Improvements in Hydraulic Luts.
Year: 1899

page_text: Date of Application, 28th Jan., 1899
Complete Specification Left, 28th Oct., 1899 -Accepted, 9th Dec., 1899
Improvements in Hydraulic Luts.
We, WILLIAM HENRY CRANSTONE and CHARLES FREDERICK ARCHER, both of
High Street, Hemel Hempstead, in the County of Hertford, Engineers, do hereby
declare the nature of our said invention to be as follows:-
This invention relates to the construction of multiple-power long-stroke jigger
lifts, known as water savers.
Our invention differs from others now in commercial use, insomuch that it.
automatically adjusts itself to the required power to deal with varying loads,
before pressure water is admitted through the starting valves, or into the cylinders:
The automatic controller is worked direct by the constant pressure of the
main; connection to which is made by an equilibrium walking pipe. Any
number of powers can be fed by the one walking pipe. No water is taken from or
returned to the main by the walking pipe.
There is no delay in starting the lift whilst extra powers are being applied,
or waste of water through superflous powers being cut out. No pilot valves are
necessary.
According to our invention we use fixed hollow rams of different diameters
at their upper and lower portions, the cylinders with stuffing boxes at both ends
sliding on the rams; water is admitted through the hollow rams, thus obviating
the usual unsightly pipe connections. The automatic controller travels with
the cylinders.
The multiplying sheaves are carried in a sling crosshead attached to piston
rods connected to valves in the automatic controller.
The crosshead has at its lower end a rocking beam or beams, to which are
connected the several piston rods of the valves, which rise and fall according
to the resistance against them.
No exhaust water passes through the passages or ports of the automatic con-
troller this being arranged for by extra ports in the starting valve, or by lifting
the back pressure valves, between the cylinders and exhaust tank. These back
pressure valves are necessary to prevent vacuum in the high power cylinders
when only a light load is being dealt with.
Dated 26th January 1899.
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents for the Applicants.
Improvements in Hydraulic Lifts.
We, WILLIAM HENRY CRANSTONE and CHARLES FREDERICK ARCHER, both of
High Street, Hemel Hempstead, in the County of Hertford, Engineers, do hereby
declare the nature of our said invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to the construction of multiple-power long-stroke jigger
lifts, known as water savers.
Our invention differs from others now in commercial use, insomuch that it
automatically adjusts itself to the required power to deal with varying loads,
before pressure water is admitted through the starting valves, or into the cylinders.
[Price 8d1

page_text: The automatic controller is worked direct by the constant pressure of the
main; connection to which is made by an equilibrium walking pipe. Any
number of powers can be fed by the one walking pipe. No water is taken from or
returned to the main by the walking pipe.
There is no delay in starting the lift whilst extra powers are being applied,
or waste of water through superflous powers being cut out. No pilot valves are
necessary.
According to our invention we use fixed hollow rams of different diameters
at their upper and lower portions, the cylinders with stuffing boxes at both ends
sliding on the rams; water is admitted through the hollow rams, thus obviating
the usual unsightly pipe connections. The automatic controller travels with
the cylinders.
The multiplying sheaves are carried in a sling crosshead attached to piston
rods connected to valves in the automatic controller.
The crosshead has at its lower end a rocking beam or beams, to which are
connected the several piston rods of the valves, which rise and fall according
to the resistance against them.
No exhaust water passes through the passages or ports of the automatic con-
troller this being arranged for by extra ports in the starting valve, or by lifting
the back-pressure valves, between the cylinders and exhaust tank. These back
pressure valves are necessary to prevent vacuum in the high power cylinders
when only a light load is being dealt with.
And in order that our said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings in which similar
figures of reference indicate corresponding parts.
Fig. is an elevation illustrating our invention applied to a two-cylinder lift.
Fig. 2 is an enlarged sectional elevation of the cylinders, valves and passages.
Fig. 3 is a sectional elevation showing another arrangement of valve, and the
connections with the cross-head.
Fig. 4 illustrates the arrangement of a three-power lift.
Fig. 5 is an elevation showing another arrangement of our invention.
Referring to Figs. 1 and 2:6 is the sling cross-head and 7, 7, are the multi-
plying sheaves. 8 is the equilibrium walking pipe. 9, 9, are the fixed rams.
10, 10, are the cylinders, having stuffing boxes 11 at both ends. 12 is the
connection from the main to the walking pipe 8. The pipe is in two parts, the
pipe 8 being fixed, and the walking pipe 8 surrounding the fixed portion and
sliding thereon with the cylinders. Stuffing boxes 8b are fitted at each end of the
pipe 8, and a perforation is made in the pipe 8" to amit water to the walking
portion 8. The junction pipe 13 conveys water from the pipe 8 to the automatic
controlling valve 14, at the constant pressure of the main; the water from the
walking pipe 8 passes to the annulus 26 above the valve 14 exerting a pressure
approximately equal to that of one power. Should the load exceed the lifting
capacity of one power the valve 14 is lifted by the pull rod 24 thus allowing the
water to flow into the other power cylinder through the passages 17 and 18.
The fixed rams 9 are of two different diameters externally, the upper portions
being larger than the lower, and are formed hollow to admit water to the cylinders
through perforations 15; the connection with the accumulator being shown in
Fig. 1 at 16.
In Fig. 3 a modification of Fig. 2 is shown in which a piston valve 19 is used
for automatically controlling the passage of the water from one cylinder to the
other. In the position shown in Fig. 3 the valve ports are closed and the water
under pressure is confined to one of the cylinders. On the lifting of the valve 19
by the pull rod 24 overcoming the resistance of the pressure in the annulus 20
the water finds access to the other cylinder through the perforations in the valve
leading to a chamber (shown by dotted lines) and the passages 17, 18. Other
forms of valves may be employed instead of those illustrated.
In Fig. 4 three cylinders are shown grouped together, two automatic valves

