Improvements in Hydraulic Hoisting Apparatus.
Year: 1896

page_text: Date of Application, 1st Jan., 1896
Complete Specification Left, 1st Sept., 1896-Accepted, 3rd Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Hoisting Apparatus.
I FREDERIC EASTMEAD of 39 Victoria Street Westminster London S. W.
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to hydraulic hoisting machines in which the travel of the
ram is multiplied by gear of the "wheel and axle" type.
This invention consists in an arrangement in which a vertical cylinder provided
with suitable fixings for attaching to foundations is closed at its lower end and has
a stuffing box formed at its upper end through which a ram passes. Brackets are
cast on the cylinder midway between the ends, in which rotates a shaft having
upon it two wheels of unequal diameter, round the larger of which, A, the winding
rope passes or is coiled. A second rope which is actuated by the ram is coiled on
the smaller wheel, B.
This invention niay be constructed in two ways.
1st. The ram head is provided with a rope guide, being in effect a segment of a
wheel. Two sets of brackets are provided one on either side of the cylinder both
sets being the same distance from the end. One of the shafts in these brackets
carries two wheels of unequal diameter, A & B, the other carries only one
wheel, B 1, similar in every respect to the smaller one, B, on the other shaft."
The two shafts are geared together by spur wheels of equal size, so that neither
can move independently of the other.
The winding rope coils or passes round the larger wheel, A, and the second, or
secondary rope coils round one of the smaller wheels, B, passes from thence over
the ram head and then coils in the opposite direction round the other small
wheel, B 1.
Instead of the one secondary rope as described passing round the rope guide on
the ram head, two may be used, separately fixed to opposite sides of the ram head,
thereby dispensing with the rope guide.
2ud. Only one set of brackets and one shaft is used. The ram head carries a
wheel which is free to revolve. A lug is provided on the cylinder on the opposite
side to the afore named brackets and to it is fixed one end of the secondary rope,
which is taken from thence over the wheel on the ram head and down to the
smaller wheel, B, on the shaft carried by the brackets cast on the cylinder.
In each case the secondary rope is so arranged that the parts on opposite sides
of the cylinder are parallel to each other and to the ram. The ram is prevented
from being forced out of the cylinder by a swelled collar on its lower end which is
too large to pass through the stuffing box, the ram being put into the cylinder from
the bottom.
Air and frost cocks are provided on the cylinder and a suitable connection to
admit the motive fluid.
The action of the apparatus is as follows:-
When the ram is forced up by the water, the secondary rope is pulled and so
uncoils off the small wheel, B, or wheels, B & B 1, thereby causing it or them, to
rotate. The larger wheel carrying the winding rope being fixed on the same shaft
as, B, is also caused to rotate, thereby winding up the load. The ratio between
the travel of the ram and the load being determined by the difference in diameter
of the wheels, A & B.

page_text: By either of the arrangements described, all stresses acting on the ram are
parallel to its axis. Guiding arrangements are thereby rendered unnecessary and
wear of the stuffing box prevented.
Dated this 31st day of December 1895.
Improvements in Hydraulic Hoisting Apparatus.
I, FREDERIC EASTMEAD of 39 Victoria Street Westminster London, S.W.
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 hydraulic hoisting machines in which the travel of the
ram is multiplied by gear of the "wheel and axle " type.
This invention consists in an arrangement in which a vertical cylinder provided
with suitable fixings for attaching to foundations is closed at its lower end and has
a stuffing box formed at its upper end through which a ram passes. Brackets are
cast on the cylinder midway between the ends, in which rotates a shaft having
upon it two wheels of unequal diameters, round the larger of which the winding
rope passes or is coiled. A second rope which is actuated by the ram is coiled on
the smaller wheel. This invention may be constructed in two ways, which I will
proceed to describe with reference to the accompanying drawings.
In Fig. 1 which shows one method of construction, A is the cylinder having on
it the two brackets E and F, C is the stuffing box, B the ram, and D the ram
head.
The ram head D is provided with a rope guide which is or may be a segment of
a wheel. The shaft G which runs in bearings formed in the bracket F carries
two wheels of unequal diameter J and L; the other shaft H which runs in
similarly formed bearings in the bracket E carries one wheel J I, similar to J.
The two shafts are geared together by spur wheels of equal size K and K 1, so
that neither can move independently of the other. The winding rope M coils or
passes round the large wheel L, and the secondary rope N coils round one of the
smaller wheels J, passes from thence over the ram head and then coils in the
opposite direction round the wheel J 1. Instead of the one secondary rope N as
shewn in Figure 1, I may employ two, separately fixed by means of tension
screws 0, 0, to opposite sides of a specially shaped ram head D as shewn in
Fig. 2.
The second form of construction is shewn in Fig. 3 which is an elevation in part
section of the apparatus. In this arrangement only one set of brackets E, and one
shaft G is used. The ram head D carries a wheel D1 which is free to revolve.
A lug P is provided on the cylinder on the opposite side to the brackets E and to
it is fixed one end of the secondary rope N by means of the tension screw O. The
rope N is taken from the screw O, over the wheel D1 and down to the smaller
wheel J on the shatt G.
In each case the secondary rope and the wheels and fixings are so arranged that
the parts of the secondary rope on opposite sides of the cylinder are parallel to
each other and to the ram.
The ram is prevented from being forced out of the cylinder by a swelled collar R
on its lower end, which collar is too large to pass through the stuffing box C. The
ram is put into the cylinder from the bottom end, by removing the cover S. Air
and frost cocks are provided at T and U and a suitable connection V to admit the
motive fluid is provided.
The action of the apparatus is as follows:-- When the ram is forced up by the

page_text: water, the secondary rope N (or ropes N, N 1) is pulled and so uncoils off the
wheel J (or wheels J, J 1) thereby causing it (or them) to rotate. The larger
wheel L, carrying the winding rope M, being fixed on the same shaft as J, is also
caused to rotate, thereby winding up the load. The lowering is performed by the
weight of the load, or of a cage or counterweight on the rope M, which, acting on
the wheel L, coils the rope N on the wheel J, (or wheels J, J 1) thereby pulling
the ram home and exhausting the water.
By either of the arrangements described, all stresses acting on the ram are
parallel to its axis. Guiding arrangements are thereby rendered unnecessary and
wear of the stuffing box prevented.
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. Hydraulic hoisting apparatus in which the travel of the ram is multiplied by
"wheel and axle " gearing substantially as set forth.
2. The combination of cylinder, ram, ram head, wheels, shafts and ropes
substantially as described and illustrated.
3. The combination of parts in a hoisting apparatus whereby all stresses acting
on the ram are parallel to its axis substantially as set forth.
4. Hoisting apparatus substantially as described and set forth and illustrated in
the accompanying drawings.
Dated this Thirty-first day of August 1896.
FREDERIC EASTMEAD.