AN, IMPROVED DOUBLE BALANCED BOLT OR FASTENING FOR WINDOWS, SHUTTERS, FOLDING DOORS, AND OTHER LIKE PURPOSES
Year: 1871

page_text: 3
LETTERS PATENT to Pierre Lecloux, of Dijon, in the Department of
the Côte d'Or, in the French Republic, Locksmith, for the
Invention of "AN, IMPROVED DOUBLE BALANCED BOLT OR FASTENING FOR
WINDOWS, SHUTTERS, FOLDING DOORS, AND OTHER LIKE PURPOSES."
Sealed the 19th April 1872, and dated the 24th October 1871.
PROVISIONAL SPECIFICATION left by the said Pierre Lecloux at the
Office of the Commissioners of Patents, with his Petition, on the
24th October 1871.
ر
I, PIERRE LECLOUX, of Dijon, in the Department of the Côte d'Or, in
the French Republic, Locksmith, do hereby declare the nature of the
said Invention for "AN IMPROVED DOUBLE BALANCED BOLT OR FASTENING FOR
WINDOWS, SHUTTERS, FOLDING DOORS, AND OTHER LIKE PURPOSES," to be as
follows:-
This apparatus is composed,―
Firstly, of a small chain formed of double and single links, superposed
two and two, and joined by rivets, so as to be moveable around the points
of union, and that the chain may extend or shorten and give a journey:

page_text: to and fro. The said chain is fixed to the folding door or window or
other article by means of a screw or bolt set in a plate placed in the
centre of the middle link of the chain.
Secondly, of two rods placed at opposite extremities of the chain and
acting as bolts. This system is applicable to the fastening of folding
doors, windows, jalousies, shutters, and other like purposes.
Various methods of working this apparatus are illustrated, Figs. 1 to
6 of the accompanying Sheet of Drawing, upon which A indicates the
chain; B, upper bolt; B¹, lower bolt; C, levers and buttons for actuating
lower bolt; D, pivoting lever connecting two apparatuses to be actuated
by lever C or knob E; f, plate for fixing chain to folding door, window,
or other object; g, guides for bolts B and B'.
Fig. 1 shows the chain A closed, and bolts B, B¹, drawn to open door
or window. Lowering the lever C moves the bolt B₁ downwards,
extending the chain A as at Fig. 2, and pushing the bolt B upward,
so that the door or window is at once fastened top and bottom, by
reversing the movement the bolts are at once withdrawn. A pin or
lever C, Fig. 3, works in a slotted piece attached to a spring and carried
by the bolt B¹, the effect being that the spring draws down the bolt B¹
directly the handle C is moved from the perpendicular.
Fig. 4 shows a double apparatus worked by knob E or lever C. The
pivoting lever D is connected with one lower and one upper bolt, so
that on pulling down the lever C the lever D pushes up the top bolt
with which it is connected, or by pulling down the knob E the lever D
will lower the bottom bolt to which it is fastened.
The arrangement shown, Fig. 5, is opened and closed by pulling the
rod B¹ up and down by means of the knob C, and that Fig. 6 by
turning the handle C to the left for fastening, and to the right for
unfastening the two bolts. The number of links is not limited, and
will vary according to circumstances, they may be made of any
suitable metal or material. The rivets uniting the links may have
projecting heads, or be countersunk in the link, as may be preferred.
The length of the four half links placed at the end of the chain may
vary.
It should be observed that the two rods or bolts fixed to the end of
the chain should be of the same weight, so as to balance each other
when the arrangement is placed perpendicularly, by making the lower
rod longer than the upper one it will also act as a spring.

page_text: The apparatus is actuated, as shown, either by a knob, or a handle,
or lever placed on one of the rods or bolts. It may also be actuated
by the aid of a lock and key; in this case the movement will be very
easy, the rods balancing each other.
This system will be very useful as draw bolt for a falling latch, for
Venetian shutters it will advantageously replace the espagnolette, which
is very expensive, and twice as thick as my apparatus, and by the aid
of a cap my apparatus may be fixed on edge upon any narrow part, and
act as well as if placed flat. The saving of expense as compared with
the "espagnolette" will be found very great. This fastening will not
be liable to the defects of all ordinary bolt fastenings when allowed to
get rusty, namely, overshooting, this defect being avoided by the equipoise
of the movement.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Pierre Lecloux in the Great Seal Patent Office on
the 22nd April 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PIERRE
LECLOUX, of Dijon, in the Department of the Côte d'Or, in the French
Republic, Locksmith, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of October, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Pierre Lecloux, Her special licence
that I, the said Pierre Lecloux, my executors, administrators, and
assigns, or such others as I, the said Pierre Lecloux, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time to time and 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 "AN IMPROVED
DOUBLE BALANCED BOLT OR FASTENING FOR WINDOWS, SHUTTERS, FOLDING DOORS,
AND OTHER LIKE PURPOSES," upon the condition (amongst others) that I,
the said Pierre Lecloux, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Inven-
tion, and in what manner the same was to be performed, and cause the

