US 2209384 A
Description (OCR text may contain errors)
Filed Sept. 6, 1938 2 Sheets-Sheet l Hill! ATTORNY July 30, 1940. v BROWN 2,209,384
EXTERIOR VENETIAN BLIND Filed Sept. 6, 1938 2 Sheets-Sheet 2- INVENT R Lemaa/ 6. row/r ATTOR'NEY Patented July so, 1940 UNITED STATES 2.20am sx'raaroa vENarmN BLIND Lemual G. Brown, Oklahoma City, Okla., assignor to Pioneer Manufacturing Company, Oklahoma City, Okla., a corporation of Oklahoma Application September 6, 1938, Serial No. 228,529
This invention relates to Venetian blinds particularly adapted for mounting on the exterior side of a window. It is known that blinds when so mounted reflect heat of the sun away from 6 the-window and that the interior of the room may be kept cooler without excluding the light and ventilation, however, such mounting of Venetian blinds has not been popular because of lack of installation space, interference thereof 10 with the usual window-screens, inconvenience of window washing, annoyances caused by rattling and banging thereof in the wind, insecure mount-- ing methods, dimcult and ineflicient lever control mechanisms, and many other reasons.
The principal objects of the present invention are, therefore, to provide an exterior Venetian blind especially contrived to overcome these difficulties and which is easily and securely installed as a unit within the frame of a window-screen; 8 to provide a louver control mechanism that securely and efficiently retains the louvers in ad- Justed position without interference of the window-sash and which is easily operated from the interior side of the screen; and to provide a control mechanism that cannot be operated from the outer side of the building.
A further object of the invention is to provide a window-blind structure equipped with a mounting that compensates for variation in size 30 and any oif-alignment or out of squareness of the window-screen frame.
In accomplishing these and other objects of the invention, as hereinafter described, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:
Fig. 1 is a perspective view of the exterior side of a window equipped with a Venetian blind structure embodying the features of the present invention.
Fig. 2 is a vertical section through the window and the Venetian blind structure showing the operating lever extension for the louver control mechanism in functional position.
Fig. 3 is a fragmentary perspective view from the interior side of the window showing the extension lever out of operative position to clear the window-sash, a portion of the wire screen- 50 ing being broken away to show the louvers.
Fig. 4 is a horizontal section through the window-screen and Venetian blind structure on the line 4-4 of Fig. 2.
. Fig. 5 is a detail fragmentary view of one end 55 of adjacent louvers and their mounting strip by which they are attached to the stiles of a window-screen.
Fig. 6 is an enlarged fragmentary detail view of the louver control mechanism showing the operating lever in inoperative position.
Fig. '7 is a detail perspective view of the parts 7 of the control mechanism shown in disassembled spaced relation.
Fig. 8 is a fragmentary vertical section showing a modified form of louver control mechanism. Fig; 9 is a horizontal section on the line 9-9 of Fi 8.
Referring more in detail to the drawings:
l designates a standard window-frame including side and header iambs 2 and 3, and a sill 5, the jambs being provided with the usual window and parting stops 6-1 and a blind stop d that is interposed between the exterior side edges of the jambs and outer casings 9 and II. Slidable in the ways i2 and i3 formed between the respective stops are the upper and lower windowsash "-45. The outer side of the blind stop 8 usually seats the frame of a window-screen i6 and is inset within the outercasing as shown in Fig. 2. The frame of the screen consists of side stiles l1 and I8 connected at their upper and lower'ends by cross rails l9 and 20, to which the wire screening 2! is attached and the edges covered by a moulding 22.
In carrying out the present invention the Ve- -netian blind structure is mounted as a unit and is attached to the frame of the window-screen. For this reason the window-screen is placed within the window-frame with the screen side facing the sash, as shown in Fig. 2, whereby the Venetian blind structure may be partly inset within the confines of the frame thereby limiting projection of the louvers. I
The Venetian blind structure includes a plurality of transversely arranged louvers 23,'preferably of sheet metal, and formed of strips substantially conforming in width to a standard Venetian blind louver and having theirupper and lower edges bent retractively on their inner side faces, as indicated at 24 and 25, the bending of the lower edge 25 being such as to provide a drip bead 26. The ends of the strips are flanged laterally on the lower or inner faces thereof to form substantially angular wings 21 and 28 for pivotal attachment to mounting strips 29 and 30 and for connection by a bar 3|.
