AN IMPROVED COMPOUND BLOWER.
Year: 1873

page_text: LETTERS PATENT to Henry Woodcroft Hammond, of 27, Southampton
Buildings, Chancery Lane, in the County of Middlesex, Civil
Engineer, for the Invention of "AN IMPROVED COMPOUND BLOWER.".
A communication from abroad by Philip Syng Justice, of the City
and County of Philadelphia, in the State of Pennsylvania, United-
States of America.
PROVISIONAL SPECIFICATION left by the said Henry Woodcroft
Hammond at the Office of the Commissioners of Patents, with his
Petition, on the 1st September 1878.
I, HENRY WOODOROFT HAMMOND, of 27, Southampton Buildings,
5 Chancery Lane, in the County of Middlesex, Civil Engineer, do hereby
declare the nature of the said Invention for "AN IMPROVED COMPOUND
BLOWER."-A communication from abroad by Philip Syng Justice, of the
City and County of Philadelphia, in the State of Pennsylvania, United
States of America, to be as follows:-
) This Invention relates to the employment of a combustion of two or
more alternating series of stationary and rotative wings in such a manner

page_text: as to gain a considerable increase of pressure over all other known
rotary machines for a like purpose now in use, and consists of an iron
shell or frame with concave sides and provided with two projecting
inlet elbows, said elbows being further provided with journal boxes for
the support of a horizontal driving shaft passing through the centre of
said shell or frame; in the centre of said driving shaft a rotary disc is
firmly secured, having wings fitted on each of its sides, whilst other and
stationary intervening wings are fitted to the concave sides of the shell.
The winged disc is rotated by means of a pulley driven by any source
of power, fixed on the central shaft.
The operation of compiunding the pressure is secured by rotating the
disc with its attendant wings in the direction of the outlet, the first row
of wings from the inlet taking violent hold upon the air in the same
manner as ordinary centrifugal blowers when the air is deflected from
its rotative course by the first row of stationary wings, and thus causes
the air to approach the next succeeding row of rotative wings in a
direction at right angles to the motion under all the pressure that the
first operation is capable of imparting, and when the air comes in contact
with the next succeeding row of wings there is as much more pressure
added to the air as equals the first series of wings, and this amount of
increase of pressure occurs in every series of wings however greatly they
may be multiplied, and it is intended to so multiply the rows of wings
until the desired pressure is obtained.
It will be evident that this method of increasing pressure can be
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Woodcroft Hammond in the Great Scal
Patent Office on the 27th February 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY 30
WOODCROFT HAMMOND, of 27, Southampton Buildings, Chancery Lane,
in the County of Middlesex, Civil Engineer, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of September, in the year.

page_text: or our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Henry Woodcroft Hammond, Her
special licence that I, the said Henry Woodcroft Hammond, my executors,
administrators, and assigns, or such others as I, the said Henry Woodcroft
Hammond, 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
"AN IMPROVED COMPOUND BLOWER," a communication to me from abroad
by Philip Syng Justice, of the City and County of Philadelphia, in the
State of Pennsylvania, United States of America, upon the condition
(amongst others) that I, the said Henry Woodcroft Hammond, 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 Henry Woodcroft Hammond; 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 :—
My Invention consists in the compounding of the rotative and
stationary wings, in the manner and for the purpose as herein-after
described.
"
The object of the Invention is to increase the pressure of blowers.
In order to enable others to use and practice my Invention I will
proceed to describe its construction and operation.
On reference to the accompanying Drawings which form part of this
Specification Figure 1. is a vertical section across line 3 and 4. of Fig. 2;
and Fig. 2 is a vertical section across line 1 and 2, Fig. 1. Similar letters
refer to similar parts, of which a and b are the concave sides, screwed
together on their outer edge and terminate in base g, and are provided
with inlet elbows d; said elbows are provided with journal boxes for the
support of shaft c; disk i is firmly secured to shaft c, and wings rare

page_text: HENRY WOODCROFT HAMMOND. (L.S.)