Improvements in Hydraulic Lifts.
Year: 1892

page_text: Date of Application, 23rd Dec., 1892
Complete Specification Left, 23rd Sept., 1893-Accepted, 28th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Lifts.
I, WILLIAM ROBERT GREEN of The Newington Iron Works, Falmouth
Road, London S.E., Engineer do hereby declare the nature of this invention to be
as follows:-
My invention relates to hydraulic lifts of the class called suspended in which the
cage is lifted by one or more chains or ropes receiving motion from the lifting ram
or rams and has for its object improvements in the method of communicating the
motion of the lifting rams to the lifting chains or ropes and in the method of
guiding the said rams.
In a former Patent granted to me, No. 5520, A.D. 1887, I described a form of
apparatus in which a single lifting cylinder is inverted so that the ram works
downwards, side rods being provided to connect the ram head with the overhead
sheaves. The object of the present invention is to apply a similar arrangement to
multiple-cylinder apparatus.
In the apparatus of my present invention the various cylinders are grouped
vertically together side by side or otherwise with their rams working downwards.
All the rams are connected to one lower crosshead coupled by two or more side
rods to the overhead multiplying sheaves. These rods pass through lugs or
guides formed with or attached to the cylinders and thus act as guides to the ram.
Dated this 22nd day of Danombor 1909
WILLM. ROBT. GREEN.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Lifts.
I, WILLIAM ROBERT GREEN of The Newington Iron Works, Falmouth
Road, London S.E. 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 relates to hydraulic lifts of the class called suspended in which the
cage is lifted by one or more chains or ropes receiving motion from the lifting ram
or rams and has for its object improvements in the method of communicating the
motion of the lifting rams to the lifting chains or ropes and in the method of guiding
the said rams.
In a former Patent granted to me, No. 5520 A.D. 1887, I described a form of
apparatus in which a single lifting cylinder is inverted so that the ram works down-
wards, side rods being provided to connect the ram head with the overhead sheaves.
The object of the present invention is to apply a similar arrangement to multiple-
cylinder apparatus.
In the apparatus of my present invention the various cylinders are grouped
vertically together side by side or otherwise with their rams working downwards.
All the rams are connected to one lower crosshead coupled by two or more
side rods to the overhead multiplying sheaves. These rods pass through lugs
or guides formed with or attached to the cylinders and thus act as guides to the
rain.
The accompanying drawing shows one manner in which I carry out my invention.
These cylinders A, A', A' are secured by their feet a to a wall or other convenient
object. They are each fitted with rams B, B', B2 working downwards through
glands and attached to a lower crosshead C common to all. Side rods D connect

page_text: this lower crosshead C with an upper crosshead E carrying two multiplying
sheaves F, F. The ropes start from a fixed point G, pass under the sheave F,
over a conveyance sheave H rotating on a stationary axis, under the sheave F',
and then away over the overhead sheave I to the lift cage J. The side rods D
which serve as guides are each in two lengths joined up by coupling nuts d which
are arranged to come in contact with lugs or guides on the upper and lower
cylinder feet a so as to form stops for limiting the travel of the ram.
I do not limit myself to the number of cylinders side-rods and sheaves used in
this combination nor the particular details of the apparatus here illustrated.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) In multiple-cylinder hydraulic lifts, placing the cylinders parallel and
inverted so that their rams work downwards on to a crosshead common to all, and
connecting this lower crosshead to an upper sheave-carrying crosshead by two or
more side rods which serve also as guides, substantially as described.
(2.) The combination of parts forming the principal parts of a lift as shown in
the accompanying drawing."
Dated this 22nd day of September 1893.
WILLM. ROBT. GREEN.