US987654A - Window-screen. - Google Patents

Description

W. THOMPSON. WINDOW. SCREEN.

APPLICATION FILED FEB. 21, 1910.

Patented Mar. 21, 1911.

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llhll'llED ,dilATEd WILLIAM THOMPSON, 0F LQS ANGELES, CALIFORNIA.

WINDOVJ-SCREEN.

Specification of Letters Eatent.

Patented Mar; 211, Matt.

Application filed February 21, i510. Serial No. 545,212.

To all whom it may concern:

Be it known that 1, WILLIAM THOMPSON, a. citizen of the United States, residing at Los Angeles, in the county of Los Angeles 5 March 19,1895, the present invention being an improvement on the construction therein disclosed.

he main object of the present invention is to provide means for detachably securing the flexible screen to the sash so that the screenand sash may be worked together or may be operated separately as desired.

Another object of the invention is to provide improved means for operation of the screen and particularly for maintaining the screen in a suit-able condition of tension.

A further object of the invention is to provide a screen of this character with means for guiding the same accurately in its vertical motion and for maintaining the closure at each sideot' the screen so as to prevententry of flies, etc., at such parts.

The accompanying drawings illustrate the invention, and referring thereto Figure 1 is a front elevation of the window withparts broken away to show the interior construction. Fig. 2- is a vertical sec-.'

tion on line av -m Fig. 1. Fig. 3 is a vertical section on line av -n2 Fig. 1. Fig, fl is a horizontal section on line wi -w", Fig. 1.

' Fig. 5 is a detail vertical section on the line m -w Fig. 1.

The window frame comprises vertical side members 1, and'top and bottom members 2, 3, each of said side members being hollow. Rollers at are rotatably mounted in the top and bottom members 2, 3 and flexible screens consisting for example, of wire cloth, indicated at 5, are secured to and wound on said rollers and fastened at their ends to the respective sashes. Said sashes are shown as reversible, being provided with guide strips 8 to which the sashes 6, 7 are pivoted at 8',

and said guide strips being connected by cross bars 15 and adapted to slide vertically in the window casing, being guided on the .usual guiding 'means on said member 1, and

provided with counterweight means. Said counterweight means are also utilized'for the retraction or tensioning of the window screens and for this purpose the rollers 4 are provided respectively with drums 9, 10 connected to the counterweight means. In the case of the upper roller the drum 9 thereof is connected to a cord 11 wound around said drum and passing downwardly under a pulley 12 on a counterweight Y13, and then upwardly over a pulley 14 on the side member 1 of the casing; the farther end of said cord being attached to the side bar 8 for the upper sash so that the weight 13 tends both to hold the upper sash closed and to wind up the upper screen.

The side bar 8 for the lower sash 7 18 connected to cord 16 passing over pulley l7 and provided with a loop or pulley 18 at its end, and the drum 10 of. the lower screen 5 is connect-ed to a cord 20 passing over the loop 18 and is connected to a. counterweight 21.

.The connection of the lower screen to the lower sash iiiay-- be made detachable, an intermediate bar 28 being provided connected to the lower screen 5 and spring catches 29 being attached to the inner face of the bottom bar of the lower sash and provided with hooks 33 engaging slots 30 in a metal plate 81 attached to the bar 28 and normally holding the screen and sash in connect-ion. When it is desired to release the screen from the sash, the spring catches 9.9 are drawn forward by means of buttons thereon to release their hooks from the slots 30 so that the lower sash may be raised without throwing up the lower screen. It will be understood, however, that any suitable detachable connection may be provided between the screen and sash.

In the above described applicationof the invention to reversible sashes the cross bars 15 of the guiding means 8 serve also as means for connection ofthe screens, as above 3 described. The connection of the cord 20 by means of the pulley 17 not only serves to sustain the lower sash and tension the lower screen, but also takes up any stretch in the which the sashes 6, 7, slide, the side members 1 of the window frame being provided with vertical grooves or'channels 35 in which the edges of the screens 5 are guided and closely and passing over said pulley, other end ofsaid cord, a drum connected to confined, thereby prei cnting buckling of the screens and also forming an effectual closure or bar to the entrance of any flies.

Upper and lower guide rollers 36 and 37, respectively, are provided for cords l1 and 20, which serve as guides for the weights and prevent them from coming into contact with each other.

What I claim is In combinationwith a Window frame, a

sash sliding therein, aflexible screen detachably connected to said sash, a roller on which said flexible screen is wound, a pulley irnthe window frame, a cord connected to the-sash a pulley at the H said roller, a second cord connected at one end to said drum and passing over said pulley at the end of the first-cord, and a counterweight at the other end of said second cord, whereby both of said cords are put under conditions of tension tending to draw the sash andscreen in opposite directions and maintaining the screen in condition of tension.

In testimony whereof, I have hereunto set I my hand at Los Angeles, California, this 14th day of February 1910.

WVILLIAM THOMPSON.

In presence of ARTHUR P. KNIGHT,

FRANK L. A. GRAHAM.

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