AN IMPROVED MACHINE FOR CUTTING, GRINDING, AND POLISHING SHEETS OR PLATES OF GLASS
Year: 1882

page_text: LETTERS PATENT to William Robert Lake of the firm of Haseltine Lake
and Co, Patent Agents, Southampton Buildings, Loudon for an Invention of
"AN IMPROVED MACHINE FOR CUTTING, GRINDING, AND POLISHING SHEETS OR
PLATES OF GLASS A communication to him from abroad by Henri Thivollet,
of Lyons France Crystal Cutter
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 8th September 1882.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co., Patent Agents
Southampton Buildings London "AN IMPROVED MACHINE FOR CUTTING, GRINDING
AND POLISHING SHEETS OR PLATES OF GLASS [A communication to him from
abroad by Henri Thivollet, of Lyons, France, Crystal Cutter.]
"
This invention relates to an improved machinef or cutting, grinding and polishing
sheets or plates of glass.
According to the said invention I provide a long support capable of being
oscillated, at will, upon two frames or standards; this oscillation is obtained by
means of levers fixed to the said support at each end. Through the centre of this
support passes the driving shaft which is made with a screw thread extending the
whole of the length between the said frames or standards. On the said shaft is
fitted a carriage carrying a grindstone and capable of being moved horizontally
along the whole length of the said support between the frames; this movement is
effected by means of the screw-thread upon the said shaft, and a nut fixed to the
carriage; the said carriage is caused to move in one direction or the other by
means of two pulleys and two driving belts, one of which is crossed. I also provide
a vertical shaft to which the said grindstone is secured and to which rotary motion
is imparted in the following manner, that is to say, a pinion is fixed upon, and
actuated by, the horizontal shaft, and transmits motion to a short horizontal shaft
[Price G/1

