Improvements in or relating to Paddle Wheels for Steamers.
Year: 1890

page_text: Date of Application, 24th June, 1890
Complete Specification Left, 4th Feb., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Paddle Wheels for Steamers.
I, JOHN HOWARD, of 9, Darley Street, Farnworth, near Bolton, in the County
of Lancaster, Painter and Contractor, do hereby declare the nature of my said
invention to be as follows:-
This invention refers to improvements in or relating to paddle wheels for
steamers and consists of an improved form or construction of paddle, which has for
its object that of minimising friction and increasing the power of the same to
allow of steam vessels being propelled at a much greater speed than hitherto.
The paddles are constructed of inetallic materials with concaved striking surfaces
back and front to produce an equal effect when working in either direction. The
metallic plates are formed and framed together by angle irons, being secured by
rivets or their equivalents. The sides of the paddles are distanced sufficiently
apart to allow of water passing between them to minimise displacement of water,
and reduce friction and power to drive the saine. The paddles are secured to the
paddle wheel arms in any convenient manner.
Dated the 23rd June 1890.
EDMUND CHADWICK,
Agent.
COMPLETE SPECIFICATION.
Improvements in or relating to Paddle Wheels for Steamers.
I, JOHN HOWARD, of 9, Darley Street, Farnworth, near Bolton, in the County
of Lancaster, Painter and Contractor, do hereby declare the nature of my said
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 refers to improvements in or relating to paddle wheels for
steamers and consists of an improved form or construction of paddle, which has for
its object that of minimising friction and increasing the power of the same to allow
of steam vessels being propelled at a much greater speed than hitherto. The
paddles are constructed of metallic materials with concaved striking surfaces back
and front to produce an equal effect when working in either direction. The
metallic plates are formed and framed together by angle irons, being secured by
rivets or their equivalents. The sides of the paddles are distanced sufficiently
apart to allow of water passing between them to minimise displacement of water,
and reduce friction and power to drive the same. The paddles are secured to the
paddle wheel arms in any convenient manner.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation of a paddle wheel of a steamer fitted with my improved
single floats or paddles with hollow or concaved striking surfaces.
Fig. 2 is a plan of same.
Fig. 3 is a section of my improved single float or paddle with hollow or concaved
striking surface through line A' B' in Fig. 1.
Fig. 4 is a side elevation of the paddle wheel of a steamer fitted with my
improved double floats or paddles with hollow or concaved striking surfaces.
Fig. 5 is a plan of Fig. 4 showing the ends of the same jointed together.
Fig. 6 is a section of my improved double float or paddle with the ends open.

page_text: Fig. 7 is a section of another form or shape of my improved single float or
paddle with hollow or concaved striking surface.
Fig. 8 is a section of my improved double float, or paddle with hollow or
concaved striking surfaces, and jointed together by means of angle irons, and
Fig. 9 is a section of another form of my improved float or paddle with hollow
or concaved striking surface.
In all the figures the same letters are employed to indicate corresponding
parts.
A is the paddle wheel shaft or centre; B the bosses to which the rims C and
the arms D are secured in any convenient manner. The floats or paddles E are
provided with the hollow or concaved striking surfaces G, which strike the water
in such a manner as to cause the "grip" to be much firmer than that obtained by
the ordinary flat "feathering" floats or paddles, by which paddle steamers will be
propelled at a much greater speed than hitherto. The floats or paddles E are
provided with the flanges H, by which they are secured to the arms D by means of
the rivets as shown in Figs. 1 and 2, or by other equivalents such as bolts. The
floats or paddles E can be made single as shown in Figs. 1, 2, 3, 7, and 9, or double
as shown in Figs. 4, 5, 6, and 8. The double floats or paddles E are secured to the
arms Das before described the ends being solid as shown in Figs. 4 and 5, or
open as in Figs. 6 and 8. The double floats or paddles E can be constructed
without the flanges H as shown in Fig. 8, being tied together by the angle irons J,
the latter being secured to the floats or paddles E and the arms D by rivets, bolts,
or their equivalents. The floats or paddles E with hollow or concaved striking
surfaces G can be single or double as desired; the latter producing an effect that
will cause a backward motion of the paddle wheel to be as powerful as a forward
motion. This invention entirely removes or dispenses with the necessity of the
"feathering" arrangements employed in paddle wheels at present in use.
Having now particularly described and ascertained the nature of my said inven-
tion and the method of performing the same I would have it understood that I do
not confine myself to the precise details or configuration of the parts I have
shown as the same may be varied according to the class or make of paddle wheels
my invention may be applied to without departing from the principle of my inven-
tion, but what I claim is :-
Constructing the floats or paddles of paddle wheels, employed for propelling
steam vessels, with hollow or concaved striking surfaces for the purpose specified
substantially as described.
Dated the 21st January 1891
EDMUND CHADWICK,
Agent.