Year: 1885

page_text: We, JOHN GREENHALGH and JOHN HAYDOCK, both of Knott Mill, Darwen,
in the County of Lancaster, Papermakers, do hereby declare the nature of this
invention to be as follows:-
In the manufacture of paper when the pulp is leaving the stuff tap of the paper
making machine it flows into a receptacle or mixing box and is thence conveyed
by suitable means such as troughs called "sand traps" to that part of the machine
where it is subjected to the ordinary operations for conversion into paper.
The pulp is mixed in the mixing box with water in certain proportions according
to the weight of paper to be manufactured.
Sometimes the stuff-tap wholly or partially stopped up with foreign matters
such as bits of chips strings, solidified pulp &c, and thus the pulp is prevented from
flowing in its proper proportion into the receptacle or mixing box containing the
water,
Now this invention has for its object to provide means for giving an alarm in
such a case.
For this purpose we provide in front of the stuff tap a device hereinafter called
a box and which in one arrangement resembles a scoop hinged or pivotted to some
part of the apparatus and suitably connected to one arm of a lever, the other arm
of which is provided with a counterbalance. This counterbalance is adjustablec
according to the proportions required and to the consequent weight or force of the
pulp against the box. In connection with the lever means are provided for
sounding an alarm in the event of change in the proportions of the pulp.
One arrangement for this purpose comprises a whistle to which, when change in
the proportion of the pulp occurs, and the box is caused to move upon its hinge or
pivot, steam or other fluid under pressure is admitted by a valve controlled by the
box and counterbalance.
Instead of a whistle it will be evident other sound producing apparatus, as for
example, an electric bell might be used in connection with the box, lever and
counterbalance or their equivalent.
1

page_text: Making Machines.
}:
We, JOHN GREENHALGH and JOHN HAYDOCK, both of Knott Mill, "Darwen, in
the County of Lancaster, Papermakers, 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: -
i
In the manufacture of paper, when the pulp is leaving the stuff-tap, of the paper
making machine, it flows into a receptacle or mixing box and is thence conveyed
by suitable means such as troughs called "sand-traps" to that part of the machine
where it is subjected to the ordinary operations for conversion into paper. The
pulp is mixed in the mixing box with water in certain proportions according to
the weight of paper to be manufactured.
Sometimes the stuff-tap is wholly or partially stopped up with foreign matters
such as bits of chips, strings, solidified pulp &c and thus the pulp is prevented
from flowing in its proper proportion into the receptacle or mixing box containing
the water.
Now this invention has for its object to provide means for giving an alarm in
such a case.
For this purpose we provide in front of the stuff tap a device hereinafter called a
box and which in one arrangement resembles a scoop hinged or pivotted to some
part of the apparatus and suitably connected to one arm of a lever, the other arm
of which is provided with a counterbalance. This counterbalance is adjustable
according to the proportions required and to the consequent weight or force of the
pulp against the box. In connection with the lever means are provided for
pounding an alarm in the event of change in the proportions of the pulp, caused by
the impediments above referred to.
One arrangement for this purpose comprises a whistle to which, when change in
such proportion of the pulp occurs and the box is caused to move upon its hinge or
pivot, steam or other fluid under pressure is admitted by a valve controlled by the
box and counterbalance.
Instead of a whistle it will be evident other sound producing apparatus, as for
example, an electric bell might be used in connection with the box, lever and
counterbalance or their equivalent.
Referring to the accompanying sheet of drawings Fig. 1 is a front view of alarm
apparatus according to this invention, Fig. 2 is a view at right angles thereto,
Fig. 3 is a vertical section of a valve box and attached parts hereinafter, more fully
described. Fig. 4 is a sectional plan on the line A. B Fig. 2. Fig. 5 is a section of
a box or scoop on the line C. D. Fig. 2. 1 is the box or scoop into or against
which the paper pulp flows from a stuff-tap of a paper-making machine. It is
hinged or pivotted at 2 to a base-piece 3 secured to a support 4. The box or
scoop 1 is also pivotted at 5 to one end of a rod or link 6, the other end of which
is connected at 7 to one end of a lever 8. This lever is pivotted at 9 to a
bracket 10 secured to a valve box 11 which is mounted on any suitable support 12.

page_text: 13 is an adjustable counterweight on the lever 8. 14 (Fig. 1) is a cock or tap
secured to one side of the valve box for admitting steam or other motive fluid to
the valve box 11; in Fig. 2 this tap is supposed to be removed. 15 is a steam
whistle secured to the opposite side of the valve box. It is in communication with
the steam inlet by passages 16 and 17 the outlet of the latter to the whistle being
controlled by a valve 18 which is kept in its seat as shown in Fig. 3, when the
apparatus is in its normal condition, by the force of the jet of pulp against the box
or scoop 1. 19 is a set-screw for regulating the extent of the upward movement of
the lever 8. 20 is a mixing box or receptacle into which the paper pulp flows
after impinging against the box or scoop 1. The operation of the apparatus is as
follows: When the apparatus is in use, the counterweight 13 is so adjusted upon
the lever 8 that the force of the jet of paper pulp against the box or scoop 1 is a
little greater than the opposite force due to the counterweight the several parts of
the apparatus being then maintained in the respective positions shown in Figs. 1
and 2, the valve 18 closing the passage 17 and preventing the passage of steain to
the whistle. If from any cause the flow of pulp is weakened or lessened, the
counterweight13 causes the lever 8 to partially turn on its fulcrum at 9 as indicated
in the dotted lines in Fig. 2 whereupon the steam forces the valve 18 from its seat
and passes to the whistle, thus giving an alarm, and causing an attendant's
attention to be drawn to the change in the delivery of the paper pulp. It is
obvious that in lieu of the hinged or pivotted piece 1 being in the form of a box
or scoop as shewn in the drawings it may in some cases consist simply of a flat
plate hinged or pivotted in the same manner.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what
we claim is:-
1. The use in connection with a stuff-tap. of a paper making machine of an
alarm apparatus brought into action by the reduction of the force or pressure of
the stream or jet of pulp from the stuff-tap against a pivotted plate or device so
that when the pulp is prevented from flowing in its proper proportion from the
said stuff-tap an alarm will be given, substantially as herein before described.
2. In alarm apparatus used in connection with a stuff-tap of a paper making
machine the combination of a counter-balanced lever, a hinged or pivotted device
connected thereto into or against which pulp flows from the stuff-tap, and an alarm
device, the arrangement being such that when the pulp is prevented from flowing
in its proper proportion an aların will be given, substantially as hereinbefore
described.
3. The use in connection with a stuff-tap of a paper making machine of the
herein described aların apparatus substantially as and for the purpose specified.
Dati 07.1
AD 1004
JOHN
GREENHALGH.
JOHN HAYDOCK.
W. Lloyd Wise,
Applicants' Agent.