US2705350A

US2705350A - Windows

Info

Publication number: US2705350A
Application number: US276926A
Authority: US
Inventors: John C West; Christensen Olaf
Original assignee: PROTEX WEATHERSTRIP Manufacturing CO
Current assignee: PROTEX WEATHERSTRIP Manufacturing CO
Priority date: 1952-03-17
Filing date: 1952-03-17
Publication date: 1955-04-05
Anticipated expiration: 1972-04-05

Description

J. C. WEST ET AL WINDOWS A ril 5, 1955 3 Sheets-Sheet 1 FIG. 2

Filed March 17, 1952 OUTSIDE VIEW . INVEN'I'ORS JOH N C. WEST OLAF CHRISTENSEN TTORNEI April 5, 1955 J. c. WEST ET AL WINDOWS 3 Sheets-Sheet 2 Filed March 17, 1952 FIG. H

INI'EN'I'ORS JOHN C. WEST OLAFCHRIST NSEN JTTORNI'I Y April 5, 1955 J. 0. WEST El AL WINDOWS 3 Sheets-Sheet 3 Filec} March 17, 1952 FIG. l2

FIG. l4

INVEN'I'ORS JO HN C. WEST ATTORNEY OLAF CHiyNSEN United States Patent WINDOWS John C. West and Olaf Christensen, Chicago, 11]., as-

signors to Protex Weatherstrip Manufacturing Co., Chicago, Ill., a corporation of Illinois Application March 17, 1952, Serial No. 276,926

17 Claims. (Cl. 2056.1)

This invention relates to a window sash and particularly to a window sash having the panes thereof removably mounted in conventional sash.

In window sash that are slidably mounted in the window frame, or that are mounted as outwardly swinging casement-window sash, it has long been recognized that the cleaning of the outside surfaces of the Window pane is quite troublesome, and attempts have been made in the past to afford a sash of the aforesaid character wherein the pane may be removed from the normal frame structure of the sash. All such prior removable pane structures have been considered to be objectionable in many respects, either because of difficulty of manufacture, weakness in a structural sense, or lack of an effective weather-seal about the edges of the removable pane.

It is therefore an important object of the present invention to afford a removable-pane window sash that avoids the aforesaid objections, and objects related to the foregoing are to enable a removable pane structure to be readily and easily put in place in the usual sash frame so as to attain a weather-tight relationship. Another object is to afford a removable pane window of the aforesaid character which is effectively held in its mounted position so as to assure a weather-tight seal about the edges thereof and which nevertheless is readily and easily removable by means which in part serve to afford a handle for effecting such removal.

Another object of the present invention is to afford a frame structure for the pane of such a sash wherein a hollow rib which serves to receive the corner brackets also serves as a shoulder for locating the glass pane in such frame. Other objects are to afford structure in the removable frame to assure a proper and tight seal between the two frames, and to afford such a frame for the pane that provides an attractive appearance particularly on the inner side surface of the assembly.

Other and further objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings which, by way of illustration, show a preferred embodiment of the present invention and the principle thereof and what we now consider to be the best mode in which we have contemplated applying that principle. Other embodiments of the invention embodying the same or equivalent principle may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claims.

In the drawings:

Fig. l is an inside perspective view of upper and lower sash adapted for use in a conventional doublehung window installation and embodying the removable-pane structure of the present invention;

Fig. 2 is an outside view of the structure shown in Fig. 1;

Fig. 3 is an enlarged fragmentary portion of Fig. 2,

Fig. 4 is an enlarged fragmentary perspective view of the inside face of one of the removable pane structures shown apart from the sash frame;

Fig. 5 is a vertical sectional view taken substantially along the line 55 of Fig. 1;

Fig. 6 is a fragmentary portion of Fig. 5 illustrating the manner in which the removable pane is unlatched for removal;

Fig. 7 is a view similar to Fig. 6 and showing the removable panel partially rocked in an inward releasing or removing direction;

- Fig. 8 is a horizontal cross sectional view taken substantially along the line 8-8 of Fig. 1;

Fig. 9 is a fragmentary vertical sectional view show ing the lower portion of the side frame of the sash together with the associated stationary weather-strip;

Fig. 10 is a fragmentary bottom perspective view illustrating details of the latched mechanism;

Fig. 11 is a vertical sectional view taken substantially along the line 11-11 of Fig. 5 and illustrating further details of the latch mechanism.

