An Improved Motor for Steam, Hydraulic, or other Power.
Year: 1890

page_text: Date of Application. 13th Feb., 1890
Complete Specification Left, 3rd Nov., 1890-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Motor for Steam, Hydraulic, or other Power.
I JOHN ROBSON of 47 Seventh Avenue Heaton Newcastle upon Tyne Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to produce a motor which shall be simple in its
parts and details and give a direct connection to the work to be performed with a
steady and unvarying velocity. I accomplish this in the following manner by
means of a direct rotary action thus dispensing with intermediate machinery and
gearing.
There is a disc fixed or keyed onto a spindle or shaft. This spindle or shaft with
the disc is caused to revolve or rotate by steam, water or other power "as follows:-
Towards the outer circumference or periphery of the disc there is a rectangular or
other shaped sliding bar, or piston passing through the disc and meeting at each
side of it the surface of a case or hollow cylinder which cylinder or case encloses the
disc. This fixed case or cylinder may be made in two or more parts for the
convenience of putting together and detaching. Through its centre passes the axle
or spindle on which the disc is fixed.
On each inner face of the case or cylinder there is a groove opposite to the sliding
bar and in the form of an inclined plane beginning at zero or the face of the case or
cylinder and extending at the opposite diameter to any required depth and returning
again to zero when the whole circle has been completed so that the effective area of
action is proportionate to the amount of projection of the sliding bar or piston from
the face of the revolving disc into the recess or groove on the inner surface of the
case or cylinder and this is increased on one side of the disc just as much as it is
decreased on the other as the disc revolves, so the power exerted is practically the
same through the whole revolution and the velocity constant. On such inner face of
the case or cylinder there is at a suitable small distance from the centre or axle a
groove or part or segment of a groove of necessary dimensions and shape into which
the supply of steam water or other propelling fluid enters from the outside. Passing
thence into a corresponding recess in the face of the revolving disc and an aperture
or hole in the disc radially shaped or otherwise and coming out in another opening
immediately behind the sliding bar or piston thus causing the disc containing the
sliding bar or piston to rotate continuously in the same direction. The exhaust is
carried off by having an exhaust port immediately in front of the sliding bar or
piston on the revolving disc and having an aperture passing through the disc or
outer circumference or periphery of the disc and discharging into a space between
the outer periphery of the disc and the inner surface of the case or cylinder thence
through an opening in the case or cylinder by pipes in the ordinary way, or the
exhaust steam may be led inwards towards the centre to an aperture in the disc
corresponding to a groove in the case or cylinder and thence through a suitable
opening in the case.
It will thus be seen that the flow of the steam is continuous and in the same
direction as well as the lead of the exhaust and all the parts being rotary there is no
loss of power as in reciprocating parts.
The direction or action of the machine or engine may be reversed by a cock or
valve having suitable ports so as to change the steam to exhaust ports and the
exhaust to steam ports.
The sliding bar or piston may be connected by a rod or other means to a corre-
sponding bar on the opposite side or diameter so as to put the whole of the revolving
parts in equilibrium and so prevent shock and loss of power from friction and other
causes.
The whole may be made of any suitable metal or other material and drain cocks

page_text: can be fixed on the case or cylinder to carry off water or condensed steam or other
fluids and any amount of expansion of steam may be given by limiting the extent of
the groove in the case or cylinder through which the steam is supplied.
The piston or sliding bar, the disc, and inner surface of the case or cylinder can
when necessary be fitted with metallic or any other suitable packing.
Two or more of these machines may be combined so as to have a compound,
triple quadruple or other expansive arrangements as may be desired.
The whole may be made of any suitable metal or metals or material and of any
approved pattern or design.
Dated thig 19th day of Fahru 1800
COMPLETE SPECIFICATION.
An Improved Motor for Steam, Hydraulic, or other Power.
I JOHN ROBSON of 47 Seventh Avenue Heaton Newcastle upon Tyne Mechanical
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 object of this invention is to produce a motor which shall be simple in its parts
and details and give a direct connection to the work to be performed with a steady
and unvarying velocity. I accomplish this in the following manner by means of a
direct rotary action thus dispensing with intermediate machinery and gearing. The
whole is illustrated and explained by the drawing annexed in which
Fig. 1 is an end view of the machine.
Fig. 2 is a vertical longitudinal section shewing the disc and shaft in elevation.
Fig. 3 is a horizontal section shewing the disc and shaft in plan.
Fig. 4 is an inside view of one of the cylinder covers shewing the admission
port / &c.
Fig. 5 is a section through the revolving disc shewing the piston bar c in
elevation.
Fig. 6 is a plan on one side of the revolving disc and Figs. 7 and 8 are elevations
of the piston bar, rod and balance weights.
l
C
In which figures, a is the revolving disc is the shaft or axle. .c is the sliding bar
or piston. e a hollow cylinder enclosing the disc. d covers for the same. f is the inclined
plane or ascending groove rising to zero or the starting point of piston at g.
hare
ports in covers, k supply pipe, i steam passages, port in disc, m steam passage in
disc. n the opening from the same. o is the exhaust port in disc in front of sliding
bar the aperture from the same 9 the space between disc and inner surface of case
exhaust pipe r.
s balance rod for piston, t balance weight, u is the slot in disc
for vibration of piston rod, is the packing on liners and w is the arrow shewing
the direction of motion.
There is a disc a of two or more parts fixed or keyed on to a spindle or shaft b.
This spindle or shaft with the disc is caused to revolve or rotate by steam, water
or other power as follows-Towards the outer circumference or periphery of the
disc there is a rectangular or other shaped sliding bar or piston e passing through
the disc and meeting at each side of the surface of the cover d of a case or hollow
cylinder e which may be the bed plate or not as may be preferred, which cylinder
or case encloses the disc a. This fixed case or cylinder e may be made in one
or more parts for the convenience of putting together and detaching.
1
Through its centre passes the axle or spindle 6 on which the disc a is fixed.
On each inner face of the covers d, d, of the case or cylinder e, there is a groove ƒ
opposite to the sliding bar cand in the form of an inclined plane regular or
varied, beginning at zero g on the inner face of the cover of the case or cylinder