page_text: by a gear-wheel; the movement of the said short shaft is transmitted to the vertical
shaft by means of two bevel wheels. The vertical shaft is suspended at its upper
part by a lever upon which an adjustable weight is placed; this weight can be
moved to give the grindstone more or less pressure upon the glass according to the
work to be done. The inclination of the grindstone necessary for the cutting of
the glass is obtained by means of the aforesaid levers; when the required inclination
has been obtained the two levers are fixed firmly to slides by means of screws and
thumb nuts.
According to the dimensions of the glass to be operated upon, an automatic
disengaging or disconnecting gear changes the working of the carrier; when the
grindstone is at the end of its course, a rod fixed to the said carrier comes against
a slide or link fixed by means of a set-screw to a bar extending the whole length of
the machine; this bar, by means of a lever, causes the belts to be moved, one from
a fixed pulley on to a loose one, and the other from the said loose pulley on to a
fixed one.
A hopper fixed to the said carrier serves for the distribution of the
ingredients necessary in the operation. A table or dressing plate upon which are
placed the pieces to be cut, polished, and finished, is capable of oscillation upon a
shaft fixed upon two standards which have levelling and adjusting screws for
regulating, not only the level of the glass, but also the extent of bevel it is desired
to obtain. A raising or lifting screw is placed at the back of the said table in order
to give it more or less obliquity as desired. The whole table is movable and
travels upon rails, thus permitting it to be moved forward independently of the tool;
this mechanism is designed for the polishing, and in this case the tool is retained
vertical.
In carrying out the operations of cutting, polishing, and finishing the glass upon
this machine I employ grindstones and wheels of iron, emery of different degrees of
fineness, sandstone, glass, tin and lead mixed, wood of different kinds, felt, cloth, or the
like; and as ingredients I employ Fontainebleau sand and sandstone, emery in
powder, of different degrees of fineness, ground pumice stone, or other suitable
material. In order to permit the passage of the ingredients I employ grindstones
or wheels having apertures.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
5th March 1883.
WILLIAM ROBERT LAKE of the firm of Haseltine Lake & Co, Patent Agents
Southampton Buildings London "AN IMPROVED MACHINE FOR CUTTING, GRINDING,
A communication to me from
AND POLISHING SHEETS OR PLATES OF GLASS
abroad by Henri Thivollet of Lyons, France, Crystal Cutter.
This invention relates to an improved machine for cutting, grinding, and polishing
Figure 1, is a sectional side elevation of the improved mac
Figure 2 is a plan
Figure 3 is an end view and
Figure 4 is a transverse section of the same.
Figure 5 represents the pinion and main driving shaft in detail.
Like letters indicate the same parts throughout the drawing
A represents a long support capable of being oscillated, at will upon two frames
or standards B; this oscillation is obtained by means of the levers H. Through
the centre of this support passes the main driving shaft C which is made with a
screw-thread extending the whole of the length between the frames or standards B.
On the said shaft is fitted a carriage or grindstone-carrier capable of being moved
horizontally along the whole length of the support A between the frames B; this
movement is effected by means of the screw-thread upon the shaft C and a screw-
nut fixed to the carrier; the said carriage is caused to move in one direction or
the other by means of two pulleys and two driving belts one of which is crossed.
D represents a vertical shaft to which the said grindstone is secured and to
which rotary motion is imparted in the following manner, that is to say, a pinion E
is fixed upon and actuated by the shaft C and transmits motion to a short
horizontal shaft F by a gear-wheel F'; the movement of the shaft F is transmitted
to the vertical shaft D by means of two bevel wheels D' D³ as will be readily
understood by referring to the drawing. The vertical shaft D is suspended at its
upper part by a lever G upon which an adjustable weight is placed; this weight can
be moved to give the grindstone more or less pressure upon the glass accord.ng to
the work to be done. The inclination of the grindstone necessary for the cutting
of the glass is obtained by means of the levers H whereby the support A is caused
to move and consequently the position of the grindstone carrier is altered; when
the required inclination has been obtained, the two levers are fixed firmly to the
guides J by means of screws and nuts.
According to the dimensions of the glass to be operated upon automatic
disengaging or disconnecting gear changes the working of the carrier; when the
grindstone is at the end of its course a rod fixed to the said carrier comes against
a stop fixed by means of a set-screw to a bar extending the whole length of the
machine; this bar, by means of a lever causes the belts to be moved, one from the
loose pulley Y on to the fixed pulley x and the other from the fixed pulley x¹ on to
the said loose pulley Y' or vice versa. A hopper fixed to the said carrier serves for
the distribution of the ingredients necessary in the operation of grinding or
the like.
The table or dressing plate K upon which are placed the pieces to be cut,
polished, and finished is capable of oscillation upon a shaft fixed in two standards
which have levelling and adjusting screws for regulating not only the level of the

page_text: glass but also the extent of bevel it is desired to obtain. A raising or lifting screw
is placed at the back of the said table in order to give it more or less obliquity as
may be required. The whole table is movable and travels upon rails, thus
permitting it to be moved forward independently of the tool; this arrangement is
designed for the polishing, and in this case the tool is retained vertical.
As shown in Figure 5 the pinion E is formed in two parts, viz, A sleeve T
not screw-threaded and simply fitting on to the shaft C which is made with a
groove extending the whole length of the shaft and receiving a key for preventing
the sleeve from rotating upon the shaft. Also upon the projecting part V of the
sleeve is keyed the toothed part of the pinion.
The
The rotation of the pinion is effected by means of the shaft C which actuates the
sleeve and consequently the toothed portion which is keyed thereto.
horizontal movement is imparted to it by a nut on the carrier having a screw-
thread corresponding with that on the shaft C, the sleeve being caused to move by
means of the flange T. The pinion therefore has two movements as above stated,
the one rotary and the other horizontal.
In carrying out the operations of cutting, polishing, and finishing the glass upon
this machine, I employ grindstones and wheels of iron, emery (of different degrees
of fineness), sandstone, glass, tin and lead mixed, wood of different kinds, felt,
cloth or the like; and as ingredients I employ Fontainebleau sand and sandstone,
emery in powder of different degrees of fineness, ground pumice stone, or other
suitable material. In order to permit the passage of the ingredients I employ
grindstones or wheels having apertures.
Having thus fully described the said invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim
The improved machine constructed substantially as above set forth for cutting,
grinding, and polishing sheets or plates of glass.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this fifth day of March in the year of our Lord one thousand
eight hundred and eighty three.