Fig. 12 is an inside view of the lower panel frame illustrating details of the corner and corner bracket structure;

Fig. 13 is an outside view of the structure shown in Fig. 12;

Fig. 14 is a side or edge view of the structure shown in Figs. 12 and 13;

Fig. 15 is an outside perspective view of the lower panel frame;

Fig. 16 is a sectional view taken substantially along the line 16-16 of Fig. 13; and

Fig. 17 is a sectional view taken substantially along the line 17-17 of Fig. 14.

For purposes of disclosure the invention is herein illustrated as embodied upper and

lower sash

20 and 21 that are adapted for mounting in a conventional double-hung window arrangement and in which Sash 20 and 21 removable glass-

panels

20 and 21 removable glass-panels 20P and ZIP are respectively afliorded so that such glass-panels may be readily removed and replaced from the inside of the sash in connection with washing and cleaning operations. In most respects the frames of the upper and

lower sash

20 and 21 are formed and assembled in accordance with conventional practice, thereby to adapt the same for conventional mounting and balancing, and the essential differences in the sash frames is found in the internal edges of the frame elements which cooperate with the removable glass panels 20F and ZIP, as will be described hereinafter. Thus the upper sash 20 has side rails 205, a top rail 20T, and a lower or meeting rail 20M that are formed from wood and. joined in the conventional manner; while the lower sash has side rails 218, a lower rail 21L and an upper or meeting rail 21M, all of which are formed from wood and which are joined in the conventional manner. As will be explained in detail hereinafter, the glass panels 20? and ZIP are arranged to be removably fitted into the opening defined by the wood elements of the

respective sash

20 and 21, and in attaining this result, the inside edges of the wood elements have a special form as will be evident in Figs. 5 and 8 of the drawings.

Thus, as shown in Fig. 8, the side members 208 are formed with flat inner surfaces 20B that are parallel to the outer edges or faces 20A thereof, and this same form is used on the inner surfaces of the members 218. The lower member 20M also has a flat upper or inner surface 20M-1 that is parallel to the lower surface of this member, and the outside face 20M-2 of the member 20M is chamfered at its upper outside corner between the two planes of the surfaces 20B on the two adjacent side members 808. The upper member 20T has an inner or lower surface 20T-1, Fig. 5, that is parallel to the surface 20M-1, and which extends from the inside face of the member 20T to a downwardly projecting flange or lip 20T-2 that constitutes a depending stop member across the upper edge of the opening in the window frame, and which functions in affording a weather seal along the upper edge of the panel 20P as will be explained hereinafter. Similarly the member 21L has a flat upper surface 21L-1, an outside surface 21L-2 and a chamfered upper outside corner surface 21L-3 which correspond to the surfaces described in respect to the member 20M. The meeting rail 21M has its lower surfaces formed in a manner similar to the member 20T, thereby to afford a lower surface 21M-1 and a depending lip 21M-2 along the lower outside edge.

The removable glass panels The glass panels F and ZIP are each formed from a rectangular pane of glass P surrounded in each instance by a four-sided frame in which the panes P are secured, and the frames in each are formed from metal extru sions that will be described in detail hereinafter. The glass panel 20P has a frame 120P formed by a top member 120T, a bottom member 120B, and similar side mem bers 1208 that are joined together by corner bracket means as will be described. Similarly, the glass panel 21P has a frame 121P formed by a top member 121T, a bottom member 121B, and similar side members 1218 that are similarly joined together by corner bracket means.

