea?I 5 #en @wf Oct. 2, 1934.`

C. F. ABERLE El' AL WINDOW Filed Feb. 6, lss

6 ShetsLSheet 6 Patented Oct. 2, 1934 UNITED STATES PATENT OFFICE WINDOW Carl F. Aberle and Henry G. Aberle, l St. Louis, Mo.

` Application February 6, 1933, Serial No. 655,313

17 Claims.

This invention relates to windows, and has special reference to a new arrangement, combination and construction of parts forming the window sashes, and also has reference to a novel type and form of window frame in which the sashes are operatively mounted.

Objects of the invention are to provide improved upper and lower window sashes of `the vertically` sliding type and mounted in a window frame whereby the sashes are guided in their longitudinal movements; to provide novel guides whereby the sashes are guided in their movements; to provide improved joints between adjacent ends of the sashes and between the saslies and the window frame; to provide means for sustaining and supporting the window sashes in any one of numerous selected adjustments to obtain different types and effects of ventilation and air circulation; to provide a novel arrangement for obtaining an inwardly swinging movement of the sashes to expedite and facilitate the work of cleaning the window panes; to provide improved guides for the window sash weights which sustain and support the window sashes in their 26 different vertical adjustments and which are connected up with the window sashes in such a way that there is no interference or interruption with the free swinging movements of the window sashes for the purpose indicated; and to provide all of the other improved features of construction and arrangements of parts herein disclosed, reference being made to the annexed drawings, in which- Fig. 1 is a vertical sectional view of a window comprising upper and lower sashes and a frame in which said sashes are mounted.

Fig. 2 is a crosssectio-nal view of the window frame and one of the sashes, showing the construction and arrangement of the weight guides and other features.

Fig. 3 is an enlarged sectional View of one side of the window frame, showing more clearly the arrangement of the sash guides.

Fig. 4 is a side elevation of one of the movable members that operates in one of the sash guides.

Fig. 5 is a view looking toward one side edge of the device shown in Fig. 4, and showing the connection thereof with the window sash.

Fig. 6 is a vertical sectional view similar to Fig. l, the window sashes being omitted to disclose the guide devices.

Fig. 7 is a cross sectional view on the line '7-7 of Fig. 1, looking in the direction of the arrows.

Fig. 8 is an inner side view of the complete window, including sashes and frame .embodying the present invention.

Fig.' 9 is a vertical sectional View of the window frame, the sashes being omitted for comparison with Figs. 10 to 18, inclusive, which show various relative positions of the upper and lower window sashes.

Fig. 19 is a detail view showing the lower portion of the lower window sash in its raised position to permit outward swinging movement of the upper window sash when the latter is in its lowered position. Y

Fig. 20-is a cross lsectional view of the window frame on the line 20-20 of Fig. 19. v

Fig. 21 is a cross sectional view of the window frame on the line 21--21 of Fig. 19.

Fig. 22 is an enlarged detail view, showing the pivotal connection of the lower window sash with the frame.

Fig. 23 is a vertical sectional View of modified types of Window sashes and frame.

Fig. 24 is a crosssectional view of the window frame and the upper sash of this modified type.

Figs. 25 and 26 are side and side edge views, respectively, of the guide members pivotally connected with the lower ends of the window sashes.

Fig. 2'?` is an enlarged detail sectional view.' showing the guides for the guide devices.

Fig. 28 is a vertical sectional View similar to Fig. 23, the window sashes being omitted to show 'J the guides therefor.

Fig. 29 is a cross sectional view of the window frame, showing other features of the invention.

Fig. 30 is an outer side view of a complete window of this modied construction.

The window frame, shown in Figs. 1 to 22, inclusive, may be constructed principally of sheet metal shaped to form a bottom member having a downwardly and outwardly inclined portion 1 connected with an inner portion 2 by a raised 95 joint forming portion 3. The bottom of the window frame also'includes a section of inwardly extended sheet metal forming a lower wall 4 having its outer edge connected with the part 2.

and its outer marginal portion 10 extended upwardly and engaging the wall around the window opening. A bracing device, comprising a section of sheet metal 1l, is mounted above the members 6 and 9 and has its outer and inner edges engaging the upper edges of the extensions 8 and 10, respectively. An intermediate portion of the member 9 is swaged upwardly to provide a channel 12.

