IMPROVEMENTS IN VENTILATORS
Year: 1852

page_text: LETTERS PATENT to Joseph Robinson, of Southampton, in the
County of Hants. Superintendent Joiner to the Peninsular and
Oriental Steam Company, for the Invention of "IMPROVEMENTS IN
VENTILATORS."
Sealed the 16th March 1853, and dated the 12th October 1852.
PROVISIONAL SPECIFICATION left by the said Joseph Robinson
at the Office of the Commissioners of Patents, with his Petition,
on the 12th October 1852.
I, JOSEPHI ROBINSON, of Southampton, in the County of Hants,
Superintendent Joiner to the Peninsular and Oriental Steam Com-
pany, do hereby declare the nature of the said Invention for "Iм-
PROVEMENTS IN VENTILATORS" to be as follows:-
My improvements in ventilators consist in using two sets of louvre
boards fitted in a frame, and so arranged that one set shall remain
stationary while the other can be moved at pleasure. The object being
to admit air without allowing a person from the outside seeing into the
apartment or chamber where the ventilator is fitted, and at the same
time to regulate the air admitted.
In the annexed Figures A, A, are the external louvre boards. and
B, B, the internal boards, which can be moved to or fro' so as to
regulate the ventilation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Robinson in the Great Seal Patent Office,
on the 12th April 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JOSEPH ROBINSON, of Southampton, in the County of Hants, Super-
intendent .Joiner to the Peninsular and Oriental Steam Company, send
greeting.
WHEREAS Пler most Excellent Majesty Queen Victoria, by ler
Letters Patent, bearing date the Twelfth day of October, in the year of
our Lord One thousand eight hundred and fifty-two, in the sixteenth
year of fler reign, did. for Ierself, Her heirs and successors, give and
grant unto me, the said Joseph Robinson, Her special licence that I,
the said Joseph Robinson, my executors, administrators, and assigns,
or such others as 1, the said Joseph Robinson, my executors, adminis-
trators, 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 Chamel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN VENTI-
LATORS," upon the condition (amongst others) that I, the said Joseph
Robinson, by an instrument in writing under my hand and seal, 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 Joseph Robinson, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, reference being had to the Draw-
ings hereunto annexed, that is to say!
My Invention consists in mounting two sets of louvre boards in a
frame in such manner that one set shall remain stationery while the

page_text: other is free to slide to and fro at the back of the fixed set. The
object being to admit air without allowing a person from without
secing into the apartment or chamber where the ventilator is fitter,
and at the same time to regulate the air admitted. The Drawings
hereunto annexed represent my improved ventilator. Figure 1, being
a front elevation; Figure 2, a vertical section of Figure 1; Figure 3, a
horizontal section showing the ventilator opeu; and Figure 4, a similar
section, shewing it closed. A, A, is a rectangular frame divided across
the centre by the bar B. C, C, are a series of louvre boards fixed
permanently to the frame A, and bar B. D, D', are two other sets of
louvres fixed in frames E, E, independant of the frane A, and are free
to slide backwards and forwards at the back of the louvres C, C, and
kept against them by the strips of metal e, e, screwed to the frame-
work A, and bar 13. These frames E, E, with their louvres, are also
independant of each other, so that one half of the ventilator can be
closed or partially closed at pleasure so as to regulate the quantity of
air admitted into the apartment. The sets of louvre boards are arranged
in the manuer shewn in the Figures, and the breadth of cach louvre
board is greater than the spaces between any two of them, so that
when the ventilator is closed they form a good lap joint and prevent
draught. The frames D, D', with their louvres, are caused to slide
backwards or forwards behind the louvres C, by means of the pinions
a, a, which gear into the teeth of the racks b, b, attached to the frames
E, E. The pinions are worked by the knobs c, c, upon their spindles.
And having now described the nature of my said Invention, and the
nanner in which the same is to be performed, I declare that I claim,-
The construction of ventilators consisting of two sets of louvre boards,
one set being made to slide at the back of the other, as herein-before
described and represented in the Drawings hereunto annexed.
In witness whereof, I, the said Joseph Robinson, have hereunto
set my hand and seal, this Twelfth day of April, One thousand
eight hundred and fifty-three.