page_text: 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 Pierre Lecloux, 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 :-
My improved apparatus is composed,―
Firstly, of a small chain or lazy-tongs formed of double and single
links or toggle levers, superposed two and two, and joined by rivets, so as
to be moveable around the points of union and that the chain may extend
or shorten, and give a journey to and fro. The said chain is fixed to the
folding door, or window, or other article by means of a screw or bolt set
in a plate placed in the centre of the middle link of the chain or lazy-
tongs.
Secondly, of two rods placed at opposite extremities of the chain, and
acting as bolts. This system is applicable to the fastening of folding
doors, windows, jalousies, shutters, and other like purposes.
Various methods of working my apparatus are illustrated, Figures 1
to 6 of the accompanying Sheet of Drawing, upon which A indicates the
chain or lazy-tongs; B, upper bolt; B¹, lower bolt; C, levers and
buttons for actuating lower bolt; D, pivoting lever connecting two
apparatuses to be actuated by lever C or knob E; f, plate for fixing
chain to folding door, window, or other object; 9, guides for bolts B
and B¹.
Figure 1 shows the chain A closed and bolts B, B', drawn to open
door or window. Lowering the lever C moves the bolt B¹ downwards
extending the chain A as at Fig. 2, and pushing the bolt B upward so
that the door or window is at once fastened top and bottom, by reversing
the movement the bolts are at once withdrawn. A pin on the lever C
Fig. 3, works in a slotted piece attached to a spring and carried by the
bolt B¹, the effect being that the spring draws down bolt B¹ directly the
handle C is moved from the perpendicular.
Figure 4 shows a double apparatus worked by knob E or lever C.
The pivoting lever D is connected with one lower and one upper bolt,
so that on pulling down the lever C the lever D pushes up the top bolt
with which it is connected, or by pulling down the knob E the lever D
will lower the bottom bolt to which it is fastened.

page_text: The arrangement shown Fig. 5 is opened and closed by pulling the
rod B¹ up and down by means of the knob C, and that Fig. 6 by turning
the handle C to the left for fastening, and to the right for unfastening
the two bolts. The number of links or toggle levers is not limited and
will vary according to circumstances, they may be made of any suitable
metal or material. The rivets uniting the links may have projecting
heads or be countersunk in the link as may be preferred. The length of
the four half links placed at the end of the chain may vary. It should
be observed that the two rods or bolts fixed to the end of the chain
should be of the same weight so as to balance each other when the
arrangement is placed perpendicularly, by making the lower rod longer
than the upper one it will act as a spring.
The apparatus is actuated as shown either by a knob, or a handle, or
lever placed on one of the rods or bolts. It may also be actuated by the
aid of a lock and key, in this case the movement will be very easy, the
rods balancing each other. This system will be very useful as draw bolt
for a falling latch, for Venetian shutters it will advantageously replace the
espagnolette, which is very expensive and twice as thick as my apparatus,
and by the aid of a cap my apparatus may be fixed on edge upon any
narrow part and act as well as if placed flat. The saving of expense
as compared with the “ espagnolette" will be found very great. This
fastening will not be liable to the defect of all ordinary bolt fastenings
when allowed to get rusty, namely, overshooting, this defect being
avoided by the equipoise of the movement.
Having now described and ascertained the nature of my said Invention
and in what manner the same is to be performed, I desire it to be under-
stood that I claim, the use of the double toggle lever and lazy-tongs
when the central link is centrally pivoted and used for operating a doublo
bolt substantially as herein-before set forth and illustrated on the accom-
panying Sheet of Drawing.
In witness whereof, I, the said Pierre Lecloux, have hereunto set
my hand and seal, this Fifteenth day of April, in the year of our
Lord One thousand eight hundred and seventy-two.