The mounting strips 29 and 30 are preferably angles arranged with one flange 32 adapted to overlap the outer faces of the stiles l1 and ll and their other flanges 33 extending inwardlyin overlapping relation with the inner side edges of the stiles to provide right angular flange portions on which the louvers are pivotaily mounted as best shown in Fig. 4.
The angular or lateral wings 21 of the respective louvers are positioned closely to the inner faces of the flange portions and are pivotally secured thereto by rivets or similar trunnioning devices 34 having heads 35 engaging against the wings and shanks 36 extending through openings 3'! therein and through registering openings 38 of the flanges 33. The shanks of the fastening devices may be of sumcient length to accommodate relatively thin washers 39, between the faces of the wings and flanges 33, and to. project so that the ends thereof may be riveted over the faces of the flanges. The fastening devices are drawn sufflciently tight to eliminate play but are loose enough to allow free tilting movement of the louvers responsive to reciprocation of the bar 3|. 4
The connecting bar 3| is attached to the wings at one end of the louvers by pivotal fastening devices 40 in the same manner as the pivots just described at points spaced from the adjacent flange portion 33 when the louvers are horizontal to accommodate movement of the bar when the louvers are shifted, since the bar, when thus at tached, is substantially in the plane of the flange portion 33.
In order to avoid necessity of providing a. greater variety of louver lengths to accommodate every size of screen opening, the louvers for a given size window are sufliciently short to flt the smallest screen opening, and the attaching flanges 32 of the mounting strips are sufliciently wide to compensate for any variation in the width of the window-frame opening for a given size window. A louver structure is, therefore, selected having such width that the flanges 33 freely enter the frame opening and any spacing between the flanges and the adjacent inner edges of the frame or any irregularity or out of squareness of the frame is taken care of and covered by the attaching flange of the mounting strips, as shown at 4| in Fig. 4. To accommodate variation in height of the screen opening, the mounting strips are made of ample length so that an end thereof may be cut off according to the height of the frame opening.
A weather-shield 42 is attached to the lower edge of the upper cross rail of the screen frame as shown in Fig. 2. The weather-shield is also preferably formed of sheet metal and projects outwardly from the frame and terminates in a downwardly inclined outer portion 43 having a drip edge 44. The weather-shield may be attached by fastening devices such as screws 45 threaded through openings in the edges thereof and into the edge of the frame.
The louver control and adjusting mechanism constitutes an essential part of the'present invention and renders the louver structure just described feasible for exterior installation as now to be described.
A preferred form of control mechanism is illustrated in Figs. 4 to '7 inclusive and includes an angle-shaped bracket 48 having one flange 41 extending under the screen moulding and secured at the lower end to the inner side of one of the side stiles of the screen frame, the attaching flange 41 being of ample width so that the other flange 48 extends outwardly over the window-screen slightly beyond the plane of the louver wings at that side of the window. The
attaching flange 41 may be secured by fastening devices driven through the screen moulding. through openings 49 into the body of the screen frame. The attaching flange 41 has a slotted opening 50 of ample dimensionsso that a lever 6 arm 5| will operate freely therein.
The lever 5| includes an arm portion 82 having spaced openings 53 and 54 through which the shanks of the fastening devices 34 and 40 of an adjacent louver are projected, the fastening devices 34 forming a fulcrum on which the lever pivots whereby the outer end of the lever causes the louvers to pivot in changing the angular positions thereof. The lever also includes an arm 55 extending at an angle with respect to the arm 52 and which projects through a slot 58 formed in the screen in registry with the slotted opening 50 of the bracket 48.
In order to close the slotted openings 58 and 58, a cover strip 51, having an opening 88 therein, is carried on the inwardly projecting arm of the lever and slides freely between the screen and the adjacent face of the bracket upon movement of the lever. The closure strip 51 is preferably moved in guided relation with the bracket by means of a lateral flange 58 thereon engaging against the flange 48. The arm 55 of the lever has an opening 60 registering with an arcuate slot 8| in the flange 48 to accommodate a clamping mechanism whereby the lever is anchored to retain the louvers in a selected position.
