Improvou Aamaly open
Year: 1886

page_text: Improvou Aamaly open
I, ALEXANDER MELVILLE CLARK, of the Firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of
Patent Agents, do hereby declare the nature of this invention (a communication to
me from abroad by Nicholas Hermann Borgfeldt and Adolph Charles Schutz, both
of New York City, in the County and State of New York, United States of
America, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-)
The object of this invention is to supply ocean-going steamships and other vessels
with means for propelling them by steam power in case the main propelling
apparatus should break or get out of order.
The invention consists principally in combining one or more auxiliary engines,
which are adapted to be placed on deck, with one or more frames suspended from
the framing of said engines, and carrying each an auxiliary propeller and means
for revolving the same from the engine, and with fore and aft brace chains which
connect with the lower parts of said suspended frames and hold the same in
position.
Reference is to be had to the accompanying drawings forming part of this
specification, wherein
Figure 1 is a top view of part of a vessel having the improved auxiliary
propellers.
Figure 2 is a cross section of the same, on the line xx, Figure 1.
Figure 3 is a detail section on the line y y, Figure 2.
Figure 4 is a detail face view of the upper part of one of the propeller carrying
frames.

page_text: In the drawing the letter A represents the deck of a steamship or other vessel.
Upon this deck are shewn to be placed two frames B. B. each supporting one or
more cylinders C, to which steam inay be conveyed from a boiler, for the purpose
of reciprocating the piston-rod D of such cylinder.
The outer part of each frame B which overhangs the deck of the vessel A carries
a crankshaft E, the ends or gudgeons a of which extend beyond the sides of the
frame B into bearings j that project from said frame and serve as swivel supports
for a frame F, that is suspended from the bearings ; and hangs along the side of
the vessel, reaching below the water line, as is more clearly shewn in Figure 2.
In the lower part of the frame F are the bearings for a shaft G upon which an
auxiliary propeller H is loosely hung.
The shaft E carries pulleys b; and the propeller H carries pulleys d, that are
also loose on the shaft G. Over these pulleys are laid chains I, which are to
transmit rotary motion from the shaft E to the propeller H.
The frame F, it will be seen, is composed substantially of two main side pieces e e,
of which each is suspended from one of the bearings or gudgeon-blocks j, and at
the lower part these side pieces e e are united by the shaft G, which carries the
loose propeller, and which constitutes the main transverse connecting brace between
the pieces e e.
Still other connecting braces f shewn in Figures 2 and 4, may also be applied to
the side pieces é e of each frame F, for the purpose of furnishing greater strength.
The ends of the shaft G carry eyes or holders g g, to which are connected stay-
⚫ chains J and L. The stay chain J extends aft to a suitable bolt or fastening h,
and the chain L extends forward to a suitable bolt or fastening i.
Ocean-going steamships or similar vessels would be supplied with two frames B. F,
and the appurtenances heretofore specified, so that in case of the breaking of or
injury to the main propelling apparatus of such a vessel, the auxiliary apparatus
may quickly be put into operation. In such a case the frames B are fastened on
deck, with their cylinders C, and the frames F, which are carried by the shaft E
are let down over the side of the ship until they rest against her hull, and extend
beneath the water-line sufficiently far to enable the auxiliary propellers H to
operate.
The chains I when the engines are set in motion, will revolve the propellers H and
thus impart motion to the ship. The brace chains J and L hold the frames F, and
the auxiliary propellers in position.
For facilitating the connection of the frame F to the two bearings j j_that
project from the frame B, we prefer to hinge the upper part of the frame F, by
pins, to the body of said frame F and to lock this hinged portion to said body
by screws or bolts m, so that upon unfastening the screws m the said upper portion n
of the frame F may be turned on its hinge l, to be easily applied to or taken from
the bosses or bearings ; of the frame B.
By uniting the stay-chains J and L to the eyes 9 9 that are carried by the
shaft G the strain of these chains is wholly removed from the frame proper Fand
absorbed entirely by the shaft G.
Having now particularly described and ascertained the nature of the said
invention, we declare that what we claim is:—
1. The auxiliary propeller attachment to a ship, consisting of the frame B,
cylinder C, piston-rod D, crank-shaft E, suspended frame F, hanging on bearings j
of the frame B, propeller-shaft G, hung in said frame F, and brace chains and L,
that are connected with said frame F, substantially as herein shewn and described.
2. An auxiliary propeller attachment to vessels, consisting of the frame F, which
is swiveled at the upper end and loose at the lower end where it is combined with
the stay-chains J and L, substantially as herein shewn and described.

page_text: 3. The frame B, having projecting bosses or bearings j, combined with the
swiveled frame F, having hinged upper portion n, and with the locking bolts m,
substantially as herein shewn and described.
4. The frame F, suspended at its upper end from a pivoted support, and combined
at its lower part with the transverse shaft G, the ends of which are united to the
stay-chains J and L, and with the propeller H, which is loosely hung upon the
shaft G, as specified.