Window Sash Fastenings.
Year: 1898

page_text: Date of Application, 8th Feb., 1898-Accepted, 9th Apr., 1898
Window Sash Fastenings..
A
I, GEORGE WALTON WESTGARTH, 133, "Severn Road, Cardiff,' Glam.; Engineer,
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:
.
-
My invention consists of a sash fastener that will fasten the window while partly
open as well as when closed the object of which is that the window may be left
partly open at the top at any time for the purpose of ventilating the room and at
the same time have it safely fastened, further one that will engage automatically
when the window is closed, so that the window cannot remain unfastened by forget-
fulness, which frequently happens with the ordinary bar fastening, & lastly a
fastening that cannot be opened by passing a knife up between the sashes.
To carry out my invention I make a small pedestal, of any suitable metal either
cast or stamped. Into this pedestal I hang with a pivot a specially shaped lever,
one end acting as a balance weight to the other end, which has a
semi-conical "
recess formed in it, one facet being on the line which intersects the perpendicular
line drawn from the centre of the pivot in which the lever is hung, from this facet
another shorter facet is made at right angles, and from this again another facet at
an obtuse angle is made, these three facets forming a semi-conical recess.
I then make a companion fastening having one or more semi-conical "lugs" so
that it may engage wedge-like with the semi-conical recess in the lever.
In order that my invention may be more clearly understood I attach a sheet of
drawings in which. Fig. 1 is an illustration shewing an elevation of the pedestal,
which I attach to the inside or bottom sash, with screw nails in the ordinary way,
& into which the lever is inserted..
Fig. 2 is an illustration shewing the section of Fig. 1 on line A-A.
Fig. 3 is an illustration shewing an elevation of the lever with its semi-conical
recess formed by the facets marked R R1 R2. Facet Ŕ being on the line
marked B-B which intersects the perpendicular line marked E. The object of
this is, when the fastening is engaged with its companion any pressure from the
outside of the window, will be on the pivot, it is therefore impossible for any
one to undo the lever, from the outside, but it can be undone quite easily from the
inside by raising the lever. When the window is open and the fastening is dis-
engaged, the end of the lever, which acts as a counterbalance is thrown over
towards the glass of the upper sash so that it crosses the line which divides the
two sashes, and when the top sash is shut up the top part of the companion fasten-
ing knocks over the lever, and its semi-conical recess engages automatically.
will therefore be understood that facet R when the lever is engaged, is paralell to
line D-D in Fig. 1 and also to line F-F in Fig. 6.
Fig. 4 is a section of Fig. 3 on line C-C.
It
Fig. 5 is an illustration shewing an elevation of a companion, with two semi-
conical lugs, which I fix on to the top sash on a line with the lever PP are the ports,
into either of which the lever may enter as may be required, when the lever is in

page_text: the first port the window is closed & fastened, & when it is in the second port the
window is partly open but fastened.
Fig. 6 is a section of Fig. 5 on line H-H shewing the semi-conical lugs L L
which engage wedge-like with the semi-conical recess in the lever.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed I declare that what I
claim is:-
1stly. A window sash fastening having a lever in which a semi-conical recess is
formed substantially as described and illustrated.
2ndly. The companion fastening having a semi-conical lug or lugs substantially
as described & illustrated.
3rdly. Window sash fastenings substantially as described & illustrated in the
manner and for the purposes herein before described.
Dated this 7th day of February 1898.
GEORGE WALTON WESTGARTH.