If the arm 55 of the lever were constructed of suflicient length to provide for ease of operation it would interfere with raising and lowering of the lower sash. I therefore provide a lever extension 82 which has lost motion connection with the clamping device and is adapted for removable coupling engagement with the terminal end of the arm 55. For this reason the terminal end of the arm 55 has a notch 63 adapted to be engaged by a stud 64 on the adjacent face of the lever extension 62, the stud 64 being spaced from a slot 65 in the lever extension. The clamping device includes a bolt 86 having a shank 81 extending through the slot 85 of the lever exten- 5 sion, through a spacing washer 88, through the opening 60, through clamping washers 63 and II respectively engaging the opposite sides of the flange 48 of the bracket and a wing nut 'Il whereby the parts are drawn into rigid assembly when the louvers are to be retained in selected adjusted position.
The modified form of control mechanism shown in Figs. 8 and 9 includes a gear segment 12 having a hub 13 fixed to a trunnion 14 replacing one of the fastening devices 34. The periphery of the gear segment is attached by the fastening devices 40 to the louver flange and is adapted for oscillation on the trunnion in effecting adjustment of the louvers by a worm 15. The worm I5 is fixed to a shaft 16 that is journalled in an ear 1'! on the mounting strip and in an escutcheon plate I8. The plate 18 has a slot 19 to accommodate the gear segment and is of sufficient size to cover up the screen slit necessary in passing the periphery of the segment to connect with the pivot 40. The inner end of the shaft 16 carries a crank by which the worm is rotated to effect adjustment. In this structure the pitch of the worm is sumcient to retain the louvers in adjusted position.
In assembling the Venetian blind structure, the louvers are attached to the mounting strips and connected at one of their ends by the bar 3|. the operating lever 5| being attached to the 75 fastening devices securing one of the lowermost louvers. The unit is then packaged with a weather-shield l2. and the various fittings com- V posing the raising and lowering mechanism.
' Fig. 2.
The mounting strips, having been constructed of ample length, are then cut to correspond with the height of the window-screen opening. The
assembled unit is then applied to the windowscreen frame so that the attaching flanges 32 overlie the outer faces of the side stiles |'I|I and the flanges 33 project in the direction'of the window-screen, a slot having just been provided through the wire screen to pass the notched end of the operating lever 5|. Fastening devices, such as screws or nails are then driven through openings 32' in the attaching flanges and into the stiles of the frame. The closure strip 51 is then sleeved over the operating lever, followed by the bracket 46 which is attached in proper position on the adjacent stile of the screen frame. The extension arm 62 of the lever, spacing washers 68, and clamping washers 69 and III, are then placed in the proper position with the openings therein registering with the slot Si and opening 60 of the lever arm. The shank 61 of the bolt 66 is then passed through the respective openings and the wing nut applied to the projecting end thereof, completing the assembly.
In inoperative position the extension arm 62 will be in vertical position as shown in Fig. 6. Therefore, to adjust the louvers the wing nut II will be loosened so that the lever arm extension may be swung on the shank of the bolt 66 to bring the stud 64 into registery with the notch 63, the slot 65 being of sumcient length to allow the stud 64 to clear the notched end of the operating lever. notch the lever arm extension is moved retractively to cause the stud to enter the notch. The lever arm extension is then operatively connected with the lever 5! so that the lever may be swung on its pivot 34 to adjust angular position of the louvers. When the louvers are in desired position the lever arm extension is shifted to withdraw the stud 64, whereupon the extension arm is dropped to perpendicular position, as shown in Fig. 6, after which the wing nut H is retightened to draw the clamping washers into contact with the respective side faces of the flange 48. When the louvers are thus retained they are rigidly supported so that they are not afiected by the wind blowing thereagainst. Since the louvers are mounted on the exterior side of the window-screen they reflect heat of the suns rays and keep them from passing into the interior of the building. The louvers, however, when opened, allow free circulation of the air therebetween to provide the desired ventilation. This movement of the air alsokeeps the louvers in cool condition and free of any accumulated heat that is not reflected therefrom.
From the foregoing it is obvious that I have provided an exterior Venetian blind structure which is readily assembled within a standard window-screen and which is removable with the screen as a unit for washing of the windows and other purposes. It is also obvious that the louver control mechanism does not interfere with slid- When the stud is in registry with the ing movement of the sash, and that there is sufficient leverage to provide facile adiustmen of the louvers.
