MENTS IN THE VALVES OF HYDRAULIC RAMS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said John Blake at the Office of
the Commissioners of Patents on the 20th July 1882.
JOHN BLAKE of Accrington in the County of Lancaster Engineer
MENTS IN THE VALVES OF HYDRAULIC RAMS
31
"
IMPROVE-
My invention is particularly applicable to rams known as Montgolfiers, and
consists first of an improved waste valve for hydraulic rams.
Instead of forming the valve as is usual, with a spindle attached to it, and rising
and falling in a fixed tube or socket, I employ a fixed but adjustable spindle with
a disc or washer of india-rubber or leather rising and falling on the said spindle
The said disc, to close, lifts against a grated or perforated seating, which may be flat
or convex and on opening falls upon a fixed perforated disc or collar formed on the
said spindle.
In order to regulate the stroke (or up and down movement) of the said rubber
or leather valve the spindle and fixed disc or collar is raised and lowered, by means
of a screw,
formed upon it, and turning in a corresponding screw or thread in a
vertical tube or socket supporting the said spindle. The spindle may be moved up
or down in any convenient manner.
The second part of my invention consists in an improved construction of foot or
delivery valves for hydraulic rams. For this purpose I employ a tube or chamber
having a number of holes or perforations in its shell, the said holes or perforations
being covered by a belt or ring of india-rubber or other elastic material, the said
belt or ring being kept in place by two fixed collars or rims formed on the said
tube or chamber and to give greater valve area I combine with this said belt valve,
a second valve which consists of a disc or washer of india-rubber or other suitable
material, working loosely on a tubular stud. The said rubber valve, to close,
falls upon a perforated grate or seating near the upper end of the said chamber.

page_text: On the top of the said tubular stud is a screwed cap, which may be removed for the
purpose of flushing out any dirt or sediment which may enter the chamber, without
removing the valve.
The third part of my invention consists in an improved construction of disc stop
valve to be placed on the mouth of the injection or feed pipe to hydraulic rams and
consists in the employment of a disc of leather, india-rubber or other suitable
material fixed in a round seating, having its outer edge or rim secured by means of
a gland or lid of metal forced down tightly upon it by screws; the centre of the
valve may
be fixed to the lid by a screw and washer.
The object of this improvement being to make the disc or valve of pliable
material, lift freely and equally from the metal seat upon which it rests when
losed

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Blake in the Great Seal Patent Office on the 17th January
1883.
JOHN BLAKE of Accrington in the County of Lancaster Engineer. "IMPROVE-
5MENTS IN THE VALVES OF HYDRAULIC RAMS."
"
In performing the first part of my invention I fix my improved waste valve to
the feed pipe at a point near where water enters the hydraulic ram.
Instead of forming the valve in the usual manner with a spindle attached to it
and rising and falling in a fixed tube or socket I employ a fixed but adjustable
spindle with a disc or washer of india rubber or leather rising and falling on the
said spindle. The waste valve is composed of a perforated seating (to and above
which a vertical tube is cast) secured to the frame or to the feed pipe by bolts or
otherwise. The vertical tube has a screw thread near the top and the valve spindle
passes through the tube and screws into this thread. At the foot of the spindle is
fixed a perforated metal disc or collar which supports a disc or washer of india
rubber or leather free to rise and fall on the spindle. When water is admitted
through the supply pipe the pressure lifts the india rubber disc on the spindle.
against the perforated seating and thus closes the valve: when the pressure is
removed the india rubber disc falls upon the metal disc at the foot of the spindle
and thus opens the valve.
In order to regulate the stroke (or up and down movement) of the india rubber
disc or valve, the spindle and metal disc is raised or lowered by means of the screw
already described.
A handwheel is secured to the upper end of the spindle to turn it ud a lock nut
to hold it in position bears against the upper end of the tube.
The second part of my invention consists in an improved construction of foot or
delivery valves for hydraulic rams.
In making my improved delivery valve I fix a chamber to the frame between
the feed pipe and the air vessel: the shell of this chamber is perforated with a
number of holes: these holes are covered on the outside by a belt or ring of india
rubber or other elastic material held in position by two fixed collars formed on the
chamber
To give greater valve area I combine with this belt valve a second valve: the
belt valve chamber is contracted in diameter and extended upward so as to form a
tubular stud on which a disc or washer of india rubber or other suitable inaterial
works loosely and falls on a perforated seating formed in the upper end of the
chamber round the base of the tubular stud thus closing the valve.
When the pressure of the water overcomes the resistance in the air chamber,
water flows through the holes in the shell of the chamber under the india-rubber
belt and into the air chamber; at the same time, if the pressure be sufficiently
great, water will also raise the india rubber disc of the second valve and pass into
the air chamber. The tubular stud has a screw thread formed on its exterior
surface on which a metal disc is screwed above the india rubber disc and held in
position by a lock nut. The outer edge of the metal disc is turned upward so as
to allow the india rubber disc to rise from the perforated seating.
A cap or cover is screwed on the top of the tubular stud which may be unscrewed
for the purpose of flushing out any dirt or sediment which may enter the chamber,
without displacing the valve or its cover.
0
The third part of my invention consists in an improved construction of disc
stop valve to be placed on the mouth of the injection or feed pipe to hydraulic
rains.

page_text: In performing this part of my invention I employ a disc of leather, india-rubber,
or other suitable material having its outer edge or rim secured to the valve cover
by a gland or lid of metal and forced down tightly upon the valve cover by means
of the screws which hold the gland to the cover: the disc to close the valve falls
upon a seating formed at the mouth of the feed pipe and to open, the valve is raised
by a hand lever or in any convenient manner: The centre of the disc may be fixed
to the lid by a screw and washer. The object of this improvement being to make
the disc (formed of pliable material) lift freely and equally from the metal seat
upon which it rests when closed.
Having stated the nature of my Invention and described the manner of performing
the same I would have it understood that I do not limit myself to the details given
as they may be varied or modified and
1 declare that I claim.
1-The improved waste valve for hydraulic rams consisting of a disc or washer
of india rubber or leather rising and falling on an adjustable spindle as herein
described.
2. The combination of a ring or belt of india rubber with a perforated cylindrical
chamber forming an improved foot or delivery valve to hydraulic rams as herein
described.
3. The use of a removable cap fixed at the top of the tubular stud leading from
the lower or injection chamber into the air chamber for the purpose herein
described.
4-The improved disc stop valve for the mouth of the injection or feed pipe to
hydraulic rams substantially as herein described.
In witness whereof I the said John Blake have hereunto set my hand and
seal this fifteenth day of January One thousand eight hundred and eighty
three
JOHN BLAKE (L.S.)