Improvements in Jigging Machines.
Year: 1892

page_text: Date of Application, 27th Apr., 1892
Complete Specification Left, 27th Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Jigging Machines.
We, ALFRED RICHARD SENNETT, of Brentford Middlesex, Civil Engineer, and
JAMES DURIE, of 47 Hamilton Road, Brentford, Middlesex, Civil Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in jigging machines having sieves or
plungers for the purpose of separating minerals or other substances of different
specific gravities. We employ one or more flexible diaphragms or pistons in a
vessel or vessels in connection with the plunger rod or rods, or with the sieves.
The contrivance is connected to a supply of water above, or to a supply of water or
other fluid having a pressure above that of the atmosphere. By means of a valve
or valves the water is allowed to escape from the vessel. As soon as a current is
established, the valve suddenly closes, & the flow of water being thereby arrested, a
pressure is set up in the vessel, which, operating on the diaphragm or piston
produces an outward stroke of the plunger rod. The return stroke of the plunger
rod can be effected by a spring, or by making the contrivance double acting, that
is, by causing a pressure to act alternately on, either side of the diaphragm or
piston.
In another form of our invention, which may be actuated by water, steam, com-
pressed air, or other fluid, we employ a valve or valves connected to the plunger
rod or rods by suitable mechanism, which valve opens communication between the
vessel and the water supply. When the plunger rod has performed the requisite
amount of outward stroke, the valve is closed to the supply and the exhaust is
opened so as to allow the water in the vessel to escape.
The water escaping from the vessel we utilise for washing and separating the
minerals and other materials.
Dated this 27th day of March 1892.
W. H. MUNNS,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Jigging Machines.
We, ALFRED RICHARD SENNETT of Brentford Middlesex, Civil Engineer, and
JAMES DURIE, of 47 Hamilton Road, Brentford, Middlesex, Civil 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 is illustrated in the accompanying drawings, in which similar parts
are indicated by the same letters throughout.
Fig. 1 is a cross section of a jigging machine made according to our invention.
COMPLETE SPECIFICATION.
Improvements in Jigging Machines.
We, ALFRED RICHARD SENNETT of Brentford Middlesex, Civil Engineer, and
JAMES DURIE, of 47 Hamilton Road, Brentford, Middlesex, Civil 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 is illustrated in the accompanying drawings, in which similar parts
are indicated by the same letters throughout.
Fig. 1 is a cross section of a jigging machine made according to our invention.
Fig. 2 is side elevation of same.
Fig. 3 is section on a larger scale of the upper part of Fig. 1.
Fig. 4 is plan of upper part of Fig. 2.
Fig. 9. is plan of lower part of Fig. 2.
A is a vessel containing water and known as a hutch. B is plunger. C is sieve.
D is plunger rod. E is an enclosed vessel in connection with the head of water.
F is a valve casing containing valve G (preferably of the piston type). The
movement of valve Ğ is controlled by lever H with adjustable weight I. J is elastic
diaphragm connected to the plunger rod D, furnished with spring K or a balance
Aish

page_text: The enclosed vessel E being in connection with a head of water is subject to a
static pressure. The valve & being consequently forced open, a portion of the
water passes by holes O, and escapes by pipe L'. A flow of water being thus pro-
duced, the chamber E is relieved of this static pressure, the piston rod D rises,
being pressed up by the elasticity of the diaphragm J and spring K, and the
valve G closes. By the closing of valve G the flow of water in supply pipe L is
arrested, and pressure is set up in the chamber E (by the kinetic energy or momentum
of the moving volume of water) causing J to ventriculate, thereby causing the
plunger rod D and plunger B to perform an outward or downward stroke. The
pressure also acts on valve G, raising it and allowing water to escape through
holes O, as already explained. The materials are separated by virtue of their
different specific gravities. The material is fed on to the sieve C by the shoot a, and
the agitation due to the motion of the plunger (or plungers) causes the heavier
particles to descend into the hutch A, whence they are discharged as required into
the trough d, by means of valve c and lever e. The lighter material and waste
passes out through opening and shoot 6 in the usual manner.
Instead of an elastic diaphragm we sometimes use an arrangement shown in
section in Fig. 5. M is a plunger preferably provided with a stuffing box and gland
of the usual construction attached to plunger rod D aforementioned.
Instead of employing spring K to produce the return stroke of plunger B, we
sometimes use an arrangement shown in Fig. 6 in section and Fig. 7 in plan. In
this arrangement we employ two valve casings F and two valves G, communicating
one with the top and the other with the bottom of piston N. Pressure is thus
supplied alternately on opposite sides of the piston. Two supply pipes L and L'
and an escape pipe L' are provided.
We sometimes use a valve P as shown in section in Fig. 8. This valve P is
arranged to open inwards, being guided by spindle g, and provided with weights 7.
The action is as follows: The chamber E is subject to a static pressure as before,
but the valve P is weighted, so as to open against such pressure, whereby the flow
of water is established as before in the pipe L and chamber E. The pressure being
thereby relieved, the plunger rod D performs its inward stroke, and valve P is
closed by the flow of water, which, being thus arrested, sets up a pressure in the
chamber E as before, by which means the plunger rod D is caused to make its
outward stroke. The number of strokes in a given time is regulated by the
adjustment of the nuts i and weights h.
Fig. 10 shows in section an arrangement whereby the plunger can be operated by
the pressure of either water, compressed air, or steam. The water or other fluid
under pressure is admitted into chamber E by valve Q. The ventriculation of the
elastic diaphragm J produces the outward stroke of plunger rod D, to which is
attached the rod k, the movement of which operates the valve Q by means of
lever and rod m, thereby permitting the escape of the water or other fluid. The
return stroke is performed by the elasticity of the spring K, or balance weight, as
before explained.
In Fig. 11 is shown in section a modification of the hutch in which the sieve is
movable, and attached to the plunger rod D. The material passing through the
sieve S is discharged through valve q at the side of the hutch.
To regulate the stroke of the plunger B, Fig. 1, we prefer to employ nuts and
lock nuts as shown at p. p' Fig. 10.
The water escaping from pipe L' may be utilised to supply water to the hutch.
Having now particularly described and ascertained our said invention, and in what
way the same is to be performed we declare that what we claim is :
1. In a jigging machine a combination of a valve or valves with a piston or
elastic diaphragm connected with the plunger or sieve whereby the constant
pressure of a head of water is enabled to produce an intermittent stroke of the
plunger or sieve.
2. In a jigging machine the combination of valve G, and elastic diaphragm.J
"

page_text: connected with plunger rod D, and chamber E communicating with a head of water
by Land escape L', for the purpose specified substantially as described and shown
in Figs. 1, 2, 3, 4, 9, and 11.
3. The modification substantially as described and shown in Fig. 5.
4. The modification substantially as described and shown in Figs. 6 and 7.
5. The modification substantially as described and shown in Fig. 8.
6. The modification substantially as described and shown in Fig. 10.
Dated this 26th day of January 1893