Improvements in the Construction and Fitting of Window Sashes and their Frames.
Year: 1890

page_text: Date of Application, 17th July, 1890
Complete Specification Left, 11th Apr., 1891--Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction and Fitting of Window Sashes and
their Frames.
I, THOMAS DOWNIE of 2 Radnor Terrace Glasgow, in the County of Lanark,
Clerk do hereby declare the nature of this invention to be as follows:-
My invention has for its object the constructing of window sashes and sash
frames in an improved mauner so that the window can be readily swung into the room.
In order to carry out my said invention 1 form on each side of the window frame
or casement two vertical grooves or guides in which suitable slides are placed. A.
slide on one side is attached by chain or rope passing over a pulley in the casement
stile to a weight at the side of the casement, and the corresponding slide at the
opposite side is also attached by rope or chain passing over a series of pulleys, along
the top of the casement and down to the same weight, so that the slides being both
attached to the same weight rise or fall simultaneously. To each pair of these
slides a sash is attached by hinges, slipbolts or other suitable contrivance so that
the sashes have not only the ordinary up and down sliding motion but can also be
readily swung into the room for cleaning painting etc.
Dated this Sixtoanth day of Jul. 1900
COMPLETE SPECIFICATION.
Improvements in the Construction and Fitting of Window Sashes and
their Frames.
1, THOMAS DOWNIE, 2, Radnor Terrace, Glasgow, in the County of Lanark,
North Britain, Clerk, 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, that is to say :-
My said invention has for its object the constructing and fitting of window
sashes and sash frames in an improved manner so that the sashes can be readily
swung into the room for cleaning or other purposes.
Various arrangements of window sashes and accessory parts have been tried or
proposed in which whilst the sashes can slide up and down like ordinary sashes,
they are made capable of swinging inwards as well, the sashes being in some cases
combined with slides on one or both sides and in other cases arranged without such
slides but with movable or adjustable parts on which the sashes have to turn as on
hinges when being swung inwards.
Whilst in carrying out my invention I may adopt any convenient arrangement
of the kind hereinbefore referred to, I combine therewith an important arrangement
of the weights by which the sashes are supported, which arrangement is such that
the sashes and any parts moveable up and down therewith are equally and
properly supported in all positions of the sashes.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings to
be hereinafter referred to and representing examples of window fittings embodying
my improvements.
Figure, 1, on the sheet of drawings is a perspective inside elevation of a window
showing both sashes as swung inwards. Figure, 2, is a horizontal section as with
the sashes in the ordinary position, and Figure, 3, is a horizontal section as with
the sashes swung a little inwards. Figure, 4, is an inside elevation showing the

page_text: upper sash and the arrangements for supporting. Figure, 5, is a view like part of
Figure, 4, but showing a slight modification. In these drawings the same reference
letters are used to mark the same or like parts wherever they are repeated.
in carrying out my invention according to the modification shown in the
drawings, I form at each side of the window frame, A, two vertical guide grooves
like those of ordinary windows and I provide and fit four slides, B1, B2, B3, B4,
to move mp and down in such guide grooves. The lower or inner sash, C, is at one
side hinged to one slide, B 1, and at its other side it interlocks with the opposite
slide, B2, when the sash is in its closed position as shown in Figure, 2, the said
interlocking being effected by a metal rib, D, on the edge of the sash entering a
groove in a metal fitting; E, fixed to the slide, B 2. In a similar way the upper
sash, C1, is at one side hinged to one slide, B3, and when turned in a rib, D1, at
its other side interlocks with a groove in a metal fitting, E1, fixed to the other
slide, B4. The lower and inner sash, C, may be attached to its slide, B1, by
ordinary hinges or in an equivalent manner. The upper sash, C1, is fitted to turn
on centre pins upon brackets, F, F 1, fixed to the slide, B 3, these centre pins being
at such a distance from the side of the window as to allow the upper and outer
sash, C1, to swing well inwards into a position clear of the lower sash. The
slides, B1, B2, B3, B4, are kept in their guide grooves by slips, K, of wood or
metal which enter grooves in the sides of the slides and are screwed to the window
frame.
Each sash is entirely supported by a single weight, G, which has attached to it
two cords, H, H. 1. One cord of each sash passes round a pulley, J, and has its end
fixed to the slide, B2, or B4, at the side nearest the weight. The other cord, H 1,
passes round a pulley, 1, and proceeds thence across, along the top of the window
frame, and is at the other side guided by pulleys, J 2, J3, and has its end fixed to
the slide, B1, or B 3. In the modification shown in Figure, 5, the cord, H 1, is
shown as passing across along a groove or space within the window frame instead of
above it.
The weight, G, in each case counterbalances the aggregate weight of the sash, C,
or C 1, and the slides, B1, and B2, or B 3, and B 4, appertaining thereto.
When a sash is swung in there will be more weight on one cord than on the other,
but the total acting on both cords will remain the same as when the sash is turned
close and has both sides attached to its slides.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
In connection with window sashes arranged to swing inwards as well as slide
vertically, the employment of a single weight to support both sides of a sash by
means of two cords one passing round a single pulley at one side and the other
being guided by pulleys so as to proceed across the top of the window to the other
side substantially as hereinbefore described.
Dated this Tenth day of April 1891.
EDMUND HUNI,
Applicant's Agent.