Improvements in and relating to Screw Propellers.
Year: 1896

page_text: Date of Application, 24th June, 1896
Complete Specification Left, 24th Mar., 1897-Accepted, 19th June, 1897
SIONAL SPECI
ICATION.
Improvements in and relating to Screw Propellers.
I, WILLIAM WILSON HORN of the Firm of Horn, Son & Co. Patent Agent, of
151 Strand London do hereby declare the nature of this invention (a communication
to me by Nelson W. French of Sayre, Pennsylvania U.S.A. Engineer) to be as
follows:-
This invention relates to improvements in and relating to screw propellers and
my invention consists in an improved propeller having a boss preferably flattened
for one half its length in one direction and flattened in a direction at right angles
thereto for the remaining half of its length, so that said boss appears to consist of
two more or less oval shaped portions. To each end of said boss I attach-say
by means of suitable "straps"-a' pair of opposite arms the outer end of which
arms support helically shaped blades running in the direction of the length of
said boss the arrangement being such that a clear space is left between the boss
and the blades except where the arms referred to are situated.
I wish it to be understood that I do not confine myself to employ a boss
shaped as described and the blades may be situated at any desired distance from
said boss.
ow
1
T
1000
HORN, SON & Co.,
151 Strand (next to Somerset House), London, W.C.,
Agents for the Applicant.
Improvements in and relating to Screw Propellers.
1 WILLIAM WILSON HORN of the Firm of Horn Son & Co., Patent Agent of
151 Strand London do hereby declare the nature of this invention (a communication
to me by Nelson W. French of Sayre Pennsylvania U.S.A. Engineer) and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
This invention relates to improvements in and relating to screw propellers and
my invention consists in an improved propeller constructed substantially as hereinafter
described.
In order that my invention may be readily understood reference is made to the
accompanying drawing which shows my improved propeller in perspective.
In carrying out my invention I employ a boss or equivalent A, A¹, preferably of
about the shape shown and one flattened part A of which boss is at about right angles
to the other flattened part A¹.
To each end of said boss I attach-say by means of suitable metal "straps "a
pair of opposite arms B the outer ends of which arms support helically shaped
blades C running in the direction of the length of said boss, the arrangement and
D

page_text: dimensions of the blades being such that a clear space is left between the boss and the
blades except where the arms B are situated.
I wish it to be understood that I do not confine myself to employ a boss
shaped as shown and described and that the blades may be situated at any desired
-distance from said boss.
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:
A propeller having helically shaped blades and supported a suitable distance from
their supporting boss substantially as described and illustrated.
HORN, SON & Co.,
151 Strand (next to Somerset House), London;
Agents for the Applicant."