The two sides of the window frame are of duplicate construction and like reference numerals are applied to analogous parts of each. Each side of the window frame includes a section of sheet metal shaped and formed to provide an outer exposed portion 13 and an oiset inwardly extended portion 14. The outer edge of the portion 13 is engaged with the outer edge of a Vertical angular sheet metal member 15, the inner edge of which is connected with one edge of a vertical wall forming plate 16 having its inner edge attached to the inner edge of the part 14 of the frame. A partition plate 17 is attached to the member 15 and extends inwardly therefrom to separate and space apart and guide the window sash weights. l

A channel member 18 is attached to each of the parts 13 and constitutes guidesand joint forming members for the window sashes. A channel member 19, in alinement with and in continuation of the channel member 18, may be attached to the upper end portion 6 of the window frame to form ajoint at the upper end of the upper window sash.

A relatively wide channel plate 20 is attached to the upper portion of each side frame member 14 and is spaced inwardly from the guide 18 to permit the upper sash to pass between these guides 18and 20. A channel guide 21 is attached 'to the side frame member 14 and spaced inwardly from the guide 20, the space separating the guides 20 and 21 being approximately equal to the width of the channel 12 (Fig. 1). The lower ends of these guides 20 and 21 are slightly above the lower end of the upper window sash and above the upper end or" the lower window sash when the window isc'losed in order to permit inward swinging movement oi the lower window sash, as will be understood by reference to Fig. 1, and also permit inward swinging movement of the upper window sash when said upper window sash is in its down position, as will be understood by reierence to Fig. 18. An abutment guide member 22 is' mounted on a pivot 23 in connection with each side frame member 1'4 and is constructed so that the lower end thereof can be swung outwardly and upwardly from vertical position to the positions shown in Figs. 17 and 18, which will permit the upper end of either window sash to be swung inwardly when the window sash is in its `lower position. An elastic bumper 24, in connection with the outer side of the pivoted guide 22, constitutes an abutment for the upper end of either window sash to limit extent of in'- ward swinging movement of the window sash when the pivoted guide is in its vertical positends downwardly in continuation of the slots 27 and 28 and has an upwardly and inwardly curved end portion 30 separated from the slot 29 by a portion 31 of the side frame member 14.

A tubular guide 32 is attached to the outer side of the lower portion of the side frame member 14 and has a flange 33 projecting through the slot 27 along the inner edge of said slot in continuation of the inwardly extended flange 34 of an angle member attached to the side frame member 14 above the upper end of the slot 27 and between the guides 18 and 20. The flange 34 is separated from the outer edge of the guide 20 by an intervening space 35. f A curved tube 36 is attached to the outer side of each side frame member 14 and has an opening to the slot 28 analogous to the opening from the tube 32 to the slot 27.

The sash for the lower window comprises a channel member 37 forming the lower end of the sash and supporting a ilange or plate 33 adapted to seat upon the raised joint forming portion 3 at the lower end of the window frame and a downwardly extended fiange or strip 39 adapted to seat against the outer side of said raised portion 3 and form therewith an appropriate weatherproof and tight joint. A flange 40 extends upwardly rom the channel member 37.

The upper end of the lower sash includes an upwardly open channel member 41 having a downwardly extended ilange 42 in vertical alinement with the flange 40 (Fig. 1).

