IMPROVE- MENTS IN ROTARY ENGINES
Year: 1862

page_text: LETTERS PATENT to Richard Archibald Brooman, of, 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVE-
MENTS IN ROTARY ENGINES."-A communication from abroad by Serkis
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 19th March 1862.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN ROTARY ENGINES," (communicated to me from abroad
by Serkis Ballian, of Constantinople, Turkey,) to be as follows:-
This Invention consists of a movable piston sliding in a mortised shaft
tangent to the interior surface of an ellipsoidal cylinder, which piston is in
constant contact at its ends with the inner surface of the said cylinder. Metal
packings kept up by springs are fitted to the ends and sides of the piston as
also to that part of the shaft through which the piston slides. At the sides
where the shaft enters and leaves the cylinder it is made conical, and a
correspondingly shaped collar is pressed into contact therewith by springs in
order to ensure a steam-tight joint. By reversing the inlet and outlet the

page_text: shaft can be made to revolve in either direction. A lubricating passage at
the top of the cylinder fitted with taps admits lubricating matter into the
cylinder, and passages are also provided for lubricating the conical parts of the
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent
Office on the 19th September 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
1
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of March, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of
Her reign, did, for Herself, 'Her' heirs and successors, give and grant unto
me, the said Richard Archibald Brooman, Her special licence that 'I, the
said Richard Archibald Brooman, my executors, administrators, and assigns,
or such others as I, the said Richard Archibald Brooman, 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 ROTARY ENGINES," (communi-
cated to me from abroad by Serkis Ballian, of Constantinople, Turkey), upon the
condition (amongst others) that I, the "said'
the said "Richard Archibald Brooman,
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..
gill not
I NOW KNOW YE, that I, the said Richard Archibald, Brooman,:.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 thereof, reference being had to the Drawings
bereunto, annexed, that is to say:-1:
)
This Invention consists of a movable piston sliding in a mortised shaft

page_text: as
tangent to the interior surface of an ellipsoidal cylinder, which piston is in
constant contact at its ends with the inner surface of the said cylinder. Metal
packings kept up by springs are fitted to the ends and sides of the piston
also to that part of the shaft through which the piston slides! At the sides
where the shaft enters "and leaves the cylinder it is made conical, and a
correspondingly-shaped collar is pressed into contact therewith by springs in
order to ensure a steam-tight joint. By reversing the inlet and outlet the
shaft can be made to revolve in either direction. A lubricating passage at the
top of the cylinder, fitted with taps, admits lubricating matter into the cylinder,
and 1 passages are also provided for lubricating the conical parts of the shaft.
The engine is worked by steam, air, or any other gas...
..
Figure 1 of the accompanying, Drawings is an end view; Figure 2'a trans-
verse section, Figure 3, a side view, Figure 4 a plan, and Figure 5 a longi-
tudinal section of a rotary engine constructed according to this Invention.
=-
A is the ellipsoidal cylinder in which steam, air, or other gas is admitted;
and through a piston C communicates rotary motion to the main shaft B. To
prevent leakage from one side to the other of the p
e piston consequent upon wear,
there is a metal packing a at each end of the piston, which bears upon and is
kept up by a spring b, which may be easily replaced when required. By this
means wear and any imperfection that might exist in the inner surface of the
cylinder are at one and the same time provided against. d, d, are plates bolted
to the ends of the cylinder. Metal packings pressed up by springs are also
inserted in the sides of the piston to keep them tight against the inner sides of
the plates d, d. c, c, are packings placed inside the shaft and pressed by
springs 9, 9, into contact with the piston C. The shaft must be kept tangent
with the surface of the cylinder, and this is accomplished by means of a
plate m and spring o. The joints p, q, r, s, t, u, between the shafts and the
plate are made steam-tight by a conical collar r, q, v, x, u, t, v, x, fitted on a
conical portion of the shaft. As the collar becomes worn it is pressed up by
the gland p, h, x, v, s, v, h, x. e, e, are holes through which to lubricate the
shaft. G is a tap for introducing oil or other matter for lubricating the
interior of the cylinder; I, I, are the inlet and outlet steam passages; D is a
tap for admitting the steam to drive the engine forward or backward; this tap
also acts as a regulator. L is a key for working the tap. The frame is
composed of two uprights H, H, carrying bearings, and a standard K, which
supports the cylinders. The supply pump, the fly wheel, and the centrifugal
regulator are not shewn in the Drawing, these parts requiring no particular
description.
And having now described the nature of the said Invention, and in what

page_text: manner the same is to be performed, I declare that I claim as the "Improve-
ments in, Rotary Engines,"-
First, the employment of a movable piston sliding in a mortised shaft
tangent to the interior surface of an ellipsoidal cylinder, the said piston being
in constant contact at its ends and sides with the inner surface and ends of the
said cylinder, as herein-before described and illustrated in the accompanying
Drawings.
Second, the employment of metal packings acted on by springs and applied
in manner and for the purposes herein-before described.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, the Nineteenth day of September, One
thousand eight hundred and sixty-two.
K. A. BROOMAN. (L.S.)