AN IMPROVEMENT IN SASH FASTENINGS to bes
Year: 1885

page_text: I EDWIN SHOWELL of the firm of Edwin Showell and Sons of Lower Loveday
Street Birmingham in the County of Warwick Brassfounders do hereby declare
the nature of the said Invention for "AN IMPROVEMENT IN SASH FASTENINGS
to be as follows:-
دو
The object of my invention is to prevent the jointed arm of the sash fastening
from being pushed back so as to unfasten the sashes by means of a knife or
instrument inserted between the sashes.
Sash fastenings as ordinarily constructed consist of two parts fixed respectively
on the meeting rails of the upper and lower sashes the base plate of the part which
is fixed to the meeting rail of the upper sash being provided with a jointed arm
which jointed arm is engaged to fasten the sashes under a horizontal curved fixed
arın called the quadrant on the base plate of the other part of the fastening which
is fixed to the meeting rail of the lower sash.
My invention consists in constructing in the manner herein after described the
curved arm or quadrant of the sash fastening whereby it is made to act as a guard
or protector to the jointed arm of the said sash fastening. In the ordinary quadrant
the vertical part or shank is situated within the base plate carrying it. According
to my invention I make the said vertical part or shank of the quadrant or arm
project over the inner edge of the base plate so that when the sash fastening is fixed
in its place the said projecting part of the quadrant overhangs and crosses the
junction of the meeting rails of the two sashes. The said projecting part of the
quadrant is situated in the fastened sashes in front of the jointed arm and acts as
a guard to the said jointed arm. When a knife or other instrument is introduced
between the sashes the said knife strikes against the guard or projecting part of
the quadrant and is hence prevented from acting upon and pushing back the jointed
arm for unfastening the sashes.

page_text: An Improvement in Sash Fastenings.
I EDWIN SHOWELL of the firm of Edwin Showell and Sons of Lower Loveday
Street, Birmingham in the County of Warwick Brassfounders do hereby declare
the nature of my Invention for "AN IMPROVEMENT IN SASH FASTENINGS" 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 prevent the jointed arm of the sash fastening
from being pushed back so as to unfasten the sashes by means of a knife or
instrument inserted between the sashes.
Sash fastenings as ordinarily constructed consist of two parts fixed respectively
on the meeting rails of the upper and lower sashes the base plate of the part which
is fixed to the meeting rail of the upper sash being provided with a jointed arm
which jointed arm is engaged to fasten the sashes under a horizontal curved fixed
arm called the quadrant on the base plate of the other part of the fastening which
is fixed to the meeting rail of the lower sash.
My invention consists in constructing in the manner herein after described, the
curved arm or quadrant of the sash fastening, whereby it is made to act as a guard
or protector to the jointed arm of the said sash fastening. In the ordinary quadrant
the vertical part or shank is situated within the base plate carrying it. According
to my invention I make the said vertical part or shank of the quadrant or arm
project over the inner edge of the base plate so that when the sash fastening is
fixed in its place the said projecting part of the quadrant overhangs and crosses
the junction of the meeting rails of the two sashes. The said projecting part of the
quadrant is situated in the fastened sashes in front of the jointed arui and acts as
a guard to the said jointed arm. When a knife or other instrument is introduced
between the sashes, the said knife strikes against the guard or projecting part of
the quadrant and is hence prevented from acting upon and pushing back the jointed
arm for unfastening the sashes.
Figure 1 of the accompanying Drawing represents in plan and Figure 2 in side
elevation a sash fastening containing my improvement, the meeting rails of the
sashes being represented in section in Figure 2; Figure 3 is a side elevation, partly
in section, of the fixed curved arm or quadrant and the base plate carrying it.
The same letters of reference indicate the same parts in the several Figures of
the Drawing.
a is one part of the sash fastening fixed to the meeting rail cof the upper sash
and b is the other part of the sash fastening fixed to the meeting rail d of the
lower sash; e is the jointed arm turning on the part a and f is the fixed curved
arm or quadrant under which the jointed arm e passes to fasten the sashes, the said
part being fixed on the base plate of the part b; g is the projecting part or guard
of the quadrant f, the said projecting part or guard g overhanging and crossing the
junction of the two meeting rails c, d in the manner represented in Figure 2. When
the sashes have been fastened by the engaging of the jointed arme with the
quadrant the projecting part or guard g of the said quadrant is situated in front
of the said engaged jointed arm e as seen in Figures 1 and 2 so that when a knife

page_text: or instrument is introduced between the sashes it strikes against the said guard or
projecting part g of the quadrant. As the knife or instrument cannot reach and
act upon the jointed arm e the unfastening of the sashes by the pushing back of the
said arin e is prevented.
Or the same result may be obtained by making the projection or guard on the
plate carrying the quadrant instead of on the quadrant itself.
This modification is represented in plan in Figure 4 and the plate carrying the
quadrant, together with the projection or guard, is represented in plan in Figure 5
and end elevation in Figures 6.
The quadrant is made in the usual way, that is, its vertical part or shank is
situated within the line of the base plate band instead of continuing the vertical
part or shank of the quadrant outwards as before described and illustrated, the
base plate b is continued outwards forming as it were an outward prolongation of
the quadrant but in a lower plane. The projection on the base plate b is marked b
and constitutes the guard against which a knife or instrument introduced between
the sashes strikes, the said projection or guard on the base plate acting in the same
way as the projection or guard g on the quadrant. When the jointed arm e is
engaged under the quadrant fit crosses a portion of the projection or guard b³ on
the base plate b in the manner shown in Figure 4.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed I declare that what
I claim as my invention is
Making on the vertical part or shank of the quadrant of the sash fastening or
on the base plate carrying the quadrant, a projection or guard of the kind described
and represented which projection or guard overhangs or crosses the junction of the
meeting rails of the two sashes and prevents the jointed arm of the sash fastening
from being pushed back by a knife or instrument introduced between the sashes
substantially as herein before described and illustrated in the accompanying
Drawing.