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

page_text: Date of Application, 27th Jan., 1893
Complete Specification Left, 5th Apr., 1002 Accepted, 24th June, 1902
PROVISIONAL SPECIFICATION.
Improvements in Propelling Apparatus for Ships or Vessels.
I THOMAS ARMSTRONG of No. 150 Battersea Park Road London S. W. General
Agent do hereby declare the nature of this invention to be as follows:—
(1) This invention consists of a propeller or propelling apparatus resembling in
shape the tail of a fish with the points or tips curved or bent.
(2) It is not limited to size and can be made of wood, metal or other materials, in
one blade or in sections or otherwise, and attached to the end, or other part of a
shaft or connecting rod, or formed of 2 fins or blades and attached to the end or
other part of a shaft or connecting rod.
(3) Certain parts of the apparatus are curved or concave.
(4) The motion of this propoller or propelling apparatus is rotative and it may
be worked for moving the vessel forward or driving the vessel astern or otherwise
according to the motion of the shaft or connecting rod and mode of steering.
Dated this 27th day of January 1893.
THOS. ARMSTRONG.
COMPLETE SPECIFICATION.
Improvements in Propelling Apparatus for Ships or Vessels.
I THOMAS ARMSTRONG of 150 Battersea Park Road in the County of Surrey
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
aud by the following statement:-
This invention consists of a propeller or propelling apparatus resembling in shape
the tail of a fish with the points or tips curved or bent.
It is not limited to size and can be made of metal or other materials.
It may be made in one blade, of 2 fius and attached or secured to the end or
other part of a shaft or counter-shaft longitudinally or in a line with the same, and
by which it is rotated. It may also be made of 3 or more fins and attached
longitudinally to the shaft or counter-shaft.
The outer end of the propeller is set at an acute or obtuse angle, preferably acute,
and will be of greater diameter than that of the inner end.
Certain parts of the apparatus are curved or concave.
To enable my invention to be more readily understood and carried into effect
I will proceed to describe the same with reference to the accompanying drawings
in which
Fig. 1, is a side elevation of the apparatus.
Fig. 2 is an outer end clevation of the apparatus.

page_text: 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 one bladed propeller secured and fixed longitudinally to or in a line with
the shaft, or counter-shaft and resembling in shape the tail of a fish.
2. A. one bladed propeller possessing two fins secured and fixed longitudinally to
or in a line with the shaft or counter-shaft.
3. Propellers of two, three, or more fins, fixed longitudinally to or in a line with
the shaft or counter-shaft with the angles more or less acute.
4. Propellers made in one piece or in two, three or more sections or fins attached
to a shaft or counter-shaft at their inner end or through or between which the
shaft or counter shaft will pass and be secured, and which by their special
disposition will offer less resistance to the back-water or after-current than ordinary
propellers substantially as described and set forth in the foregoing Specification.
Dated this 5th day of April 1893.
LE FEVRE & Co.,
26, Budgo Row, Cannon Street, London, E.C., Agents for the Applicant.