AN IMPROVEMENT OR IMPROVEMENTS IN HYDRAULIC LIFTING JACKS
Year: 1862

page_text: LETTERS PATENT to James Tangye, of the Firm of Tangye, Brothers, and
Price, of Birmingham, in the County of Warwick, Manufacturers, for
the Invention of "AN IMPROVEMENT OR IMPROVEMENTS IN HYDRAULIC
LIFTING JACKS."
Sealed the 9th May 1862, and dated the 27th February 1862.
PROVISIONAL SPECIFICATION left by the said James Tangye at the
Office of the Commissioners of Patents, with his Petition, on the
27th February 1862.
I, JAMES TANGYE, of the Firm of Tangye, Brothers, and Price, of Bir-
mingham, in the County of Warwick, Manufacturers, do hereby declare the
nature of the said Invention for "AN IMPROVEMENT OR IMPROVEMENTS IN
HYDRAULIC LIFTING JACKS," to be as follows:-
My Invention consists of the improvement or improvements herein-after
described in constructing or arranging the parts of hydraulic lifting jacks. I
make the ram of the jack solid, the said ram being made in one pieco with or
fixed upon the foot of the jack. The cylinder works upon the said ram, rising
and falling thereupon. The reservoir containing the water or oil, or other
liquid with which the jack is worked, is fixed on the top of the cylinder. The
pump is situated within the reservoir, and the said cylinder, reservoir, and
pump rise together. The plunger of the pump is worked by a lever connected
therewith by means of a cam or excentric, or forked arm, or otherwise.
Λ

page_text: claw is made at or near the bottom of the cylinder whereby lift from the
ground can be had when required. The cylinder is provided with an ordinary
stop or letting down valve for transferring the liquid from the cylinder to the
reservoir.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Tangye in the Great Seal Patent Office on the
21st August 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
TANGYE, of the Firm of Tangye, Brothers, and Price, of Birmingham, in the
County of Warwick, Manufacturers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of February, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said James Tangye, Her special licence that I, the said James
Tangye, my executors, administrators, and assigns, or such others as I,
the said James Tangye, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain.
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVEMENT OR IMPROVEMENTS IN HYDRAULIC LIFTING JACKS," upon the
condition (amongst others) that I, the said James Tangye, my executors or
administrators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said James Tangye, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and the following
statement thereof, that is to say :-
My Invention consists of the improvement or improvements herein-after
described and illustrated in the accompanying Drawing in constructing or
arranging the parts of hydraulic lifting jacks.
Figure 1 of the accompanying Drawing represents in elevation a hydraulic

page_text: lifting jack made according to my Invention; Figure 2 represents a vertical
section of the same; and Figure 3 represents a horizontal section of the same
taken through the line 4, Figure 1. I make the ram a of the jack solid,
the said ram being made in one piece with or fixed upon the foot 6 of the
jack. The cylinder c is made of solid steel or other metal, and works upon
the said ram a, rising and falling thereon. The said cylinder has a claw dat
its bottom, whereby lift from the ground can be had when required. On the
top of the cylinder c, the reservoir e, containing the water or oil, or other
liquid with which the jack is worked is situated. The pumpf (constructed
and worked in the manner herein-after described), is situated within the
reservoir e, and the cylinder c, reservoir e, and pumpf therein rise together.
A liquid-tight joint is made between the cylinder c and ram a, by means of the
cupped packing g on the top of the said ram a, as represented in Figure 2.1
A slot a² is cut in the ram a, in which slot a key h secured to the cylinder c
by the screw i slides, the said key preventing the cylinder from turning upon
the ram when weight is applied to the said cylinder. The pumpf is screwed
into the top of the cylinder as represented; is the plunger of the pump, the
upper end of which plunger works in the hole l, in the upper end or cover of
the reservoir e. The said plunger is worked by the hand lever m fitted on
the end of the shaft or axis n. The said shaft or axis n has a tongue, cam,
or forked lever o, which tongue, cam, or forked lever works in the opening p
in the said plunger k, and by its motion therein raises or lowers the said.
plunger, and actuates the pump. The liquid from the reservoir e is conveyed
to the cylinder c so as to raise the jack, and returned from the said cylinder to
the reservoir so as to lower the jack in the following manner:-The inlet
valve 9 of the pump (see Figure 2), is fitted on a small brass seat, and the
valve case containing the said valve is screwed into the side of the pump near
the bottom of the cylinder c. The valve q is kept to its seat by the helical
spring . The outlet valve s is situated in the axis of the pump, and in a line
with the axis of the plunger k, the said valve being kept to its seat by the
helical spring t. By working the hand lever m, the plunger k is raised and
lowered in the pump through the cam or tongue o and axis n, and the liquid
from the reservoir e is forced into the cylinder c, and the said cylinder and
parts carried by it raised. On the side of the reservoir e a pin v is situated,
the object of the said pin being to limit the descent of the band lever m during
the raising of the jack. The liquid in the cylinder is returned to the reser-
voir when the jack is required to be lowered by means of the lowering valve u.
The said lowering valve is situated and works in the hollow of the plunger k,
and is kept to its seat by the downward pressure of the tongue or cam o, the