The metal extrusions The side members 1208 and 1218 are formed from identical metal extrusions which are of the form shown in Figs. 4, 8 and 16, and this specific form will be described with reference to the member 1208. Thus, the member 1208 is formed as an extrusion having a flat plate-like body 121 with a flange 122 extended in one direction from the plane of the body along one edge thereof and at right angles thereto. The width of the body plate 121 is best shown in Fig. 8, where the flange 122 is engaged with the inside surface of the side frame member 208 while the body plate 121 extends along the face 20B of the member 208 and to a point aligned with the outside face of the member 208. The body plate 121 also has a glazing shoulder formed thereon by a hollow longitudinal rib 123 disposed between and in spaced relation to the edges of the body plate 121 so as to project therefrom in a direction opposite the direction of the flange 122. By reason of its hollow character, the rib 123 serves to receive the corner bracket means used to join the four side elements of the panel frame, as will be described, and the rib 123 is of substantially square cross section with a longitudinal slot 124 formed in one side thereof so as to facilitate the extrusion of the member 1208. This slot 124 is located in the side of the rib 123 that is remote from the flange 122, and it is against the slotted side of the rib 123 that the glass pane P is mounted, as will be described. The side surface of the body plate 121 that is opposite to the one on which the rib 123 is formed may be identified as face 125, Fig. 8, and this face is important in the forming of the elements of the panel frame in that the dimensions of the panel frame are measured along one such face and between corresponding faces of other elements in each instance.

The

bottom members

120B and 121B are formed from extruded members that are quite similar in cross section, the only difference between these two members being that the bottom member 121B has a flange similar to the flange 122 along its inner edge, while this flange is eliminated in the bottom member 120B. Thus, with respect to the bottom member 121B, a plate-like body member 221 is provided with a flange 222 along its inside edge so that this flange 222 may extend downwardly along the inside face of the cut element of the frame. On the other face of the body plate 221, a hollow longitudinal rib 223 is provided and this hollow rib has a slot 224 formed in its outside face so that the rib 223 corresponds in form and position with the rib 123 that has been described hereinbefore. The outside edge of the body plate 221 is formed with a downwardly projecting flange or a lip 226 the outside face of which is arranged so that when the member 121B is in position on the bottom frame member 21L this surface will lie in substantially the same plane as the surface 21L-2.

As above pointed out, the member 120B is substantially the same as the member 121B except that the flange 222 is eliminated. Thus the member 121B has a body plate 321, a hollow lip 323 having a slot 324 in its outside edge, and along the outside edge of the body plate 321 a downwardly projecting flange or a lip 326 is provided which engages and extends downwardly along the sloping surface 20M-3.

The

upper frame members

120T and 121T are identical in their cross section form, and these members will therefore be described specifically with respect to the member 120T. Thus the member 120T has a body plate 321 with an upperwardly extending flange 422 along its inside edge. The body plate 421 has a hollow rig 423 formed thereon and this rib has a longitudinal slot 424 in its outside face. This rib 423 is of the same form as the other hollow ribs that have been described, and it is spaced outwardly from the inside edge of the body plate 421 in the same distance. The member T has additional structure formed thereon which is somewhat different than the structure of the other extruded members. Thus, the upper surface of the body plate 421, as shown in Fig. 6, has an upwardly extending longitudinal rib 427 formed thereon, and this rib is of generally triangular cross section so as to afford an inwardly and downwardly sloping surface 427A and outwardly and downwardly sloping surface 427B. This surface 427B terminates at such a point that its lower edge will be engaged with the inner surface of the lip 20T-2 when the flange 422 is engaged with the inside surface of the member 20T. At its lower edge, the surface 427B merges with a downwardly extending lip 428 that terminates in a lower edge that is in the same plane as the lower edge of the rib 423, and this rib 428 is spaced from the outside face of the rib 423 so as to constitute a glazing groove into which the upper edge of a pane P may be inserted. When this is done, a material such as putty 429 is forced into the space between the lip 428 and the pane P so as to hold the pane P in engagement with the slotted face or side surface of the rib 423.

It will be noted that when the removable pane 20P is put in place in the wood sash, the outside face or surface 425 of the body plate 421 is spaced downwardly from the surface 20T-1 as will be evident in Figs. 5 and 6, and this spacing is sufficient to allow the rib 427 to move into position beneath the surface 20T-1 while at the same time being sufiiciently small to allow the upwardly projection of the flange 422 to overlie the inside surface of the member 20T for a short distance as shown in Figs. 5 and 6. The relationship of the parts is such that when the glass panel 20? is in its mounted position, the lower edge of the lip 428 is substantially aligned with the lower edge of the lip 20T-2, thus to afford a weather seal along the upper edge of the panel. Moreover, the angular rib 427 is utilized as a part of a locking means which removably holds the upper edge of the frame or panel 20F in position in the sash, as will hereinafter be described.