The two vertical side members of the lower sash are metallic channels having laterally extended outer flanges 43 adapted to engage against f the inner surfaces of the guides 18, and wider inner flanges 44 designed and adapted to operate close to the frame portions 14. These vertical channel members are rigidly connected with the ends of the sash member 37 and 41 to form a A strong window sash, and said vertical channel members are provided with ilanges 45 in alinement with the flanges' 40v and 42. Putty 46, appropriately applied to the sash including the flanges 40, 42 and 45, secures the window pane filat) side of the frame portions 14 and within the tubes i' o 36. These guide blocks support rollers 50, which operate against the side walls of the tubes 36 and thereby guide the lower sash in its upward and downward movements. Cords 5l extend over pulleys 52 rotatively supported by brackets 53 in the spaces between the partitions 17 and the plates 16 and are connected with weights 54 operative in said spaces. These weights will support the lower window in any of its raised positions and will facilitate and expedite the operation of the lower window. The upper end of the lower window may be swung inwardly against the bumpers 24 (Figs. 11 and l2), and the lower window may then be raised to any of the Ventilating positions shown in Figs. 13 to 16, inclusive. the guides 22 may be swung outwardly and upwardly to the position indicated in Fig. 17, and the lower window may be swung inwardly and downwardly onto the elastic supports 5 (Fig. 17) and the trunnions 43 engaged in the upwardly ex- Or L" tended slots against the abutment portions 31. In this way, the lower window will be supported in an approximately horizontal position and prevented from tilting by engagement of the trunnions 48 in the slots 30 and against the abut-v ments 31.

After the upper end of the lower window sash isswung outwardly against the bumpers 24, said lower window sash may be moved upwardly, the flanges 44 operating between the guides 20 and 21, as indicated in Figs. 2 and 7. In this upward movement of the lower window sash, the trunnions 48 move through the slots 29 and into and along the slots 28, the rollers 50 of the guides 49 operating against the walls of the tubes 36.

The upper window sash comprises a lower channel member having a depending outer flange 56 designed and adapted to lie against the outer side of the upper end member 41 of the lower sash (Fig. 1) and an inner flange 57 arranged to lie against the inner flange of said member 41. The upper end member of the upper sash comprises a channel member including an outer flange 58 forming joint with the guides 18 and i "i 19 and an inner flange 59 over1apping the upper frame portion 7 and extending into a space between said frame portion 7 and an attached plate l60. The sides of the upper sash are duplicates, each comprising a channel member jj having an outer flange 61 operating against the guides 18 and an inner flange 62 operating against the flanges 33 and against the outer sides of the guides 20. The lower member of the upper sash has an upwardly extended ilange 63 in alinement j` with a downwardly extended flange 64 in connection with the upper end member of the sash and inalinement with inwardly extended flanges 65 in connection with the side members of the sash. Putty 66, appropriately applied to these sash jmembers and to the flanges 63, 64 and 65, will form a hermetic joint and secure the window pane 67 in position.

Trunnions 68 project from the opposite ends of the lower member 55 into the slots 27 and are connected with guides 69, like the guides 49, and

i downwardly to the position previously occupied the various relative Ventilating positions to control circulation of Ventilating air, some of such positions being shown in Figs. 11 to 16, inclusive, and the path of the circulating air being indicated by arrows.

A closure plate may be mounted in the channel member 41 to prevent the lodgment of particles of foreign matter in said member 41.

The invention illustrated in Figs. 23 to 30, in-

I. .,clusive, varies somewhat in the form of the parts The upper frame member comprises a part 79 having along its outer edge a downwardly extended portion 80 connected with a joint forming portion 81 by a wallforming a groove 82 anda portion 83 connectingthe wall of the groove with said joint forming portion 81. The joint forming portion 8l has an extended portion 84 connected with a superimposed plate 85 to which the part 79 is also attached.

The sides of the frame are of duplicate con.-

struction, each comprising a portion 86 connected.,

clined slots 94, at the outer sides of which arev abutments 95.

Guides 96 are attached to the frame portions 86 parallel with and spaced from the joint forming parts 88, and other guides 97 are in rigid connection with the parts86 and spaced inwardly therefrom. At the lower ends of the guides 97,

we mount the pivoted guide members 22 in the.

manner already described.

Tubes 98 are attached to the outer sides of the lower portions of the parts 86 opposite the slots 91 and curved tubes 99 are mounted opposite l the slots 92.

The lower end members of both window sashes are alike, each comprising a tube 100 irregular in cross section having in its under side a groove 101 adapted to receive the upwardly extended joint forming portion 78 and having in connection with its outer side a downwardly extended flange 102. 102 of the lower sash cooperates with the upper wall of the upwardly extended joint forming porr tion 78 to form a weather-proof joint, while the` `downwardly extended flange 102 at the lower end of the upper sash cooperates with the upper end of the lower sash to form a tight joint. 103 extends along the upper side of each tube 100.

