Improvements in Propelling Apparatus for Ships or Vessels.
Year: 1893

page_text: Date of Application, 17th Nov., 1893
Complete Specification Left, 16th May, 1894-Accepted, 30th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Propelling Apparatus for Ships or Vessels.
1 THOMAS ARMSTRONG of No. 150 Battersea Park Road, London, S.W.,
Gentleman do hereby declare the nature of this invention to be as follows:-
This invention consists of a rotary propeller or propelling apparatus formed of
one, two or more fins or blades each of which represents or constitutes exactly or
approximately a segment or section of a hollow sphere, globe or ball which may
be of any proportions or diameter suitable or appropriate to the size, space or
measurement of any class of vessel. Each fin or blade may also constitute a
segment or section of an ellipse, cone or dome of any proportions or diameter, the
surface of which is a curve or the segment of any curve whatsoever. To and at
the edges or extremities of the segment or section forming the fin or blade I reserve
the right to place, fix, attach or add a curved rim or lip of any or varying
proportions or area. I further reserve the right to place each fin or blade in any
position and at any inclination, degree or angle, also of attaching the propeller to
any part of the vessel or to any apparatus or appliance appertaining thereto. The
fins or blades may be made in any proportions, of metal or other material and.
attached longitudinally or otherwise to the shaft or countershaft preferably by a.
boss having a central chamber or cavity through which the shaft passes and is
secured by nuts, keys, pins or other means. This propeller rotates by and with
the shaft or countershaft and is designed for propelling, turning or moving ships or
vessels forward astern or otherwise.
Dated this 17th day of November 1893.
COMPLETE SPECIFICATION
Improvements in Propelling Apparatus for Ships or Vessels.
I, THOMAS ARMSTRONG, of 150 Battersea Park Road, London, S.W...
Gentleman, 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:-
My invention relates to an improved propeller-blade. The object of my said.
invention is the construction of a propeller-blade of a novel kind, which, in
operation, will be more efficient than propeller-blades of the types hitherto
commonly employed.
The blade comprises or constitutes, exactly or approximately, a segment or
section of a hollow sphere, globe or ball which may be of any desired proportions..
To the segment or section forming the blade I reserve the right to attach or add
as a continuation in any curve of the spherical surface a rim or lip of any or
varying proportions or area. Such rim or lip may have a cylindrical surface and
may be shaped like the mouth of a bell or a section thereof or otherwise.
One, two or more blades may be used as a propeller and the same can be made.
of metal or any other material and in any or such proportions, thickness or area as
may be deemed applicable to ships, vessels or other bodies, aërial or marine, of
any description whatsoever and as may be adaptable to the machinery available for
rotary propulsion in connection with the same.

page_text: I also reserve the right to place each blade in any position on a boss or shaft
whether longitudinally, diagonally or otherwise and at any inclination, degree or
angle, also of attaching the blade to any part, apparatus or machinery of the
vessel or other body as may be deemed desirable for the purposes of propulsion.
In order that my said invention may be more clearly understood I will now
proceed to describe the same with reference, by way of example, to the accompanying
drawings, wherein,
Figure 1 is an after or outer end view of a boss with a single blade thereon.
Figure 2 is an elevation, viewed from the forward or inner end of the boss, of
the parts shown in Figure 1.
Figure 3 is a perspective view of the boss and blade which are shown otherwise
in Figures 1 and 2.
Fig. 4 is a horizontal section and Fig. 5 a vertical section of Fig. 3.
Like reference-letters indicate corresponding parts throughout the drawings.
A is the boss, prepared at A' to receive the shaft, B is the blade. B is the
spherical or approximately spherical portion of the blade. B is the rim or lip.
The arrow, in the drawings indicates the direction in which the blade is intended
to move when running ahead, consequently C is the leading edge, D the following
edge.
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 :-
1. A propeller-blade which is spherical, being a segment or section of a hollow
sphere, globe or ball, substantially as set forth.
2. A propeller-blade wherein the leading part is spherical, and the following
part a rim or lip as a continuation of the spherical surface, substantially as set
forth.
3. Propeller-blades comprising or constituting any segments or sections of hollow
spheres, globes or balls of any proportions, circumference or diameter.
Deted this 11th dow of Mo 1901
THOMAS ARMSTRONG.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.