The cutting a nd forming of the extrusions In cutting the extruded members for the formation of a L framed glass panel, the extrusion that is to form the lower member of the frame is cut with mitered ends as at M so that the dimension or longitudinal length of the surface 225 is substantially equal to the spacing between the surfaces 20B of the two side members 205 of the cut frame. The upper member 120T is also cut so that the longitudinal dimension along the surface 425 is substantially equal to the space between the aforesaid surfaces 20B. As to the vertical length of the side members 120S that are to be prepared, the extrusion is cut with mitered ends M so spaced that the longitudinal dimension along the surface is somewhat less than the spacing between the surface 20M-1 and the surface 20T-1, this reduction in the dimension being in such an amount that the desired spacing of the rib 427 from the surface 20T-1 will be attained. The ends of the rib 427 will, of course, be cut in the same mitered relationship as the other elements of the upper members, but these end portions are thereafter cut away as in 427C, Fig. 15. Also, the upper ends of the body plate 121 are downwardly slotted at their upper outer corners as at so as to provide clearance, in the mounting of the finished frame, for the downwardly extending lip 20T-2 of the sash 20. It will be noted that this slot 130 extends downwardly for a suflicient distance to clear the lip 20T-2 during the re quired pivotal movement of the panel 20P.

Similarly when a glass panel is put in position in a sash, the ends of the depending lips 326, in either the upper panel or the lower panel, must clear the adjacent sides of the sash frame, and therefore the ends of these ribs 326 are cut off as indicated at 326C so that they will be located in substantially the plane of the side surface 1.25 of the adjacent side member 120$ when the frame has been assembled.

With particular reference to the upper sash panel 20P, it will be recalled that the lower member 1208 does not have a downwardly projecting flange along its inside edge, and for this reason, the lower end of the flange 122 on each side member is cut away at 122C, Fig. 4, so that it will be in the plane of the lower surface 225 of the member 1203 when the frame is assembled.

The assembly of the cut extrusions The extruded elements which have thus been cut and formed are then ready for assembly, and this is accomplished by means of corner brackets B that are formed as right angle members that may have the opposite arms thereof inserted into the open ends of the hollow ribs that meet at the adjacent corners of the frame. As shown in Fig. 17 of the drawings, such corner bracket B has a series of grooves 501 formed in the side surfaces thereof so as to aid in attaining the desired fixed relationship between the corner bracket B and the frame members that are connected thereby. In the present instance the corner brackets B are formed from an extrusion having a right angle cross section so that the grooves 501 are formed in the course of the extruding operation, and this extrusion is then cut at right angles to the axis thereof so that the arms of the resulting corner bracket B conform in cross section to the internal cross sectional form of the hollow ribs such as the rib 123. This relationship is such that the arms of the corner bracket B have a rather snug frictional fit within the hollow ribs, and after a corner bracket has been placed in the relationship shown in Figs. 12 and 17, the walls of the hollow ribs may be compressed against the sides of the bracket B by any suitable means to assure a firm grip of the walls of the ribs on thebracket.

After the frame has been put into its assembled rela-' tionship as above described, the glass pane P is mounted in position against the slotted outer faces of the several hollow ribs, and the space between the lip 428 and the pane P is filled with putty as the 429. About its other three edges, the pane P is held in place by putty 429A, as shown in Fig. 5, and this putty 429A takes the usual triangular cross section form.

