IMPROVEMENTS IN LIFE PRESERVERS AND IN VALVES FOR REGULATING THE SAME, OR OTHER PURPOSES
Year: 1871

page_text: LETTERS PATENT to John Macintosh, of North Bank, Regent's Park,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
LIFE PRESERVERS AND IN VALVES FOR REGULATING THE SAME, OR OTHER
PURPOSES."
Sealed the 28th July 1871, and dated the 30th January 1871.
PROVISIONAL SPECIFICATION left by the said John Macintosh at
the Office of the Commissioners of Patents, with his Petition, on
the 30th January 1871.
I, JOHN MACINTOSH, of North Bank, Regent's Park, in the County
of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN LIFE PRESERVERS AND IN VALVES FOR REGULATING THE SAME,
OR OTHER PURPOSES," to be as follows:-
:―
My Invention consists in employing a tube made of india-rubber or
its compounds, vulcanised and formed circular so as to slip easily over
the head. This tube is furnished with a small tube with holes made
round it, which is covered with another tube which opens and shuts the
valves, so that by blowing through the small tube into the circular
larger one it will expand by the pressure of air forming a perfect fit
round the neck.
The tube may be protected by tubular, knitted, or other fabrics, or it
may be inserted into garments.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Macintosh in the Great Seal Patent Office on
the 29th July 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACINTOSH, of North Bank, Regent's Park, in the County of Middlesex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of January, in the
year of our Lord One thousand eight hundred and seventy-one, in tho
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Macintosh, Her special
licence that I, the said John Macintosh, my executors, administrators,
and assigns, or such others as I, the said John Macintosh, my executors,
administrators, 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
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
LIFE PRESERVERS AND IN VALVES FOR REGULATING THE SAME, OR OTHER
PURPOSES," upon the condition (amongst others) that I, the said John
Macintosh, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, 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 John Macintosh, 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, that is to say:-
My Invention as applied to life preservers consists in employing a
tube made of india-rubber or its compounds, vulcanized and formed
so as to slip easily over the head of the user. This tube is furnished
with a smaller tube perforated with holes made round it, which is
covered with another tube which opens and closes the openings or
valves, so that by blowing through the small tube into the large one

page_text: it will expand by the pressure of air, thus forming a perfect fit round
the neck.
The tube may be protected by tubular, knitted, or other fabrics, or it.
may be attached to or inserted into garments.
In making life preservers in accordance with my Invention I take a
tube of india-rubber or its compounds and dip it into a solution of
bisulphide of carbon and chloride of sulphur. The tube is distended
to the extent required.
In constructing valves in accordance with one part of my Invention
I employ a tube of vulcanized india-rubber or its compounds closed at
the end, and perforated with holes round its circumference which act as
the valves, and through which the larger tube or other vessel or chamber
is inflated or filled. Upon this small tube I apply a piece of larger
tubing which fits round it and is moved or passed over the valves or
openings when required for closing them, or I take a small piece of
vulcanized india-rubber piping open at the end, and over it I apply a
larger piece of piping. When it is desired to fill the life preserver or
other vessel or chamber the air is introduced by blowing or otherwise at
the end of the smaller pipe or tube, and when it is desired to close the
tube it is doubled over and the end is inserted into the larger tube or
pipe which effectually confines the air.
These improved valves are applicable to vessels of every description
containing liquids or fluids, with the exception of those which act as
solvents to india-rubber.
In witness whereof, I, the said John Macintosh, have hereunto
set my hand and seal, this Twenty-ninth day of July in the
year of our Lord One thousand eight hundred and seventy-one.
Witness,
J. G. TONGUE,
Patent Agent,
JOHN MACINTOSH. (L.s.)
34, Southampton Buildings,
Chancery Lane,
W.C.