IMPROVEMENTS IN PULP-SCREENING MACHINERY
Year: 1885

page_text: COMILEIM
DELCIFICATION
I, FRANK XAVER BLACK, of the City of Hamilton, in the County of Butler, and
State of Ohio, United States of America, Engineer, do hereby declare the nature of
my invention for "IMPROVEMENTS IN PULP-SCREENING MACHINERY," 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 machinery for screening the pulp which goes to the
paper-making machine in the process of manufacturing paper from pulp.
I illustrate my invention in the accompanying drawing, in which:-
Fig. 1 is a side elevation of a pulp-screening machine, a portion being broken
away to exhibit the vats in section.
Fig. 2 a front elevation of the machine.
Fig. 3 a vertical longitudinal section through one of the eccentrics.
Fig. 4 a vertical transverse section through one of the eccentrics.
Fig. 5 a plan of one of the eccentrics.
Fig. 6 a front elevation of one of the oil-guards and Fig. 7 a front elevation of
the shaft with the core-shifting devices. Figs. 3, 4, and 5 are upon an enlarged
scale as referred to the other figures.
In the drawing A indicates a vat supported at the top of framework and
provided with an outlet, nozzle through which the screened pulp stuff may flow to
the paper machine.
B, indicates a vat arranged to vibrate vertically within the first mentioned vat,
the vibrating vat being provided with a horizontal partition or floor formed of
slotted or perforated screen-plates.
C, indicates vertical reciprocating yokes disposed one at each side of the machine.
The vibrating vat rests upon and is supported by and vibrates with these yokes,
and the yokes themselves vibrate vertically in guide-pieces attached to the
framing.
D, indicates a shaft disposed across the machine and journalled in boxes sup-
ported by the framing, the shaft being provided with a pulley by which rotary
motion may be transmitted to it, and with a fly-wheel for steadying the motion.
E, indicates two eccentrics attached to the shaft, one in the line of each of the
yokes.
.
.
F, are the eccentric rods reaching from the eccentric straps upward to wrist
connection with the vales

page_text: G, indicates oil-guards in the form of cylindrical vessels cast with the boxes of
the shaft, the vessel completely surrounding the eccentrics and serving to contain
a.quantity of oil into which the eccentric may dip, and become thereby properly
lubricated. The cover of the oil-guard is made in separate pieces so that they may
be removed and the interior of the vessel be inspected.
There is a funnel at each vessel through which the oil may be poured, and one
end of each oil-guard is provided with an opening in its upper portion through
which the shifting levers operate.
H, represents a lever mechanism operated by a screw, the levers being fulcrumed
in the oil-guards.
I, represents oblique cylindrical cores fitted to slide upon the shaft to which
they are splined, the periphery of these cores fitting within the oblique cylindrical
bores of the eccentrics, the two cores' being simultaneously adjusted end wise by
means of the lever mechanism.
J, represents a collar secured to the shaft, one at each eccentric, these collars
each having a guide-way transverse to the shaft. On each guide-way fits a slide
at the end of the eccentric.
The pulp to be screened is in a substantially liquid form and is flowed into the
vibrating vat B whence it is strained downward into the vat A. The vat B is
constantly vibrated by the obvious action of the eccentrics whereby the screening
action is improved.
The stroke of the eccentrics may be varied to suit the character of pulp being
screened. The adjustment of the stroke is effected by shifting the cores, marked I,
end wise. This shifting of the cores causes the eccentrics to shift transversely.
Both eccentrics may be adjusted at once while the machine is running. The
eccentric straps may, if desired, completely surround the eccentrics, though a top
bearing alone is sufficient. The eccentric strap, instead of bearing directly upon
the eccentrics, may, if desired, be armed with anti-friction wheels bearing upon
the eccentric.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
A pulp-screening machine composed of a vertically vibrating screening-vat
disposed within a lower vat and supported upon vertically-guided reciprocating
yokes actuated by eccentrics adapted to slide across the shaft and have their stroke
adjusted by the longitudinal adjustment of oblique cylindrical cores sliding upon
the shaft and fitting within the eccentrics, the shifting mechanism of the two cores
being connected for the simultaneous actuation of both cores.
ديد
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CTY 1007