The upper end of the lower sash comprisesa tube 104 that is irregular in cross section and having on its inner side an upward'y extended flange 105 and along its inner edge a downwardly extended flange 106. attached to the under side of the tube 104 and spaced from the flange 106.

'Ihe side members 108 of both sashes are alike, each being in cross section an irregular tube having along its outer side a dovetail joint forming portion 109 for cooperation with the joint forming parts 99 to obtain weather-proof joints.

Each tube 108 has an inwardly extended flange` The tubes 108 of the lower sash are attached 110. to the ends of the tubes 100 and 104, respectively. The lower ends of the tubes 108 of the upper sash are attached to the end S 0f. the, tube 100 and The downwardly extended flangeA A groove An angular strip 107 the upper ends of said tubes 108 are attached to the ends of an irregular tube 111 having an extended portion 112 adapted to engage in the groove 82.

Window panes 113 have their lower edges embedded in putty in the grooves 1G?, and their vertical and upper edges held in place by fasteners 114 cooperating with the iianges 110 on the side members of the sash, and a similar flange 115 on the upper sash member 111 and with putty 116 applied as shown.

Trunnions 117 project from the ends of the sash members through the slots 91 and are pivotally connected with blocks 118 in the tubes 98 and 99 and equipped with rollers 119 to facilitate their operation. Window sash cords 120 are connected with the blocks 118 and extend over pulleys 121 and are connected with weights 122 operating in spaces at the sides of the window frame, as shown.

y These window sashes may be turned over to approximately horizontal positions to rest the panes 113 on the elastic supports 123, corresponding to the supports 5.

It is now clear that these window sashes of this modiiied construction may be moved to any of the relative adjustments and positions indicated in the annexed drawings in order to provide for ventilation and to control and direct the passage of the Ventilating air.

Our improved window and window frame may be made of any appropriate material, preferably of non-corrodiol-e metal or alloy, so as to provide an enduring construction. Better ventilating eiects may be obtained by directing and controlling the air currents than by use of windows of ordinary construction incapable of being adjusted and positioned as herein disclosed. The construction, arrangement and form or the parts may be widely varied within the scope of equivalent limits without departure from the nature and principle of the invention. We do not restrict ourselves in any unessential particulars, but what we claim and desire to secure by Letters Patent is:

1. In a window, a frame having upwardly diverging slots through opposite sides of the frame, sash guides in connection with said frame, vertically movable sashes mounted in said trame and 4 cooperating with said guides to form joints,

trunnions in connection with the lower end of each of said sashes projecting through said slots, guide blocks connected with said trunnions at the concealed sides of said frames, means other than said slots guiding said blocks, and window sash weights connected with said guide blocks for counterbalancing said sashes.

2. In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end opening into the lower ends of vertical slots and upwardly and inwardly inclined slots through opposite sides of the frame, guide elements attached to the concealed sides of said frame adjacent to said slots, upper and lower Window sashes mounted in said trame, trunnions in connection with the lower end of each of said sashes projecting through said vertical slots in the closed positions of said sashes, means in connection with said trunnions that project from the lower end of said lower sash for guiding said lower sash trunnions along said upwardly a-nd inwardly inclined slots, window sash weights at the concealed sides of said frame, and flexible connections connecting said weights respectively with said respective trunnions at the concealed sides of said frame.

3. In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end opening into the lower ends of vertical slots and upwardly and inwardly inclined slots through opposite sides of the frame, guide elements attached to the concealed sides of said frame adjacent to said slots, upper and lower window sashes mounted in said frame, trunnions in connection with the lower end of each of said sashes projecting through said vertical slots in thev closed positions of said sashes, means in connection with said trunnions that project from the lower end of said lower sash for guiding said lower sash trunnions along said upwardly and inwardly inclined slots, window sash weights at the concealed sides of said frame, flexible connections connecting said weights respectively with said respective trunnions at the concealed sides of said frame, and construction at the lower ends ot said vertical slots cooperating with said trunnions to support either of said sashes in inwardly extended position.

