Improvements in or relating to Wire Web Guides for Paper Machines.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Wire Web Guides for Paper Machines.
:
I, THOMAS HARVEY, Junior, Mechanical Engineer, of 36, Main Street, in the
City of Hull, in the County of Ottawa, in the Province of Quebec, Canada, 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 relates to improvements in or relating to wire web guides for
paper machines and the object of the invention is to provide a guiding mechan-
ism for the wire web of a paper machine which will be positive and instantaneous
in its action thereby preventing the wire web rubbing against what are known
as the pans which causes the edge of the wire to become frayed. My guide is so
sensitive that immediately the wire touches the pan the guide roll is moved so as
to work the wire web over to the opposite side of the machine and away from
the pan and its consists essentially of the novel arrangement and construction
of parts hereinafter described.
Figure 1, is a general perspective view of my guide connected to a paper
machine.
Figure 2 is an enlarged perspective detail of my guide separated from the
main body of the machine.
Figure 3, is an enlarged detail of the sliding block.
Figure 4, is an enlarged detail of the rock arm for supporting the dogs.
Figure 5, is a detail of the spiral gear supported on the cross shaft.
Figure 6, is an enlarged plan view of my guide with upper spiral and journal
box removed.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A, is the main frame of the machine. B, and B', are the couch rolls sup-
ported in the frame A in suitable bearings C, and C¹.
D, is the wire web supported between the couch rolls B, and B.
E, is the guide roll supported on a swivel bearing at its opposite end. This
I do not show as it is common to all paper machines using the old guides.
F, is the cross stick supported beneath the wire web D). f, are what are known
as pans held
on the stick F by suitable cleats f¹.
G. is a bracket secured to the main frame A, for supporting the guide
mechanism.,
H, is the bed of the guide mechanism. h, is an arm connected by a link h¹
to the stick F. This link his pivotally connected both to the arm h and to the.
stick F. The stick F is similarly connected to the frame at the opposite end
and is thereby capable of an oscillating motion from side to side. h2, is a
clip to which the link h¹ is directly connected so as to allow of the adjustment
on the stick F.
I, are the guide ribs and J is a block having suitable channel ways j sup:
ported on the ribs I.
which is held loosely within
K, is a bearing having a downward projection
a socket j¹.

page_text: L is a spiral gear secured to the end of the guide roll E.
is a shaft supported on suitable bearings 12 and provided with a feather key
(see Figure 5 and 6).
L' is a spiral gear loosely supported on the shaft and between the lugs
of the slidable block J and held from rotary movement by the feather key
M, is a cross shaft supported on suitable bearings m' and provided with a
thread which passes through the block J and thus provides for the longitudinal
adjustment of the same.
N, is double ratchet wheel supported on the shaft M. O, is a rock arm loosely
supported on the shaft M at o (see Figure 4). 2 are gravity dogs designed to
alternately engage with the ratchet wheel N.
.P, is a rocker similarly supported on the cross rod M to the outside of the
ratchet wheel N. The arc shaped upper portion forms a guard for the ratchet
wheel N keeping the dogs pl normally out of gear.
The rock arm is oscillated by means of a crank
to the lower portion o¹ of the rock arm.
connected by a link
The rock arm P is connected by a stiff wire q to the stick F. To enable the
wire to conform to the swaying movement of the stick and rock arm it is con-
nected to said rock arm P by means of a split collar loosely supported on a
pin q having lugs q through which the eye at the end of the link passes. By
this means the swing of the rock arm and of the stick is compensated for.
Having described the principle parts involved in my invention I shall briefly
describe the operation of the same.
It will be understood that the wire web of all paper machines has a tendency
to work over to one side or other of the machine through the couch rolls beconi-
ing slightly out of true in their bearings. This tendency is compensated for
by means of the guide roll and the accompanying mechanism.
As the wire web works over to the near side of the machine it comes in con-
tact with the pan f on the stick F, carrying it side ways by means of the pivot
link h¹.
The rock arm P connected by the wire g to the stick F is tilted so as to
carry the arc-shaped portion from beneath one of the dogs p' thereby enabling
it to engage with the ratchet wheel N and at the same time keeping the other
dog from engagement.
