IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES
Year: 1879

page_text: LETTERS PATENT to Charles Reginald Parks, of East Ferry Road Engineering
Works, Millwall, for the Invention of "IMPROVEMENTS IN PORTABLE HYDRAULIC
CRANES."
Sealed the 14th October 1879, and dated the 16th April 1879.
"
PROVISIONAL SPECIFICATION left by the said Charles Reginald Parkes at
the Office of the Commissioners of Patents on the 16th April 1879.
CHARLES REGINALD PARKES, of East Ferry Road Engineering Works, Millwall.
'IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES."
This Invention consists in the box or pedestal travelling on wheels, and instead
of the crane post to which the jib is fixed being inside the pedestal it is placed on
the outside, and revolves in brackets, one being placed at the upper end of the
pedestal and one at the lower, and the jib is fastened to the crane post near this
bracket. The cylinders for lifting may be fixed inside the pedestal on the opposite
side to serve as a counterweight to the weight of the jib and the goods being
lifted.
The chain working up through the pillar and over sheaves where required, and
the jib, may also be provided with luffing gear, a chain for which can also pass up
through the pillar or crane post. This is an important feature in my Invention.
The levers for the man to work the crane may be on the top of the pedestal, so
that he can see all round.
The crane may also be provided with travelling gear for being worked or moved
along.

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
16th October 1879.
CHARLES REGINALD PARKES, of East Ferry Road Engineering Works, Millwall.
IMPROVEMENTS IN PORTABLE HYDRAULIC CRANES."
This Invention consists in the box or pedestal travelling on wheels, and instead of
the crane post to which the jib is fixed being inside the pedestal it is placed on the
outside, and revolves in brackets, one being placed at the upper end of the pedestal
and one at the lower, and the jib is fastened to the crane post near the lower
bracket. The cylinders for lifting are preferably fixed inside the pedestal on the
opposite side to that to which the jib is attached to serve as a counterweight to the
weight of the jib and the goods being lifted. The chain working up through the
pillar and over sheaves where required, and the jib, may also be provided with
luffing gear, a chain for which can also pass up through the pillar or crane post.
This is an important feature in my Invention.
The levers for the man to work the crane may be on the top of the pedestal, so
that he can see all round. The crane may also be provided with travelling gear
for being worked or moved along.
--
The Invention will be clearly understood by reference to the annexed Drawings
Figure 1 representing a side view, and Figure 2 an end view of my improved
portable hydraulic crane.
A is the box or pedestal travelling on wheels B, B; C is the crane post which
revolves in the brackets D, E; F is the jib; G, G', are the lifting cylinders,
chains H, H¹, from which pass over the pulleys I at the base of the pedestal and
thence over the pulleys J at the top of the crane post from which they pass over the
pulley J at the outer end of the jib as usual. The cylinder G¹ acting upon the
chain K performs the luffing. For slewing the jib the top of the crane post is
provided with a horizontal wheel L, over which pass the chains M from the
hydraulic cylinders N.
Having now described the nature of my said Invention, and in what manner
the same is to be performed, I declare that I claim,-
The improvements in portable hydraulic cranes hereinbefore described, and
substantially as shown in the annexed Drawings.
In witness whereof, I, the said Charles Reginald Parkes, have hereunto set
my hand and seal, this Fourteenth day of October, One thousand eight
hundred and seventy nine.
DADI T
CHARLES REGINALD PARKES (L.S.)