The mounting and latching of the panels When the glass panel such as the panel 21? is to be put into position in the wood frame or sash, the lower edge thereof is placed upon the upper edge of the member 21L in the dotted line relationship shown in Fig. 5 of the drawings, and the upper edge of the panel 21F is moved outwardly so as to tilt the panel 21F to its position within the wood frame or sas'h 21. As an incident to this outward tilting movement, the upper edge of the panel 21P moves into a latched relationship with latch means that are mounted on the lower face of the meeting rail 21M. Such latch means are best illustrated in Figs. 5, 6, 7, and 11. Thus a metallic mounting plate 503 is adapted to be fixed in position on the surface 20T by means such as nails 504, and the plate 503 carries a leaf or bow type spring 505, one end of which is permanently secured to the plate 503 near one end thereof as by means of welding 506. The spring 505 extends longitudinally along the plate 503 and in a downwardly bowed form, and its other or left end as shown in Figs. 10 and 11, is slidably extended through a transverse slot 507 formed in the plate 503. The plate 503 and the spring 505 are so formed and proportioned that when the outer edge of the plate 503 is engaged with the inside edge of the lip 20T-2, Fig. 6, the outside edge of the spring 505 will be located over substantially the lateral mid-point of the sloping surface 427-A. Hence, when the panel 21P is moved with an outward tilting movement toward the upper member of the sash, the surface 427B will engage the spring 505 and will compress the same toward a flat shape, Fig. 7, so that the rib 427 may pass beneath the spring 505. Then after the rib 427 has passed beneath the spring 505, this spring will expand downwardly toward its normal shape and its outer edge will engage in surface 427A so as to lock the panel 20P in its mounted relationship.

When it is desired to remove the panel, the spring 505 is moved toward its flat relationship by means of an operating plunger 510 that passes through the plate 425 just inwardly of the hollow rib 423 and beneath the spring 505. The plunger 510 has a cross bar 511 at its upper end that limits downward movement of the plunger 510, and this cross bar also serves to engage and release the spring 505, as shown in Fig. 11. At its lower end the plunger 510 has a relatively large head 512 that may be engaged by the user in the manner shown in Fig. 6 to actuate the plunger 510 upwardly and thus release the spring 505 as shown in Fig. 6. The head 512 may then be utilized as a handle means for imparting the desired inward swinging movement to the upper edge of the glass panel.

When the glass panel is in position within a sash frame the lip 20T-2 extends downwardly past the lip 428 to afford a weather seal along the upper edge of the glass panel. At the bottom edge of the glass panel 20F, the lip 326 extends downwardly along the sloping outer surface 20M3 of the meeting rail 20M to afford a weather seal along this edge. The same general situation prevails in respect to the lower sash. With respect to the side edges of the glass panel, an efifectual Weather seal is afforded in each instance by a metal L-strip 515 that has its larger flange secured by nails 516 to the outer face of the side members of the sash, and its other or smaller flange 515F is arranged to extend around and embrace the outer edge of the body plate of the sash panel. It will be observed that the L-strips 515 butt against the lower face of the lips 20T-2 and 21M-2, and that their lower ends are terminated in a slightly upwardly spaced relationship with respect to the upper surfaces of the

members

221 and 321 so as to afford clearance between the flanges 515F and the

members

221 and 321 during the tilting of the glass panels in the mounting and dismounting of the glass panels. As will be evident in Fig. 5, the putty 429 has its triangular form so proportioned as to leave a suflicient width of the body plate 121 uncovered to afford clearance for the flanges 515F.

In the present specification the terms outside and inside have been used to denote the weather face and room face respectively of the sash, while the term inner has been used-to denote the faces of the sash members closest to the center of the sash such as the face 125, and the term outer has been used in a sense opposite to the term inner.

From the foregoing description it will be apparent that the present invention provides a removable pane window sash that enables the window pane structure to be readily and easily placed in the usual frame so as to attain weather-tight or sealed relationship around the meeting edges of the pane structure and the normal sash frame. It will also be evident that the present invention affords a removable window pane structure which is effectually held in its mounted position, and yet may be readily and easily removed so that the window pane may be Washed on its outer surface. Under and in accordance with the present invention the removable pane structure is held in place in the sash frame by means which embody a releasing member which releases the spring latch and which also serves as a handle means to facilitate the removal of the pane from the sash frame. The removable pane structure of the present invention is of such a character that it may be moved quickly and easily into its mounted position, and when it is so moved with its mounting or inserting movement, it attains a weathertight or sealed relationship with respect to the sash frame. It will also be evident that the present invention affords an arrangement wherein the hollow rib member that serves to receive the corner brackets for assembling the frame serves also as an element for locating or positioning the window or glass member in the frame structure.

