US2217472A - Movable louver - Google Patents

Description

Oct. 8, 1940.

L. COSCWSKY MOVABLE LOUVER Filed Feb. 26, 1940' INVENTOR awk Comms/K Patented Oct. 8, 1940 UNITED STATES PATENT oEFicE 4 Claims.

This invention relates to new and useful improvements in a movable louver,

The invention particularly proposes to characterize the louver by a tubular body adapted to be engaged through a wall, and having outwardly extending flanges on its front and rear ends, and shutter plates mounted across the sides of said frame and operated in a particular manner.

More specifically, the invention contemplates mounting the 'shutter plates on a plurality of spaced parallel rods which are turnably mounted between opposite walls of the tubular frame, and it is proposed to provide the rods with crank portions on one of their ends disposed in a space between the tubular frame and an end wall mounted across the flanges of the tubular frame, and further proposed to provide certain mechanism for moving said crank portions in unison for opening and closing the shutter plates.

The invention contemplates the use of a bar connecting the cranks together to move in unison, and a novel arrangement for moving the bar to open and close the shutter plates. y

Another object of the invention resides in characterizing the means mentioned in the previous paragraph by a pivotally mounted handle of limited amplitude associated with a link which is pivotally connected with the handle and pivotally connected with the bar and serves to transmit an oscillating motion to the bar when the handle is moved.

Still further it is proposed to provide a means for shifting the link along the handle to various positions to control the extent to which the shutter plates are opened.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description 4and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure- Fig. 1 is a perspective view of a movable louver constructed according to this invention.

Fig. 2 is a transverse vertical sectional view taken on the line 2 2 of Fig; 1.

Fig. 3 is a transverse vertical sectional View taken on the line 3-3 of Fig. 1.

Fig. 4 is a reduced elevational View looking in the direction of the line 4-4 of Fig. 3.

Fig. 5 is an enlarged horizontal sectional view taken on the line 5 5 of Fig. 4.

Fig. 6 isa fragmentary edge elevationalview similar to Fig. 3 but illustrating a modified form of the invention.

Fig. 7 is a fragmentary horizontal sectional view taken on the line l-'l of Fig. 6.

Fig. 8 is a perspective view of the handle used in Figs. 6 and '7, illustrated per se.

The movable louver, according to this invention, includes a tubular frame Ill for engagement through a wall and having outwardly extending flanges I0@ and Illb at its front and rear ends, respectively. The tubular frame Il) has a shoulder portion Iiic near its rear end. The top wall Il!d of the frame tapers downwards from the front to the rear. The side walls IIle and the bottom wall IIlf are straight from the front to the rear. A screen I I is mounted across the outside iiange Ib. This-screen has edge portions I Ic bent over the edges of the flange Illb.

End walls I2 are mounted across the edges of vthe end walls I2. Shutter plates I5 are mounted upon the rods I4 and extend in length across the sides of the tubular frame i0. These shutter plates have curved top portions I5a adapted to mate with the bottom edges of adjacent shutter plates in a manner to close the louver when the shutter plates are substantially in the vertical plane. The uppermost shutter plate I5 is adapted to engage against the shoulder IGC. The ends of each of the shutter plates I5 also engage against the shoulder Ill, but more specifically, only against the shoulder portions Illc at the sides of the frame Ill. The dot and d'ash lines in Fig. 2, indicate the open positions of the shutter plates I5.

A bar Il connects the crank i4@ together to move-in unison with each other. This is accomplished merely by forming openings 'I8 in the bar I'I through which the ends of the cranks Illa engage. The bar I'I is vertically slidably guided by several straps I9 mounted upon the side Wall of the tubular frame Ill.

A pivotally mounted handle 25 of limited amplitude projects through an opening in the front flange I Ba. This handle has a double hook shaped front end 25a adapted to be engaged by a conventional window opening pole in a manner so that the louver may be opened or closed as hereinafter more fully described.

The handle 2li is pivotally supported by a pintle 2| mounted on the side wall of the tubular frame Ill. The handle 26 is limited in amplitude by pins 22 and 23 which are mounted upon and project from the side wall of the tubular frame I0 and are located above and below the inner end of the handle 20. A link 24 is pivotally connected at one end with the handle 2!! and extends downwards at a slight angle and is pivotally connected with the bar |l'. This pivotal connection is accomplished by having the link Z4 engage the uppermost crank Elia. The dot and dash lines 2|), and ida in Fig. 3 represent the shifted positions of the corresponding full line parts which they assume when the louver is opened.

The operation of the device is as follows:

As illustrated by the full lines on the drawing, the louver is in its closed position. In order to open the louver it is required that a window pole or other implement be engaged against the bottom of the extended end of the handle 20, and then the handle is forced upwards. This indirectly forces the bar downwards which indirectly turns the rods Ill. The shutters I5 which are attached to the rods correspondingly turn and now the louver is opened. It may be closed by engaging a hook on the extended end of the handle 20 and pulling down to pull the handle 2i] back to its original position.

