IMPROVEMENTS IN FASTENINGS SUITABLE FOR WINDOW SASHES AND FOR OTHER USES
Year: 1868

page_text: LETTERS PATENT to Nathan Ager, of 28, Grosvenor Road, Pimlico,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
FASTENINGS SUITABLE FOR WINDOW SASHES AND FOR OTHER USES."
Sealed the 17th October 1868, and dated the 18th April 1868.
PROVISIONAL SPECIFICATION left by the said Nathan Ager at the
Office of the Commissioners of Patents, with his Petition, on the
18th April 1868.
I, NATHAN AGER, of 28, Grosvenor Road, Pimlico, in the County
of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN FASTENINGS SUITABLE FOR WINDOW SASHES AND FOR OTHER
USES," to be as follows:-
This Invention has for its object improvements in fastenings suitable
for window sashes and for other uses. The ordinary window sash
fastening consisting of a short arm or turn button with a knob or
handle upon it turning about a pin secured to one of the sashes, and
securing this sash to the other sash by entering beneath a curved lug
fixed thereto, is open to the objection that the arm or turn button

page_text: can be pushed back from the outside of the window so as to unfasten
the sashes by means of a knife inserted between the sashes, and this
fastening is also open to the objection that it fails effectually to draw
the sashes together, and so allows them to rattle with the wind.
To obviate these objections I modify the construction and arrangement
of the arm or turn button and of the lug in the following manner:-
The lug in place of being rigidly fixed to the plate on which it is
mounted is arranged to turn thereon on the stud which secures it to
the plate, and it is provided with a spring which constantly tends to
force its free end inwards or away from the other part of the fastening
as far as a stop permits. A notch also is formed in the edge of the
lug near the stud about which it turns. The arm or turn button has
a.stump upon it, and in moving the arm or turn button round its centre
in securing the sashes this stump acting on the curved edge of the
lug presses it outwards or towards the other sash overcoming the spring
until at the end of the motion the stump comes up to the notch formed
in the edge of the lug as already explained; the spring then causes the
return of the lug, and the stump on the arm or turn button is then
caught in the notch, and the arm or turn button cannot be pushed back
by any force which can be applied to it except such force be applied
by means of its knob or handle, which is not fixed directly to the arm
or turn button but upon a small lever turning on a pin fixed thereto.
This lever at one end has the knob or handle upon it, and at the other
a small friction pulley resting on the edge of the lug. The lever stands
in an inclined position as respects the arm or turn button, so that in
unlocking the fastening when the knob or handle is pressed upon the
first action is to bring the lever more nearly parallel to the arm or turn
button, and by this movement the friction pulley on the lever is caused
to press on the lug and to push it back or outwards; thus the stump on
the arm or turn button is freed from the notch in the lug and the arm
or turn button is then at liberty, and the continued pressure on the
knob or handle causes it to turn in the usual way.
It will be seen that the spring applied to the lug being fitted so as
to have sufficient play tends to draw the sashes close together and to
prevent rattling.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Nathan Ager in the Great Seal Patent Office on
the 17th October 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NATHAN
AGER, of 28, Grosvenor Road, Pimlico, in the County of Middlesex,
send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of April, in the year
of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Nathan Ager, Her
special licence that I, the said Nathan Ager, my executors, adminis-
trators, and assigns, or such others as I, the said Nathan Ager, my
exccutors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN FASTENINGS SUITABLE FOR WINDOW SASHES AND FOR OTHER
USES," upon the condition (amongst others) that I, the said Nathan
Ager, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Nathan Ager, do hereby declare
the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained.in.and by
the following statement thereof, that is to say :-
This Invention has for its object improvements in fastenings suitable
for window sashes and for other uses. The ordinary window sash
fastening consisting of a short arm or turn button with a knob or
handle upon it turning about a pin secured to one of the sashes, and
securing this sash to the other sash by entering beneath a curved lug

