Roll Grinding Machine.
Year: 1893

page_text: Date of Application, 21st Mar., 1893-Accepted, 22nd Apr., 1893
COMPLETE
SPECIFICATION.
Roll Grinding Machine.
I, CHARLES ARTHUR ALLISON, of 52 Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention (which
has been communicated to me from abroad by George Vine of 21
Avenue Anconia, Commcticut, United States of America, Manufacturer), 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 simplify and at the same time to greatly
improve the construction and operation of machines for grinding rolls. With these
ends in view I have devised the novel construction which I will now describe
referring by numbers to the accompanying drawings forming part of this
Specification in which:
Fig. 1 is a side elevation illustrating the machine in use, one end of the bed being
broken away, the mechanisms for rotating the roll that is being ground, and for
reciprocating the carriage being wholly omitted as they form no portion of my
present invention, it being contemplated that any ordinary or preferred form of
carriage operating and roll rotating mechanism be used in connection with my
improved construction.
Fig. 2 is an end elevation, the roll that is being ground being in section and
the nearest roll bearing being removed.
Fig. 3 a plan view.
Fig. 4a section on the line, in Fig. 3.
Fig. 5 an enlarged detail view showing in elevation the mechanism for adjusting
the oscillating carriers which carry the grinding wheels (the central portion of
the connecting rod being broken away) whereby the taper of the roll is
determined.
Fig. 6 a plan view corresponding therewith, and
Fig. 7 is an end elevation as seen from the left in Fig. 5 the connecting rod being
in section on the line
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1 denotes the bed, 2 the carriage the sides of which are connected by a cross
piece 3 and are provided with guides 4 adapted to reciprocate in ways 5 in the bed,
the special mechanism for reciprocating the carriage being omitted as already
stated as it forms no part of my present invention. 6 denotes the roll that is being
ground which is supported in bearings 7 at the ends of the bed. The mechanism
for imparting rotary movement to the roll is likewise omitted as it formis no portion
of my present invention. > denotes the swing rest which is adapted to reciprocate
transversely on the carriage for a purpose presently to be explained. In the
present instanee I have shown the rest as supported by rollers 9. As the special
mode in which the rest is caused to swing forms no part of my present invention I
have not deemed it necessary to illustrate other forms of making the connection.
10 denotes the grinding wheels carried by shafts 11 journaled in boxes 12 on
carriers 13, the outer cuds of which are pivoted as at 14 to blocks 15 upon slides 16
adapted to reciprocate transversely in ways 17 in the swing rest. Rotary motion is
imparted to the grinding wheel by belts not shown passing over pulleys 18 on
shafts 11. It will of course be understood that for some purposes it is required
that rolls be ground so as to have more or less convex surfaces and for other
purposes it is required that they be so ground as to have more or less concave
surfaces. In the present instance I have illustrated the machine so adjusted as to
produce a roll having a slightly convex surface as for example a paper calender
roll. In order to produce a convex surface it is necessary that the grinding wheels
should rise uniformly as the longitudinal centre of the roll moves toward them, and

page_text: fall uniformly after the centre of the roll has passed the grinding wheels and toward
the other end of the roll. To produce a concave roll the grinding wheels should be
so adjusted as to be highest at the ends of the roll and move downward as the centre
of the roll approaches the grinding wheels and move upward again uniformly after
the centre of the roll has passed the grinding wheels. It is also necessary that the
rolls should be capable of adjustment so as to grind larger or smaller sized rolls,
and that they should also be self adjusting to provide for a possible slight inaccuracy
in centering the roll. 19 denotes a curved track plate upon one side of the bed.
The track plate requires to be adjusted with great care to produce the desired
result and when once adjusted does not require to be changed in use. I have
shown the track plate as capable of being raised or lowered by means of screws 20
which turn in holders 21 and the ends of which engage the track plate near the ends
thereof. The track plate after adjustment is locked in position by set screws 22
passing through slots 23. 24 denotes a show adapted to ride upon the track plate.
