Патент USA US2122576код для вставки
July 5,' 1938. A. LARSON '. 2,122,576 WINDOW SASH BALANCE Filed Jan. 21, 1938 ) Patented July 5, 1938 2,122,576 UNITED STATES PATENT OFFICE _ 2,122,576 vWINDOW SASH BALANCE Aigot Larson, New York, N. Y., assignor to Unique Balance Company, New York, N. 1., a corpora tion of Illinois _ _ ‘Application January 21, 1938, Serial No. 186,065 2 Claims. (01. 16—19'l) 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 Com 5 pam 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 slim ment 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 15 is some grating noise caused by the relative movement of the spring or springs and the tube in contact and some condensation of mois The‘window frame, in which the present‘ in- ‘ vention is to be embodied, may have as usual‘a head or lintel a, a jamb a1 with a parting strip a2 and a sill a3, the upper sash b and'the lower sash b1 being arranged to move vertically in the frame. For each upper sash and each lower sash there is provided at each side a. counter balance which, as fully explained in said Let ters 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 ex - tension spring a. The alining tube 0 is formed of a metal strip 01, whichhas secured to it, as by cement,.before 15 rolling, at one side, as shown in Figures 2 and 3, a lining sheet c2 of paper or other similarma ture on the surface of'the tube, either internal - terial, or as shown in Figures 4, 5 and 6, at the _ or external, which tends to cause corrosion of the 20 spring or springs. It is the object or this inven tion to provide means for deadening the sound other side also, a similar lining sheet 03. Tough paper is found to be a suitable material for the 20 _ and, as well, for absorbing such moisture and in 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 gath er on the adjacent surface of the tube and so pro tect the spring or springs from corrosion. accordance with the invention there is provided for such tube, either externally or internally 25 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 il lustrated 30 Figure 1 is a view, partly in elevation and ’ partly in section, of a window to which the in vention is applied. . , Figure 2 is a view in perspective of a strip of sheetmetal, adapted i'or‘the formation of the 3-5 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 thelpaper-like liningsapplied thereto. Figure 5 is a detail view of the same in'vertical ‘section, the counterbalance springs and spiral - being also shown, andv , . . - - 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. linings. ' I claim as my invention: 1. In a window sash balance, the combination of a counterbalance spring, and a metal spring 30 I alining tube, the tube having adjacent the spring a lining of paper-like material whereby the sound of relative movement between the spring and the 35 tube is deadened and provision is made for ab sorption 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 rela- ' ' tive movement between the springs and the tube isdeadened and provision is'made for absorption of moisture. ' ' ALGOT LARSON.