page_text: fixed thereto is open to the objection that the arm or turn button can
be pushed back from the outside of the window, so as to unfasten
the sashes by means of a knife inserted between the sashes, and this
fastening is also open to the objection that it fails effectually to draw
the sashes together, and so allows them to rattle with the wind.
To obviate these objections I modify the construction and arrange-
ment of the arm or turn button and of the lug in the following
manner: The lug in place of being rigidly fixed to the plate on which
it is mounted is arranged to turn thereon on the stud which secures
it to the plate, and it is provided with a spring which constantly tends
to force its free end inwards or away from the other part of the fastening
as far as a stop permits. A notch also is formed in the edge of the lug
near the stud about which it turns. The arm or turn button has a
stump upon it, and in moving the arm or turn button round its centre
in securing the sashes this stump acting on the curved edge of the
lug presses it outwards or towards the other sash, overcoming the
spring, until at the end of the motion the stump comes up to the notch
formed in the edge of the lug, as already explained; the spring then
causes the return of the lug, and the stump on the arm or turn button
is then caught in the notch, and the arm or turn button cannot be
pushed back by any force which can be applied to it, except such
force be applied by means of its knob or handle, which is not fixed
directly to the arm or turn button but upon a small lever turning
on a pin fixed thereto. This lever at one end has the knob or handle
upon it, and at the other it rests on the edge of the lug, or it may
carry a small friction pully to make it work more easily. The lever
stands in an inclined position as respects the arm or turn button, so
that in unlocking the fastening when the knob or handle is pressed
upon, the first action is to bring the lever more nearly parallel to the
arm or turn button, and by this movement its end or the friction pulley
it carries is caused to press on the lug, and to push it back or out-
wards; thus the stump on the arm or turn button is freed from the
notch in the lug and the arm or turn button is then at liberty, and
the continued pressure on the knob or handle causes it to turn in the
usual way.
It will be seen that the spring applied to the lug being fitted so as
to have sufficient play tends to draw the sashes close together and to

page_text: and reauny carried into elect, I win proceed to describe the Drawings
hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of a fastening constructed according to my
Invention as the fastening appears when open; Figure 2 is a plan of
the same fastening closed; Figure 3 is a similar view of the parts in
the position which they assume in opening; Figure 4 is a side view
of the fastening, the sashes or other frames which it connects being
shewn in section.
a, a, are the sashes or frames; 6 is a plate having a turn button c
mounted upon it, and furnished with a spring in the usual way; but
in place of having a knob or handle at its outer end it has a stud c¹
on which a lever & turns, and also another stud c³. This plate band
the parts in connection with it is as is shown fixed to one of the sashes
or frames which are to be held together; e is another plate fixed to
the other of the sashes or frames; it carries a curved lug f, but this
is not fixed to it as in ordinary window fastenings, but is mounted upon
a centre, and a spring f' is applied to it in such manner as to press
its free end inwards or away from the other part of the fastening until
it is stopped by a portion of the lug coming against a stud e¹ on the
plate e f is a notch which is formed in the lug. The outer end of
the lever d serves as a thumb piece or handle by which the turn
button c is moved. In closing the fastening the lever d turns until
the nib & upon it rests against the stud c³, and then the turn button
and lever move together as if in one piece. The stud c* comes against
the convex surface of the lug f, which yields to it by the play of its
spring until the stud c³ comes opposite to the notch f³, and the spring
then immediately causes the lug to return, and the stud c³ is caught
in the notch fin such manner that no pressure applied directly on
the turn button c can move it, but by pressing upon the thumb piece
of the lever d it is caused to move upon its pivot c¹ in such manner
that the nib d upon the lever (which may if desired carry a friction
pulley) is brought to bear upon the convex surface of the lug f, and it
3 forces it back, overcoming the spring fs, and frees the stud c; the
nib then comes to bear against the stud cs, and then in pushing
back the turn button it moves with the lever d as if in one piece
with it.

page_text: Having thus described the nature of my said Invention, and the
manner of performing the same, I would have it understood that I claim,
the constructing fastenings suitable for window sashes, and for other
uses substantially as above described.
I also claim the constructing fastenings suitable for windows and for 5
other uses with a lug mounted on a centre, and furnished with a spring,
such lug also having a notch upon it, and being arranged to work
with a turn button having a stud upon it as described.
In witness whercof, I, the said Nathan Ager, have hereunto set
my hand and seal, this Seventeenth day of October, in the 1
year of our Lord One thousand eight hundred and sixty-
eight.