Improvements in Window-sashes.
Year: 1896

page_text: Date of Application, 30th July, 1896
Complete Specification Left, 6th Apr., 1897-Accepted, 22nd May, 1897
Improvements in Window-sashes.
I, ROBERT SUTHERLAND, of 687 Boylston Street, in the City of Boston, in the
County of Suffolk, State of Massachusetts, United States of America, Janitor, do
hereby declare the nature of this invention to be as follows:-
The object of the invention is to so construct a window-sash that the space between
the side bars and the casing, as well as the space between the meeting rails, and that
between the lower rail and the casing, will be effectually closed against the passage
of wind or dust, and this without causing the undue binding of the sash and
consequent difficulty of sliding the same.
To attain this end, I take a sash having side bars connected by upper and lower
rails. In the edges of the side bars and lower rail and in the side of the upper rail
I form longitudinal grooves and in these grooves I mount closing strips which are of
less width than the grooves and are furnished with felt coverings to serve as packings
between the edges of the strips and the window frames.
The manner of mounting these strips is as follows;-I form two, or more,
perforations in each strip and about each perforation I make a recess extending
partially through the strip and larger than the perforation. 1 now pass a screw
through the perforation, its head resting in the recess, and on the exposed portion of
the screw I mount a small spiral spring. The screws now being secured in the
grooves of the window-sash rails form supports on which the strips may move, these
strips being pushed outward by the spiral springs, located between the strips and
the bottoms of the grooves, until the screw-heads prevent further outward
movement.
Dated 1 CL 1
ممم
ROBERT SUTHERLAND.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in Window-sashes.
I, ROBERT SUTHERLAND, of No. 687 Boylston Street, in the City of Boston, in the
County of Suffolk, State of Massachusetts, United States of America, Janitor, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention has reference to improvements in window sash.
The object of the invention is to so construct a window sash that the space between
the side bars and the casing, and between the meeting rails of two sash, will be
effectually closed against the passage of wind or dust, and this without causing the
undue binding of the sash and the consequent difficulty of sliding the same.
The invention consists in the peculiar features of construction and combination of
parts, whereby the object of the invention is accomplished, as will hereinafter be more
fully described and pointed out in the claims.
Figure 1, represents an elevation of the improved sash, part of one side-bar being
broken away.

page_text: Figure 2, represents an enlarged detail view of portions of the same.
Figure 3, represents an enlarged cross-sectional view of one of the side bars.
Similar numbers of reference designate corresponding parts throughout.
Between the side bars of a window-sash and the side frames of a window frame, a
looseness of fit is generally allowed, to effect the easy sliding of the sash in the frame;
this looseness of fit varies in degree, but is always sufficient to permit gusts of wind,
carrying dust, to enter the building. The usual course taken to close the space, is to
secure weather-strips against the casing and in such intimate contact with the sash as
to effectually prevent its movement, for, if the strips are not so secured, they are
ineffectual for preventing the entrance of air. These strips are very quickly worn
away, become loosened, and by catching on the sash, are broken and disfigured.
In carrying my invention into practice I take a sash having the side-bars 5 and 6,
the lower rail 7, and the meeting rail 8. In the edges of the side-bars 5 and 6, I form
vertical grooves 9 and 10, the walls 11-11 of which are parallel throughout,-in
the front or rear of the meeting-rail 8, I form a horizontal groove 12, extending
between the upper ends of the grooves 9 and 10, and also having parallel walls.
In the grooves 9 and 10, of the side-bars 5 and 6, and in the groove 12, I mount
the closing strips 13, 14 and 15, which are of considerably less width than the
grooves, and are furnished with the fibrous covering 16 serving as a packing between
the sides of the strips and the walls 11-11 of the grooves, to effect a complete
contact therewith, while allowing for free movement of the strips, that portion of
the fibrous covering extending over the edges of the strips serving as a packing
between the strips and the side frames, or between the strip in the meeting-rail 8, and
a corresponding portion of another sash.
The manner of operatively mounting the closure strips is as follows:-In each of
said strips 13, 14 or 15, are formed a plurality of recesses 17, connected with the back
of the strip by perforations, through these perforations extend screws 18; the heads
of which loosely fit in the recesses 17; these screws are secured in that portion of
the sash-frame in which-the groove is formed, and spiral springs 19, are mounted on
the shanks of the screws between the strip and the bottom of the groove, the resilience
of these springs tending continuously to press the strip outward on the screws and
to close the space adjacent to the sash, without binding thereon.
The lower rail may also be furnished with a similar strip 20, operatively mounted
in a longitudinal groove in said rail, the construction and operation being similar to
that of the strips 13 and 14 herein before described.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
Claim 1. In a window sash, the combination with a bar or rail thereof having a
longitudinal groove, of a spring-operated strip operatively mounted in said groove,
and having a fibrous covering bearing on the walls of the groove.
Claim 2. The combination with a window sash having the grooved bars 5 and 6,
and the grooved rail 8, of the strips 13, 14 and 15, each having a fibrous covering 16,
and the recesses 17, with their perforations, the screws 18, extending through said
perforations and secured in the sash, and the springs, as 19, mounted on the screws
and acting to press the strips outward, as described.
Dated this 21st dow of March 1807
ROBERT SUTHERLAND.
In presence of
L. H. READ.
H. J. MILLER.
Haseltine, Lake & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.