Year: 1893

page_text: Date of Application, 3rd Jan., 1893-Accepted, 18th Mar., 1893
Fig. 5 is a section on line z- Fig. 1, drawn to a smaller scale.
Fig. 6 is an enlarged elevation of the automatic reversing device for the feed
mechanism.
Fig. 7 is a section through the drive shaft of the reversing mechanism showing
the actuating arms in elevation, being the position shown in dotted lines in
Fig. 6.
My invention is especially intended to be used in truing rolls employed in roller
mills by grinding the same.
A is the supporting frame for the operating parts of the machine which may be
of any suitable construction. At opposite ends it is provided with extensions B B¹
in which are secured the head and tail blocks C C respectively. The tail block
slidingly engages in a guide way in the upper face of the extension B and is
provided on its under side with a worm gear C2 with which a worm wheel C³ on the
shaft C engages, a suitable hand wheel C on the shaft forming a means for
adjusting the tail block to and from the head block; the head and tail blocks are
provided with the usual centers.
The side bars A¹ of the frame are provided with longitudinal slots A². D is the
cross-bar extending between the two side bars of the frame and supported thereon
at its ends.
D' are clamping bolts which pass through the ends of the cross-bars and
through slots A in the side bars for clamping the cross-bar in any of its adjusted
positions.
E is a box or bearing upon the cross-bar D and substantially in line with the
centers of the head and tail blocks. This box has any suitable means of lateral
and vertical adjustment, so that its bearing may be arranged in line with the
centers. In Fig. 5 I have shown one means of accomplishing this adjustment,
consisting of the bed plate a having an inclined upper face upon which rests the
lower half 6 of the box or bearing, having a correspondingly inclined face.
The bearing b is adjusted up and down the incline on the bed-plate a by means
of a set screw c. The bed plate may be adjusted laterally upon the cross-bar and
clamped in its adjusted position by means of the clamping bolts & passing through
a slot in the cross-bar and clamping the two halves of the box together as well as
clamping the bearing in its adjusted position.
F is the roll to be ground, which has the usual shaft F¹ extending from both
ends. G is a box having the same. horizontal and vertical adjustment, as the
27

page_text: box E but located on the end bar of the frame substantially in line with the
centers.
Gis the drive pulley for the roll, having secured to or formed integral therewith
the cone pulleys G2.
To secure the roll in position to be operated upon the operator removes the
upper half of the boxes E and G and adjusts the cross bar D in such position that
when the roll is in the machine its shaft will have a bearing at both ends in close
proximity to the end of the roll. The operator then secures upon the end of the
shaft F the drive pulley G', places the roll in position with its shafts in the
bearings and its end in the centers of the head and tail blocks. The tops of
the boxes E and G are then secured in position and motion may be imparted to the
roll by belting upon the pulley G¹.
H are backing rollers bearing on the rear face of the roll F and supported in
brackets H have lateral and longitudinal adjustment in relation to the roll.
I is the grinding wheel having a collar I' sleeved upon the shaft J arranged
transversely of the machine. The shaft is provided with a spline J and the
collar is provided with a corresponding key way in which said spline engages.
This shaft is journaled in the blocks K at each end which slidingly engage with
the guides K.
Lare cross-bars secured to the blocks K extending parallel with the end bars of
the frame and slidingly engaging in bearings L' at the end thereof. The bars I,
blocks K and shaft J form substantially a three sided frame, adjustable to and from
the roll F by means of the screw shafts M, at each end, engaging suitable screw
threaded bearings in the blocks and journaled in suitable boxes M' at the side of the
machine. These screw shafts are provided with bevel gear wheels M², which in
turn mesh with the bevel pinions N upon the shaft Ni journaled in transverse
bearings N2 at the side of the machine, a hand wheel O being provided for rotating
the shaft N¹, thereby imparting motion to the screw shafts to adjust the three sided
frame and with it the grinding wheel to or from the roll F. The shaft J is
provided with a drive pulley O¹ to which motion may be imparted from any suitable
source of power.
It is necessary that a feed device be provided with a grinding wheel which will
feed it gradually across the roll, it being maintained meantime in its adjusted
position in relation to the roll. This feed mechanism I preferably construct as
follows:
P is a screw-shaft journaled in bearings in the sliding frame. P' is a block
suitably secured thereto to engage that shaft and having the arms P² engaging in
grooves in the collar I of the grinding wheel so that when longitudinal motion is
imparted to the block P¹ the grinding wheel will be correspondingly moved. The
screw shaft P is provided at its end with a beveled gear wheel Q, which is adapted
to mesh with one of the two opposite beveled gear pinions R R', which are
connected together by the sleeve R2 slidingly secured upon the drive shaft S, having
a spline and key way engagement therewith, so that the rotation of the shaft will
impart motion to the pinions.
The upper end of this shaft is journaled in the yoke S₁ which is apertured to
allow the shaft P to pass therethrough, the aperture being of such size and shape
as to allow of the longitudinal movement of the yoke upon the shaft. The yoke is
provided with a circular flange Q¹ eccentrically arranged in relation to the shaft P.
In this circular flange the eccentric T engages, being journaled upon the shaft: P.
This eccentric is provided with an arm T₁ upon which is adjustably secured a
weight. T².
U is an actuating lever for the crank journaled upon the shaft P and provided
with a head U' having pins U2 at each end upon opposite sides of the arm T¹.
V is a bell crank lever pivoted on the three-sided frame and engaging at one end
with the upper end of the lever U. The other end of this bell crank lever is
connected to the tripping rod V₁ slidingly engaging through a bearing V2 in the
block P¹ and is provided with adjustable tripping blocks V³ at each end. The

