Improvements in Ships' Steering Apparatus.
Year: 1889

page_text: Date of Application, 3rd Sept., 1889
Complete Specification Left, 24th May, 1890--Accepted, 12th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Ships' Steering Apparatus.
1 GEORGE DANIEL DAVIS, of Garford Street, Poplar, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus, or gear, for steering ships by
the aid of power; such as referred to in the specification of Letters Patent granted to
me dated February 10th 1881 No. 586.
According to my present improvements a handle wheel worked by the steersman, or
other person, is mounted conveniently on a shaft carried in bearings in the framing
and on this shaft is affixed a tooth wheel and is formed a worm on which works a
sliding guided piece serving as a pointer to indicate the position relatively of the
rudder.
This tooth wheel engages in the teeth of another tooth wheel, mounted on a parallel
shaft below that mentioned, and on this latter shaft is mounted parts for connection to
a valve for supplying each cylinder with steam for starting. Also on the lower shaft
is mounted the worm for giving the required end way motions, and another tooth
wheel which engages the teeth of a tooth wheel mounted on the end of the main shaft,
on which is mounted the main driving worm wheel, which wheel is operated by a
worm, running in an oil bath, and mounted on a cross shaft, which by a crank motion,
is driven by the engine. The main shaft is by suitable connections connected to and
so as to operate the steering device, or rudder.
By these means I am enabled to dispense with intervening parts, to mount the main
worm wheel in direct line with the hand wheel and the worm below it in a lubricating
chamber, and to economise the space occupied and to secure other advantages.
Dated the 3rd day of September 1889.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Ships' Steering Apparatus.
I GEORGE DANIEL DAVIS of Garford Street, Poplar, in the County of Middlesex,
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 :-
This invention relates to improvements in apparatus or gear for steering ships by
the aid of power such as referred to in the specification of Letters Patent granted to
me dated February 10th 1881 No. 586.
Fig. 1 is a vertical section of the apparatus.
Fig. 2 is a front view thereof.
Fig. 3 is a plan view.
a is a handle wheel worked by the steersman or other person, and this wheel is
mounted conveniently on a shaft a' carried in bearings a in the framing ; and on
this shaft a is affixed a tooth wheel c and there is also formed on the said shaft a
worm d on which works a nut d2 on which again is mounted a sliding guided piece d'
serving as a pointer to indicate the position relatively of the rudder. The nut dis
worked backwards and forwards according as rotation is given to the shaft a¹ by the
handle until it comes in contact with one of a pair of stops formed by the ends of the

page_text: bearings or casing for the worm d, whereby the rotation of the shaft a is stopped and
the engine allowed to come to rest.
The tooth wheel c engages in the teeth of another tooth wheel e mounted on a
parallel shaft below that mentioned above, and on this latter shaft f are mounted
parts for connection to a valve h for supplying each cylinder g with steam for
starting.
Also on the lower shaft is mounted the worm i for giving the required endway
motions and another tooth wheel which engages the teeth of a tooth wheel k mounted
on the end of the main shaft A on which is mounted the main driving worm wheel B,
which wheel is operated by a worm c, running in an oil bath D, formed between the
brackets 1, 1, and the bearings m, m, and mounted on a cross shaft E.which is driven
by the connecting rods n, n, connected to the piston rods g' of pistons working in the
cylinders g, and at their other ends these connecting rods n, n are connected to the
pins n', n of the discs o, o projecting eccentrically therefrom.
The main shaft A is by suitable connections, not shewn, connected to and so as
to operate the steering device or rudder in ordinary manner, such as by spur gear
screw connection or otherwise.
By these means I am enabled to dispense with intervening parts, to mount the main
worm wheel B in direct line with the hand wheel a, and the worm U below it in a
lubricating chamber D, and to economise the space occupied and to secure other
advantages.
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 :-
1. In ships' steering apparatus the arrangement or combination and use of a large
driving wheel B actuated by cranks or discs and eccentric pins or equivalent parts
with the valve gearing or steam controlling parts as that intervening gearing may be
dispensed with substantially as and for the purposes set forth.
2. In ships steering apparatus, the arrangement or combination of the main shaft A,
main driving worm wheel B, and parts for driving the same, and the tooth wheel k
with a steam steering handle wheel a and parts operated thereby to control the motions
of the engine directly, substantially as shewn and described.
3. The general arrangement or combination of parts forming ships' steering
apparatus, wherein the large driving worm wheel actuated by the engine cranks, also
drives the valve gearing or shutting off apparatus, thereby obviating the employ-
ment of intervening gearing, in manner substantially as hereinbefore described and
shewn.
Dated the 22nd day of M 1900
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.