Improvements in or relating to the "Stuff-gates" of Paper Making Machines.
Year: 1892

page_text: Date of Application, 21st Dec., 1892
Complete Specification Left, 21st Sept., 1893-Accepted, 28th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to the "Stuff-gates" of Paper Making
Machines.
I, WILLIAM HANTON SALMON of the Firm of W. H. & J. Salmon of Dover
Road, Northfleet, Kent, Engineer, do hereby declare the nature of my said invention
to be as follows:-
My invention relates to the "stuff-gates" of paper making machines and has for
its object to provide means supplementary or auxiliary to the ordinary screw and
nut motion for opening and closing the gate whereby the gate can be set or adjusted
to any required flow of pulp by the said motion, but be opened and closed by the
auxiliary means without disturbance of said adjustment.
My invention further has for its object to provide an indicator or graduated scale
upon the screw rod so that the setting of the gate may be indicated thereon thus
affording data for use at some future time when it is desired to set the gate for the
same flow of pulp.
In accordance with my invention I employ a screw rod and hand wheel for
raising and lowering the gate as heretofore, but supplementary or auxiliary to said
rod I employ two guide rods passing through ears or projections on the gate and
working through a guide bridge attached to the valve seat through which the rod
passes. These guide rods are attached to a cross head in which the nut of the hand
wheel takes its bearing. All three rods pass loosely through the guide bridge
attached to the main casting on which the valve or gate slides and the two guiding
rods are surrounded by spiral springs between the guiding bridge and ears on the
gate aforesaid which tend always to impel the gate into the closed position. Weight
applied to the hand wheel would have the same effect as the springs..
In each of the guiding rods is formed a notch or recess into which may fit the
edge of a spring locking plate resting upon the guiding bridge.
In order to operate my improved gate the screw rod and hand wheel, guiding rods
and cross head, carrying with them the gate are lifted up bodily until the notches in the
guiding rods are reached into which the spring plate then takes and locks the gate in a
definite position. By now turning the hand wheel, which operates the screw rod,
the gate may be raised or lowered making larger or smaller the opening for the
flow of the pulp until the desired flow is obtained.
In order now to shut off the flow of pulp the spring plate which retains the guide
rods is pushed out of the notches by means of a suitable knob or handle provided
for that purpose and the gate, screw rod and cross head are lowered bodily. The
adjustment of the gate in relation to the screw rod remains unaltered and when it is
desired to restart the flow at the same rate of delivery, the gate with its
appurtenances has simply to be raised bodily till the spring plate re-enters the
notches.
To afford an indication of the amount of opening of the gate and consequently the
amount of pulp flowing to equal a given weight of paper per ream the screw rod
may be graduated and fitted with a pointer and a note having been kept of the
reading of the graduated scale it will be very easy to adjust the gate again to the
same degree of opening at any future time.
Dated this 20th day of December 1892.
JOHN G. WILSON,
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to the "Stuff-gates" of Paper Making
Machines.
I, WILLIAM HANTON SALMON of the Firm of W. H. & J. Salmon of Dover
Road, Northfleet, Kent, Engineer, do hereby declare the nature of my said 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 relates to the "stuff-gates" of paper making machines and has for
its object to provide means supplementary or auxiliary to the ordinary screw and
nut motion for opening and closing the gate whereby the gate can be set or adjusted
to any required flow of pulp by the said motion, but be opened and closed by the
auxiliary means without disturbance of said adjustment.
My invention further has for its object to provide an indicator or graduated scale
upon the screw rod so that the setting of the gate may be indicated thereon, thus
affording data for use at some future time when it is desired to set the gate for the
same flow of pulp, or liquor.
On the accompanying drawing
Fig. 1 is a front view and Fig. 2 a side view of a "stuff-gate" constructed in
accordance with my invention.
Fig. 3 is a sectional plan of Fig. 1 on line a-b and Fig. 4 is a vertical section on
line c-d.
In accordance with my invention I employ the screw rod A and hand wheel B,
for raising and lowering the gate as heretofore, but supplementary or auxiliary to
said rod, I employ two guide rods C, C passing through ears or projections D, D
on the gate E and working through a guide bridge F attached to the valve seat G
through which the rod A also passes. These guide rods are attached to a cross
head H in which the nut of the hand wheel B takes its bearing.
All three rods A, C, C pass loosely through the guide bridge F and the guide
rods C, C are surrounded by spiral springs J between the guiding bridge F and
ears D. D on the gate E which springs always tend to impel the gate into the
closed position. Weight applied to the hand-wheel B would have the same effect
as the springs.
In each of the guiding rods is formed a notch or recess K into which may fit the
edge of a locking plate L resting upon the guiding bridge F as illustrated, said
plate always tending to enter such notches under the influence of a spring M (see
Figs. 3 and 4) located in a recess N in the guide bridge F. The stuff-gate is fixed
into position by the bolt holes O as will be well understood by those conversant
with the use of the same.
In order to operate my improved gate the screw rod A and hand-wheel B, guiding
rods C, C and cross head H carrying with them the gate, are lifted bodily until the
notches K in the guiding rods are reached into which the spring plate L then takes
and locks the gate in a definite position. By now turning the haud-wheel B which
operates the screw rod A the gate may be raised or lowered, making larger or
smaller the opening P for the flow of the pulp until the desired flow is obtained.
In order now to shut off the flow of pulp or liquor the spring plate L retaining
the guide rods (which is provided with a knob O' for the purpose) is pushed out of
the notches aforesaid and the gate, screw rod, and cross head are forced down-
wards bodily by the spiral springs J. The adjustment of the gate in relation to the
screw rod remains unaltered and when it is desired to restart the flow at the
same rate of delivery, the gate with its appurtenances have simply to be raised
bodily, till the spring plate re-enters the notches.
To afford an indication of the amount of the opening P and consequently the
amount of pulp flowing to equal a given weight of paper per ream, the screw
rod A is graduated at Q and as the rod ascends the graduations become covered

page_text: by the guide bridge F which at R is formed with a "flat" to enable a reading
of the scale to be readily taken. A note being kept of the reading of the
graduated scale as uncovered by said cross head it will be very easy to adjust
the gate again to the same degree of opening at any future time.
I sometimes employ a rubber washer or ring at T to buffer the cross head
when it descends to close the gate. To afford a stop for the gate when lowered
and prevent the gate traversing too far or coming off the screw rod AI form
an enlargement U coinciding with the cut-away portion in the gate E to act as
a stop.
Having thus particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I desire it to be understood
that I do not confine myself to the precise details, relative proportions or
dimensions of the several parts, nor to the precise arrangement of the spring
plate for supporting the guide rods as these could be considerably varied without
departing from the invention but what I consider to be novel and therefore
claim is.-
.
1st. In a "stuff-gate" or liquor valve the use and application of the supple-
mentary or auxiliary attachments for opening and closing the gate without
disturbing the adjustment, substantially as hereinbefore described and illustrated
on the accompanying drawing.
2nd. In a 64
stuff-gate" the graduated or divided screw rod A for indicating
the amount of opening of the gate when mounted and operating substantially as
herein before described and illustrated on the accompanying drawing.
3rd. The gate E operated by graduated screw rod A hand-wheel B working
on a cross head H supported by notched guiding rods C controlled by spring
plate all mounted and operating substantially as and for the purposes herein-
before described and illustrated on the accompanying drawing.
Dated this 19th day of September 1893.
WILLIAM HANTON SALMON,
By John G. Wilson & Co.,
Agents.