US2554542A - Locator and wear shoe for frameless window screens - Google Patents

Description

y 29, 1951 D. J. RUST ET AL 2,554,542

LOCATOR AND WEAR SHOE FOR FRAMELESS WINDOW SCREENS Filed April 5, 1950 55 .Da via JIRus t Jack J6.Jensen ATTOR N EYS Patented May 29, 1951 .1; 51.1:-

LOCATOR AND WEAR SHOE FOR FRAMELESS WINDOW SCREENS David Jordan Rust and Jack H. Jensen, San

Leandro, Califi, assignor to Ry-Lock Company, Ltd., San Leandro, Calif., a corporation of Calif l i fornia Application April 3, 1950, Serial No. 153,621

3-Claims. (01. 160-328) the bottom cross bar of the screen, at each end,

with a novel device for properly locating the bar relative to the corresponding tension lever, and to prevent the latter from escaping the closely adjacent end of said bar.

Another important object of the invention is to incorporate, in the device, an effective Wear shoe which the hook of the corresponding tension lever engages when the screen is under tension; such wear shoe serving to protect the upper edge of the bottom cross bar-which is of relatively thin gauge sheet metal-against damage when the tension lever is under heavy load.

A further object of the invention is to provide a locator and wear shoe, for the purpose described, which is of integral construction and permanently attached to the bottom cross bar; the device being simple but sturdy in structure, and designed for ease and economy of manufacture as a stamping from sheet metal.

Still another object of the invention is to provide a practical and reliable tension lever locator and wear shoe for mounting on the bottom cross bar of a frameless window screen, and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. l is an outer end elevation, partly in section, showing the device as in use with the screen held taut by the tension lever.

Fig. 2 is an outer end elevation of the device with the tension lever released and the screen slack.

Fig. 3 is a front elevation of the device in use.

Referring now more particularly to the characters of reference on the drawings, the numeral l indicates a frameless window screen of t e type which includes a top cross bar 2 and a bottom cross bar 3; the top cross bar 2 being secured by suitable attachment devices 4 to the header5 of a window frame which includes a sill 6; the bottom cross bar 3 engaging said sill.

At each side of the screen I and adjacent the bottom thereof, there is'a screen tensioning device, indicated generally at 1, affixed to the corresponding jamb 8.

Each such screen tensioning device l comprises a bracket 9 having a lateral flange 10 attached by screws l l to the jamb 8-.' I

A tension lever I2 is pivoted, as at I3; to the bracket 9 for vertical swinging motion from an out-swung releasedposition', as in Fig. 2,'toa down-swung, beyond-dead-center tension pomtion, as in Fig. 1. Operation of the tension lever I2 by hand isfacilitatedbythe inclusion of a laterally extending finger tab l4 thereon.

'The bottom cross bar 3 projects at each end beyond the adjacent vertical edge of the screen i, and the corresponding tension lever [2 includes a downwardly opening hook l5 which engages, forcefully, with the upper edge of said projecting end portion of the bottom cross bar 3 when the tension lever I2 is in its beyond-deadcenter working position, as in Fig. 1.

As the tension lever 12 forcefully engages with the upper edge of the bottom cross bar 3 extremely close to the adjacent end of said bar, the present invention contemplates the following device to not only properly locate said bottom cross bar 3 relative to the tension lever l2, but also to prevent said lever from escaping the bar at said end.

The invention therefore provides a flat, upstanding locator flange I6 at each end of the bottom cross bar 3'; said locator flang being disposed edgewise to the bar and projecting forwardly therefrom from a point slightly above the upper edge of the bar to adjacent the latters lower edge.

The upstanding locator flange l6 includes, at its lower portion, a laterally inwardly projecting attachment plate I! which is aflixed to the face of the'bottom cross bar 3 by rivets I8.

As so attached the locator flange It lies closely adjacent, but to the outside of, the tension lever I2 when the latter is in its downward-swung, beyond-dead-center position, as in Fig. 1; thus effectively locating the relative positions of the bar and level l2, and maintaining the latter against escape off the adjacent end of the bar.

When the tension lever I2 is in said downswung, beyond-dead-center position, with the hook l forcefully engaging the upper edge IQ of the bottom cross bar 3 for the purpose of tensioning thescreen, there is a tendency to deform such edgeas the bottom cross bar is of relatively thin sheetwmetal-runless a protective element isprov'ided.

To this end the locator flange I6 is formed, at

its upper portion, with a laterally inwardly ex tending wear shoe 20 which includes a top por tion 2| which seats on, and rounds over theiup-c per edge I9 of the bottom cross bar*3"inthe zon of engagement of the hook k5.

Consequently when the tension .lever -l-2' is down-swung to its beyond-deadecenter:position, the hook l5 forcefully engages on said top portion2l of the wear shoe 20; effectively protectin the adjacent upper edge IQ of the bottom cross bar 3.

Additionally, the wear shoe 20, being formed as an integralpartbf the locator flange vHi, stiffens the latter against ,undesirable lateral bending or play.

With ,the described device vafiixed to each end ofthe bottom cross -bar,3 -of aframeless window screen I, the :tension levers l2 of the tensioning devices 1 on the jam'bs 8 are effectively maintained' :in -proper relative positions on the .bottom crossbar; cannotescape from the ends of the same; and further the corresponding upper edges of said bottom .cross bar are adequately protected by the wear ,shoes .2'0 against damage which might otherwise occur under-the relatively great pressure which the tension levers exert when ,in :operation.

From the foregoing description .it will be readil-y,s,eenthat there has been produced .such va devicefas substantiallyfulfills the objects of the invention, as set :forth :herein. 1 I While -.this specification sets forth .in 'detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

We claim:

- .1. Incthe combinationof a frameless window screen having a bottom cross bar, and a screen tensioning lever mounted on the window jarnb above and adjacent one end of the cross bar in overhanging relation thereto and having a down- .rwardly facingihook-notch to engage over the upper edge of "the cross bar; a locating device for they-lever'comprising a flange separate from the ijoarsprojedting therefrom at right angles thereto :atv'said-nne end thereof, and extending from the upper edge of the bar downwardly, and means securingsaid :fiange on the bar.

2. A device as in claim 1 in which the flange extends substantially to the lower edge of the bar and said means comprises a right angle flange integralcwith and projecting from the lower-portion of the :first named flange and abutting againstand secured to the lower portion of the cross bar.

*3. A device asin claim 1, with another flange, forming a'wear shoe-for the lever hook, integral with and projecting from the first named fiangein overlying and-engaging relation .to the adjacent portion of-therbottom bar at the top thereof.

DAVID JORDAN RUST. JACK H. JENSEN.

REFERENCES lCI-TED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,188,411 Burrowes j June 27,1916 12,146251 Dominick .Feb. 7, 1939

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