US140783A - Improvement in window sashes and frames - Google Patents

Description

DONALD MACKAY, OF CHICAGO, lLLINOIS.

IMPROVEMENT IN WINDOW SASHES AND FRAMES.

Specification forming part of Letters Patent No. 140,783, dated July 15, 1873 application filed May 5, 1873.

To all whom "it may concern:

Be it known that I, DONALD MAOKAY, of Chicago, in the county of Cook and State of Illinois, have invented a certain new, useful, and Improved Window Sash and Frame, of which the followin g is a full, clear, and exact description which will enable others skilled in the art to which my invention appertains to make and use the same, reference being had tothe accompanying drawing forming a part of this specification, and in which I Figure l is a vertical central section of my improved window sash and frame; and Fig. 2, a horizontal section of the same in the plane of the line so a", of Fig. 1, the upper part of the sash being lowered.

Like letters of reference indicate like parts.

The object of my invention is to make the window-sash and its frame in sucha manner that weather-strips need not be employed, and so that wind, dust, rain, &c., cannot enter the window when the sash is closed; and to that end my invention consists in certain novel features, hereinafter particularly described and set forth, relating to the construction of the sash, and of the window-frame.

In the drawing, A and A represent the sash, and B is the frame in which the sash is arranged. C is the window-sill, which rises in two steps from its outer to its inner face, as shown in Fig. 1.' c c are grooves sunken longitudinally along the base of each step or ridge on the sill. The upper face of the sill, excepting that part which is interior to the sash, is inclined downward and outward, and the outer face of the upper or inner step is beveled, in the manner shown. D D are removable central ribs, each made in two parts corresponding in length to the length of the upper andlower sash, respectively, and arranged in vertical grooves sunken into the window-frame. That part of the ribs D D against which the lower sash rests, when closed, has a longitudinal groove, a, sunken in its inner face, and is soarranged that the bottom of the groove will be flush with the inner face of the upper part of said ribs, as shown in Fig. 2. The outer face of the upper part of the ribs D D is also grooved longitudinally, as shown at a. a, and the bottom of these grooves is flush with the outer face of the lower parts of the ribs D D. The sash rides on the ribs D D, and its upper and lower parts are separated by them, and are retained in the window-frame in the usual manner. The lower bar of the sash A is constructed to match that part of the sill upon which it rests, and is provided with the strip 1) set into its outer lower edge, and also matching the sill, as shown. The outer vertical edges of the sash A are provided with ribs, which ride in the grooves a a, and the sash A is provided with like ribs arranged to ride in the grooves a a. The upper cross-bar of the sash A is provided with a rib, c, which sits into a corresponding groove in the frame B, as shown. The inner face of the lower cross-bar of the sash A, and the outer face of the upper crossbar of the sash A, are beveled and matched together in the manner shown in Fig. 1. All the moving parts are constructed to fit the fixed parts as closely as possible without creating too great friction, and the removable ribs D D should be nicely fitted into their grooves.

It willbe perceived from the foregoing description, and from reference to the drawing, that rain, dust, &c., cannot enter a room through a sash and frame constructed in the manner specified without being turned from its course many times at each point at which it strives to enter, and that the matter, if any, which is driven between the sash and the frame will there remain and form a barrier to the entrance of other matter. Especially is this result produced by the grooves c c, which are arranged at the point of greatest exposure, and they will tend to turn back water lodging on the sill and driven toward the sash by the wind.

I deem it preferable to make the grooves of the lower half of the ribs D D terminate just above the lower end of the said ribs, and to make the lower bar of the upper sash so as to close the lower end of the grooves a, and cover the lower end of the outer rib formed by said groove. 7

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

The grooved window-frame B, provided with the beveled and grooved sill 0, and with the removable and grooved separating-ribs D D arranged in the vertical grooves of the frame B, in combination with a double sash, each part of which is constructed to match the other, and provided with vertical ribs arranged to ride in the grooves of the ribs D D, the lower sash being also constructed to match the sill, and the upper one to match the top of the window-frame, substantially as and for the purposes specified.

DONALD MAOKAY. Witnesses:

N. O. GRIDLEY, Jim. W. ROBERTS.

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