Improvements in Hydraulic Lift Machinery.
Year: 1893

page_text: Date of Application, 21st Apr., 1893
io nplete Specification Left; 19th Jan., 1894-Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Lift Machinery.
I, ROBERT FALKLAND CAREY, of 43 Arlingford Road, Tulse Hill, Surrey,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction and employment of two adjoining small
ram cylinders, both as power cylinders and acting together; they are preferably fed
from separate pipes but from the same pump, or from an accumulator, the ingress
ports being coverable by a single slide valve, arrauged in such manuer, that should
there be a leakage in any part of one cylinder, or its connecting pipe, the load will
remain supported by the other cylinder. The two cylinders are of equal capacity,
and equivalent to a single larger cylinder.
In relation to my two small adjoining cylinders, the rams of which have a
crosshead, employ a mid-rod as a guide, which rod has the saddle above
containing the pulley sheaves of different diameters to let the whip ropes run free
of each other.
n
A 1802
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Robert Falkland Carey.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Lift Machinery.
I, ROBERT FALKLAND CAREY, of 43 Arlingford Road, Tulse Hill, Surrey,
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 :-
This invention relates to the construction and employment of two adjoining small
ram cylinders, or any multiple of two as power cylinders and acting together; they
are preferably fed from separate pipes but from the same pump, or water pressure
from an accumulator, the ingress ports being coverable by a single slide.valve,
arranged in such manner, that should there be a leakage in any part of one
cylinder, or its connecting pipe, the load will remain supported by the other
cylinder. The two cylinders are of equal capacity, and equivalent to a single
larger cylinder.
In relation to my two small adjoining cylinders, the rams of which have a
crosshead, I employ a mid pull rod as a guide, which rod has the saddle above
containing the pulley sheaves of different diameters to let the whip ropes run free
of each other.
My invention will be fully understood by the annexed drawings in which
Figure 1 represents a front elevation with valve and valve box in section.
Figure 2 is a side elevation of the apparatus affixed to a wall, and indicating
the narrow space occupied within the well in which the cage has up and down
travel.
Figure 3 is a detached horizontal section of the valve and valve box and
indicating the two ports open to both lead or connection pipes.
int of the valve face

page_text: A, A', are two cylinders of equal capacity fixed a slight distance apart by the
straps B, B, to the wall C. D, D, are ram pistons connected at the lower ends to
the crosshead or block E which also acts as a counterpoise (aided by saddle F, and
whip pullies G, G), for the cage, these being affixed to the pull rod H which passes
through the straps B, B, and having its lower end bolted to the block E. I, I, are
pipes affixed to the cylinders A, A', respectively and also to the separate ports I, J,
of the valve box K as more particularly seen at Figure 3.
L is a single port of the slide valve M held in place by the cover N, and having
its upper end jointed to the lever P which is fulcrumed at Q to an arm R of the
valve box K. This lever is provided with a weight S as a counterbalance to the
end T. The longer end T of the lever P is free for the attachment of a governing
chain, or rope, (not shown). U is the feed pipe from any source of pressure or
power, and V the exhaust, or outlet.
The action is as follows for the cage to be lifted;-The attendant by depressing
the end T of the lever P by his governing chain or rope raises the valve Mand
permits water to pass from U and L to J, J, and thence by the pipes I, I, to the
cylinders A, A', in which pressure is exerted on the ram pistons D, D, these with
the block E, guide rod H descend and draw down the saddle F and whip
pullies G, G, and consequently act upon the wire ropes by which the cage is held,
said action, while the valve M is so adjusted being such that the cage ascends to
the desired height and can be held suspended by moving valve to central position,
so that ports U and V are both closed. By pulling on the lever T by the
governing chain or rope to cause the valve M to open the port V as shown in
Figure 1 the water will flow from the cylinders and away by the outlet V to a tank,
or to waste, and thus lower the cage.
The speed for both the raising and lowering of the cage can be determined by
the attendant according to his action on the end T of the lever P for opening the
valve port L to a greater, or less degree.
The invention has been described as having two cylinders and rams coupled to
one central pull rod but any multiple of two cylinders and rams may be attached to
one central pull rod.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is:
1. The combination of two (or any multiple of two) parallel cylinders containing
rams acting vertically downwards on to a crosshead, to which is attached a vertical
pull rod passing up between the two cylinders and to the multiplying gear, as shown
and described.
2.. Arranging two (or any multiple of two) hydraulic cylinders with separate
pipes to separate ports of a valve box in such manner that both, or all necessary
ports can be opened or closed simultaneously by a single valye, the port of which
serves for both inlet and outlet, as set forth and substantially as shown on the
annexed drawings.
The 19th day of January 1201