IMPROVEMENTS IN WINDOW SASHES AND FRAMES, PART OF WHICH INVENTION IS FOR THE PURPOSE OF VENTILATION
Year: 1881

page_text: LETTERS PATENT to Alfred Bedborough, of 18, Abingdon Street, in the City
of Westminster, Architect, for an Invention of "IMPROVEMENTS IN WINDOW
SASHES AND FRAMES, PART OF WHICH INVENTION IS FOR THE PURPOSE OF
VENTILATION"
PROVISIONAL SPECIFICATION left by the said Alfred Bedborough at the
Office of the Commissioners of Patents on the 23rd September 1881.
"
ALFRED BEDBOROUGH, of 18, Abingdon Street, in the City of Westminster,
Architect. IMPROVEMENTS IN WINDOW SASHES AND FRAMES, PART OF WHICH
INVENTION IS FOR THE PURPOSE OF VENTILATION."
My Invention relates to the improved construction of window sashes and frames,
and the chief objects of my improvements are to provide,—
(1.) Means of ventilation which does not necessitate opening the window, and by
which exposure to wind and severe draughts is avoided.
(2.) Means whereby the window sashes may, in addition to the ordinary sliding
vertical movement, bo opened in a horizontal position, affording among other
advantages improved facilities for the cleaning of the said window.
To obtain the first object, I make one of the sashes, preferably the upper one,
conveniently higher than the opening in the casement it covers. This excess height
may be varied considerably, but I find a convenient height for the said sash to bo
about 25 per cent. in excess of the ordinary height. In the reveal of the window,
when the upper sash is heightened, I form a chamber to receive the excess height
of the sash, so that by lowering the upper sash but so moderately as not to
withdraw it entirely out of the chamber in the reveal, the parting of the horizontal
sash stiles allows of the passage of air between the sashes, and provides means of
ventilation.
To obtain the second object, I construct the sash seperate from the pulley stiles,
and swing it between the said sash stiles by means of pivots or pins in the centro
of the sash, or in other position as may be preferred or as circumstances may
require, and I provide bolts or other suitable means of locking the sash to the
pulley stiles. This arrangement allows of the sash being opened in the usual
manner by being raised or lowered together with the pulley stiles between the saslı
liner, or of its being opened by unlocking it, and swinging it on its pivots between
the sash stiles.
The above improvements may be used separately or in combination, and the
last named improvement is especially applicable to existing windows or casements.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, and of
an Order of the Lord Chancellor, filed by the said Alfred Bedborough in the
Great Seal Patent Office on the 22nd April 1882.
ALFRED BEDBOROUGH, of Abingdon Street, in the City of Westminster.
"IMPROVEMENTS IN WINDOW SASHES AND FRAMES, PART OF WHICH INVENTION
IS FOR THE PURPOSE OF VENTILATION."
My Invention relates to the improved construction of window sashes and frames,
and the chief object of my Invention is to provide means of ventilation which does
not necessitate opening the window, and by which exposure to wind and severe
draughts is avoided, to which improvement I sometimes combine means whereby
the window sashes may, in addition to the ordinary sliding vertical movement, be
opened in a horizontal position, affording, among other advantages, improved
facilities for the cleaning of the said windows.
In the accompanying Drawing Figs. 1 and 3 show my improved window with
both sashes closed; Figs. 2 and 4 shew my improved window with the upper sash
lowered for the purposes of ventilation; and Figs. 2 and 5 shew ny improved
window with both sashes opened on their pivots for cleaning or other purposes.
This
My first improvement consists in making one of the sashes, preferably the upper
one, conveniently higher than the opening in the casement it covers.
excess height may be varied considerably, but I find a convenient height for the
said sash to be about 25 per cent. in excess of the ordinary height. In the soffit of
the window frame, when the upper sash is heightened, I form a chamber to receive
the excess height of the sash, so that by lowering the upper sash but so moderately
as not to withdraw it entirely out of the chamber in the soffit, the parting of the
horizontal sash stiles allows of the passage of air between the sashes, and provides
means of ventilation.
Reference being had to the accompanying Drawing, Fig. 1 is a sectional elevation
of my improved window, and Fig. 3 an insido elevation, shewing both sashes
closed; Fig. 2 is a sectional elevation, and Fig. 4 an inside elevation, shewing the
upper sash lowered for ventilation; and Fig. 6 is a sectional plan of Fig. 1, shewing
the arrangement of the sashes and frame.
In the aforesaid Figures, A is the upper sash and B the lower sush, and C the
chamber in the soffit; and it will be evident that by lowering the sash A out of
the chamber C to the line of the soffit, air will enter into the room from between
the sashes in an upward or vertical direction.
Fig. 7 is an enlarged sectional plan of sash and sash frame, in which d is the
sash frame; c, the pulley stile; the outside lining; g and h, the sashes; and
i, the inside bead, shewing my method of preventing ahaking and rattling of the
Fashes, and the entrance of draughts from between them by grooving the outside
lining and the inside bead or moulding i, and forming a corresponding tongue
upon the sashes g and h, which works in the said grooves.
Fig. 5 is an inside elevation, and the dotted lines in Fig. 2 a side elevation of
my improved window, when I combine the arrangement for opening tho sashes
upon their pivots for cleaning and other purposes, with my herein before described
arrangement for providing means of ventilation.
The sashes a and b are constructed separate from the pulley stiles, and swung
between the said sash stiles by means of pivots or pins J, J, in the centre of the
said sashes; or the pivots or pins may be placed in such other position as special
circumstances may require, and I provide bolts or other suitable means of locking
the sashes to the pulley stiles.

page_text: The foregoing arrangement allows of the sashes being opened in the usual
manner by being raised or lowered together with the pulley stiles between the
sash lines, as well as by unlocking and swinging them on their pivots between the
sash stiles.
In place of the small panes in the portion of the upper sash which enters the
chamber in the soffit, I sometimes substitute leaded lights, and I would have it
understood that other modifications in the design and construction of my improved
window may be made without departing from my Invention.
I claim as my Invention the improved construction of window sashes and frames
for providing means of ventilation, substantially as hereinbefore described and
illustrated by Figs. 1, 3, 4, 6, 7, and the lines in full in Fig. 2.
I am aware that the improved arrangement described and illustrated by Fig. 5
and the dotted lines in Fig. 2, enabling sashes to be opened on pivots for cleaning
and other purposes is not new, and I do not claim as my Invention the use of the
said arrangement by itself or apart from the other portions of my Invention; but
I do claim the use of the said arrangement, substantially as described and illus-
trated by Fig. 5 and the dotted lines in Fig. 2 in combination with the improved
construction hereinbefore described and illustrated by Figs. 1, 3, 4, 6, 7, and the
lines in full in Fig. 2.
In witness whereof, I, the said Alfred Bedborough, have hereunto set my
hand and seal, this Twenty second day of April, in the year of our Lord
One thousand eight hundred and eighty two.
ALFRED BEDBOROUGH. (L.S.)