IMPROVEMENTS IN MACHINERY FOR SURFACING OR POLISHING CYLINDERS OR ROLLS OF METAL OR OTHER MATERIAL
Year: 1879

page_text: LETTERS PATENT to William Robertson, of Jolinstone, in the County of
Renfrew, North Britain, Engineer, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR SURFACING OR POLISHING CYLINDERS OR ROLLS OF METAL
OR OTHER MATERIAL."
Sealed the 4th June 1880, and dated the 9th December 1879.
PROVISIONAL SPECIFICATION left by the said William Robertson at the
Office of the Commissioners of Patents on the 9th December 1879.
WILLIAM ROBERTSON, of Johnstone, in the County of Renfrew, North Britain,
Engineer. "IMPROVEMENTS IN MACHINERY FOR SURFACING OR POLISHING
CYLINDERS OR ROLLS OF METAL OR OTHER MATERIAL."
This Invention has for its object the construction of improved machinery for
surfacing or polishing cylinders or rolls of metal or other material in an accurato
manner.
In the improved machinery two grinding wheels of emery or other suitable
material are arranged to operate simultaneously on diametrically opposite parts of
the cylinder or roll to be surfaced or polished, and which is held between stationary
centres and is free to rotate under the action of the grinding wheels. The two
grinding wheels are mounted on a carriage with screw adjusting details for setting
them accurately at the proper distance apart in each case, and this carriage is moved
along by a screw shaft parallel to the cylinder or roll as the work proceeds, tho
grinding wheels being driven by means of pairs of pulleys on their spindles acted
on by belts passing over guide pulleys on the carriage and driven by means of a
cylinder or drum situated above the machine.
The accuracy of the work depends upon the proper guiding of the carriage as it
progresses longitudinally, and this guiding is effected by means of the following
arrangement: The carriage is upon a saddle or slide fitted to slide longitudinally
upon guide surfaces formed on the bed frame of the machine, the carriage being
jointed to the saddle so as to be capable of a rocking or angular motion about a
longitudinal axis, which is by preference situated below the position of the roll that
is to be operated on. The rocking movement of the carriage is accurately regulated
or directed by means of a block adjustably fixed to it and bearing on or against a
guide roll or bar supported on brackets cast on the bed frame, and this guide roll
or bar can be adjusted in position by means of wedges or screws, or both, and may
be made of various shapes to suit different forms of the cylinders or rolls that have
to be operated on.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Robertson in the Great Seal Patent Office on the 7th June
1880.
WILLIAM ROBERTSON, of Johnstone, in the County of Renfrew, North Britain,
Engineer. IMPROVEMENTS IN MACHINERY FOR SURFACING OR POLISHING
"
CYLINDERS OR ROLLS OF METAL OR OTHER MATERIAL."
My said Invention has for its object the construction of improved machinery for
surfacing or polishing cylinders or rolls of metal or other material in an accurato
manner.
In my improved machinery two grinding wheels of emery or other suitable
inaterial are arranged to operate simultaneously on diametrically opposite parts of
the cylinder or roll to be surfaced or polished, and which is held between stationary
centres and is free to rotate under the action of the grinding wheels. The two
grinding wheels are mounted on a carriage with screw adjusting details for setting
them accurately at the proper distance apart in each case, and this carriage is moved
along by a screw shaft parallel to the cylinder or roll as the work proceods, the
grinding wheels being driven by means of pairs of pulleys on their spindles acted
on by belts passing over guide pulleys on the carriage and driven by means of a
cylinder or drum situated above the machine.
The accuracy of the work depends upon the proper guiding of the carriage as it
progresses longitudinally, and this guiding is effected by means of the following
arrangement, which constitutes the distinguishing feature of my Invention :-The
carriage is upon a saddle or slide, to which it is jointed so as to be capable of a
rocking or angular motion about a longitudinal axis, which is by preference situated
below the position of the roll that is to be operated on. The rocking movement of
the carriage is accurately regulated or directed by means of a block or roller attached
or connected to it, and bearing on or against a guide roll or bar supported on
brackets cast on the bed frame, and this guide roll or bar can be adjusted in position
and may be made of various shapes to suit different forms of the cylinders or rolls
that have to be operated on.
And in order that my said Invention and the manner of performing the same inay
be properly understood I hereunto append a Sheet of explanatory Drawings, to be
hereinafter referred to, and representing a surfacing or polishing machine as made
with my improvements. In these Drawings the same reference numerals are used
to mark the same or like parts wherever they are repeated.
Figures 1 and 2 on the accompanying Sheet of Drawings are transverse and
longitudinal vertical sections of the machine. A cylinder or roll 3 is shown in
Figure 1 as in position for being operated on; it is held in the ordinary way
between centres upon headstocks, which are not shown in the Drawings. The
cmory wheels 4, which act on diametrically opposite sides of the roll 3, are carried
upon slides 5 which are transversely adjustable by means of screw spindles 6 on
horizontal guides upon opposite sides of a carriage 7. This carriage 7 rests or
partly rests on a slide or saddle 8 fitted to move horizontally and longitudinally in
V-guides 9 upon a massive bed frame 10, and the carriage 7 is connected to the
saddle S by a joint having a longitudinal pin 11 and allowing the carriage to rock
or move angularly to a limited extent. The extent of this angular movement can
be fixed by means of adjusting screws 12 tapped up through projecting lugs or
flanges on the saddle 8, or these screws may be screwed far enough up to prevent
all angular motion of the carriage 7 when this may be found desirable. At onc
side of the carriage 7 and on the underside of its laterally projecting part there is
fixed a block 13 fitted with an antifriction roller which rests on a guide bar 14
placed on brackets 15 formed on the side of the bed frame 10. This guide bar 14,
or a roll or round bar which may be substituted for it, as indicated by dotted lines,

page_text: serves to determine the angular position of the carriage 7 as it is gradually moved
along by the action of a longitudinal screw shaft 22 arranged in the ordinary way
and acting on the saddlo S.
Each emery wheel 4 is driven by means of two small pulleys 16 on its spindle,
there being a pulley on each side of the wheel. The driving power is communicated
from a longitudinal cylinder or drum situated above the machine, but not shown in
the Drawing, the two driving belts 17 from such overhead drum passing down to
and under the two pulleys 16 of one emery wheel 4, next up to and over pulleys 18
carried by two brackets 19 fixed upon the carriage 7, then down to and under the
pulleys 16 of the other emery wheel 4, and finally up again to the overhead drum.
The pulleys 18 upon the carriage brackets 19 run upon studs 20, which can be
adjusted in slots in the brackets by means of screw spindles having handwheels 21
for the purpose of tightening the driving belts 17.
Having thus particularly described my said Invention, and the manner of per-
forming the saine, I have to state that I do not restrict myself to the precise details
herein described or delineated, but that what I believo to be novel and original and
claim as the Invention secured to me by and in terms of the hereinbefore in part
recited Letters Patent is,-
1. The arranging or combining together of the parts of machinery for surfacing
or polishing cylinders or rolls of metal or other material, substantially in the
improved manner hereinbefore described.
2. The connecting of the carriage 7 to the saddle S, so as to be angularly movable
about a longitudinal axis, and the controlling of the angular movement by means of
the stationary guide bar 14, or equivalent, substantially as and for the purposes
bercinbefore described.
In witness whereof, I, the said William Robertson, have hereunto set my
hand and seal, this Fourth day of June, in the year of our Lord One
thousand eight hundred and eighty.
0 Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
WILLIAM ROBERTSON. (L.S.)