IMPROVEMENTS IN HYDRAULIC ENGINES FOR ORGAN BLOWING AND OTHER PURPOSES to be as follows:
Year: 1885

page_text: other Purposes.
I HENRY BAMFORD of 16, White Lion Street Pentonville in the County of
Middlesex Engineer do hereby declare the nature of my said Invention for
"IMPROVEMENTS IN HYDRAULIC ENGINES FOR ORGAN BLOWING AND OTHER
PURPOSES to be as follows:-
"
My invention has for its object the ensuring of a smooth and easy reversal of
the stroke of hydraulic engines used for organ blowing and other purposes and the
prevention of jerking caused by the sudden opening of the ports.
And my invention consists in automatically controlling the speed, with which
the main valve of the engine passes over the ports used for the inlet and outlet of
the water to and from the cylinder, and proportioning this speed to that at which
the main piston is travelling at the time of reversal.
This is effected by means of a small slide riding on the said main valve which
by a suitable arrangement of a double lever is caused to be moved along the main
valve (and in the same direction as the inain valve will subsequently move) by a
tappet and rod actuated by the piston of the engine and at the required part of the
stroke, until sufficient water has been admitted to the pistons of the main valve to
move this main valve at the same speed as the small slide. This small slide is
kept upon the flat face of the main valve partly by a spring or other suitable
arrangement and partly by the water pressure and is thus moved with it; the
water opening remaining the same throughout the stroke of the main valve.
By means of the above described arrangement the water is caused to enter the
main valve gradually through the ports on its face which are opened by the slide
at the time of reversal.
The water passages communicating with the ports in the flat face on the main
valve over which the small slide travels are three in number. The two passages
communicating with the outside ports lead through the body of the main valve to
the pistons at the two ends by which the main valve is moved. The passage
communicating with the central port is also carried through the body of the
י כ

page_text: main valve to the space between the piston valve and piston which is always in
communication with the exhaust.
The main valve is an equilibrium valve of the piston type having two pistons
for controlling the inlet and outlet of water from the two ends of the main
cylinder and two pistons for actuating the valve.
The openings at the two ends of the small slide are so shaped as to effect a more
gradual admission of the water to the pistons of the main valve.
Improvements in Hydraulic Engines for Organ Blowing and
other Purposes.
I HENRY BAMFORD of 16, White Lion Street Pentonville 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:-
My invention has for its object the ensuring of a smooth and easy reversal of
the stroke of bydraulic engines used for organ blowing and other purposes and the
prevention of jerking caused by the sudden opening of the ports.
And my invention consists in automatically controlling the speed, with which
the main valve of the engine passes over the ports used for the inlet and outlet of
the water to and from the cylinder, and proportioning this speed to that at which
the main piston is travelling at the time of reversal.
This is effected by means of a small slide riding on the said main valve which
by a suitable arrangement of a double lever is caused to be moved along the main
valve (and in the same direction as the main valve will subsequently move) by a
tappet and rod actuated by the piston of the engine and at the required part of
the stroke, until sufficient water has been admitted to the piston of the main
valve to move this main valve at the same speed as the small slide. This small
slide is kept upon the flat face of the main valve partly by a spring or other
suitable arrangement and partly by the water pressure and is thus moved with it.;
the water opening remaining the same throughout the stroke of the main valve.

page_text: The slide F F is further provided with suitable projections or shoulders at each
end H, H¹, so formed as to serve as guides for such slide and for the purpose of
keeping it in position upon the flat face of the connecting bar B. The slide F F is
held upon the flat face of the connecting bar B (when the water pressure does not
effect this) by means of cross pins springs or by other suitable means.
The slide F F is caused to move by a double lever J provided with arms
extending down on each side of the centre of the connecting bar B, the space
between such arms being sufficient to admit of the free movement of the con-
necting bar B between the piston valves A² and A³ and of the slide F F between
the projections or shoulders H, H' of the same.
The double lever J is fitted on to a spindle shown dotted at Q fig. 2 which passes
through a stuffing box in the side of the valve box such spindle being provided
with a suitable lever K on its outer end, the said lever K being caused to inove by
means of a tappet rod N N connected with the main piston M'of the engine in the
ordinary manner.
The method in which the engine works is as follows.
On the admission of the water to the large piston M with the parts in the
positions as shown in fig. 1. it will be caused to move in the direction shown by
the arrows and will carry with it the tappet rod N, N, in the same direction, until
the tappet comes into contact with the lever K which will then be moved, and the
said lever K will then move the double lever J. The slide F F will then be moved
along the connecting bar B of the main valve by the arms of the double lever J
pressing against the shoulder or projection H' of the slide, F, F, thus moving the
slide F F at about half the pace that the piston M is travelling, owing to the
difference between the length of the lever K and the double lever J.
The proportionate difference between the levers K and J may be varied as
required.
The slide F F will continue to be moved along the flat upper surface of the
connecting bar B until sufficient water is admitted through the pear-shaped.
opening R in the slide F F and thence through the water passage C so as to move
the main valve A1 A2 A3 A4 at the same pace that the slide F F is travelling; at
the same time the water passage D being put into communication with the water
passage E by means of the cavity G in the slide F F allows the water to escape
from the piston A' into the space between the piston A¹ and the piston valve A³
and thence to the exhaust.
The slide F F during this time being partly retained in its position by the water
pressure and partly by a suitable mechanical arrangement as before mentioned, will
be now carried along with the main valve A1 A2 A3 A, the water opening through R
remaining the same and the main valve A' A² A³ A' will complete the rest of its
stroke at the same pace as that originally imparted to the slide F F by the double
lever J.
As soon as the piston valves A' and A³ pass the ports in the slide box the stroke
of the main piston M will be reversed, and also the action upon the other parts
will take place in reversed order.
If the main valve A' A² A³ A' shou'd. from any cause fail to be moved by the
water pressure admitted to it by the slide F F as above described, the double
lever J will in that case continue to move the said slide F F until the shoulder or
projection H or H', as the case may be, presses against the piston valve A² or A³,
thereby effectually starting the said main valve, which will then be moved with
such slide F F.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
First. The means whereby the speed at which the main valve A¹ A² A³ A*
moves may be automatically proportioned to the speed at which the main

page_text: piston M is moving at the time of reversal of the stroke by the arrangement for
admitting the water gradually to such main valve A1 A2 A3 A4 by means of the
slide F F in the manner and for the purpose substantially as hereinbefore
described.
And secondly. The means whereby the main valve A¹ A2 A3 A4 will be auto-
matically started (in the case of the water pressure failing to effect this) by means.
of the double lever J which causes one of the shoulders or projections of the
slide F F to be moved against one of the piston valves A2 or A³ in the manner
substantially as hereinbefore described.