Thus, while we have illustrated and described the preferred embodiment of our invention, it is to be understood that this is capable of variation and modification, and we therefore do not wish to be limited to the precise details set forth, but desire to avail ourselves of such changes and alterations as fall within the purview of the following claims.

We claim:

1. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, means on said side members affording flanges projecting from the outside faces thereof for a short distance along and in spaced relation to said inner faces of said side members, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of said lip of said top member, and means acting between said top member and said top element to releasably hold said panel frame within said opening.

2. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, L-strips secured to said side members along their outside faces and having flanges projecting for a short distance along and in spaced relation to said inner faces of said side members, a panel frame comprising top, bottom and side elements formed as metal extrusions, each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of said lip of said top member, and means acting between said top member and said top element to releasably hold said panel frame within said opening.

3. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, L-strips secured to said side members along their outside faces and having flanges projecting for a short distance along and in spaced relation to said inner faces of said side members, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, the inside edges of all of said elements lying substantially in a common plane and said upper elesaid top member and said top element to releasably hold said panel frame within said opening.

4. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, L-strips secured to said side members along their outside faces and having flanges projecting for a short distance along and in spaced relation to said inner faces of said side members, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, the inside edges of said top and side elements having flanges thereon arranged to overlie the bordering portions of the inside faces of said top and side members, said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of said lip of said top member, and means acting between said top member and said top element to releasably hold said panel frame within said opening.

5. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, L-strips secured to said side members along their outside faces and having flanges projecting for a short distance along and in spaced relation to said inner faces of said side members, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of said lip of said top member, said top element having an upstanding longitudinal rib on its upper surface, a spring latch on the lower face of said top member for engaging said last mentioned rib to hold said panel in said opening, and a latch releasing handle carried on said top element.

6. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, a panel frame comprising top, bottom and side elements each having a flat body plate having inner and outer faces and with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, the ends of said downward flange being cut to lie in the planes of the outer faces of said side elements, said upper element being of a width less than the Width of the other of said elements, and the height of said side elements being such that said top element will be located inside of and in abutment with said lip of said top member, a spring latch on said top member, and said top element having rigid means thereon engageable by said spring latch to releasably hold said panel frame within said opening.

7. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, a panel frame comprising top, bottom and side elements each having a thin flat body plate with a longitudinal hollow rib extendin along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, the inside edges of all of said elements lying substantially in a common plane and said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of said lip of said top member, means acting between said top member and said top element to releasably hold said panel frame within said opening, and sealing means on said side members at the outside face thereof to engage the outside edges of the body plates of said side elements to afford a weather seal therealong.

8. In a removal-pane window sash, a sash frame having connected side top and bottom members having inner faces defining a rectangular panel-receiving opening, said top member having a depending lip extended along the outside edge of the inner face of said top member, and the outside face of said lower member being formed with a chamfered upper corner, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge to overhang said chamfered corner of said lower member, the inside edges of said top and side elements having flanges thereon arranged to overlie the bordering portions of the inside faces of said top and side members, said upper element being of a width less than the width of the other of said elements, and the height of said side elements being such that said top element will be located inside of and in engagement with said lip of said top member, and means for releasably holding said panel frame within said opening.

9. In a removal-pane window sash, a panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, cor ner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge, said top element being of width less than the width of the other of said elements, and said top element having an upstanding longitudinal rib of triangular cross section on its upper surface, and a latch releasing handle carried on said top element.

10. In a framed glass panel adapted to be removably mounted in a window sash of predetermined thickness, 21 panel frame comprising top, bottom and side elements each having a flat body plate having inner and outer faces and with a longitudinal hollow rib extending along its inner surface, and said elements being mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge, the ends of said downward flange being cut to lie in the planes of the outer faces of said side elements, all of said elements having one edge thereof lying on a common plane and said upper elements having its other edge set in from the corresponding inner edges of said other elements so as to be of a width less than the width of the other of said elements, said other elements having their body plates of a width corresponding to the aforesaid thickness of the sash in which the panel is to be mounted, and said top element having rigid means thereon engageable by said spring latch to releasably hold said panel frame within the opening of such a sash.