This shoe is pivoted to a slide 25 adapted to move vertically in a guide 26 which is
rigidly secured to the carriage so that the shoe and slide will move forward
and backward with the carriage. 27 denotes a vertical rod the lower end of which
is provided with an eye 28 which turns on a stud 25 extending outward from
slide 25 and the upper end of which is threaded and passes through a sleeve 30
provided with an extension 31. The sleeve is locked in position on rod 27 by
nts 32 on both sides thereof. 33 is an angle bracket rigidly secured to the carriage
in which one end of a rock shaft 34 is journaled, the other end of said shaft being
journaled in a bracket 35 at the other end of that side of the carriage. 36 denotes
a crank arm which is keyed to rock shaft 34 and is provided with a slot 37. 3% is
a lever having projecting inward therefrom a stand 39 journaled in a box 40 at the
top of an upward extension 41 of bracket 31. The outer face of the immer end
of this lever is provided with dovetail ways 12 which receive a slide 43. The
outer end of the lever is provided with an eye 14 through which a pin 45 passes
loosely. The outer end of this pin is resized see Fig. 6, and passes through
extension 31 of sleeve 10, the parts being locked in place by a nut 46 engaging the
threaded outer end of the pin. The slide is shown as provided with a slot 57. A
bolt 5% passes through this slot and locks the slide in position after adjustment.
47 denotes an adjustable connecting rod one end of which is pivoted to slide 43, the
other end being adjustably connected to crank arm 36. I have shown the connection
as made by means of a holt 4s which passes through slot 37. The outer end of the
bolt is reduced and the eye of the connecting rod turns freely thereon being held in
place by a screw 49 engaging the outer end of the bolt. The connecting rod is
made in two parts both of which are threaded, one having a right and the other a
left hand thread, and engage a central mit 50 the parts being locked in position
after adjustment by set nuts "1. 52 denotes a bell crank on rock shaft 34 to one
arin of which is pivoted a connecting rod 53 which extends upward and is pivoted
to one of the carriers 13. 54 denotes a connecting rod which extends across the
bed of the machine and is pivoted to a hell crank 55 on a similar rock shaft 34 in
the opposite side of the carriage, another connecting rod 53 extending upward from
bell crank 55 to the carrier on that side of the machine. I have shown but one
connecting rod 54 although two may be used if preferred one upon each end of the
carriage and extending across to the opposite side. The opposite end of each rock
shaft is provided with a crank arm 56, see Fig 4, from which a connecting rod 53
extends upward and is pivoted to the opposite side of the corresponding carrier so
that oscillation of the rock shafts must necessarily oscillate the carriers on their
pivots 14 and impart to the grinding wheels corresponding upward or downward
movement. The movement of the grinding wheels in the present instance being
upward as they move toward the centre of the roll, and downward after the centre
of the roll has been passed. In use connecting rod 47 is always maintained at the
vertical position.
Suppose now that it is required to increase the convexity of the roll that is being
ground. Bolt 58 and screw 49 engaging the outer end of holt 48 are loosened so

page_text: as to permit slide 43 to be moved toward the left as seen in Fig. 5 and bolt 48 to
be moved toward the left in slot 37. In order that this change of convexity of the
roll may be produced quickly and without difficulty after the machine has once
been adjusted, 1 provide a suitable scale 59 upon lever 38 which indicates with
perfect accuracy the convexity of the roll. As shown in Fig. 5 the adjustment is
normal and the convexity of track plate 19 will be reproduced in the roll.
In order to provide for grinding different sized rolls I provide adjusting screws 60,
see Fig. 4, which engage correspondingly threaded projections 61 on the swing
rest, the underside of blacks 15 ingred as at 02 to receive the projections
and the screws being provided with collars 63 which are recessed into plates 64
secured to the blocks so that when the adjusting screws are rotated the slides,
carriers and grinding wheels will be moved in or out as may be required, no other
changes in adjustment being required unless the convexity of the roll is changed.
As it is desirable in order to produce the best results that connecting rods 53 should
operate in a vertical or nearly vertical position, instead of pivoting the upper ends
of said rods directly to the carriers I pivot them to plates 65 which are adapted to
be moved in or out independently of slides 16 and the carriers, and are locked to
the carriers by means of bolts 66. After the grinding wheels have been adjusted
to operate upon larger or smaller sized rolls bolts 66 are removed and plates 65
properly adjusted relatively to the carriers, so as to place connecting rods 53
in a nearly vertical position after which the plates are locked in position again by
bolts 66.