page_text: and extending at the opposite diameter to any required depth and returning again
to zero when the whole circle or one rotation has been completed. So that the
effective area of action is proportional to the amount of projection of the sliding
bar or piston e from the face of the revolving disc into the recess or groove f of
the inner face of the cylinder cover and this is increased at points diametrically
opposite to each other at one side of the disc just as much as it is decreased on
the other as the disc revolves.
So with full steam or otherwise the power exerted is practically the same
through the whole revolution and the velocity constant. On each inner face of
the case or cylinder there is at a suitable small distance from the centre or axle
a groove or segment of a groove or port h of necessary dimensions and shape
into which the supply of steam, water, or, other propelling fluid enters through
the passages i in cylinder e and covers d from the supply pipe k. Passing thence
at a portion of the revolution of disc into a corresponding recess or port in the
face of the revolving disc a and through an aperture or hole in the disc radially
shaped or otherwise then passing through an opening m and coming out in
another opening n immediately behind the sliding bar or piston c thus causing the
disc containing the sliding bar to rotate continuously in the same direction. The
exhaust is carried off by having an exhaust port o immediately in front of
the sliding bar or piston c on the revolving disc a and having an aperture p
passing through the disc to the outer circumference or periphery of the disc and
discharging into a space 9 between the outer periphery of the disc and the inner
surface of the case or cylinder thence through an opening in the case or cylinder by
pipes in the ordinary way. Or the exhaust steam may be led inwards towards the
centre to an aperture in the disc corresponding to a groove in the case and thence
through a suitable opening.
It will thus be seen that the flow of the steam is continuous and in the same
direction as well as the lead of the exhaust, and all the parts being rotary there
is no loss of power as in reciprocating machines. The opposite side of the disc
acting in a similar manner having its ports of admission &c. opposite or nearly so.
The direction or action of the machine or engine may be reversed by a cock or
valve having suitable ports so as to change the steam to exhaust and the exhaust
to steam ports. The motor may also be driven in the opposite direction by
reversing the disc. The sliding bar or piston may be connected by a rod s or
other means to a corresponding bar or other balance weight on the opposite
diameter so as to put the whole of the revolving parts in equilibrium and so
prevent shock and loss of power from friction and other, causes.
There being
suitable slots u in the disc to allow for the reciprocating longitudinal motion of the
piston bar. The piston bar e may have a suitable metallic or other spring to facilitate
its reciprocating action and the cylinder and covers may have adjustable, elastic or
other packing or liners so as to give any necessary amount of freedom or relief to
the disc. The direction of motion is shown by the arrow w in Fig. 6.
Drain cocks for condensed steam &c. can be fixed on the case or covers and any
amount of expansion may be given by limiting the extent of the ports referred to
already.
The piston or sliding bar, the disc and inner surface of the case or cylinder may be
fitted with metallic or any other packing.
Two or more of these machines may be combined so as to have a compound triple,
quadruple or other expansive arrangement as may be desired.
The whole may be made of any suitable metal or material and of any suitable
pattern or design.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. In rotatory motors plain or varying inclined planes for the action of a recipro-
cating piston bar in a rotating disc as described.

page_text: 2nd. In rotatory motors the manner of admitting the steam so as to obtain full
steam or any amount of expansion.
:
3rd. In rotatory motors the balancing the centrifugal force of the reciprocating
piston bar as described.
4th. The whole arrangement for a rotatory motor substantially as described and 5
illustrated by the Specification and drawing.
Dated this 27th day of October 1890.
J. A. G. ROSS,
Patent Agent for the Applicant, John Robson.