11. In a removal glass-supporting panel frame for a window sash, said panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner face, and mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge, and all of said elements having their inside edges disposed in a common plane, said upper element being of a width less than the width of the other of said elements, said upper element having a longitudinal rib or triangular cross section thereon and projecting upwardly therefrom, said triangular rib terminating at its outside lower edge in a depending lip spaced from said hollow rib of said upper element to cooperate therewith in affording a downwardly opening glazing groove in said upper element, and said triangular rib having the ends thereof cut parallel to each other and in the planes of the respective outer faces of the body plates of the two side elements.

12. In a removal glass-supporting panel frame for a window sash, said panel frame comprising top, bottom and side elements each having a flat body plate with a longitudinal hollow rib extending along its inner face, and mitered at their ends to form mitered corner joints, corner brackets extended into and secured in said hollow ribs, said bottom element having a downward flange along its outside edge, and all of said elements having their inside edges disposed in a common plane, said upper element being of a width less than the width of the other of said elements, said upper element having a longitudinal rib of triangular cross section thereon and projecting upwardly therefrom, said triangular rib terminating at its outside lower edge in a depending lip spaced from said hollow rib of said upper element to cooperate therewith in affording a downwardly opening glazing groove in said upper element, and a latch operating handle on said top element between the hollow rib and the inside edge thereof.

13. An elongated metallic member for use in forming a frame for a window pane, said member comprising, in cross section, a flat body plate having a right-angular flange along one edge and projecting from one face of said body plate, a triangular rib formed on said face along the other edge of said body plate and having a lip extended therefrom at the edge of the triangular rib that is remote from said flange and in a direction opposite to the direction of said flange, and a hollow rib formed on the other face of said body plate substantially opposite said triangular rib and spaced from said lip to de- 111];6 a glazing groove between said lip and said hollow r1 14. An elongated metallic member for use in forming a frame for a window pane, said member comprising, in cross section, a flat body plate having a right-angular flange along one edge and projecting from one face of said body plate, a second flange formed along the opposite edge of said body plate and projecting in the same direction as said first mentioned flange, said second flange having a tapering cross section such that it becomes progressively thinner toward its edges, and a hollow rib formed on the other face of said body plate in spaced relation to the edges of said plate and having a slot in the face that is adjacent said second flange, said metallic member having mitered ends exposing said hollow ribs at either end of said metallic member to permit corner brackets to be mounted therein whereby other like meallic members may be assembled therewith in a window rame.

15. An elongated metallic extrusion for use in forming a frame for a window pane, said extrusion comprising, in cross section, a flat body plate having a right-- angular flange along one edge and projecting from one face of said body plate, a triangular rib formed on said face along the other edge of said body plate and having a lip extended therefrom at the edge of the triangular rib that is remote from said flange and in a direction opposite to the direction of said flange, and a hollow rib formed on the other face of said body plate substantially opposite said triangular rib and spaced from said lip to d %fine a glazing groove between said lip and said hollow r1 16. An elongated metallic extrusion for use in forming a frame for a window pane, said extrusion comprising, in cross section, a flat body plate having a right-angular flange along one ed e and projecting from one face of said body plae, a second flange formed along the opposite edge of said body plate and projecting in the same direction as said first mentioned flange, said second flange having a tapering cross section such that it becomes progressively thinner toward its edges, and a hollow rib formed on the other face of said body plate in spaced relation to the edges of said plate and having a slot in the face that is adjacent said second flange.

17. An elongated metallic member for use in forming a frame for a window pane, said member comprising, in cross section, a flat body plate having a right-angular flange along one edge and projecting from one face of said body plates, and a hollow rib of square form projecting on the other face of said body plate in spaced relation to the edges of said plate and having an undercut slot in the face that is opposite said flange and with the slot facing in a direction away from said flange.

References Cited in the file of this patent UNITED STATES PATENTS 908,394 Corbeille Dec. 29, 1908 1,404,025 Higby et al, Jan. 17, 1922 1,929,692 Johnson Oct. 10, 1933 1,987,757 Snyder Jan. 15, 1935 2,023,047 Ganoe Dec. 3, 1935 2,081,722 Weinzierl May 25, 1937 2,187,078 Grigsby Jan. 16, 1940