page_text: edge of the said tongue or cam pressing on the top of the said valvo so long
as the hand lever m is not depressed below the pin v on the outer side of the
cylinder e. When however it is required to lower the jack the hand lever m
is shifted on the shaft or axis n so as to clear on its descent the pin or stop v,
and be enabled to take the position represented in Figure 2. When the
lever m is brought into the last described position, the edge of the cam or
tongue o no longer presses upon the valve u, and the said valve may be raised
from its seat by pressure underneath it, and forced into, the slot o' in the end
of the cam or tongue o. At the same time the lower end of the plunger k
forces the outlet valves from off its seat, and the liquid from the cylinder c
passes through the valves s and u to the reservoir e, and thereby lowers the
jack.
Figure 4 represents in vertical section another arrangement for opening
the valves so as to lower the jack; and Figure 5 is a horizontal section of
the same taken through the line w, Figure 4. In this arrangement a third
or lowering valve, as described and represented in Figure 2, is dispensed with.
The inlet valve a and outlet valve y are arranged similarly to the valves q, s,
Figure 2, but the valve x has an elongated stem or head z, with a hole in the
centre thereof. The bottom end of the plunger 2 is contracted as represented.
On depressing the hand lever m below the stop pin vas before explained in
order to lower the jack, the contracted end of the plunger 2 passes through
the hole in the head of the valve x, and withdraws the said valve, and at
The
the same time strikes against the valve y, and forces it from its seat.
water ways of the said valves x, y, are thereby opened, and the liquid from
the cylinder returns through the said waterways to the reservoir, and thus
lowers the jack.
The arrangements of the parts of my improved jack may be applied to
presses, and for raising and pressing purposes generally.
J
The arrangement of the pump of the hydraulic jack may be applied to
hydraulic jacks of other constructions, and to hydraulic presses, and raising
machinery in general.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do not
limit myself to the details herein described and represented, as the same may
be varied without departing from the nature of my Invention; but I claim as
my Invention,
Firstly, the arrangement or combination of the parts of hydraulic lifting
jacks herein-before described and illustrated in Figures 1, 2, and 3 of the
accompanying Drawings.

page_text: Secondly, the arrangement or combination of the parts of the pumps of
hydraulic lifting jacks, herein-before described and illustrated in Figures 1,
2, and 3, of the accompanying Drawing.
Thirdly, the arrangements or combinations of the parts of the pumps of
hydraulic lifting jacks by which the lowering of the said jacks is effected,
herein-before described and illustrated in Figures 2, 4, and 5, of the accom-
panying Drawing.
In witness whereof, I, the said James Tangye, have hereunto set my
hand and seal, this Twentieth day of August, in the year of our Lord
One thousand eight hundred and sixty-two.
Witness,
GEORGE SHAW.
JAMES TANGYE. (L.s.)