4. In a window, a metallic frame having a pair of slots through each side of the frame, each pair of said slots opening into a single downwardly and inwardly extended slot at the lower end of said frame, window sashes mounted in said frame and each composed of hollow metallic end and side members cooperating with said frame and with each other to provide sealed joints, trunnions projecting from the lower ends of said sashes respectively through said slots, window sash weights at the concealed sides of said frame operatively connected with said trunnions at the concealed sides of said frame, and movable abutments for supporting either of said sashes inclined inwardly and upwardly when the respecve sashes are at the lower end of said frame, said abutments being movable to permit said sashes to be swung inwardly and downwardly approximately to horizontal position.

5. In a window, a metallic frame having a pair of slots through each side of the frame, each pair of said slots opening into a single downwardly and inwardly extended slot at the lower end of said frame, window sashes mounted in said frame and each composed of hollow metallic end and side members cooperating with said 125 frame and with each other to provide sealed joints, trunnions projecting from the lower ends of said sashes respectively through said slots, window sash weights at the concealed sides of said frame operatively connected with said trunnions at the concealed sides of said frame, movable abutments for supporting either of said sashes inclined inwardly and upwardly when the respective sashes are at the lower end of said frame, said abutments being movable to permit said sashes to be swung inwardly and downwardly approximately to horizontal position, and construction at the lower ends of said slots cooperating with said trunnions and said weights to limit extent of upward movement of the lower ends or" said sashes when said sashes are in approximately horizontal position.

6. In a window, a metallic frame having slots in its opposite sides, the slots at each side of said frame opening at their lower ends into a single downwardly and inwardly extended slot, upper and lower sashes movable upwardly and downwardly mounted in said frame, projections in connection with said sashes extending through said slots to the concealed sides of said -frame, 150

and gudemeans on the concealed sides oi said frame cooperating with said projections to guide said sashes respectively in their upward and downward movements.

7.l In a window, a metallic frame having slots in its opposite sides, the slots at each side of said frame opening at their lower ends into a single downwardly and inwardly extended slot, upper and lower sashes movable upwardly `and downwardly mounted in said frame, projections in connectionwith said sashes extending through said slots to the concealed sides of said frame, guide means at the concealed sides of said frame for guiding said lower sash upwardly and inwardly with respect to said upper sash, and devices connected at the concealed sides of said frame with said projections that extend from said lower sash for supporting said lower sash in diierent positions with respect to said upper sash.

8. In a window, a metallic frame having slots in its opposite sides, the slots at each side of said frame opening at their lower ends into afsingle downwardly and inwardly extended slot, upper and lower sashes movable upwardly and downwardly mounted in said frame, projections in connection with said sashes extending through said slots to the concealed sides of said frame, guide means at the concealed sides of said frame for guiding said lower sash upwardly and inwardly with respect to said upper sash, devices connected at the concealed sides of said frame with said projections that extend from said lower sash for supporting said lower sash in different positions with respect to said upper sash, and

construction at the lower ends of said slots for cooperating with said projections on said respective sashes to support said respective sashes in inwardly extended positions.

9; In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end and each of said slots opening into two upwardly diverging slots, means holding thoseportions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of-the frame, vertically movable upper and lower sashes mounted in said frame, trunnions in connection with the lower end of each of said sashes projecting through said slots for movement therealong from and to positions in which said sashes are located one below the other, means for supporting said lower sash in a position in which the lower end thereof is above the plane of the upper end of the upper sash when the upper sash is in the lowermost position to which it is movable and in which the upper sash may be swung inwardly below and beyond the lower end of the lower sash.

10. In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end and each of said slots opening into two upwardly diverging slots, means holding those portions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, vertically movable upper and lower sashes mounted in said respectively.