page_text: being required actuated by a sling crosshead 22 pivoted at 23, the pull rods 24
being pivoted to the sling crosshead at 25.
When the lead is too heavy for one cylinder the valve having the less resistance
or annulus is lifted by its pull rod thereby allowing the water to flow into the
second cylinder, the sling crosshead assuming a diagonal position accordingly.
Should the load still be too much the other valve lifts and places the third cylinder.
in connection with the others, whereby all the cylinders are acted upon by the
pressure water.
Similarly any suitable number of cylinders may be brought into use, the pull
rods being connected to the crosshead by links or other mechanical device to
attain the desired lifting of the valves independently.
Referring to Fig. 5-10 is a cylinder. 9 is the upper end of the fixed ram,
of rather smaller diameter than the cylinder 10. 9 is the lower part of the ram,
of smaller diameter than the upper part and hollow. The cylinder is fitted with
stuffing boxes at each end. 20, 20, are rods attached to the cylinder 10, and to
the crosshead 6, and sliding through a fixed guide block 21. Water pressure is
admitted through the ram as described with reference to Figs. 2 and 3.
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 :-
1. In hydraulic multiple-power lifts, the application and use of an automatic
controller attached to and travelling with the moving cylinders or rams, con-
sisting of an intermediate valve or valves, balanced by the direct constant pressure
of the main conveyed through a walking pipe or by other suitable means, said
valve or valves being attached to the end or ends of the pull rod or pull rods,
substantially as and for the purposes described.
2. In hydraulic lifts, the combination with fixed hollow rams each formed with
two different external diameters as described and shown, of an equivalent number
of cylinders adapted to surround and slide on said rams, a controller attached
to said cylinders provided with a suitable number of balanced valves, and the
means described for tripping said valves one at a time according to the power
required, arranged and operating substantially as described and illustrated by
the drawings.
3. In hydraulic multiple-power lifts, the combination therewith of an
equilibrium pipe fixed to the moving portion, said pipe sliding upon a fixed
pipe in connection with the hydraulic main, and arranged,
and operating to balance the controlling valves, substantially as herein described
and illustrated by the drawings.
con nected
4. In hydraulic multiple-power lifts, the pivoted crosshead and means described
for causing one valve to be lifted at a time by reason of their different resistances.
substantially as set forth.
5. A single power hydraulic lift consisting of a fixed hollow ram formed with
two different external diameters, a cylinder (provided with stuffing boxes at each
end) sliding upon said ram, a pair of rods connected to said cylinder and to the
crosshead, pressure water being admitted to said cylinder through the hollow
ram and the whole arranged and operating substantially as described and illus-
trated by Fig. 5 of the drawings.
1
1
1000
WILLIAM HENRY CRANSTONE,
CHARLES FREDERICK ARCHER,
By George Downing & Sons,
Chartered Patent Agents, 8, Quality Court, London, W.C.