Attention is directed to the fact that since the clamping nut II is on the inner side of the screen, it cannot be reached by an unauthorized person from the exterior side of the building. Therefore, when the louvers are once set and the nut II tightened, adjustment thereof cannot be changed from the louver side of the screen. It is obvious that when the louvers are moved to closed position the flanges at the ends thereof close. any space which may occur at the ends of the louvers and that the drip beads 26 of one louver will overlap the edge 24 of an adjacentlouver to exclude dust, snow and other elements. What I claim and desire to secure byletters Patent is:
1. An exterior Venetian blind including side stiles adapted for attachment to opposite sides of an opening in a supporting frame, said side stiles having flanges arranged at substantially right angles to the plane of said frame, a'plurality of vertically spaced louvers bridging the opening between said flanges and each having a rear marginal edge and a front edge forming a drip adapted to close against the rear marginal edge of an adjacent louver, wings extending laterally from inner faces of said louvers substantially across the width of the louvers at the respective ends thereof and in close relation with the facing sides of said flanges, an actuating barextending across'the flange side of the louvers at one side .of the frame and-in substantially the plane of the flange atthat side of the frame, trunnions connected with the wings at points spaced from saidinner faces of the louvers in substantial registry with said rear marginal said wings "with the bar, and means for recipro-- eating thebar to simultaneously pivot all of said louvers on the trunnions. 1
2. An exterior Venetian blind including a frame having side stiles, angle-shaped strips having lateral flanges overlapping outer faces of the side stiles and having right angularly projecting flange portions, a plurality of louvers arranged between said flanges and each having a rear, marginal edge and a front edge forming a drip adapted to close against the rear marginal edge of an adjacent louver in closed position of the louvers, wings extending laterally from inner faces of said louvers substantially across the width of the louvers at the respective ends thereof and in close relation with the facing sides of said flanges, an actuating bar extending across the flange side ofthe louvers at one side of the frame and in substantially the plane of the flange at that side of the frame, trunnions connected with I the wings at points spaced from said inner faces of the louvers in substantial registry with said the louvers are in closed position with the front edge of one louver overlapping the rear marginal edge of an adjacent louver, pivot members connecting said wings with the bar, and means for reciprocating the bar to pivot all of the connected louverson their respective trunnions.
3. An exterior Venetian blind including side stiles adapted for attachment to opposite sides of an opening in a supporting frame, said side stiles having louver supporting flanges arranged at substantially right angles to the plane of said frame and lateral attaching flanges for attachment to the supporting frame, a plurality of louvers bridging the opening between said supporting flanges and each having a rear marginal edge and a front edge forming a drip adapted to close against the rear marginal edge of an ad- Jacent louver, wings extending laterally from inner faces of said louvers substantially across the width of the louvers at the respective ends thereof and in close relation with the facing sides of said supporting flanges, an actuating bar extending across the flange side of. the louvers at one side of the frame and in substantially the plane of the supporting flange at that side of the frame, trunnions connected with the wings at points spaced from said inner faces of the louvers in substantial registry with said rear marginal edges and having connection with said supporting flanges at points spaced inwardly from the front of said supporting flanges a distance less than the spacing of the trunnions from said inner faces of the louvers whereby said louvers are offset outwardly from said frame to accommodate said bar when the louvers are in closed position with the front edge of one louver overlapping the rear marginal edge of an adjacent louver, pivot members connecting said wings with the bar, and means for reciprocating the bar to pivot all of said louvers,
40 said lateral wings being of suflicient depth to close the space between the louvers and flanges when the louvers are in closed position.
4. An exterior Venetian blind including side stiles adapted for attachment to opposite sides of an opening in a supporting frame, said side stiles having flanges arranged at substantially right angles to the plane of said frame, a plurality of louvers bridging the opening between said flanges and each having a rear marginal edge and a front edge forming a drip adapted to close against the rear marginal edge of an adjacent louver, wings extending laterally from inner faces of said louvers substantially across the width of the louvers at the respective ends thereof and in close relation with the facing sides of said flanges, an actuating bar extending across the flange side of the louvers at one side of the frame and in substantially the plane of the flange at that side of the frame, trunnions connected with the wings at points spaced from said inner faces of the louvers in substantial registry with said rear marginal edges and having connection with the flanges at points spaced inwardly from the front of said flanges a distance less than the spacing of the trunnions from said inner faces of the louvers whereby said louvers are offset outwardly from said frame to accommodate said bar when the louvers are in closed position with the front edge of one louver overlapping the rear marginal edge of an adjacent louver, pivot members connecting said wings with the bar whereby all of said louvers are simultaneously pivoted on said trunnions responsive to reciprocation of the bar, means for reciprocating the bar, and an operating lever having fulcrum support on one of said trunnions and pivotal connection with a corresponding pivot member for effecting reciprocation of said bar.
LEMUAL G. BROWN.