US2122576A

US2122576A - Window sash balance

Info

Publication number: US2122576A
Application number: US186065A
Authority: US
Inventors: Larson Algot
Original assignee: UNIQUE BALANCE Co
Current assignee: UNIQUE BALANCE Co
Priority date: 1938-01-21
Filing date: 1938-01-21
Publication date: 1938-07-05
Anticipated expiration: 1955-07-05

Description

July 5,' 1938. A. LARSON WINDOW SASH BALANCE Filed Jan. 21, 1938 Patented July 5, 1938 WINDOW SASH BALANCE Aigot Larson, New York, N. Y., assignor to Unique Balance Company, New York, N. 1., a corporation of Illinois Application January 21, 1938, Serial No. 186,065

2 Claims. (01. 1619'l) UNITED STATES PATENT OFFICE 1 This invention relates to window sash balances of the general character of that shown in Letters Patent of the United States No. 2,041,646, dated May 19, 1936, granted to Unique Balance Compam as the assignee of Algot' Larson, in which each sash is counterbalanced by a coiled spring or coiled springs with which is associated a metal tube for the purpose of preserving the slimment of the spring or springs andin which in o the movement of the sash there is more or less relative movement in contact as between the tube and the spring or springs. It has been found that in the operation of such window sash balances that in the movement of the sash there is some grating noise caused by the relative movement of the spring or springs and the tube in contact and some condensation of moisture on the surface of'the tube, either internal or external, which tends to cause corrosion of the spring or springs. It is the object or this invention to provide means for deadening the sound and, as well, for absorbing such moisture and in accordance with the invention there is provided for such tube, either externally or internally or both, a lining, as of paper or other similar material, whichin practical operation has been found to overcome the difficulties referred to.

In the drawing, in which the invention is illustrated- Figure 1 is a view, partly in elevation and partly in section, of a window to which the invention is applied.

Figure 2 is a view in perspective of a strip of sheetmetal, adapted i'orthe formation of the tube, with the paper-like lining applied thereto. partly broken away.

Figure 3 is a cross-section or the same on a larger scale.

Figure 4 is a view in cross-section of a tube 40 with the paper-like liningsapplied thereto.

Figure 5 is a detail view of the same in'vertical section, the counterbalance springs and spiral being also shown, and

Figure 6 is a detail view similar to Figure 3.

5 but showing the lining applied to both sides of themetal sheet from which the tube is formed.

Thewindow frame, in which the present invention is to be embodied, may have as usual a head or lintel a, a jamb a with a parting strip a and a sill a the upper sash b and'the lower sash b being arranged to move vertically in the frame. For each upper sash and each lower sash there is provided at each side a. counterbalance which, as fully explained in said Letters Patent, is connected to the respective sash, such counterbalance comprising an alining tube 10 c, an internal torsion spring (2, a long spiral member e, and an external supplemental extension spring a.

The alining tube 0 is formed of a metal strip 0 whichhas secured to it, as by cement,.before 15 rolling, at one side, as shown in Figures 2 and 3,

a lining sheet c of paper or other similarmaterial, or as shown in Figures 4, 5 and 6, at the other side also, a similar lining sheet 0 Tough paper is found to be a suitable material for the 20 linings.

It will now be understood that such lining of the tube, whether internal 'or external, serves to deaden the sound due to the relative movement in contact of the adjacent internal spring or ex- 25 ternal spring or both, as the case may be, and serves also to absorb such moisture as may gather on the adjacent surface of the tube and so protect the spring or springs from corrosion.

I claim as my invention: 0 I

1. In a window sash balance, the combination of a counterbalance spring, and a metal springalining tube, the tube having adjacent the spring a lining of paper-like material whereby the sound of relative movement between the spring and the tube is deadened and provision is made for absorption of moisture.

2. In a windowsash balance, the combination of a metal spring-alining tube, a torsional spring within the tube, and a tension spring outside the 40 tube, the tube having on each side a lining of paper-like material whereby the sound of relative movement between the springs and the tube isdeadened and provision is'made for absorption of moisture.

' ALGOT LARSON.