IMPROVEMENTS IN VENTILATORS
Year: 1881

page_text: LETTERS PATENT to James Edward Ellison and Henry Fourness, both of
Leeds, in the County of York, for an Invention of "IMPROVEMENTS IN
VENTILATORS."
PROVISIONAL SPECIFICATION left by the said James Edward Ellison
and Henry Fourness at the Office of the Commissioners of Patents on the
24th May 1881.
JAMES EDWARD ELLISON and HENRY FOURNESS, both of Leeds, in the County
of York. "IMPROVEMENTS IN VENTILATORS."
The object of this Invention is to admit air into buildings, carriages, and other
structures in such a manner as to effectually disperse it, and to readily admit of
the closing of the ventilator when desired.
This object is attained by forming on the back of a plate of metal or other
substance vanes or divisions placed crossways or radiating from the centre, which
divisions slide in the corners of an angular box let into the wall, door, partition, or
window for that purpose.
Where more convenient the centre of the divisions may be cut away, or rods
may be fixed on the back of the front plate, so arranged as to slide or fit in the
corners or grooves of the box.
The top divisions or rods are notched or turned up at the ends in order to catch
against a bar placed at the top of the box to prevent the valve from being drawn
straight out, or otherwise suitable stops are provided.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Edward Ellison and Henry Fourness in the Great Seal
Patent Office on the 23rd November 1881.
JAMES EDWARD ELLISON, and HENRY FOURNESS, both of Leeds, in the County
of York. "IMPROVEMENTS IN VENTILATORS."
The object of.this Invention is to admit air into buildings, carriages, and other
structures in such a manner as to effectually disperse it, and so prevent draught,
and to readily admit of the closing of the ventilator when desired.
This object is attained by forming on the back of a plate of wood, metal, glass,
or other substance vanes or divisions placed crossways or radiating from the
centre, which divisions slide in the corners of an angular box let into the wall,
door, partition, or window for that purpose.
Where more convenient the centre of the divisions may be cut away, or rods
may be fixed on the back of the front-plate, so arranged as to slide or fit in the
corners or grooves of the box.
Suitable stops are provided to prevent the front part from being drawn straight out.
The Drawing annexed shews a ventilator constructed according to our Invention.
Figure 1 is a vertical section of the ventilator; Figure 2 a front view; and
Figure 3 a back view.
A is the box to be fixed into an opening in the wall; if the wall is an outer
wall an earthenware or other grating may be fixed in rear of it, as shewn at
Figure 1 of the Drawings, and fresh air may be allowed to enter through it
directly into the back end of the box; in other cases the fresh air may be conveyed
by means of air channels or shafts to the ventilators wherever they may be fixed;
B is the front plate of any desired shape, and either plain or ornamented in any
suitable manner; C are the radial divisions fixed to the back of the plate B, and
with their edges fitting into the corners of the box A.
The front plate B of the ventilator may have a handle on the front for drawing
it forwards to admit air into the room or to push it backwards, so that it shall
close the front end of the box A and shut off the inlet of fresh air to the room.
D is a readily removable stop for preventing the plate B. and divisions C from
being drawn out entirely away from the box A. Pins E fixed to the rear ends
of two of the divisions C come against this stop. The stop D is fixed to the
bottom of the box A in such a manner that it can readily be removed or turned
aside when the ventilator is partly open.
A ventilator formed in the manner above described is suitable for fixing at any
desired height, though from 4 feet to 8 feet will be found most effectual. Á
position between the windows is often a convenient position, free from obstruction
for about 1 foot on every side.
Having thus described the nature of our Invention and the manner of performing
the same, we wish it to be understood that we do not confine ourselves to the
exact details shewn in the Drawing annexed, as the same may be varied according
to circumstances, but what we claim is,―
The construction of ventilators, substantially in the manner herein before
described.
In witness whereof, I, the said James Edward Ellison, have hereunto set my
hand and seal, this Twelfth day of November, in the year of our Lord
One thousand sight hundsad and night..
JAS. EP. ELLISON. (L.S.)