US2303301A

US2303301A - Window screen

Info

Publication number: US2303301A
Application number: US430061A
Authority: US
Inventors: Leland T Milnor
Original assignee: CINCINNATI FLY SCREEN Co
Current assignee: CINCINNATI FLY SCREEN Co
Priority date: 1942-02-09
Filing date: 1942-02-09
Publication date: 1942-11-24
Anticipated expiration: 1959-11-24

Description

WINDOW SCREEN -Fi1ed`Feb. 9, 1942 Nov. 24, 1942.

y ATTRNEY.

Patented Nov. 24, 1942 WINDOW SCREEN Leland T. Milnor, Indian Hill, Ohio, assignor to The Cincinnati Fly Screen Company, Clncin-A nati, Ohio, a corporation of Ohio Application February 9, 1942, Serial No. 430,061 A 4 Claims. (Cl. 16o-328) 'Ihis invention relates to improvements in window screens of the type commercially referred to as frameless, having the screen fabric clipped within or bound at relative opposite ends respectively by a binding rail for direct attachment to the window frame, and upon tautly spanning the screen fabric, its longitudinal margins are brought into intimate contact with relative rails or strips designatedl as blind stops protruding metal rails of duplicate structure for binding the relative or opposite top and bottom ends of thel screen fabric for. direct application to a window frame or opening framing, the rails cut from stock length or trimmed at one end to a length 55 size for a given or specific length of opening, and for edge or end binding various different styles or types of screen fabric, and to which conventional types of fasteners can be readily applied for quick attachment and detachment of the screen to the opening frame, and for drawing the screen fabric tautlyin place.

Another object is to provide an improved screen of the frameless type of simple construction and from and a part of the window vframe. o low manufacturing cost, and adapting the parts The screen with its bind strips or rails as a to be easily and readily fitted and assembled to unit is readily attached and detached from the meet specific measurements atthe place of inwindow frame, and can be compactly folded or stallation as well as its applicationA to the openrolled4 up for shipping and storage. The screen ing framingfabric generally is of a length and width of a sizel l5 Various other features and advantages of the to shield the full area of window opening, and invention will be more fully set forth in a dethe binding rail at one end of the fabric is scription of the accompanying drawing, in which: equipped for detachable mounting to the top of Figure 1 is an elevation of a window frame tthe window frame, and the second rail at the ted with a frameless window screen constructed opposite or lower end for detachably connecting 0 in accordance withand illustrating an embodiwith the window sill and for drawing the fabric ment of the invention, the view being from the taut. inner or operating side.

The present improvement is directed to sim- Figure 2 iS an` enlarged section on line 2-2, plify and increase the durability of the binding Figure 1. rails and their mode of attachment to the win- 35 Figure 3 iS a Section 0n line 3-3, Figure 2- doW frame to effect a reduction in cost over the Figure 4 is a perspective view of a section of prevailing types of binding rails employed for the beading or clamping strip for securing the frameless screens, and to utilize a conventional screen fabricto abinding rail. sheet metal strip material commonly referred to Figure 5 is an enlarged plan View ef a portion as molding employed in the manufacture of metal 'i0 of the screen, illustrating the improved beading frames for screens. The same strip materialis or clamping strip for securing a shade screen fabemployed for the binding rails at the opposite or ric t0 the binding rails. I top and bottom ends of the screen fabric, and Figure 6 is a view similar to Figure 5, with the provides for clinching the marginal end of the beading or clamping strip in a reverse position fabric within a channel Yin the rail by a channel 35 for securing the Conventional Square mesh wire form of beading or clamping strip compressed screen fabric to a pair of binding rails. into the channel of the binding rail. In a frameless screen, a specific length and The beading or clamping strip is of improved width of metal screen fabric appropriate for the form to adapt its use for clamping several differsize of window opening is provided at its top and' ent types of screen fabric, as for example, the 40 bottom ends with transverse rigid rails to which conventional round wire square mesh screen fabthe edge of the fabric is bound. The upper rail ric, and a second type designated as a shade is detachably fastened to the upper cross rail of screen fabric consisting of closely spaced, subthe Window frame, preferably by means of devices stantially parallel, thin gauge, flat metal strips as operable from the inside, and the lower rail, herehorizontals tied together in their spaced relation l5 tofore generally consisting of a duplex or lat;- by strands of twisted wire as verticals,` disposed erally extensible form of rail, is detachably fasa major spacing apart.y tened to the window sill. The longitudinal free It is, therefore, an object of the invention to edges or margins of the fabric overlappingly conprovide a frameless type yof screen for window tact with the usual strip or blind stop projecting and other openings with rigid transverse sheet 50 fromjthe window frame.