Through the guide roll E and the spiral gear L supported thereon and spiral
gear L the shaft is rotated and through it the crank is rotated which serves
to rock the dog supporting rocker O.
The engaged dog p¹ operates on the wheel N secured to the shaft M, and
through the thread m moves the block J laterally carrying with it this end of
the guide roll E.
The wire web now begins to move in the reverse direction until it comes in
contact with the pan at the opposite end of the stick when the reverse action
takes place.
From this description it will be seen that the work the wire web has to per-
form is reduced to a minimum it only having to tilt the rocker P on its shaft.
The remainder of the operation is performed by the guide roll E.
The guides hitherto used by not being instantaneous in action caused the
wire web to be forced against the pan with considerable force either on one
side or the other of the machine and as the web revolves it is cut and frayed
against the pan.
This frayed edge has from time to time to be removed and in the course of
about one to ten weeks has to be renewed as it becomes too narrow to support
the paper.
As these webs cost a large amount of money it will be readily seen what a
source of economy a perfectly working guide would be.
My guide by working easily and instantaneously accomplishes the desired
result.

page_text: Having particularly described and ascertained the nature of my invention, and
in what manner the same is to be performed I declare that what I claim is:-
1. In a paper making machine, the combination with the pivotally supported
guide roll, the oscillating web and stick, of a slidable journal block and mechan-
ism interposed between the stick and block whereby the position is automati-
cally adjusted as and for the purpose specified.
2. In a paper making machine, the combination with the pivotally sup-
ported guide roll, the oscillating web and stick, of a slidable journal block, a
shaft having a worm thread thereon passing through an internal thread in the
block and operating mechanism connecting the guide roll, shaft and cross stick
to automatically adjust the position of the bearing block as and for the purpose
specified.
3. In a paper making machine, the combination with the pivotally supported
guide roll, the oscillating web and cross stick, of a slidable journal block, a
shaft having a worm thread thereon passing through said block provided with
a similar thread and journalled on suitable bearings, mechanism interposed
between the guide roll and shaft to transmit the rotary motion of the guide roll
to the said shaft and means for reversing said motion of the cross shaft through
the oscillating movement of the web and stick as and for the purpose specified.
4. In a paper making machine, the combination with the pivotally supported
guide roll, the oscillating web and cross stick, of a slidable block, a shaft having
a worm thread thereon suitably journalled in the frame of the machine and
passing through the said sliding block provided with a similar thread, a square
toothed ratchet wheel secured to the end of the shaft, a dog supporting rocker
loosely supported on said shaft and provided with gravity dogs reversely set
and designed to mesh with said wheel one at a time, mechanism interposed
between said rocker and guide roll to oscillate said rocker and means for alter-
nately throwing said dogs in and out of gear as and for the purpose specified.
5. In a paper making machine, the combination with the pivotally supported
guide roll, the oscillating web and stick, of a slidable journal block, a shaft
having a worm thread thereon passing through and meshing with a similar
thread in the block, a ratchet wheel secured to the end of the shaft, a dog sup-
porting rocker loosely supported on the said shaft and provided with gravity
dogs set reversely and designed to mesh with said wheel, a cross shaft provided
with a feather connected to said rocker and designed to impart a rocking motion
thereto, a spiral gear slidably supported on said shaft, lugs formed on said
journal block and surrounding said shaft on each side of said gear, a spiral
located on the spindle of the guide roll and meshing with said gear on the cross
shaft and means for throwing said dogs alternately in and out of gear as and
for the purpose specified.
6. In a paper making machine, the combination with the pivotally supported
guide roll, oscillating web and stick, of a shaft having a worm thread thereon
passing through and meshing with a similar thread in said journal block, a
square toothed ratchet wheel secure to the end thereof a dog supporting rocker
loosely journalled on said shaft and provided with gravity dogs reversely set,
a rocker also loosely supported on said shaft and provided with an arc shaped
guard, a stiff wire connected to said rocker guard and cross stick and means
for transmitting motion from the guide roll to said dog supporting rocker as
and for the purpose specified.
T 90 dos of November 1900
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.