Improvements in or relating to Window Sashes.
Year: 1892

page_text: te of Application, 21st Nov., 1892-Accepted, 14th Jan., 1893
COMPLETE SPECIFICATION.
Improvements in or relating to Window Sashes.
I, JOHN COOPER HOPE of 64 Crown Street in the City and County of
Newcastle-on-Tyne, Contractor 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 refers to improvements in or relating to window sashes and has
for its object an economical method of repairing or replacing old sashes ard of
excluding draughts in such as well as in other cases.
I will explain my invention with reference to the accompanying drawings in
which Figure 1 shows an horizontal section through sashes and pulley jamb,
Figure 2 a cross section of a sash head, Figure 3 a cross-section of the meeting
rails and Figure 4 a cross-section of the sill of a window frame and throughout
this description like letters or marks of reference designate like parts.
Referring to the drawings, in Fig. 2 it will be seen that the head of the top sash
is rebated at a and a¹ and that into these rebates the moulding band special
parting bead 6' fit when the window is shut. An ordinary draught tube c is secured
in a groove formed in the sash head and this tube when the window is closed is
squeezed into a corresponding groove formed in the window head. The tube may
be secured with glue and by means of tacks through the canvas strip attached to the
draught tube.
Similarly at the meeting rails (see Fig. 3) a draught tube c is secured and by
the increased width given by the novel design of parting bead b¹ extending into
the rebate a', this draught tube can be more effectually utilised.
In Fig. 1 is shown a special arrangement or form of window sash designed to
exclude draughts which is particularly applicable to the repair of old sashes.
At present it is customary to renew the entire sash when it becomes worn and to
substitute a new one of similarly bad design.
By my invention I take out the old sash, dress and groove its back surfaces and
nail on a slip of hard wood h (see Fig. 1) such as teak, birch or oak, the edges of
this slip extending about 1 of an inch on each side of the old sash.
The parting bead p I form as per section shown in Fig. I which thus forms &
groove on either side in which the inner extensions of the hardwood slips work,
the outer extensions working in rebates formed in mouldings m of any suitable
design.
The backs of the slips h may be grooved for sash cords in the ordinary way.
e el are the inside and outside linings, e the back, ea is the glass and the putty,
being the spaces for sash weights.
It will thus be seen that for any draught to pass sashes constructed as described
in reference to Fig. 1, the said draught will have to pass round a greatly increased
number of corners, e.g. at the corners 1, 2, 3, 4, 5, 6, 7, before it can cause any
inconvenience, while at the same time a novel, highly efficient and economical
system for the repair of old sashes is secured.
In Fig. 4, for draught exclusion I rebate the bottom sash rail rat and fix an
ordinary draught tube thereto at r¹.
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. The novel arrangement or combination of parts designed to facilitate the
repair of window sashes and to increase their efficiency for the exclusion of draughts
consisting in the provision of a hard wood slip at the backs of the sashes with

page_text: lateral extensions designed to work in grooves formed by means of a special section
of parting bead and by means of rebating the internal and external vertical
mouldings the several parts being arranged and adapted to operate substantially
as herein described and illustrated with reference to Fig. 1 of the drawings.
2. In a window the combination with the window sash frames arranged as
described and claimed in Claim 1 of the method employed for the exclusion of
draughts by rebating the top rail of top sash and the bottom rail of bottom sash and
by the employment of draught tubes, these rebates and draught tubes being
severally arranged and designed to act substantially as herein set forth:
Dated this 17th day of November 1892.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.