Under the prevailing practice, the lower rail is composed of a plurality of strips relatively slidably joined for vertical or lateral extensibility of the rail, one strip connecting with the screen fabric, and the second locked to the sill. Means operable from the inside are mounted on the bottom rail for forcibly moving the strips of the rail relatively to draw the screen fabric under tension and bring its longitudinal free margins in intimate contact with the Window frame.

Considerable mechanical work is required for a proper fitting installation of the frameless screen to a window frame, and embodying a costly rail, construction, and therefore, did not lend itself competitively with the frame type of screen, a1- though the frameless type offers considerable' advantage over the frame type in that it can be compactly rolled up and taken down for storage. The present improvement offers a reduction in manufacturing cost, greater convenience in making a window opening fitting as well as increasing its utility in its adaptability for use in connection with various styles and types of screen fabric.

Referring to the drawing, I indicates a conventional window frame composed of a pair of

jambs

2, 2, top rail 3 connecting the upper ends of the jambs, and a sill 4 connecting the bottom ends of the jambs, each jamb and the cross rail having the usual blind stop or strip 5 projecting inwardly of the frame. The frameless screen comprises a top rail 6, a bottom rail 1, and a screen fabric 8 having its opposite ends respectively fixed to said top and bottom rails. The top and bottom rails 6 and 'l in the present instance are of dupli for example, of a cross-sectional formation, as

shown and described inL Letters Patent of the United States No. 1,743,935 to A. C. Schneider et al., January 14, 1930.

As illustrated, the strip is formed of a single sheet of metal shaped to comprise a rectangular hollow or tubular body portion 9 with the opposite longitudinal edge of the sheet metal brought together in a laminated extension at one end of the body portion and in plane with one side thereof to provide a base wall I of a channel Il longitudinally at one end of the strip and formed by bending the free ends of the metal at a right angle to the base wall 9 to provide a laminated side wall l2 for the channel. The free end of the outer ner layer, and its edge marginally crimped inwardly upon itself for reinforcement and rounding the free edge of the channel wall.

The Heading strip I3, for frictionally clamping the screen fabric into the channel, constitutes a -strip of sheet metal bent into channel or U- form in cross-section with its free ends longitudinally of the strip marginally bent upon itself inwardly to reinforce and round the edge. One limb or flange of the beading strip is laterally notched or serrated. The notches |3a are disposed at definite uniform spacing apart and terminate slightly inward into the base wall or web and in a curved or rounded form. The notches provide a clearance for the vertical twisted wire strands Il of a shade style metal screen fabric. The twisted wire strands loop about thin gauge flat wire horizontals I minutely spaced apart and have their flat sides parallel and set at a slight angle to the plane of the shade. This type 7 of screen fabric for a frameless screen is advantageous over the square mesh woven type of screen fabric in that the horizontals can be cut between a pair of verticals to reduce the width of 5 sitated with the woven square mesh type of screen fabric, which requires a selvage edge to prevent unravel.

Owing to the large degree of spacing of the verticals, a comparatively limited number of verlo ticals are employed, and it is desirable to avoid impingement thereof which causes their breakage in binding the screen fabric within the rail. Impingement of the verticals is prevented in having the same extend in the notches of the beading 5 strip. As the result desired is accomplished by notching only one flange of the beading strip, the second or opposite flange is left intact so that the strip can be reversed when utilized for binding the conventional square mesh wire screen o fabric to a rail, as shown in Figure 6.

