US2680035A - Spring sash balancer - Google Patents

Description

June l, 1954 C. C. AMY

SPRING SASH BALANCER Filed April 27, 1951 ATTD RN EYS Patented June 1, 1 954 TENT OFFICE SPRING SASH BALANCER Christopher C. Amy and Harry B. Harding, Reno, Nev.

Application April 27, 1951, Serial No. 223,406

1 Claim. l

This invention relates to a window construction, and more particularly to a sash balancer for a window.

The object of the invention is to provide a spring sash balancer which will effectively retain the window sashes immobile in their various adjusted positions.

Another object of the invention is to provide a spring sash balancer which can be mounted in a conventional window or a window having removable sashes, the balancer of the present invention enabling the window sashes to be raised with ease, and wherein accidental lowering of the sashes is prevented.

A further object of the invention is to provide a spring sash balancer which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a horizontal sectional view taken through a window, showing the sash balancer of the present invention installed therein;

Figure 2 is a fragmentary side elevational view of the window construction, with parts broken away and in section;

Figure 3 is an enlarged fragmentary end elevational view of the window sash, showing the balancer of the present invention therein;

Figure 4 is a sectional View taken on the line 4 4 of Figure 2;

Figure 5 is a sectional view taken on the line 5-5 of Figure 2.

Referring in detail to the drawings, there is shown a window construction wherein the frame includes the stops I0 that are vertically disposed and which may be fabricated of any suitable material. The window further includes the usual casing II and window sills I2. There is further provided a pair of spaced parallel, vertically disposed side jambs I4 and I5. The rst jamb I4 is provided on its inner face with a pair of recesses I6 and I1, Figure 1, and arranged contiguous to the inner face of the first jamb I4 is a metal jamb liner I8. The liner I3 in cludes an intermediate iiat portion I9 and a pair of curved portions 20 which seat in the recesses I6 and I'I.

Mounted for sliding movement or up-anddown movement in the window frame is a lower window sash 2I and an upper sash 22. Since each of these sashes 2| and 22 is of the same construction, only one will be described in detail. The upper sash 22 includes a pair of spaced parallel side rails 23 and 24, and extending between these siderails and secured thereto is a window pane or glass 25. The side rail 23 is provided with a longitudinally extending shoulder 26 on its outer surface which rides or slides in the curved portion 20 of the liner I8.

The other jamb I5 is provided with a plurality of spaced parallel, longitudinally extending grooves or cutouts 2'I which denne therebetween webs or fingers 28. The outer face of the side rail 24 is bifurcated or provided with a cutout or groove 29, and this cutout 29 defines a pair of fingers or tongues 30 which slide in the cutouts 2l, the web 28 projecting partially into the cutout 29.

Arranged in each of the cutouts 29 is the spring sash balancer which serves to maintain the window sashes immobile in their various adjusted positions, the spring sash balancer being indicated by the numeral 3l. The spring sash balancer 3| includes a rst plate 32 that may be made of any suitable material, such as spring metal, and the plate 32 includes a central flat portion 33 which is arranged contiguous to the adjacent surface of the side rail 24. The plate 32 is further provided with an outwardly bowed iiexible portion 34, and there is further provided a second outwardly bowed flexible portion 35. The bowed portion 35 is arranged above the flat lower end 36 of the plate 32. These features are shown clearly in Figure 2.

The spring sash balancer further includes a spring member 31 which includes a central portion 33 that is iiat, the central flat portion 38 being provided with a slot 39. A suitable securing element, such as a screw 40, projects through the slot 39, through the plate 32, and into the side rail 24. The slot 39 permits the spring member 31 to slide up and down relative to the plate 32. 'I'he spring member 31 is further provided with an upper flexible bowed portion 4I and a lower bowed portion 42, the portions 4I and 42 slidably engaging the web 28.

In use, the spring sash balancer of the present invention will serve to maintain the lwindow sashes immobile in their various adjusted positions. It is to be understood that one of the spring sash balancers is provided for each of the window sashes. Thus, the spring sash balancer 3| will maintain the upper sash 22 immobile in its adjusted position and will not interfere with normal manual raising or lowering of this Window sash. When the window sash 22 is not moving or when it is stationary, the bowed portions 4| and 42 of the spring member 31 will bear against the web 28 to prevent accidental sliding movement of the sashes. Then, when the window sash 22 is raised, the spring member 37 will slide Kdownwardly relative to the plate 32. Thus, the at intermediate portion 33 and the lower iat portion 36 of the plate 32 will permit the ends of the spring member 37 to move downwardly along the plate 32, so that the window sash 22 can be easily ,t

raised. However, to prevent accidental lowering of the window sash 22, it will be seen that not only do the bowed portions 4i and 42 bear against the webs 28, but also the ends of the spring member 3l will engage the bowed portions 434 and 35 during the lowering movement. Thus, during lowering of the window sash `22, the bowed portions 34 and 35 will help increase tension or Aprovide resistance against this lowered move ment. The window sash 22 can be readily removed if desired by manually moving the window sash 22 to the left, Figure 1, so that the spring sash balancer will be compressed, whereby the right side of the window sash 22 can be disengaged from the jamb i4 and removed.

However, it is to vbe understood that the spring sash balancer can be installed in various types of windows, and the balancer permits the sashes to be raised with ease, but the baiancers prevent the sashes from dropping down when wet or dry. The jamb I5 may be of one-piece construction, and the liner I8 may be made of metal. The tension on the spring balancer is released when the sash is raised up, and the tension is increased when the sash is lowered, so that the sash will not accidentally drop down.

The sash balancer of the present invention further includes a coil spring 43, Figure 2, which serves to increase the tension when the sash is lowered. Further, the spring 43 acts as a safety which insures that the spring member 31' will always be pulled upwardly when 'the sash is lowered, thus insuring that there will be increased tension when the sash is lowered. One end lof the coil spring 43 is connected to a projecting portion 45 on the spring member 31, while the other end of the coil spring 43 is connected to a portion 44 that projects from the plate 32.

What is claimed is:

In a spring sash balancer, a iirst plate including an intermediate flat portion, the upper end of said plate being provided with a iirst outwardly extending ilexible bowed portion, a second outwardly bowed iiexible portion on said plate spaced from the bottom thereof, a spring member including a central at portion provided with a slot, a securing element extending through said slot and through said plate, said spring member being provided with a pair of outwardly bowed spring portions for coaction with the bowed portions or" said plate, and a coil spring having one end connected to said spring member and its other end connected to said plate, the ends of said spring member selectively engaging the bowed portions of said plate.

References Cited in the file of this patent UNITED STATES PATENTS i Number Name Date 451,826 Koontz May 5, 1891 460,690 Morstatt Oct. 6, 1391 1,713,935 Thorsley May 21, 1929 1,772,765 Vincent Aug. 12, 1930 2,433,835 Beil Jan, 6, 1948 FOREIGN PATENTS Number Country Date 441,69? Great Britain Jan. 24, 1936

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