Stand or Press Pipes for Charging Filter Presses.
Year: 1887

page_text: Date of Application, 27th Oct., 1887
Complete Specification Left, 27th July, 1888
Complete Specification Accepted, 14th Sept., 18
RESERVE
Stand or Press Pipes for Charging Filter Presses.
PETER BIRCHALL, Joiner, Plex Street, Tunstall, Staffre. and WILLIAM BAINBRIDGE,
Timber Merchant, Church Street, Tunstall, Staffre. do hereby declare the nature of
this invention to be as follows:-
Our invention has for its object improvements in nozzles and in the mode of con-
necting same to stand or press pipes, for charging filter presses, and consists in the
first place, of constructing said nozzles with a rectangular or other convenient shaped
flange at the top, said flange being provided with either a groove or a lip upon its
under side, which fits upon a plate of metal or other suitable material attached to
press tray, the object of said grooved or lipped flange being to retain the nozzle in its
place whilst the trays are being removed or placed in position.
To connect the before named nozzle to the stand or press pipes we employ an
expansion joint, consisting of two tubes or hollow cylinders, one of which slides in the
other, the joint being made tight by a gland and stuffing box, or other convenient
means the outer ends of said tubes or hollow cylinders being constructed to connect
to the nozzle and stand or press pipe, respectively, or to other intermediate fitting.
The principal advantages of using said expansion joint are, that by reason of the
smaller tube sliding in the larger, it forms an adjustable connection, capable of
adapting itself to the difference in thickness of the various trays, and to their con-
traction in thickness after being in use, caused by their being screwed tightly
together.
The filter presses herein referred to being formed of a series of grooved wooden
surfaces, bound together by strong wood strips which project past the grooved
surfaces to form chambers to receive the filtering medium, and the matter to be
filtered, which latter is generally forced in through nozzles inserted in apertures cut
out of the edges of the before named binding strips, and latterly through apertures

page_text: cut out of the centre of the thickness of the trays. Any convenient number of these
trays being used together, forming a press.
In constructing a new stand or press pipe for use in connection with our invention,
we prefer to cast the branches upon the bottom side in order to allow a longer
expansion joint.
Dated this 26th day of October 1887
BILLINGTON & NEWTON,
Vulcan Works, Longport,
Agents for Applicants.
improvements in Nozzles and in the Mode of Connecting same to
Stand or Press Pipes for Charging Filter Presses.
PETER BIRCHALL, Joiner, Plex Street, Tunstall, Staffre. and WILLIAM BAINBRIDGE,
Timber Merchant, Church Street, Tunstall, Staffre. 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 :-
Our invention has for its object, improvements in nozzles and in the mode of con-
necting same to stand or press pipes for charging filter presses; and our said invention
consists in the first place in constructing said nozzles with a circular, rectangular, or
other suitably shaped flange having a groove or lip upon its under side. This said
flange is at the upper end of nozzle and when said nozzle is in its position the said
flange rests upon a plate or plates of metal or other suitable material fixed to the press
trays and provided with a projecting lug or lugs which correspond and fit into the
groove in said flange. The object of said grooved flange and plates provided with
lugs, being to hold the nozzle in its place whilst the press trays are being separated
or placed together.
And secondly in the mode of connecting said nozzles to the stand or press pipe by
means of expansion joints, each consisting of two tubes or hollow cylinders one of
which slides into the other, the joint being made tight by a gland and stuffing box or
by other convenient means. The outer ends of said tubes or hollow cylinders being
formed to joint with and connect the nozzles with the branches upon stand or press
pipe or to other intermediate fitting, such as a tap. The object of said expansion
joint connecter being to compensate and adapt itself to the irregularities caused by
the wear of the press trays, and to small errors in forming the holes or gaps in said
press trays for the nozzle to pass through.

page_text: The filter presses herein referred to consist of a series of press trays: each press
tray consisting of a number of grooved wood planks bound together by strong oak
strips which project over the grooved surfaces to form chambers or spaces to receive
the filtering medium and the matter to be filtered; which latter is forced in through
nozzles placed in apertures cut out of the edge of before named oak strips.
In order to explain our invention more clearly we have appended a sheet of
explanatory drawings, and will proceed to describe same, having reference to the
letters and figures marked thereon.
Fig. 1 is a front view of our invention the stand or press pipe and a portion of the
expansion joint connector being shewn in section. Fig. 2 shews a modification of
the expansion joint connecter to suit existing stand or press pipes which generally
have branches upon both sides. Fig. 3 shews a plan of the plates with projecting
lugs. The same letters refer to similar parts in each figure.
The flange a having a groove formed in its under side to fit over the projecting
lugs bb, ou plates c c, is shewn applied to a nozzle & described in Newton's patent
No. 24381884 but it is equally applicable to the ordinary nozzles with round bodies.
e is the expansion joint connecter one end of the outer tube f being screwed into
branch on stand or press pipe h, the other end being formed into a stuffing box i
with a nut to tighten the packing. The inner tube k of said expansion joint
connecter is formed together with a tap 1, the lower part of said tap being constructed
to joint with the top of nozzle in the usual manner by turning nut m.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is―
1. The method of holding nozzles in position by constructing them with a grooved
flange fitting upon plates provided with projecting lugs, substantially as herein set
forth.
2. The mode of connecting nozzles of the class herein before mentioned, to stand
or press pipes by means of an expansion joint connecter, substantially as herein
described and illustrated.