The top rail 6 at the inner side of the screen is provided with a plurality of fasteners or latches IS, each preferably in the form of a sheet metal stamping, consisting of a disc I1 rotativeLv aperture in the rail and held in place by a thumb nut I 9 screw-threaded upon the bolt. The disc has a curved flange segment extending laterally from one side thereof, and the flange is slotted for effecting a locking engagement with a screw 2| fixed into the window frame. A handle 22 integral with the disc extends radially therefrom. A'slight arc of rotation of the disc moves the locking flange either into or out of engagement with the s crew for attaching or detaching the rail to the window frame. The configuration of the notch in the locking flange and the curvature of the flange serves to draw the rail inwardly against the window frame, and also o slightly outwardly. The rail is preferably provided with a series of lined apertures for adjustably positioning the latch fastener on the rail.

The lower rail 1 is equipped with a plurality of latches 23, the number being optional and depending upon the rail length; usually a pair will suffice. The latch is of conventional construction, comprising a base plate 24 fixed to the rail by a pair of screws and rotatively sustaining a disc 25 integrally having a handle extension and layer of the wall I2 is extended beyond the in- 50 a cam or key element. 28 at its rear side thereof traversing an aperture 21 in av hasn plate 2l. Upon rotation of the key relative movement is imposed to the hasp plate. The hasp plate at its lower end has a laterally extended latch bar 2l 55 adapted for interlocking connection with a latch plate 30 fixed to the window sill.

Upon interengaging the latch bar 2l with the latch plate, and rotating the key or cam by its actuating handle in an appropriated direction or a0 arc of revolution, the rail 1 is depressed, locking the rail to the'sill and drawing the screen fabric undertension to an ample degree of tautness and bringing its longitudinal Afree margins into intimate contact with the blind stops of the window frame.

Moving the latch handle in a reverse direction will move the latch plate downwardly or outwardly, releasing the tension on the screen fabric and permitting the lock bar to be unhooked or disengaged from the latch plate and release of the lower rail, so that the screen fabric with its lower rail can be swung outwardly without release of the top rail for access to the window the fabric to meet a definite width of window u panes for cleansing.

bolted to the rail 6 by a bolt I 8 traversing an ing the opening, rails for respectively rigidly v binding relative opposite ends of the screen fabric, the rails formed of sheet metal and of duplicate cross section, each having a channel longitudinally in one side thereof for the reception of an end margin of the screen fabricand fastener ldevices respectively fixed to said binding rails for removably attaching the rails to the opening framing respectively at the top and bottom thereof and *for drawing the screen fabric under tension; a beading strip of U-form in cross section intertting said channel for binding the margin of the screen fabric within the channel, one longitudinal ange of said strip laterally serrated providing a plurality of adjacent tongue sections, each adapted to be engaged between a pair of vertical strands of said screen fabric, the serrations providing a strand clearance.

2. A railforbinding an end of a screen fabric for a frameless type of -screen, the rail having a longitudinal channel in one side thereof for the reception of an edge of the screen fabric, and a strip U-form in cross section for interengagement in said channel, one limb thereof having a series of lateral notches subdividing the limb into a plurality of tongues, each for engagement through the mesh of the screen fabric between adJacent pairs of longitudinal strands of the fabric, each not'ch providing a clearance for a'vertical strand of the screen fabric in binding the fabric to the rail.

3.'A rail fOr binding an end of a screen fabric, the rail having a longitudinal channel in one side thereof for the reception of an edge margin of the screen fabric, and a channel strip intermeshing in said channel for binding the fabric in the channel having one limb thereof .laterally serrated, each 'serration providing a clearance for a vertical strand of the screen fabric in binding the fabric to the rail.

4'. A binding strip for intermesh within a channel in a rail for securing an edge of a screen fabric to the rail, the strip being of channel form in cross section having one limb thereof laterally serrated, each serration providing a clearance for a vertical strand of the screen fabric in binding the fabric to the rail.

' LELAND T. MILNOR.