11. In a window, a metallic frame having slots in its opposite sides, upper and lower sashes mov--v able upwardly and downwardly mounted in said frame, trunnions in connection with the lower ends of said sashes respectively extending through said slots to the concealed sides of said frame, sash weights at the concealed .sides of said framev connected with the trunnions at the concealed sides of said frame, said lower sash beingmovable upwardly to a position in which its lower endis above the upper end of the upper sash when the upper sash is in the lowermost position towhich it is movable, thereby leaving the upper sash free for inward swinging movement below and beyond the lower sash, and means for locking the upper sash in the position in which it is swung inwardly as aforesaid. l

l2. In a window, a metallic frame having a single downwardly and inwardly extended slot at each side of its lower end and havingtwo upwardly diverging slots opening into the upper end of each of said single slots, means holding those portions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, vertically movable upper and lower sashes mounted in said frame for adjustment in vertical alinement to close said frame, trunnions in connection with the lower end of each of said sashes projecting 'through said slots for movement therealong from and to positions in which said sashes are located in vertical alinement, sash weights at the concealed sides of' said frame connected with said trunnions at the concealed sides of said frame, and a raised porpery sash may enter the inwardly extended por-- tions ot said slots to lock said upper sash against upward movement.

13. In` a window, a metallic frame having a single downwardly and inwardly extended slot at each side of its lower end and having two upwardly diverging slots opening into the upper end of each of said iirst named slots, means holding those portions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, vertically movable upper and lower sashes mounted in said frame, trunnions in connection with the lower end of each of said sashes projecting through and movable along said diverging slots respectively into said inwardly extended slots to lock said sashes respectively against upward movement, and means at the concealed sides of said frame connected with said trunnions on said lower sash for supporting said lower sash in a raised position in which the lower end thereof is above the plane of the upper end of the upper sash when theupper sash is in the lowermost position to which it is movable and in which position the upper sash may be swung inwardly below and beyond the lower end of the lower sash and said trunnions on said upper sash extended into said inwardly extended slots.

14. In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end and having two upwardly diverging slots opening into the upper `ends of each of said single slots, means holding those porico said frame, trunnions in connection with the tions `oi the frame `which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, vertically movable upper and lower sashes mounted in said frame for adjustment in vertical alinement to close said frame, trunnions in connection with the lower end of each of said sashes projecting through said slots for movement therealong from and to positions in which said sashes are located in vertical alinement and to positions in which said trunnions are engaged in said downwardly and inwardly extended slots, sash weights at the concealed sides of said frame connected with said trunnions at the concealed sides of said frame, said lower sash being movable upwardly to a position in which its lower end is above the upper end of the upper sash when the upper sash is in the lowermost position to which it is movable, .thereby leaving the upper sash iree for inward swinging movement below the lower sash, and means for supporting the upper sash inclined inwardly below the lower sash when the upper sash is down and the lower1 sash is in its upper position.

15. In a window, a frame having diverging slots in its opposite sides, means holding those portions of the frame which are between said diverging slots in rigid relationship with the remainder of the frame, upper and lower sashes movable upwardly and downwardly mounted in lower ends of said sashes respectively extending through said slots to the concealed sides of said frames, sash weights at the concealed sides of said frame connected with the trunnions at the `concealed sides of said frame, said lower the upper sash free for inward swinging movement below and beyond the lower sash, and means for preventing upward movement of the Lavare? lower end of said upper sash when said upper sash is swung inwardly beyond the lower sash as aforesaid.

16. In a window, a frame having a single downwardly and inwardly extended slot at each side of its lower end and having two upwardly diverging slots opening into the upper end of each of said single slots, means holding those portions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, upper and lower sashes movable upwardly and downwardly mounted in said frame, trunnions in connection with the lower ends of said sashes respectively extending through said slots to the concealed sides of said frame, said trunnions on each sash being movable into said single slots when the other sash is out of the way, and window sash weights at the concealed sides of said frame connected with said trunnions at the concealed sides of said frame.

17. In a window, a frame having a single downwardly and inwardly extended slot at each Side of its lower end and having two upwardly diverging slots opening into the upper end of each of said single slots, means holding those portions of the frame which are between said upwardly diverging slots in rigid relationship with the remainder of the frame, upper and lower sashes movable upwardly and downwardly mounted in said frame, trunnions in connection with the lower ends or said sashes respectively extending through said slots to the concealed sides of said frame, said trunnions on each sash being movable into said single slots when the other sash is out of the way, and window sash weights at the concealed sides of said frame connected with said trunnions at the concealed sides of said frame, each of said sashes .being movable inwardly to approximately horizontal position when the other sash is in its upper position.

CARL F. ABERLE. HENRY G. ABERLE.

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