IMPROVEMENTS IN HINGES FOR FRENCH CASEMENTS
Year: 1862

page_text: LETTERS PATENT to William Lea, of the Firm of W. and J. Lea, of
Wolverhampton, in the County of Stafford, Manufacturers, for the
Invention of IMPROVEMENTS IN HINGES FOR FRENCH CASEMENTS."
Sealed the 20th March 1863, and dated the 25th September 1862.
PROVISIONAL SPECIFICATION left by the said William Lea at the
Office of the Commissioners of Patents, with his Petition, on the 25th
September 1862.
I, WILLIAM LEA, of the Firm of W. and J. Lea, of Wolverhampton, in the
County of Stafford, Manufacturers, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN HINGES FOR FRENCH CASEMENTS," to be as
follows:-
The object of my Invention is to enable French casements to be held open
at any extent required for the admission of air or otherwise.
My Invention consists in securing to the back of one flap of the hinge by
means of a pin one end of a quadrant carried through an aperture in the flap
itself; the other end of the quadrant passes through another aperture in the
other flap of the hinge. At the back of the second flap, free to move on a pin,
I fit a rod or lever which projects beyond the flap, and which is armed with a
tongue or catch. Notches or holes are made in the quadrant, and on bringing
down the lever so as to engage the catch into one or other of the notches or
holes the casement is retained open to the extent allowed by the particular
notch or hole engaged until the catch is released. Instead of notches I some-
times form holes in the quadrant, and cause a screw or spring stud fitted to the
second hinge flap to engage into one or other of the holes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Lea in the Great Seal Patent Office on the
25th March 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
LEA, of the Firm of W. and J. Lea, of Wolverhampton, in the County of
Stafford, Manufacturers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of September, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Willliam Lea, Her special licence that I, the said William
Lea, my executors, administrators, and assigns, or such others as I, the
said William Lea, my executors, 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 "Ix-
PROVEMENTS IN HINGES FOR FRENCH CASEMENTS," upon the condition (amongst
others) that I, the said William Lea, 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 William Lea, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following.
statement thereof, reference being had to the Drawings hereunto annexed,
that is to say::-
The object of my Invention is to enable French casements to be held open
at any extent required for the admission of air or otherwise.
My Invention consists in securing to the back of one flap of the hinge bý
means of a pin one end of a quadrant carried through an aperture in the flap
itself; the other end of the quadrant passes through another aperture in the
other flap of the hinge. At the back of the second flap, free to move on a
pin, I fit a red or lever which projects beyond the flap, and which is armed
with a tongue or catch. Notches or holes are made in the quadrant, and on
bringing down the lever so as to engage the catch into one or other of the

page_text: notches or holes the casement is retained open to the extent allowed by the
particular notch or hole engaged until the catch is released.
Figure 1 of the accompanying Drawings is a perspective view of a hinge
constructed according to this Invention, and applicable for a casement opening
inwards, and Figure 2 is a back view of one of the flaps, showing the rod or
lever which retains the quadrant in the required position.
a, a', are the two flaps of the hinge; b is the quadrant secured by a pin to
the back of the flap a, and passing through the aperture c in the flap; the
other end of the quadrant passes through the aperture c¹ in the other flap a'.
At the back of the flap a' I fit a rod or lever d, free to move on the pin e;
this lever d projects beyond the flap, and is armed with a tongue or catch f.
On bringing down the lever the tongue or catch f engages into one or other of
the notches g in the quadrant, and the casement is thus retained open to the
extent allowed by the particular notch engaged. Instead of notches I some-
times form holes in the quadrant, and cause a screw or spring stud fitted to the
second hinge flap to engage into one or other of the holes.
Figure 3 is a front view, and Figure 4 a top view, of a hinge applicable to
casements opening outwards, and fitted with a screw for engaging into holes in
the quadrant.
a, a', are the two flaps of the hinge, and 6 the quadrant, as before; c is a
screw passing through a tapped lump d, and, taking into holes e, e, in the
quadrant. According to the hole into which the screw c takes, the casement
is retained open to a greater or lesser extent.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim constructing
hinges for French casements substantially in manner and for the purpose
herein-before described.
In witness whereof, I, the said William Lea, have hereunto set my
hand and seal, this Twenty-fourth day of March, One thousand eight
hundred and sixty-three.
WILLIAM LEA. (L.S.)