Year: 1897

page_text: Date of Application, 7th May, 1897
Complete Specification Left, 5th Feb., 1898-Accepted, 12th Mar.,
1898
I, JOHN MCKECINIE, of 17, Oswald Street, in the City of Glasgow, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention which relates to screw propellers consists in casting or fixing
upon the boss or between the blades of a screw propeller, one or more projections,
collars or rings to be used for the purpose of thrusting direct upon the sea water,.
and thus indirectly conveying additional motion or power to the ship.
These projections, collars or rings may be of any shape or form, and may be
cast upon and form part of the propeller, or they may be fitted and fixed upon
either the boss or the blades, by any form or kind of attachment.
The projections exert a direct thrust upon the sea water, with its corresponding
advantage to the ship.
Dated this 6th day at Von
1907
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
, Saint Vincent Street, Glasgow, Agent for the Applicant.
I, JOHN MCKECHNIE, of 17 Oswald Street, in the City of Glasgow, 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:
This invention which relates to screw propellers consists in casting or fixing
upon the boss or between the blades of a screw propeller, one or more projections,
collars or rings to be used for the purpose of thrusting direct upon the sea water,
and thus indirectly conveying additional motion or power to the ship.
The invention is illustrated by the accompanying drawings, Figure 1 being an
end elevation, and Figure 2 a plan of the propeller in which the collar is cast
integral with the propeller, and Figures 3 and 4 are views corresponding respec-
tively to Figures 1 and 2 showing the ring or collar made in several parts bolted
to the boss of the propeller. Figures 5 and 6 are respectively elevation and plan
shewing the propeller as fitted or formed with three rings or collars, and Figure 7 a
plan shewing the propeller having projections or corrugations on its boss, instead of
rings or collars.

page_text: In carrying out the invention I form the collar or ring A.upon the propeller
boss B and extending between the blades C. The collar or ring may be of any
shape or form in cross section but is preferably made conical and may be cast
upon and form part of the propeller, as shewn at Figures 1 and 2, or it may be
fitted and fixed upon either the boss, as shewn at Figures and 4, or secured to
the blades by any form of attachment. As shewn at Figures 5 and 6 three collars
or rings A, or a greater or less number may be formed or fitted on the propeller
boss, and when there are two or more such collars or rings, orifices such as a are
formed in the propeller blades near the boss to permit of the passage of the water.
The rings or collars near each end of the boss may take the form of face plates
attached to the ends of the boss, and may be perforated.
Or a series of projections or corrugations may be formed upon the boss as shewn
at Figure 7.
The collars or projections thus formed between the blades exert a direct thrust
upon the sea water, with its corresponding advantage to the ship.
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 screw propeller having a collar or ring or like projections formed or fitted
on the boss and extending between the blades of the propeller substantially as set
forth.
2. A screw propeller having a number of collars, rings, corrugations or like
projections formed or fitted on the boss and extending between the blades of the
propeller substantially as set forth.
L L
1
1
теле
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
2, Saint Vincent Street, Glasgow, Agent for the Applicant.