Improvements connected with the Propulsion of Vessels.
Year: 1892

page_text: Date of Application, 29th Apr., 1892
Complete Specification Left, 30th Jan., 1893-Accepted. 4th Mar. 1893
PROVISIONAL SPECIFICATION.
Improvements connected with the Propulsion of Vessels.
We DAVID GRIFFITH DAVIES of 7 Railway Street Fitter and Engineer and
ROBERT HUGHES Engineman of 58.Queen Street both of Bilston Staffordshire.
do hereby declare the nature of this invention to be as follows :—
This invention relates to that class of propellers in which a series of floats are
attached to an endless chain such as is described in the Specification of the-
Patent No. 209 of 1886. In the arrangement described in this Specification it is.
found that difficulty is experienced in backing the ship as the floats in such motion
move edgeways through the water.
•
According to this invention a right angle plate is attached to the floats so as to
act as a float when the floats are parallel with the chain when moving for backing
the ship, the other side of this angle piece is set at an incline to readily pass.
through the water when the floats are moving in the reverse direction.
Dated this 29th day of April 1892.
FREDERIC PRINCE,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements connected with the Propulsion of Vessels.
We DAVID GRIFFITH DAVIES of 7 Railway Street, Fitter and Engineer and
ROBERT HUGHES of 58 Queen Street Engineman both of Bilston, Staffordshire.
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 relates to that class of propellers in which a series of floats are
attached to an endless chain such as is described in the Specification of Patent
No. 209 of 1886. In the arrangement described in this Specification it is found
that difficulty is experienced in backing the ship as the floats in such motion move
edgeways through the water and so offer no resistance.
The object of this invention is an improved construction of the floats to over-
come the above objections and which at the same time enables the floats when
propelling the vessel to be more firmly held in position.
To enable this invention to be properly understood we will proceed to describe
the same with aid of the accompanying drawings.
Figure 1. is a perspective view of our improved form of float.
Figure 2. position of same on chain while propelling vessel.
Figure 3. shows the floats folded down, in backing the vessel.
Figure 4 detached view of part of chain showing stop to hold float in position
for propelling ahead.
The float is made of the shape shown at Figure 1 the face or paddle parts
being A and A set at a slight curve: the backs of part A' is curved as shown to
form the ledge A' which is the part intended to act on the water for backing
the vessel; the ledge also acts as a firm support to hold the float vertical for
propelling forwards and also acts as a brake for the vessel when the propeller is
not working.
The floats are attached by the eyes A³ to the chain B, by the cross rod C, the
ledge A bearing upon the underside of projection B¹ of chain.

page_text: H
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is―
In the propulsion of vessels in the manner described, the improved construction
of float substantially as and for the purposes described and illustrated by the 5
accompanying drawings.
Dated this 30th day of January 1893.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, W.C., Agent for Applicants.