IMPROVEMENTS IN GRINDING MACHINES
Year: 1881

page_text: LETTERS PATENT to Maurice Bauer, Civil Engineer, of the Firm M. Bauer
& Co., Solicitors of Patents, at Paris, in the French Republic, for an
Invention of "IMPROVEMENTS IN GRINDING MACHINES." A communication
from Alfred Chéron, of Redon, Ille & Vilaine, France.
PROVISIONAL SPECIFICATION left by the said Maurice Bauer at the Office
of the Commissioners of Patents on the 22nd April 1881.
MAURICE BAUER, Civil Engineer, of the Firm M. Bauer & Co., Solicitors of
Patents; at Paris, in the French Republic. "IMPROVEMENTS IN GRINDING
MACHINES." A communication from Alfred Chéron, of Redon, Ille & Vilaine,
France.
According to this Invention the machine is constructed as follows:-
Two cast iron or wooden standards made as light as possible form the frame of
the machine. These standards are connected together by stretcher rods, and secured
together by screws.
On the standards are four bearings for four shafts, the first of which is furnished
with a crank handle. On this shaft is a strap pulley, the rotation of which is
transmitted to the second shaft by means of a strap pulley thereon; there is also
on this second shaft a second strap pulley, by means of which the motion is
transmitted to the third shaft, the latter carries a fly wheel, a strap pulley, which
receives the motion, and another strap pulley, which gives motion to the fourth
shaft, on which are fixed a strap pulley and the grind stone.
The third and fourth shafts are of steel, and are made with conical points at
their ends. These points run in peculiar countersunk bearings of special form
made to suit them; the cylindrical part of these bearings carries two arms or
cheeks;
it is bored through and countersunk conically on the working side.
The two arms or cheeks connected with the cylinder are for fastening the latter,
and are held in their places between the plummer block covers and bodies by means
of screws.

page_text: As the conical bearings wear out they can be adjusted by means of a simple slide
arrangement, so that the shafts always run steadily.
The grindstone shaft carries on one side of the grindstone a fixed collar, and on
the other a moveable ring, against which are placed loose discs or washers of
various thicknesses, on which a securing nut presses direct, and thus fixes the
grindstone. According to the various thicknesses of the latter a greater or
lesser number of discs or washers are placed between the ring and the securing
nut.
Over the above mentioned and corresponding strap pulleys run straps of suitable
material, so that the machine works noislessly.
In front of the grind stone is placed a moveable rest, which may be placed
nearer to or further from the grindstone, according to the diameter of the latter.
Instead of the grindstone a round saw blade may be fastened on to the
corresponding shaft, and the whole used as a circular saw.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by.
the said Maurice Bauer in the Great Seal Patent Office on the 22nd October
1881.
"
MAURICE BAUER, Civil Engineer, of the Firm of M. Bauer & Co., Solicitors of
Patents, at Paris, in the French Republic. IMPROVEMENTS IN GRINDING
MACHINES." A communication from Alfred Chéron, of Redon, Ille & Vilaine,
France.
Fig. 1 of the Drawing is a side elevation of a grinding machine constructed in
accordance with this Invention; Fig. 2 is a back elevation; and Fig. 3, a plan of
same; Figs. 4, 5, and 6, shew details of certain parts of the machine.
On this
Two cast iron or wooden standards A, made as light as possible, form the frame
of the machine. These standards A are connected together by stretcher rods B, and
secured together by screws. On the standards are four bearings for the four shafts
C, D, E, F; C is the crank shaft, and is furnished with a crank handle G.
shaft is a strap pulley H, the rotation of which is transmitted to the second shaft D
by means of a strap pulley I thereon; there is also on this second shaft D a second
strap pulley K, by means of which the motion is transmitted to the third shaft E;
the latter carries a fly wheel L, a strap pulley M, which receives the motion, and
another strap pulley N, which gives motion to the fourth shaft F, on which are
fixed a strap pulley O and the grind stone I.
The third and fourth shafts E and F are of steel, and are made with conical
points at their ends. These points run in peculiar countersunk bearings R of
special form made to suit them, see Figs. 4, 5, and 6.
The cylindrical part of these bearings carries two arms or checks a; it is bored
through and countersunk conically on the working side.
The two arms or cheeks a connected with the cylinders are for fastening the
latter, and are held in their places between the plummer block covers and bodies
by means of screws:
As the conical bearings wear out they can be adjusted by means of a simple slide
arrangement, so that the shaft always run steadily.
The grindstone shaft F carries on one side of the grindstone a fixed collar Q, and
on the other a moveable ring U, against which are placed loose discs or washers of
various thicknesses, on which a securing nut S presses direct, and thus fixes the
grindstone. According to the various thicknesses of the latter a greater or
lesser number of discs or washers are placed between the ring U and the securing
nut S.
Over the above mentioned and corresponding strap pulleys run straps (see Fig. 1)
of suitable material, so that the machine works noiselessly.
In front of the grindstone is placed a moveable rest, as shewn in Figure 1,
which may be placed nearer to or further from the grindstone, according to the
diameter of the latter.
Instead of the grind stone a round saw blade may be fastened on to the
corresponding shaft F, and the whole used as a circular saw.
Having now described the nature of the said Invention, and the manner in
which the same is to or may be carried into effect, I would have it understood that
what I claim as the Invention to be secured by the herein in part recited Letters
Patent is,―
First. The grinding machine, consisting of the two standards A, the stretcher
rods B, the shafts C, D, E, and F, with their respective strap pulleys, and the.
grindstone or saw P, the whole arranged and combined as hereinbefore described
and illustrated in Figures 1, 2, and 3 of the Drawings.

page_text: Second. The device for allowing of the changing of the grindstone or circular
saw, consisting of the ring U; nut S, and the discs or washers of various thicknesses
between such ring and nut, as herein before described and illustrated in Figs. 2 and 3
of the Drawings.
Third. The employment of the point bearing R, constructed as hereinbefore
described and illustrated in Figures 4, 5, and 6 of the Drawings, and for the
purpose set forth.
In witness whereof, I, the said Maurice Bauer, have hereunto set my hand
and seal, this Eighteenth day of October, in the year of our Lord One
thousand eight hundred and eighty one.
'
Witness,
LORENTZ ALBERT GROTH, K.G.V.,
MAURICE BAUER, (L.S.)
Of the Firm of M. Bauer & Co.
Proprietor of the Scandinavian Patent Office,
97, Finsbury Pavement,
London, E.C.