An Improved Rotary Motor to be Driven by Steam or other Motive Fluid.
Year: 1897

page_text: Date of Application, 13th July., 1897-Accepted, 12th Feb. 1898
COMPLETE SPECIFICATION.
An Improved Rotary Motor to be Driven by Steam or other
Motive Fluid.
I, CONRAD FRIEDRICH CHRISTIAN LOHMANN, of No. 13, Andrew Street, Northcote,
near Melbourne, in the Colony of Victoria, Engineer, do hereby declare the nature
of this invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:—
The main object of this invention is to provide a rotary motor which can be
worked by steam, compressed gas, or other motive fluid, and which will develop
a maximum amount of power with a minimum of cost and which will utilize
certain novel principles of action and re-action as hereinafter described.
In order to facilitate a clear understanding of the invention, I will describe
it by reference to the accompanying drawings wherein,
Figure 1, is a vertical central section of a motor constructed according to this
invention.
Figure 2, is a side elevation, and
Figure 3, is a horizontal section on line 3-3 Figure 1, whilst,
Figure 4, is a vertical section of a certain part of the motor.
The same letters of reference indicate the same parts in all the figures.
A represents a horizontal rotating disc having a number of radial inclined
blades B around its periphery. This disc may be cup shaped as shewn in Figure 1,
or its
upper surface might be inclined so as to form a conical disc although the shape
shewn is preferable.
This disc A is mounted upon a spindle a which rests upon a vertically adjustable
cone a¹ in the centre of a second horizontal rotating disc C, and said disc A is also
provided with an upwardly extending spindle or shaft which is steadied in gun
imetal or other bearings a carried by a casting D forming the main frame or support
of the motor.
The upper disc A can be adjusted relatively to the lower one C by means of a
conical ended set screw E passing into the central boss c¹ of the lower disc C, and
arranged so that its conical end e hears against the underside of and thus supports
the conical stud a¹ carrying the spindle of the dise A. By turning this set screw E
in the required direction it will be obvious that said disc A can be raised or lowered
with great exactitude and thus the adjustment between the two discs can be readily
made.
The lower disc C like the upper one, has a number of radial inclined blades F
which are however set at an opposite angle to the blades B as shewn in Figure 4,
and which moreover are made larger, that is they occupy a space equal to two or
more of the blades B.
They are also each provided with a small hole or recess f as shown.
The disc C is mounted upon a vertical spindle G which passes through a gun
metal or other bearing g carried by the groove D and which rests upon a point
bearing g', whereby it can be adjusted to suit requirements.
An annular channel or chamber his formed on the underside and around the

page_text: centre of the disc C and this chamber is provided with a stuffing box h¹ whereby
a fluid tight joint is provided around an encircling sleeve h² projecting up from the
bearing 9.
From this chamber h one or more pipes H is or are led to one of the radial
blades and is formed with an upwardly and rearwardly inclined discharge or
delivery port h³ as shewn in Figure 4, so that the current of steam or compressed
gas will be delivered therefrom against the radial blades B of the upper disc A.
The supply of steam or other motive fluid to the chamber h may be through
the inlet pipe H' and this chamber when the motor is to be used with compressed gas
may be made much smaller than is shewn in the drawings as will be readily under-
stood by practical mechanics and moreover some suitable igniting contrivance
must be provided for lighting the gas as it issues from the supply pipe or pipes H
together with a pump or pumps for compressing such gas and forcing it into a small
compression chamber prior to being used in the motor.
A chimney I is fitted around the upper portion of the motor by being bolted
down firmly to the frame or casting D) and extends upwardly for a sufficient height
to cause a draught as the motor is working.
The operation of the invention is as follows:---
The two discs A and C having been carefully adjusted so that they revolve
clear of each other with the least possible space between them, steam, compressed gas,
or other motive fluid is supplied through the pipes H' and H to the inclined discharge
ports h³ whereby such fluid will be directed against the blades B of the disc A,
thus causing same to rotate at a high speed. The effect of the heat and the fluid
current generated will be to rotate the disc Cin the opposite direction, thus using
a certain amount of power that would be otherwise wasted.
The rotary motion of the discs A and C can be utilized in many different ways, as
for instance by means of belts leading off pulleys on the spindles G and a² it being
merely necessary in the event of movement in one direction only being required
to use a crossed belt on one of the pulleys as will be readily understood.
The action of the motor will be greatly assisted by the draught in the chimney I
and under some circumstances it might be practicable, by increasing the size of the
discs A and C together with that of said chimney, to utilize this draught for driving
the motor.
Another application of the invention for electrical purposes might be to use the
one disc as a rotating field and the other as an oppositely rotating armature.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
-
First. The herein described rotary motor to be driven by steam or other motive
fluid consisting of the various parts constructed arranged and operating sub-
stantially as and for the purposes herein described and explained and as illustrated
in the accompanying drawings.
Second. In a rotary motor to be driven by steam or other motive fluid a pair
of oppositely rotating discs having inclined radial blades around their peripheries
the blades of one dise being set at an opposite angle to the blades of the other disc
substantially as and for the purposes herein described and explained and as illustrated
in the accompanying drawings.
Third. In a rotary motor to be driven by steam or other motive fluid a disc
(such as A) having a number of inclined radial blades in combination with a
second disc (such as C) having an inclined delivery port (such as h³) substantially
as and for the purposes herein described and explained and as illustrated in the
accompanying drawings.
Fourth. In a rotary motor to be driven by steam or other motive fluid a pair
of oppositely rotating discs (such as A C) fitted with inclined radial blades in
combination with a chimney encircling said discs at its lower end and extending
high enough to cause a draught through said blades substantially as and for the

page_text: purposes herein described and explained and as illustrated in the accompanying
drawings.
Dated this Fifth day of June One thousand eight hundred and ninety-seven.
C. F. C. LOHMANN.
G. F. Redfern & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
C. F. C. LOHMANN.
G. F. Redfern & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.