AN. IMPROVED MOVABLE STOP FOR FASTENING FOLDING-DOORS
Year: 1879

page_text: LETTERS PATENT to Amand Mèritte, of Rouen, Department of the Seine
Inférieure, in the Republic of France, Mechanician, for the Invention of "AN.
IMPROVED MOVABLE STOP FOR FASTENING FOLDING-DOORS."
Scaled the 27th January 1879, and dated the 30th July 1879.
PROVISIONAL SPECIFICATION left by the said Amand Mèritte at the Office
of the Commissioners of Patents on the 30th July 1879.
AMAND MÉRITTE, of Rouen, Department of the Seine Inférieure, in the Republic
of France, Mechanician. "AN IMPROVED MOVABLE STOP FOR FASTENING FOLDING-
DOORS."
The stop piece for folding doors or gates, which prevents the leaf carrying the
fastening bolt from passing beyond its closing line, is ofton a cause of accidents by
reason of its elevation above the surface of the ground or floor. This stop piece
being exactly in the middle of the passage persons passing through the door way are
very apt to strike against it, and receive serious injury.
In order to remedy this defect I make this stop piece moveable, so that it will
lower to the level of the ground or floor when the leaf carrying the bolt is opened,
and rise again when the said leaf is closed.
In order that this improvement may be fully understood I will proceed to describe
it by reference to the accompanying Sheet of Drawings, upon which
Figure 1 represents a side view of my arrangement, and
Figure 2 a horizontal plan of same.
Similar letters indicating similar parts in each of the Figures respectively.
A indicates a plate fixed level with the ground or floor, and carrying the entire
arrangement.
B, moveable stop piece passing through the plate A, and stopping the two leaves
of the folding door or gate at the closing line. This stop piece is seated saddle wise
upon a cranked rocking lever C, where it is held by a pin c.
C, cranked rocking lever axled upon the axle-d-in the bracket D, of one-piece.
with the plate A. This rocking lever has at its part a plate of the shape of the
opening made in this plate for the passage of the fastening bolt.
E, treadle or pedal coming level with the plate A at its part E¹ by an opening
made for this purpose, the function of which is to uplift the stop piece B sufficiently

page_text: to stop the leaf of the door at the moment of its closing. This pedal is supported
by the small bracket F by means of the pin or axle f
G, part of the leaf of the door level with the ground.
H, fastening bolt entering the opening of the plate A, and serving to secure the
leaf of the door interiorly.
WORKING OF THIS ARRANGEMENT.
The stop B and the lever C, occupying the position shown on the Drawing. In
closing the leaf.G a slight pressure is given with the point of the foot upon the end
E' of the pedal E, which by its other end uplifts the stop B, which comes sufficiently
above the level of the plate A.to stop the door at the line for fastening. By entering
the fastening bolt H into the plate A the end h of the bolt meets the part C¹ of the
rocking lever C, and causes, the stop. B to rise to its full height while keeping it in
the position shown, Figure 1: By the aid of this arrangement in opening the door
the bolt H is uplifted, releasing the cranked lever C, and permitting it to resume the
position shown on the Drawing, by the effect of the weight of the stop piece B,
which, being no longer held by the fastening bolt, comes down again to the level of
the surface of the plate A, which presents a perfectly even surface without any kind
of Opening.

page_text: 101 ARRANGERENT
The stop B and the lever C, occupying the position shown on the plan. In
closing the leaf G a slight pressure is given with the point of the foot upon the end
E of the pedal E, which by its other end then uplifts the stop B, which comes
sufficiently above the level of the plate A to stop the door at the line for fastening.
By entering the fastening bolt H into the plate A the end h of the bolt meets the
part C of the rocking lever C, and causes the stop B to rise to its full height while
keeping it in the position shown, Fig. 1.
By the aid of this arrangement in opening the door the bolt H is uplifted, releasing
the cranked lever C, and permitting it to resume the position shown on the Drawing,
by the effect of the weight of the stop-piece B, which, being no longer held by the
fastening bolt, comes down again to the level of the surface of the plate A, which
presents a perfectly even surface without any kind of opening..
-Having now described and ascertained the nature of my said Invention, and. in
what manner the same is or may be performed,
I claim, as secured to me by the hereinbefore in part recited Letters Patent,

page_text: The use of the movable stop for fastening folding-doors, disappearing in the
ground or floor, substantially as hereinbefore described, whereby a free passage is
left, and the accidents arising from the use of fixed stop-pieces are avoided.
In witness whereof, I, the said Amand Méritte, have hereunto set my hand
and seal, this Twenty first day of January, in the year of our Lord One
thousand eight hundred and eighty.
AMAND MERITTE
(L.S.)