Year: 1887

page_text: Date of Application, 25th Jan, 1887.
Specification Accepted, 25th Feb., 1887.
I, WILLIAM ECKSTEIN of 187-193 Union Street Borough, London, S.E., Engineer,
do hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
My improvements relate to ventilators of the kind known as Sheringham's
Ventilators.
The improvements are shown in the drawings hereunto annexed.
Figure 1 is a perspective view of the front of the ventilator. Figure 2 is a vertical
cross section. Figure 3 a front view, and Figure 4 a back view. Figure 5 is a part front
view of the outer case or box with the pivotted front or door removed-and Figure
is a part back view of the door.
The improvements relate to the way of pivotting the door and to the means
employed for drawing the door into its closed or partially closed position-also to the
way of pivotting the weighted plate or flap which bears against the back of the door
and tends to press it outwards into its open position.
A is the door which as heretofore is formed with side wings or quadrants A¹. To
form the pivot or hinge joint upon which the door turns I make these wings or
quadrants to extend downwards a short distance below the bottom of the door as
shewn at A, Figures 2 and 6.
B is the outer box or casing the door A fits into a recess in the front plate of this
box and the opening through this front plate is somewhat smaller than this recess so that
a flange B is left for the back of the door A to abut against. At the two opposite ends
of the bottom of the opening, notches B are cut in the flange as shewn at Figure 5-
the lower part of the wings or quadrants A¹ of the door A drop into these notches and
their downward extensions A2 pass below and at the back of them and so form a
hinge joint for the door.
is the cord by which the door is drawn into its closed or partially closed position
it is fastened to the end of an arm A³ secured to the top of the door A at its centre
in place of being secured to it as heretofore on one side. From the end of the arm it

page_text: is led over a pulley D, this pulley is carried by a bracket piece D¹ which drops into a
recess in the centre of the upper part of the front plate of the box B and which is
secured into this recess by a rivet."
Afterwards the cord is led over a second or leading pulley E carried by a
bracket E which is secured to the wall on whichever side of the box B it may be
convenient to place it, whereas heretofore by the old construction the ventilators were
made right and left handed that is some ventilators were made so that the cord passed
downwards from them on the right hand side only of the box or casing and other's so
that the cord passed downwards from them on the left hand side only. The lower
end of the cord has a small weight attached to it to counterbalance the weight of the
door and to hold it closed or partially open in the usual way.
Fis the weighted plate or sliding flap which bears against the back of the door A.
The hinge joint upon which it turns is formed by a curved lug G projecting up from
the bottom of the casing or box B and passing through a slot in the plate or flap near
its lower edge.
By constructing the ventilator in the above manner the paris of which it is
composed when cast go together with comparatively little fitting being requisite all
that has to be done is to drill three holes into the castings and to rivet to them the
lug G, the pulley bracket D! and the arm A³.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-.
1. A ventilator constructed substantially as hereinbefore described and shewn in
the drawings annexed.
2. Hinging the door to the box or casing in the manner described.
3. Making the ventilators to bo right or left handed at pleasure by providing means
for allowing the cord to be led away and down either on the right hand or the left
substantially as described.
4. Hinging the weighted plate or sliding flap F to the casing in the manner
described.
CARPMAEL & Co.,
Agents for the Applicant.