An Improved Safety Window Fastening.
Year: 1888

page_text: Date of Application, 23rd Aug., 1888
Complete Specification Left, 23rd May, 1889-Accepted, 13th July, 1889
PROVISIONAL
ECD
TION.
An Improved Safety Window Fastening.
I, THEOPHILUS LESSEY HARGREAVES, of Cleveland Street, Hull, Black-lead and
Blue Manufacturer, do hereby declare the nature of this invention to be as
follows:
This invention has for its object an improved safety window fastening.
This window fastening is constructed as follows:-to the upper sash there is
fastened in the ordinary position and by means of screws a hinge piece to which a
flap is jointed. This flap when the window is closed can be made to fold down into
an horizontal position across the top rail of the lower sash. The flap has a latch
piece connected with it by a hinge joint and this after the flap has been folded down
as described can be turned down and made to engage beneath the lower edge of a
metal plate fixed upon the front of the upper rail of the lower sash. Thus this
improved fastening consists of four parts, the hinge piece, the flap, the latch piece and
the plate with which the latch engages.
The hinge piece, the flap and the latch are connected by parallel hinge joints one at
each end of the flap and these joints are so constructed that the parts of the fastening
cannot come into contact with the glass.
It will be observed that in this fastening there is no spring; also that when the
flap is turned down the latch will hold the sashes closely together and cannot be dis-
placed by any instrument inserted from the outside between the sashes.
On the other hand the latch is easily freed from within simply by lifting it with
the fingers.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
An Improved Safety Window Fastening.
1, THEOPHILUS LESSEY HARGREAVES, of Cleveland Street, Hull, Black-lead and
Blue Manufacturer, 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 has for its object an improved safety window fastening.
This window fastening is constructed as follows:-to the upper sash there is fastened
in the ordinary position and by means of screws a hinge piece to which a flap is
jointed. This flap when the window is closed can be made to fold down into an
horizontal position across the top rail of the lower sash. The flap has a latch piece
connected with it by a hinge joint and this after the flap has been folded down as
described can be turned down and made to engage beneath the lower edge of a metal
plate fixed upon the front of the upper rail of the lower sash. Thus this improved
fastening consists of four parts, the hinge pieco, the flap, the latch piece and the plate
with which the latch engages.
The hinge piece, the flap and the latch are connected by parallel hinge joints one at
each end of the flap and these joints are so constructed that the parts of the fastening
cannot come into contact with the glass.
It will be observed that in this fastening there is no spring; also that when the
flap is turned down the latch will hold the sashes closely together and cannot be dis-
placed by any instrument inserted from the outside between the sashes.

page_text: On the other hand the latch is easily freed from within simply by lifting it with
the fingers.
In order that my said invention may be more fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation of a fastening constructed according to my invention.
Figure 2 is a front elevation, and Figure 3 is a plan.
In these figures A is the rail of the upper sash of the window and A' the glass in
it. B is the top rail of the lower sash and B is the glass in it. (is the hinge piece
which is screwed to the rail A. D is the flap which is jointed to the hinge piece by
means of the pin D. E is the latch-piece which is jointed to the flap-piece by the
pin D F is the plate screwed to the rail B. The flap D may be pivotted as well
as hinged to C as shown so that it can lie along the rail A.
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 combination of a hinge-piece, a flap, a latch-piece and a part with which
the latch engages.
2. Window fastenings substantially as described and shown in the drawings.
Duted this 2nd lay of May 1889
THEOS. L. HARGREAVES.