As already stated it is necessary that the grinding wheels should be self adjusting
to provide for any slight inaccuracy in centering the roli This accomplished
by placing all of the operative parts of the machine upon the part which is termed
the swing rest and providing that the swing rest shall have free transverse move-
ment which of course requires to be but very slight, said transverse movement
being wholly independent of any of the adjustinents just described. The limit of
movement of the swing rest is determined by the width of slot 67 in which rock
shaft 34 lie, see Fig. 1. It follows therefore in use that this freedom of transverse
movement of the swing rest will permit the grinding wheels to adjust themselves
to the roll that is being ground should there be for any reason a slight inaccuracy
in adjusting the roll.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. In a machine of the cluss described the combination with the reciprocating
carriage, the swing rest and the grinding wheels carried by oscillating carriers
pivotel to the swing rest, of a curved stationary track plate, a shoe engaging
said track plate and moving with the carriage, and intermediate connections
substantially as described and shown whereby the upward and downward move-
ment of the shoe upon the track plate is communicated to the carriers causing
the grinding wheels to move upward and downward as the carriage is reciprocated
in use.
2. The combination with the reciprocating carriage, of the swing rest, the
grinding wheels, oscillating carriers therefor pivoted to the swing rest, and
suitable means substantially as described and shown for raising and lowering the
carriers and grinding wheels as the carriage reciprocates.
3. The combination with the reciprocating carriage, the curved stationary track
plate and a shoe adapted to ride thereon, of the swing rest transverse slides 16
in said rest, the grinding wheels, carriers therefor pivoted to the slides, suitable
intermediate connections between the carriers and the shoe for the purpose set
forth, and suitable means for adjusting the slides and carriers in and out whereby
the machine may be adapted to operate upon different sizes of rolls.
4. The combination with the carriers, grinding wheels, the track plate and the
shoe, of rod 27, rock shafts 34, connecting rods 53 and 54, erank arm 36 upon

page_text: one of the rock shaft, lever 38 one arm of which is connected to rod 27, and
an adjustable connecting rod 47 between crank arm 36 and lever 38,
3. The combination with the rock shaft 34 having crank arm 36, and lever 38
having slide 43 and scale 59, of adjustable connecting real 47 pivoted to the slide
and adjustably connected to the crank arm, and a vertically movable rod con-
nected to the lever whereby movement is imparted to the rock shaft.
6. The combination with the grinding wheels and oscillating carriers therefor,
of vertically movi
ving connecting rods 53 and plates 65 in which said rods are
pivoted and which are adjustably connected to the carriers.
7. The swing rest having projections 61, transverse slides 16 in the swing rest,
the grinding wheels, carriers therefor pivoted to the slides, and adjusting screws 60
engaging projections 61 whereby the slides, carriers and grinding wheels may be
moved in or out independently of the swing rest.
8. The combination with the carriage, the grinding wheels, carriers therefor,
slides to which the carriers are pivoted, and a swing rest adapted to move trans-
versely to the carriage to which said slides are adjustably cured.
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9. The combination with the track plate, shoe 24 ant sie 27 which the shine
is carried, of the carriage having a suitable guide for the slide, rod 27 pivated to
the slide, the swing rest, slides 16, the grinding wheels, carriers therefor pivoted to
the slides, and suitable intermediate connections between roi 27 and the carriers
whereby the upward and downward movement of the shoe is communicated to
the carriers and grinding wheels.
10. The combination with the enrriage, the grinding wheels, the carriers and
adjustable slides to which the carriers are pivoted, of a swing rest supporting the
slides and moving upon the carriage.
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11. The combination with the grinding wheels, carriers therefor, the swing rest
and the carriage, of the track plate, the shoe, rock shafts 34 the carriage,
and intermediate connections between the shoe and the rock shafts whereby the
latter are oscillated.
12. The carriers, plates 65 adjustably secured thereto, the rock shafts and
connecting rods 53 one cud of said rods being connected to the carriers the other to
arms extending from the rock shaft, in combination with the carriage, the shoe
carried thereby, a curved track plate upon which the shoe rides, and intermediate
connections by which the vertical movements of the shoe are caused to oscillate the
rock shaft.
Datol this 21st day of March 1902
ALLISON BROS.,
Agents for the Applicant.