Improvements relating to Pressure-valves for Automatic Air Pumps.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Pressure-valves for Automatic Air Pumps.
I, JULIUS HILLENBRAND, of Mannheim (Baden), in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved pressure-valve for automatic air-pumps
and is intended 1) to serve as a pressure-valve, that is to say, to allow the air
pressed into the receiver by means of bellows or any other means, to enter but not
to escape again, 2) when the receiver or receiver-bell is filled, to close the air
entrance completely and securely from the pump, so that neither the receiver-bell
shall rise higher from the closing liquid, nor any other greater pneumatic pressure
being produced therein when the bell is filled. This device is especially intended
to be used for blowing-apparatus, which are operated automatically by the hydraulic
pressure of a water-feed.
For this purpose a small bell open at its under-part, is dipped into a water
receiver open at its upper-part, this bell moving up and down between guiding-
rollers. This up and down movement is effected by any hydraulic cylinder, which
under control of a valve is in connection with a pressure-water feed pipe. The
pressure water enters under the piston and lifts the piston, the piston rod, and thus
also the bell; when the highest position is attained the apparatus is reversed and
the bell sinks by its own weight, augmented by superposed weights, and presses the
air, which has been previously sucked in through the suction valve, through a pipe
to the second receiver, which is constructed in a similar manner to the first receiver
with a bell, but without hydraulic cylinder and without valve gear thereto. Before
the air coming from the first receiver passes under the second bell, it passes the
pressure valve constructed in a peculiar manner. A rubber valve lying on the
perforated valve seat opens as soon as the air pressure in the pipe is stronger than
above the valve, (that is to say in the second bell) and closes by itself, as soon as the
pressure conditions are inverted, for instance when the first bell is sucking. At a
distance of only a few millimeters over this rubber-valve a metal-plate is guided on
two columns and suspended on an angular lever and usually does not touch the
rubber-plate. But as soon as the second bell attains nearly its highest position,
a rod suspended from the top operates the angular lever influencing toggle jointed
arms and hereby the metal plate is pressed upon the rubber-valve-plate whereby the
passage of the air from the air-pump is closed. But in order to avoid possible
breakage of the gear the pivot of the upper toggle arm is guided on a bolt which,
yielding at a certain pressure, is pressed downwards by means of a spring. A
second swelling of the suspended rod presses the lever downwards when the
bell has nearly reached its lowest position so that the toggle jointed arms return

page_text: to their former position. The bells operating as pump and as pressure receiver can
also be replaced by other devices for instance by bellows.
Doted this 1st day of Mov 1807
I, JULIUS HILLENBRAND, of Mannheim (Baden), in the Empire of Germany,
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 an improved pressure valve for automatic air pumps
and is intended-
(1) To serve as a usual pressure valve that is to say to allow the air forced into
the receiver by means of bellows or any other means, to enter but not to escape
again,
. (2) When the receiver or receiver bell is filled, to close the air entrance
completely and securely from the pump, so that neither the receiver bell shall rise
higher from the closing liquid, nor any other greater pneumatic pressure be
produced therein, when the bell is filled. This device is especially intended to be
used for blowing apparatus, which are operated automatically by the hydraulic
pressure of a water feed.
For this purpose in the annexed drawing Fig. 1 shows a small bell G¹ open at its
under part and placed in a water receiver M open at its upper part, this bell is
arranged to move up and down between guiding rollers. This up and down
movement is effected by any hydraulic cylinder X, which under control of a valve
gear is in connection with a pressure water feed pipe. The gear which can be of
any suitable kind and which is not indicated on the drawing, is constructed in such
a manner, that the pressure enters under the piston y and lifts the piston, the
piston rod and consequently the bell G', when the highest position is attained the
apparatus is reversed and the bell sinks by its own weight, augmented by superposed
weights Z and presses the air, which has been previously sucked in through the
suction valve v¹, through the piper to the second receiver W2, which is constructed
in a similar manner to the first receiver with a bell, but without a hydraulic cylinder
or valve gear thereto. Before the air coming from the first receiver passes under
the second bell G, it passes the pressure valve ³, Fig. 1, constructed in a peculiar
manner, which is shown in Fig. 2 on a larger scale. A rubber valve plying on
the perforated valve seats (Fig 2) opens as soon as the air pressure in the pipe r
is stronger than above the valve p (that is to say in the second bell G², Fig. 1) and
closes, as soon as the pressure conditions are reversed, for instance when the first
bell G' is filling. At a distance of only a few millimeters over this rubber valve
a metal plate m is guided on the two columns s¹ and s2, Fig. 3, and suspended by
two toggle jointed arms and usually does not touch the rubber plate.
But as soon as the second bell G3 attains nearly its highest position, a rod a
suspended from the top operates by means of the collar the angular lever w
influencing the toggle jointed arms and consequently, the metal plate m is pressed
upon the rubber valve plate p, so that the passage of the air from the air pump G' is
closed. In order to avoid possible breakage of the gear (which would happen in
consequence of the great power transmission of the angular lever), the pivot of the

page_text: upper toggle arm is guided at d on a bolt 6 which is pressed downwards by means
of a spring f yielding under strong certain pressure. Only when the force pressing
upwards by the levers is greater than the tension power of the spring, the latter is
compressed. A second collar e on the suspended rod a presses the lever w
downwards when the bell G2 has nearly reached its lowest position, so that the
toggle jointed arms return to their former position. The bells G¹ and G² operating
as pump and as pressure receiver can also be replaced by other devices for instance
by bellows.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1. A pressure valve with closing device for the entering air in automatic pumps,
comprising a metal plate m, arranged over the pressure valve p and adapted to be
pressed on the valve within the bell by means of toggle gear in such a manner,
that when the bell is filled the further admission of air into the bell is prevented.
2. In the valve described under Claim 1 the arrangement of a safety device
preventing damage to the toggle gear characterized by a spring operated bolt 6
connected with the toggle gear and adapted to yield at a certain over pressure of
the lever k the toggle gear being automatically brought back into its original
position by the rod a operated by the bell when the latter sinks.
Dated this 21st day or January
HERBERT HADDAN & Co.,
Agents to Applicant,
18, Buckingham Street, Strand, London.
HERBERT HADDAN & Co.,
Agents to Applicant,
18, Buckingham Street, Strand, London.