Improvements in Reversing Engines for Steam Steering, Hoisting, and other Apparatus.
Year: 1895

page_text: Date of Application, 20th Feb., 1895
Complete Specification Left, 9th N v., 1895-Accepted, 14th Dec.,
1'89'5
PROVISIONAL SPECIFICATION.
Improvements in Reversing Engines for Steam Steering, Hoisting,
and other Apparatus.
We DAVIS AND COMPANY LIMITED of 12 Fenchurch Street, in the City of
London, and Garford Street, West India Dock Road, in the County of Middlesex,
Engineers, and WILLIAM ROBERT GARDEN HAY of the same places Director and
Manager of the said Company do hereby declare the nature of this invention to
be as follows:-
This invention is designed to facilitate simplicity of construction of the cylinder
castings and valve boxes of reversing engines for steam steering and hoisting
apparatus and other purposes as well as the prevention of undesirable shocks in the
working of such apparatus by. governing the steam.
The invention consists in the introduction of an independent passage in the valve
box for the alternate supply and exhaust of steam to the ends of the valves in the
cylinders, the action of which is as follows:-
By the movement of a controlling valve up or down or to and fro steam is
admitted by the steam controlling supply port through the cylinder supply ports, to
the centre or ends of the cylinder valve. Thus if the said controlling valve, is
moved in the one direction, steam flows through the supply port into the centre.
passage and therethrough to the port supplying the cylinder giving steam to centre
of the cylinder valve and exhausting through the end ports to the escape, pipe.
Again to reverse the motion of the engine if the controlling valve is moved in
the other direction steam is admitted by the one port in the controlling valve box
to the joining passages to the end ports of the valve box thus supplying steam to
ends of the cylinder valves and exhausting by the centre passage to the exhaust
pipe. The engine being automatically governed by shut off gear which may be of
the character described in the Specification of Letters Patent granted to George
Daniel Davis dated 10th day of February 1881 No. 586.
Dated the 20th day of February 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.
Improvements in Reversing Engines for Steam Steering, Hoisting,
and other Apparatus.
We DAVIS AND COMPANY LIMITED of 12 Fenchurch Street in the City of
London and Garford Street, West India Dock Road, in the County of Middlesex,
Engineers, and WILLIAM ROBERT GARDEN HAY of the same places Director and
Manager of the said Company, 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 is designed to facilitate simplicity of construction of the cylinder
castings and valve boxes of reversing engines for steam steering and hoisting

page_text: apparatus and other purposes as well as-the prevention of undesirable shocks in the
working of such apparatus by governing the steam.
The invention consists in the introduction of an independent passage in the valve
box for the alternate supply and exhaust of steam to the ends of the valves in the
cylinders, the action of which will be hereinafter described, reference being had to
the accompanying drawings.
12
DESCRIPTION OF THE DRAWINGS.'
Fig. 1 shows by front elevation- a reversing engine with our improvements
adapted thereto.
. 4. wad
Fig. 2 shows a side elevation of the same.
...
2
.:
Fig. 3 shows the same by a sectional side elevation drawn to a larger scale, the
section of the valve portion being taken on the line A A Fig. 4.
Fig. 4 is a cross sectional view of the cylinders and valve casing..
Fig. 5 is a sectional view taken on the line B B Fig. 4.
Fig. 6 is a sectional view taken on the line C C Fig. 4.
By the movement of a controlling valve io.up or down or to and fro steam is
admitted by the steam controlling supply ports b b through the cylinder supply.
ports to the centre or ends of the cylinder valve.
11
!
Thus if the said controlling valve o is moved to the left viewing Fig. 3 steam
flows through the supply port c¹ into the centre passage 'gland therethrough to the
port giving steam to the centre of the cylinder valve p and exhausting through
the end ports g g and c to the escape pipe at e, a is the steam inlet.
The controlling valve o is then closed again by means of the shutting off worm
wheel q and screw r.
1
To reverse the motion of the engine if the controlling valve is moved in the other
direction steam is admitted by the one port c-Fig. 5-in the controlling valve box
to the joining passages gg to the end ports h h of the valve box thus supplying
steam to ends of the cylinder valves p and exhausting by the centre passage g
through c¹ to the exhaust pipe at e.
The engine being automatically governed by shut off gear which may be of the
character described in the Specification of Letters Patent granted to George
Daniel Davis dated 10th day. of February 1881 No. 586.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
:
In a reversing engine for steam steering, hoisting and other apparatus the
construction and combination or arrangement and use of an independent passage
in the valve box for the alternate supply and exhaustion of steam, as and for the
purpose set forth.
Dated the 8th dov of Novarnhar 1805
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.