IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES
Year: 1881

page_text: LETTERS PATENT to Charles Reginald Parkes, of East Ferry Road, Millwall,
in the County of Middlesex, Engineer, for an Invention of "IMPROVEMENTS
IN PORTABLE HYDRAULIC CRANES."
PROVISIONAL SPECIFICATION left by the said Charles Reginald Parkes
at the Office of the Commissioners of Patents on the 27th September 1881.
CHARLES REGINALD PARKES, of East Ferry Road, Millwall, in the County of
Middlesex, Engineer. "IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES."
This Invention consists in using the cylinders, valves, and all the working parts
of any movable hydraulic crane to serve as a counterpoise to the load to be raised,
without the aid of the usual tail jib balance, in the manner as is hereafter
described.
The construction of these cranes follows as near as possible that of the ordinary
steam portable cranes, but the bydraulic machinery will take the place of the
boiler and engine in the steam cranes and counterpoise the load to be raised.
The water under pressure is admitted by the usual telescopic pipes and con-
nections, preferably contained in the carriage of the crane, and passes up through
the centre of the column, which is, as a rule, fixed to the carriage, and is conveyed
by a swivel or other suitable connection to the valves, and thence to the working
cylinders which revolve with the jib and load. The exhaust water from the
cylinders passes through a pipe which dips into a circular tank either cast round
the column or bed plate, or separate, as preferred, and whatever the position of the
moving part, consisting of the jib cylinders, valves, etc., may be, the pipe which
moves freely in the tank will discharge the exhaust water with equal facility, and
the water can be run off from the tank by suitable means.
A second tank may be
provided to run the exhaust water into directly after leaving the valves; this tank
revolves with the moving part and may serve as an extra balance if required, or
iron weights may be added in lieu of the water tank if preferred.

page_text: The turning cylinders revolve with the moving part, and the drum to which
they are attached is a fixture.
Briefly this Invention consists:—
1st. In using the cylinders, valves, and other parts of any portable hydraulic
crane to serve wholly or in part as a balance to the jib and load to be raised,
dispensing wholly or in part with the usual clips to the rails.
2nd. The construction of this crane is made as similar as the difference in motive
power will permit to the usual portable steam cranes.
3rd. The method, as herein described, for conveying the supply water to the
machinery, and getting rid of the exhaust water; the latter is a material part of
my Invention.
4th. The turning machinery revolving with the jib, as described, and the drum
being fast to the carriage.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Reginald Parkes in the Great Seal Patent Office on the
25th March 1882.
CHARLES REGINALD PARKES, of East Ferry Road, Millwall, in the County of
Middlesex, Engineer. "IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES."
This Invention consists in using the cylinders, valves, and all the working parts
of any movable hydraulic erano to serve as a counterpoise to the load to be raised,
without the aid of the usual tail jib balance, in the manner as is hereafter
described.
The construction of these cranes follows as near as possible that of the ordinary
steam portable cranes, but the hydraulic machinery will take the place of the
boiler and engine in the steam cranes, and counterpoise the load to be raised.
The water under pressure is admitted by the usual telescopic pipes and con-
nections A, A, preferably contained in the carriage B, B, of the crane, and a pipe D
passes up through the centre of the column C, C, which is, as a rule, fixed to the
carriage B, B, and is conveyed by a swivel joint E with a gland F or other
suitable connection to the valves G of suitable construction, and thence to the
working cylinders Hand K which move round with the jib L and load. The
bearing surfaces are at the wheels V, V, and the rings W and Y. The exhaust
water from the cylinders passes through a pipe M which either dips into a circular
tank N, N, either cast round the column C or bed plate P, or separato as preferred,
and whatever the position of the moving parts, consisting of the jib L, cylinders
H, K, valves G, etc., may be, the pile M which moves freely in the tank N will
discharge the exhaust water with equal facility, and the water can be run off from
the tank N by a pipe R or other suitable means.
A second tank S, S, may be provided to run the exhaust water into directly
after leaving the valves. This tank S, S, travels on wheels and can be adjusted; it
also moves round with the moving part and may serve as an extra balance if
required, or iron weights may be added in lieu of the water tank S, S, if
preferred.
The cylinders H, K, move round with the moving part, and the drum T, T, to
which the chains are attached is a fixture to the bed plate P.
This Invention need not necessarily follow the exact details as shown in the
Drawing, and fully described herein, but briefly consists,―
First. In using the cylinders, valves, and other parts of any portable hydraulic
crane to serve wholly or in part as a balance to the jib and load to be raised,
dispensing wholly or in part with the usual clips to the rails.
Secondly. The construction of this crane is made as similar as the difference in
motive power will permit to the usual portable steam cranes.
Thirdly. The method, as herein described, for conveying the supply water to the
machinery, and getting rid of the exhaust water; the latter is a material part of
my Invention.
Fourthly. The turning machinery revolving with the jib, as described, the drum
being fast to the carriage.
In witness whereof, I, the said Charles Reginald Parkes, have hereunto set
my hand and seal, this Twenty fourth day of March, in the year of our
Lord One thousand eight hundred and eighty two.