US286555A - Ventilating-screen for windows - Google Patents

Description

(No Model.)

B. W; PHILBROOK.

VENTILATING SCREEN FOR WINDOWS. No. 286,555. 5 Patented Oct. 9, 1883.

PATENT FFICE.

EB'IMELINE V. PHILBR-OOK, OF BOSTON, MASSACHUSETTS.

VENTlLATlNG-SCREEN- FOR WINDOWS.

SPECIFICATION" forming part of Letters Patent No. 286,55Q, dated October 9, 188?.

-Application filed March 26,1853. (No model.)

To all whom it mayconcern:

Be it known that I, 'EMMELINE XV. PHIL- BnooK, of Boston, in the county of Suffolk and sufficient distance to admit it, and he] d in place by closing the sash against it.

Window l ventilators have commonly been made with a frame covered with a netting of wire or other material, and provided with acover or shield hinged at the bottom and adapt ed to he opened a greater or less distance, according as more or less air is required. In the present invention a shield or cover hinged to the frame is also employed, and in connection with it are provided devices which act automatically to hold the shield or cover at any desired angle. These devices consist of curved arms provided with a series of notches or indentations, which engage pins or projections on the ends of the shield. The arms are pressed against said pins with sufficient force to hold the shield in any position. in-which it may be placed. 011 the opposite side of the frame from the hinged cover or shield is an extension piece or slide moving in grooves in the back of said frame. The object of this slide is to afford greater nicety of adjustment to the air-opening, and also to enable the ventilator to fit windows of different widths. Along the lower edge of the frame is placed a metal strip let into the wood, and whichforms a ledge or trough for catching any particles of dust that may sift through the screen.

The invention consists in" the ventilator as a whole, in the several new improvements herein described, and in the particular con structions, combinations, and arrangements of parts, as hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a perspective view of. a window-ventilator constructed in accordance with the invention; Fig. 2, a vertical section of the same, partly in elevation; Fig. 3, a front elevation of a portion of a screen, showing a two-part extension-piece;

Fig. 4, a rear elevation of the same, and Fig. 5 a detail view.

A is the frame, preferably of wood, inclosing a screen, a, of fine wire-netting or other perforate medium, the frame being made sufiiciently strong to support the weightof the window-sash. I

To the bottom strip of the frame is hinged a shield or cover, B, which may be shut entirely to exclude all air or opened more or less to admit a greater or less draft. This cover or shield may be made of various materials. I prefer, for the sake of lightness and economy, to construct it of stiff paper or straw board, with the edges bound with metal, as shown.

At the ends of frame A are pivoted curved arms 0, having their inner edges provided with a series of notches or indentations thatengage pins b, projecting from the ends of cover 13. By the tension of the small springs c, the notched arms are caused to bear upon the pins 1) with sufficient pressure to hold the cover or shield in whatever position it may be placed. The sides of the notches in arm s'C are inclined, so that they are lifted up to allow the pins to pass whena moderate degree of force is brought to bear on the cover through cords D E. At the lower ends of the arms C are projections c, which act as stops to limit the movement of the cover and prevent the pins 22 escaping from said arms. of which the cover may be opened or closed, are provided, one, D, for pulling down the shield or cover, attached near the upperedge thereof, the other, for pulling up or closing the cover, passing through the eyes e c in the frame. XVhere the screen or ventilator is to be used under the lower sash, these cords are not needed, and may be dispensed with.

At the back of frame A is an extension.- piece, F, also made of paper, pasteboard, straw-board, or similar material. This piece has attached to its face parallel strips f, of brass or other metal or material, which work in grooves or slits in the frame and permit the piece F to slide easily thereon. As the strips and their respective grooves are inclined in opposite directions, they serve also to keep the piece F from becoming detached. Spring friction devices f (see Fig. 4,) secured to the back of the frame, act by their contact with Two sets of cords, by means the metal bands around the piece F to hold it from accidental slipping when entirely closed, and to check its complete Withdrawal. To

- remove the slide it is only necessary to apply frame.

sufficient force to cause the edge of the piece to depress the friction devices and ride over them.

In order to reduce the size of the device to the smallest compass, which for some purposes as, for instance, to carry it about the person for use in traveling in a railway-car-is desirable, the frame and screen are made smaller than usual, and the extension-piece F made 'in' two parts hinged together, as shown in Fig. 3. The part F can be folded back when desired .to pack up the device for transportation, and

it is also provided with runners or strips f, which take into the grooves in the back of the This construction both reduces the size of the device and furnishes additional means for'adjustment.

The shield or cover B not only regulates the supply of air, but also serves to deflect the same upward, preventing injurious draft; In this it is aided by the side pieces, B, of cloth, the edges of, which are fastened to the frame and cover, respectively. Should any dust or other fine particles of matter sift through the screen a, they would strike against the shield B, and,

falling down between it and the frame, be caught by the ledge G, which is or may be a stripofbrassor other metal let into the frame A;

In use the ventilator would be placed in the window-frame, between the sash, which would be partly opened for that purpose, and either the upper or lower sill of the window-frame, the sliding extension-piece would be adjusted to uncover as much as deemed necessary of the perforate screen and to close up the space fsired angle, in which position it will be re that the frame'does not occupy, and the shield or cover set by means of the cords atthe detained by the notched arms, as explained. Small points a in the frame penetrate slightly into the wood-work of the window and aid in holding the device securely in place.

The shield B and sliding piece F being made of very light material, and the whole device being readily reducible to small compass and to shape convenient forhandling, the improved v ventilator may be easily carried from place to place, as its use may be needed, or maybe carried in thepocket 'or satchel for use while traveling.

Having now fully described my said invention and the manner of carrying the same into effect, what I claim is 1. In a window-ventilator, the combination of the frame, the shield hinged thereto, the spring-arms pivoted to said frame and pro vided with serrations or notches having inclined sides, and the pins fixed in said shield and engaging said spring-arms, substantially as described.

2. The combination of the frame inclosing a screen of wire or other material, the hinged shield or cover, and the notched arms bearing with yielding pressure on pins projecting from said shield or cover, substantially as and for the purpose described.

3. The combination, with the screen and hinged shield or cover, of the notched spring-' 6. The combination. with the screen, of a two-part sliding extension-piece, substantially as described.

7. The combination, with the frame and open-workscreen, of a sliding extension-piece provided with metal strips inclined in oppo site directions working in slits or grooves in said frame, substantially as described.

In testimony whereof I have signed this specification in the. presence of two subscrib ing witnesses.

EMMELIN E \V.

Witnesses:

WV. H. DAVIS, ANNIEG. FLAGG.

PHILBROOK.

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