In Figs. 6 8 inclusive a modied form of the invention has been disclosed which is very similar v to the prior form, distinguishing merely in the fact that a means has been provided for shifting the link 24 along the handle 20 for varying the amplitude through which the shutter plates I5 are moved by operation of the handle Z0. Specifically, this means includes a rod 26 which is rotatively mounted upon the handle 2B'. This rod has a head 21 on its inner end rotatively engaging a socket 28 formed on the handle 20. The handle 2U is provided with several stamped out strip portions 29 near its outer end which form bearings for the rod 25. A head 3U is mounted on the extended end of the rod by which the rod may be readily turned. A follower 3| is threadedly engaged on a section of the rod 26. The link 24 is pivotally connected with the follower Sl by a pintle 32. In other respects this form of the invention is similar to the previous form.

The operation of this form or" the device is as follows:

The handle 2B may be rotated to move the follower 3i along the threaded portion of the rod 26. Since the top one of the shutter plates I5 is engaging the shoulder Hlc and cannot move, the handle 20' will pivot a distance depending on the amount that the screw 26 is turned. Moreover, the follower 3| will assume a position spaced a greater distance from the pivot 2| of the handle 20. The louver may be opened similar to the functioning previously described. The handle 2S is forced upwards. This moves the inner end of the handle downwards and the motion is transmitted by the link 24 to move the bar I1 downwards. However, since the follower 3| is at a greater distance from the pivot 2| it will move through a larger arcuate distance, and so move the bar Il through a larger distance. This will control the extent to which the shutter plates I5 open when the handle 20 is moved to its fully opened position.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A movable louver, comprising a tubular frame, for engagement through a wall and having outwardly extending anges on its front and rear ends, a screen mounted across the outside one of said flanges, end walls mounted across the edges of said flanges, a plurality of spaced parallel rods turnably mounted between opposite walls of said tubular frame and having crank portions on one of their ends disposed in the space between said tubular frame and one of said end walls, shutter plates mounted on said rods and extending across said tubular frame, a bar connecting said cranks together to move in unison, a pivotally mounted limited amplitude handle projecting from said front flange and having an inner end, a link pivotally connected with said handle and pivotally connected with said bar, and means for shifting said link along said handle to Various position, including a rod rotatively mounted on the handle and having a threaded section, a follower mounted on said threaded section, and said link being pivotally mounted on said follower.

2. A movable louver, comprising a tubular frame, for engagement through a wall and having outwardly extending flanges on its front and rear ends, a screen mounted across the outside one of said flanges, end walls mounted across the edges of said ilanges, a plurality of spaced parallel rods turnably mounted between opposite walls of said tubular frame and having crank portions on one of their ends disposed in the space between said tubular frame and one of said end walls, shutter plates mounted on said rods and extending across said tubular frame, a bar connecting said cranks together to move in unison, a pivotally mounted limited amplitude handle projecting from said front ange and having an inner end, a link pivotally connected with said handle and pivotally connected with said bar, and means for shifting said link along said handle to various position, including a rod rotatively mounted on the handle and having a threaded section, a follower mounted on said threaded section, and said link being pivotally mounted on said follower, and said rod being extended to the outer end of the handle and provided with a head by which it may be readily turned.

3. In a device of the class described, a frame, a plurality of spaced rods turnably mounted between opposite Walls of said frame, crank portions formed on the ends of said rods, shutter plates mounted on said rods and extending across said frame, a bar connecting said cranks to move in unison, a pivotally mounted handle, a link having one end pivotally connected to said bar, a follower pivotally mounted on the free end of said link and slidably engaging a longitudinal slot in said handle, and means for holding said follower in various shifted positions along the length o1" said slot for changing the point of pivotal connection of said link with said handle to control the distance through Which said shutter plates will move when said handle is pivoted.

4. In a device of the class described, a frame,

a plurality of spaced rods turnably mounted between opposite Walls of said frame, crank portions formed on the ends of said rods, shutter plates mounted on said rods and extending across said frame, a bar connecting said cranks to move in unison, a pivotally mounted handle, a link having one end pivotally connected to said bar, a. follower pivotally mounted on the free end o-f said link and slidably engaging a longitudinal slot in 1U said handle, and means for holding said follower in various shifted positions along the length of said slot for changing the point of pivotal connection of said link .with said handle to control the distance through Which said shutter plates will move When said handle is pivoted, comprising a rod rotatively mounted on said handle and having a threaded section engaging through said follower for shifting said follower along the length of said slot as said rod is turned. l

LOUIS COSOWSKY.

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