page_text: lower end of the shaft S is journaled in the pivoted bearing W. and is provided
with a gear wheel W meshing with the pinion W2 upon the transverse shaft W³
which is driven by belt connections from the cone pulleys G³.
The parts being thus constructed their operation is as follows: The roll being
secured in position as previously described and the grinding wheel adjusted in
proper position in relation to the roll as previously described and motion being
imparted to the roll and grinding wheel in opposite directions, it is evident, (the
parts of the feeding mechanism being previously adjusted) that the rotation of
the shaft S will impart a rotary motion to the screw shaft P and feed the grinding
wheel longitudinally across the face of the roll. As it nears the end of its move-
ment the bearing V2 will strike the tripping block V' and rock the bell crank
lever V which in turn will move the lever Ŭ turning it upon its pivot until one of
the pins U strikes the arm T¹ and rocks that arm from its normal position beyond
the vertical position.
As soon as it reaches this point the weight will throw the arm downward to the
limit of its movement, rotating the eccentric T which will reciprocate the yoke S¹
and cause the sleeve R² to slide along its shaft engaging the pinion of the opposite
end of the sleeve thereby reversing the motion of the shaft P ; when the
block P¹ has reached the other end of its travel the motion will again be reversed
in the same manner.
Thus it will be seen that notwithstanding the fact that the frame which carries
the grinding wheel is laterally adjusted, the driving mechanism for the feed shaft
is provided with means to compensate for. that adjustment, whereby the drive
mechanism is always in engagement with the shaft, regardless of the adjustment of
the frame which carries it.
I preferably lock the hand wheel O against accidental displacement or from
being moved by the jarring of the machine by forming a ratchet wheel on said
hand wheel and a pawl on the frame engaging therewith not shown in drawings.
The pawl acts to prevent the turning of the shaft to allow the withdrawal of the
grinding wheel from the roll.
I also preferably arrange a pan i below the wheel to contain water in which the
lower face of the roll dips.
The machine which I have described is especially adapted for the use of the
miller himself and is made portable so that it may be moved to any desired part of
the mill where power can be obtained to drive the machinery.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is:
1. In a machine for truing rolls, the combination of the frame, the head and
tail block, the boxes at each end, having vertical and lateral adjustment, and a
drive pulley adapted to be secured to the shaft of the roll, substantially as
described.
2. In a machine for truing rolls, the combination of the frame, the tail and head
blocks, the cross-bar having the adjustable box thereon, the complementary
adjustable box on the frame, and the drive pulley adapted to be secured upon the
shaft of the roll, substantially as described.
3. In a machine for truing rolls, the combination of the frame, the head and tail
blocks the cross bar extending across the frame, and adjustable thereon, the
adjustable box thereon, the complementary adjustable box on the frame, the drive
pulley adapted to be secured upon the shaft of the roll and the adjustable backing
rolls H, substantially as described.
4. In a machine for grinding rolls, the combination of the frame the roll shaft
journaled in bearings therein, the drive pulleys on said shaft, a grinding wheel, and
a feed device for said grinding wheel driven from the roll shaft, substantially as
described.
-
5. In a machine for truing rolls, the combination of the frame, the roll shaft

page_text: journaled in. bearings therein, the grinding wheel, a driven shaft on which said
wheel slidingly engages, a laterally adjustable frame in which said shaft is journaled,
and a feed device for the grinding wheel comprising a screw shaft journaled in the
grinding wheel frame, and mechanism for driving said screw shaft from the roll shaft,
substantially as described.
:
6. In a machine for truing rolls, the combination of the frame, the roll shaft
journaled in bearings therein, the grinding wheel, a driven shaft on which said wheel
slidingly engages, a laterally adjustable frame in which said shaft is journaled, a
feed device for the grinding wheel comprising a screw shaft journaled in the
grinding wheel frame, and automatically reversing feed mechanism for said screw
shaft, substantially as described.
7. In a machine for truing rolls, the combination with the bearings in the frame,
the roll shaft journaled therein, the means for driving said roll shaft, the driven
grinding wheel, the feed mechanism for said grinding wheel driven 'from the roll
shaft and comprising the shaft W³ having bevel gear thereon, the shaft S, journaled
in a pivoted bearing and having a bevel pinion meshing with the gear on the shaft W³,
the sleeve R2 keyed on the shaft S, and sliding thereon, the yoke S¹ embracing
the sleeve and forming the bearing for the upper end of the shaft S, the bevel gear
wheels R R¹, on the sleeve, the bevel pinion Q, the screw shaft P on which said
pinion is secured, the flanged bearing Q¹ on the yoke, the eccentric T engaging
therein, the weighted arm T' on said eccentric, the actuating lever U having heads
or pins U² on opposite sides of the arm T¹, the bell crank lever V, tripper rod V¹,
tripper blocks V and the block Pl.adapted to strike said blocks and engaging the
grinding wheel, substantially as described.
8. In a machine for truing rolls, the combination of the frame, the bearing for
the roll shaft, the grinding wheel journaled in an adjustable frame, the feed shaft
for said grinding wheel also journaled in said frame and a driving mechanism for
said driving shaft having means for automatically compensating for the adjustment
of the shaft, substantially as described.
9. In a machine for truing rolls, the combination of the frame, the bearing for
the roll shaft, the grinding wheel journaled in the adjustable frame, the feed shaft
for said grinding wheel journaled in said frame, a gear wheel on the end of said
'feed shaft, a sliding sleeve carrying opposing gear wheels, either of which is adapted
to be thrown into engagement with the gear wheel on the feed shaft and a pivoted
driving shaft for said sleeve slidingly engaging with the drive shaft, substantially
as described.
Dated this 17th day of Sentember 1892