Improved Apparatus for Propelling Steam-vessels when Main-engines are Disabled.
Year: 1888

page_text: Date of Application, 7th Nov., 1888
Complete Specification Left, 7th Aug., 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
Improved Apparatus for Propelling Steam-vessels when Main-engines
are Disabled.
HENRY CHAPMAN DIGMAN 41 Baring Street South Shields Master Mariner and
JAMES BROWN ARCHER 12 Darnell Street Newcastle on Tyne Marine Engineer do
hereby declare the nature of this invention to be as follows:-
The objects sought to be attained by this invention, is to provide an apparatus,
easily fitted together, of small bulk, and of sufficient strength to bring a vessel into
port, in moderate weather, when her main engines are disabled.
This result is attained by having a radial wheel, easily put together, and fitted with
floats placed upon one end of a shaft which rests in permanent bearings and lies
transversely across the deck, and projects beyond the ships side, when not in use
this shaft can be drawn inboard. The other end of this shaft being connected to the
steam-winches by means of a rod or gipsy wheel and chain.
For different draughts of water the boss of the wheel may be of different diameters,
or by having a port in the vessels-side for the light draught which can be securely
closed when not in use, or the wheel may be raised and lowered by means of a wheel
and screw and driven from the shaft aforesaid by means of a connecting rod or gipsy
wheel and chain.
Dated this 6th day of November 1888
HENRY C. DIGMAN.
JAMES B. ARCHER.
COMPLETE SPECIFICATION.
Improved Apparatus for Propelling Steam Vessels when Main-engines
are Disabled.
HENRY CHAPMAN DIGMAN 42 Baring Street, South Shields Master Mariner, &
JAMES BROWN ARCHER, 12 Darnell Street, Newcastle on Tyne Marine Engineer, 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:
The object sought to be attained by this invention, is to provide an apparatus, easily
fitted together, of small bulk, and of sufficient strength to bring a vessel into port, in
moderate weather, when her main engines are disabled.
This result is attained by having a radial wheel, easily put together, and fitted with
floats, fitted upon one end of a shaft, which rests in permanent bearings and lies trans-
versely across the deck and projects beyond the ship-side, when not in use this shaft
can be drawn inboard. The other end of this shaft being connected to the steam-
winches by means of a rod or gipsy wheel and chains.
For different draughts of water the boss of the wheel may be of different diameters,
or by having a port in the ships-side for the light draught which can he closed
securely when not in use, or the wheel may be raised and lowered by means of a wheel
and screw, and driven from the shaft aforesaid by means of a connecting rod or gipsy
wheel & chain.
Fig. 1 shows side elevation of steam vessel, with wheels C in position.
Fig. 2 represents deck plan of a steam vessel showing winches A with gipsy wheel
ou drum shaft, connected to gipsy wheel on shaft B by chain D. Which shaft passes
through the stuffing box E and having the wheel C fixed on the outer end.
Fig. 3 shows section of steam vessel with wheels fixed at different draughts of
water.

page_text: The winches A being started, the motion is conveyed by the chain D to the shaft B,
and wheels C, which propells the vessel. It can be moved in either direction by
reversing the winches.
n
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare that what we
claim is,
An apparatus constructed substantially as herein described and illustrated in the
accompanying drawings.
Dated this 6th day of August 1889.
HENRY C. DIGMAN.
JAMES B. ARCHER.