Year: 1888

page_text: Date of Application, 9th May, 1888
Complete Specification Left, 7th Feb., 1889
Complete Specification Accepted, 9th Mar., 1889
I, GEORGE EDWARD VAUGHAN, of 57, Chancery Lane, in the county of Middlesex,
Patent Agent, do hereby declare the nature of this invention, which has been com-
municated to me from abroad by Samuel Trott, of Halifax, Nova Scotia, to be as
follows:-
In twin-screw ships, as ordinarily constructed, the propellors are arranged on
opposite quarters of the vessel and those portions of the shafts thereof which protrude
through the hull are arranged within tubes, the shafts and tubes being retained in
position by stays or brackets.
The protruding ends of the shafts, above referred to, are a source of great weakness,
and for the purpose of avoiding such disadvantage this invention consists in building
the hull of the vessel down on each quarter sufficiently to enclose the two shafts, the
propellors being mounted on the ends of the shafts which project, sufficiently for that
purpose, beyond such built down portions of the hull.
I will now proceed to refer to the accompanying drawings from which the nature
of this invention will be more clearly understood. Figure 1. is a side elevation of a
portion of the hull of a twin-screw ship, and Figure 2. is an end view of the stern of
the same.
The same letters of reference indicate like parts in both the Figures.
A. A. are the built down portions of the hull enclosing the propellor shafts, a. a. are
the propellers and B. is the rudder.
000
VAUGHAN & SON,
Agents for the Applicant.

page_text: Improvements in Twin-screw Ships.
1, GEORGE EDWARD VAUGHAN, of 57 Chancery Lane, in the county of Middlesex,
Patent Agent, do hereby declare the nature of this invention, which has been
communicated to me from abroad by Samuel Trott, of Halifax, Nova Scotia, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
In twin-screw ships, as ordinarily constructed, the propellors are arranged on
opposite quarters of the vessel and those portions of the shafts thereof which protrude
through the hull are enclosed within tubes, the shafts and tubes being retained in
position by stays or brackets.
The projection of the shafts beyond the vessel is a source of great weakness, and, in
order to obviate this defect I according to my invention build the hull of the vessel
down on each quarter sufficiently to enclose the two propellor shafts, the propellors
being mounted on the ends of the shafts which project, sufficiently for that purpose,
beyond such built down portions of the hull.
I will now proceed to refer to the drawings accompanying my provisional
specification.
DESCRIPTION OF THE DRAWINGS.
Figure 1. is a side elevation of a portion of the hull of a twin-screw ship having my
invention applied thereto, and Figure 2. is an elevation of the stern of the same.
The same letters of reference indicate like parts in both the Figures.
A. A are the built down portions of the hull enclosing the propellor shafts, a. a. are
the propellors and B. is the rudder.
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: :-
In twin-screw ships, building the hull of the vessel down on each quarter and
enclosing the propellor shafts in such built down portions, substantially as herein
shown and described and for the purpose stated.
Dated this Seventh day of February 1889.
VAUGHAN & SON,
Agents for the Applicant.