"Stuff Tap" in Paper Making Machinery.
Year: 1886

page_text: Date of Application, 29th Dec., 1886
Complete Left, 29th Sept., 1887
Complete Accepted, 1st Nov., 1887
"Stuff Tap" in Paper Making Machinery.
I, HENRY SCHOFIELD of Stannington near Sheffield in the County of York Paper
Works Engineer do hereby declare the nature of my said invention for IMPROVED
APPARATUS FOR AUTOMATICALLY OPENING AND CLOSING THE STUFF TAP IN PAPER
MAKING MACHINERY to be as follows
-
My invention has for its object to relieve the "Stuff Tap" in paper making
machinery, when the same gets glutted with pulp, and the flow is partially or wholly
stopped.
I am aware that certain apparatus has been constructed to give warning to the
attendant when such a stoppage has occurred, but my invention goes beyond such
means, as it does what the attendant otherwise would have to do, namely to lift the
valve to allow the accumulation to pass, and then closes it again.
It consists of a small steam Cylinder fixed over the Stuff Tap, the piston being
suitably connected with the valve of the Stuff tap, in such a manner that until
steam is admitted, the valve will always fall to its lowest adjusted position.
When steam is admitted to the cylinder the piston rises until the exhaust port is
exposed when the steam escapes through a whistle.
In front of the "Stuff tap" a pillar is fixed carrying a lover having a spoon
shaped end which is so placed as to catch the full flow of the stream of pulp as it
emerges from the stuff tap; the said lever is adjusted so that its normal position is an
inclination towards the stuff tap, but when the stream of pulp strikes against the
spoon shaped end, the lever is forced back against the supporting pillar.
This lever is connected directly or indirectly with the steam valve that admits
steam to the cylinder before mentioned, and so that when the lover is forced back by
the stream of pulp the steam valve is closed, but if the stream ceases to flow, the
lever assumes its normal position and opens the steam valve admitting steam to the
cylinder, lifting the piston and raising the stuff valve, the exhaust steam sounding
the whistle.
The moment the obstruction escapes through the enlarged opening of the raised
valve, and the lever is forced back, the steam is shut off and the piston and valve
drop to their former low position.
T
"
1000
ROBT. F. DRURY,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Automatically Opening and Closing the
"Stuff Tap" in Paper Making Machinery.
I, HENRY SCHOFIELD of Stannington near Sheffield in the County of York Paper
Works 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 :-
My invention has for its object to relieve the "Stuff Tap" in paper making
machinery when it from any cause becomes glutted and the flow of pulp is partially
or wholly stopped.
And in order that my invention may be clearly understood, I shall refer in my
Specification to the annexed sheet of drawings which illustrates an apparatus made
according to my invention.
I must first state that I am aware that an apparatus has been constructed to give
an alarm or warning to the attendant when such a stoppage has occured, but my
invention goes beyond such means, as it accomplishes what the attendant would
otherwise have to do by hand, namely to lift the valve or tap, to allow the accumu-
Intion or other obstruction to pass, and then to close it again.
It consists of a small steam Cylinder A, fixed over the stuff tap B, the piston
rod C, being connected by suitable means such as the connecting rods D, and the
adjusting screw E to the sliding valve F which opens and closes the outlet of the
stuff-tap, but in such a manner that with the aid of the weight G, the valve will
always descend to, and remain in the lowest position to which it is adjusted. The
adjustment is made by means of a hand wheel H, fixed to the screw E, but free to
turn upon the connecting rod D2.
In front of the stuff tap, a spoon shaped lever I is supported by a suitable
standard J, fixed in the stuff tank, and can vibrate upon a joint K; the spoon
shaped end is in such a position that it will catch or receive the stream of pulp L,
as it emerges from the stuff tap, and it is so adjusted that in its normal position
it inclines forward towards the stuff tap, but when the stream of pulp strikes against
it in flowing from the stuff tap, it is forced back against the stop piece M.
The top end of the lever is connected either directly or indirectly as shown, with
a Steam Valve N, in such a manner that when the lever I is forced back by the
action of the stream of pulp the valve N, is closed, but if from any cause (such as an
accumulation of pulp, or the introduction of some foreign substance) the flow is
retarded and diminished, or entirely stopped, then the spoon shaped lever I resumes
its normal position, and acting upon the steam valve N, admits steam through the
pipe O into the Cylinder A, at the same time blowing the whistle P, (or similar
alarm).
When the steam enters the Cylinder A it instantly raises the piston and its rod C,
the weight G, the connecting rods D, wheel H, screw E, and valve F, and thus allows

page_text: the obstruction to pass through into the tank; the steam escapes through a suitable
exhaust at the top of the cylinder, and the weight immediately causes the valve to
drop to its adjusted position again.
The handle Q is to enable the valve F, to be raised by hand when so required for
any purpose, and does not interfere with the automatic working of the valve.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I wish it to be understood that I do
not bind myself to the precise details of the apparatus as shown in the drawing as
they may be considerably varied without departing from the invention, but I doclare
that what I claim, is :-
1-An apparatus to automatically raise and lower the valve of the stuff tap in
paper-making machinery when an obstruction occurs, substantially as hereinbefore
described and illustrated.
2-The combination with the stuff tap of paper making machinery, of a Steam
Cylinder and suitable connections attached to the valve of the stuff tap, and which is
automatically put into action, substantially as described.
ليود
I
21
1087
ROBT. F. DRURY,
Agent for the Applicant.