Improvements in Methods of Raising and Lowering Sash Windows.
Year: 1894

page_text: Date of Application, 19th Feb., 1894
Complete Specification Left, 24th Oct., 1894-Accepted, 1st Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Methods of Raising and Lowering Sash
Windows.
I WILLIAM STANFORD FOSTER of 140, Church Street, Stoke Newington, in
the County of Middlesex, Carpenter do hereby declare the nature of this invention
to be as follows:-
The object of my invention is to provide an appliance for use in raising and
lowering windows without the aid of sash weights and cords, and to obviate also
the cutting away of the window frame for sash weight pockets. In forming my
approved appliance I make a serrated rack, with curvilinear indentations, of any
metal, but preferably of cast or malleable iron, placed on the edge or side standing
out from the window frame. This rack is fixed to the window frame either by
dovetail projections and recesses at top and bottom end or by means of screws
countersunk in the woodwork so as to offer no obstruction to the raising and
lowering of the sash. On the side or outside edge of the window frame I fix one
or more steel springs of proportionate size and strength. These springs being in
the shape of a bow, press against the rack, and prevent the window, when raised,
from falling or shaking. The usual methods of fastening may be employed.
In order to facilitate the fixing of the window in the frame, I make the inner
bead removable, so that the sash may be withdrawn for purposes of cleaning.
Dated this 19th day of February 1894.
JOHN BLACK,
Agent for Applicant.
Improvements in Methods of Raising and Lowering Sash
Windows.
1, WILLIAM STANFORD FOSTER of 140 Church Street Stoke Newington in
the County of Middlesex Carpenter, 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 :-
The object of my invention is to provide an appliance for use in raising and
lowering windows without the aid of sash weights and cords; and to obviate also
the cutting away of the window frame for sash-weights & pockets. In my improved
appliance provide in the window frame a metal wavy rack with sides or surfaces
polished and on the window sash I fix at the side so as to engage with this rack a
spring of steel bent in the form of a bow. The action is therefore that when it is
desired to raise or open the window it is sufficient to lift the same, the spring
keeping the tension by pressure in the corrugations of the rack and supporting the
sash in an open position.
To close the sash it is enough to draw it down by its own weight. The usual
fastenings are used.
Although primarily designed for windows in buildings it is obvious that my
invention may also be used for carriage and railway carriage windows.
In order that my invention may be better understood reference is made to the
accompanying drawings in which

page_text: Fig. 1 shews a portion of the rack a which is fixed within the framing of the
window.
Fig. 2 is a portion of a sash frame with the spring b which engages the rack
shewn in Fig. 1. and
Fig. 3 is an elevation of a window with a portion broken away to shew the
method of attachment of the rack and the mode of application of the device.
A single rack and spring may be found sufficient for light sashes but for heavier
sashes a rack and spring should be attached to both sides of the sash frame.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. An appliance consisting of a wavy or corrugated rack and spring as described
and illustrated substantially and as set forth.
Dated this 24th tow of October 1004
JOHN BLACK,
Agent for Applicant.