IMPROVEMENTS IN SASH FASTENERS
Year: 1882

page_text: C
Office of the Commissioners of Patents on the 23rd December 1882.
JAMES EDWIN COPE, of Birmingham in the county of Warwick "IMPROVEMENTS
IN SASH FASTENERS
"
This invention relates to the improvements hereinafter described in sash
fasteners for sliding sashes the improvements having for object to provide a
simple sash fastener which cannot be opened from the outside by the insertion
of a knife or other like instrument between the meeting rails of the sashes.
In carrying out my invention I employ a sash fastener of the ordinary con-
struction, and to the circle plate I pivot a swivel guard or fly which may work
either inside or outside the circle plate in such a manner that the arm or bar of
the fastening when closed will press against and hold the swivel guard or fly
transversely across the meeting rails of the sash so that if a knife or other similar
instrument were forced between the meeting rails to move the arm, the said knife
would be stopped by the herein before described guard or fly. A spring may if
found desirable be adapted to the said guard or fly.
In a modification of this arrangement, instead of employing a swivelling guard
or fly I employ a fixed stop attached to the circle plate and extending across the
opening between the meeting rails of the sash.
The end of the fly or stop which rests on the meeting rail of the top sash may
be provided with a projection to take into a corresponding slot in the arm or bar
when the fastening is closed

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Edwin Cope in the Great Seal Patent Office on the 23rd June
1883.
JAMES EDWIN COPE of Birmingham in the county of Warwick "IMPROVEMENTS
IN SASH FASTENERS
"
This invention relates to the improvements hereinafter described in eash
fasteners for sliding sashes the improvements having for object to provide a
simple sash fastener which cannot be opened from the outside by the insertion
of a knife or other like instrument between the meeting rails of the sashes.
In carrying out my invention I employ a sash fastener of the ordinary con-
struction, and to the circle plate I pivot a swivel guard or fly which may work
either inside or outside the circle plate in such a manner that the arm or bar of
the fastening when closed will press against and hold the swivel guard or fly
transversely across the meeting rails of the sash so that if a knife or other similar
instrument were forced between the meeting rails to move the arm, the said knife
if
would be stopped by the herein before described guard or fly. A spring may
found desirable be adapted to the said guard or fly.
In a modification of this arrangement instead of employing a swivelling guard
or fly I employ a fixed stop attached to the circle plate and extending across the
opening between the meeting rails of the sash.
The end of the fly or stop which rests on the meeting rail of the top sash is
sometimes provided with a projection to take into a corresponding slot in the arm
or bar when the fastening is closed.-
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figures 1 and 2
represent plan views and figure 3, a front view of a sash fastener provided with
a swivel guard or fly according to my invention; figures 1, and 3 shewing the sach
fastener open and figure 2 shewing the same closed; figures 4 and 5 are plan views
of the modified arrangement in which a fixed stop is employed. Similar letters in
all the figures represent similar or corresponding parts.
In the sash fastener shewn in figures 1, 2 and 3, a, is the swivel guard or fly
pivotting at b, in the circle plate c, in such a manner that the arın or bar d, of the
fastening when closed will press against and hold the swivel guard or fly a,
transversely across the opening between the meeting rails of the sash in the
position shewn in figure 2; e, is the projection on the fly or guard, the said
projection when the fastener is closed taking into the slotted or cut away part f,
in the arm or bar d, and which arrangement effectually prevents the introduction
of any instrument (from outside the window) between the fly a, and arm d.
I sometimes provide the swivel guard or fly with a suitable spring (not shewn in
the drawing) for causing it to automatically take the longitudinal position (shewn
in figures 1, and 3) when the fastener is opened, but this spring is not absolutely
necessary.
In the modified arrangement shewn in figures 4 and 5, a, is the fixed stop
attached to or formed on the circle plate c, and extending across the opening
between the meeting rails of the sash; e, is the projection on the end of the stop
the said projection taking into the slotted or cut away part f, in the arm or bar d,
when the fastening is closed as shewn in figure 5.
By the arrangements of sash fasteners hereinbefore described it will be evident
that when the fasteners are closed in the positions shewn in figures 2 and 5 the
fly or the stop a, will prevent any person from opening the fastener from the
outside by the insertion of a knife or other like instrument between the meeting

page_text: rails of the sashes and the projection e, will as before mentioned prevent the
instrument being introduced between the fly or the stop a, and the arm or bar d.
I have described and shewn the guard or fly and the fixed stop provided with
a projection for taking into a slot in the arm or bar of the fastener which is the
arrangement I prefer but it will be evident that the said projection and slot may
for the purpose of economy be dispensed with.
Having thus described my said invention and the manner of performing the same
I would have it understood that what I claim is:-
Firstly. The construction and application to sash fasteners of a swivel guard
or fly such as that shewn at a, substantially in the manner and for the purposes
herein before described and represented in figures 1, 2, and 3 of the accompanying
drawing.
Secondly. The modified arrangement herein before described and shewn in figures
4, and 5 in which a fixed stop is employed substantially in the manner and for the
purposes described.
Thirdly. In a sash fastener I claim a swivel guard or a fixed stop (provided or
not with a projection taking into a corresponding slot or recess formed in the arm
or bar of the fastener) substantially as and for the purposes herein before described
and represented in the several figures of the accompanying drawing.
In Witness whereof I the said James Edwin Cope have hereto set my hand
and seal this twenty second day of June in the year of our Lord one
thousand eight hundred and eighty three