New or Improved Boring and Grinding Machine for Dental Purposes:
Year: 1897

page_text: .
Date of Application, 26th Aug., 1897
Complete Specification Left 26th May 1898-Accepted 26th Sent
1808
PROVISIONAL SPECIFICATION.
New or Improved Boring and Grinding Machine for Dental Purposes:
I, PAUL VOLLAND, of 87, Prinzen Strasse, Berlin S., Germany, Manufacturer,
do hereby declare the nature of this invention to be as follows:-
The object of the present invention is a combined transportable boring and
grinding machine for dental purposes actuated by a hot-air engine.
The apparatus is also provided with a water heating device and a hot air blow-
ing device.
The apparatus is composed of a supporting board carrying a little grinding
lathe and surmounting the hot air engine which may be enclosed in a wooden or
metal lined casing or supported on a board provided with casters.
The hot-air engine is heated by means of a Berzelius lamp or a gas burner.
The board carrying the small lathe is provided with two openings one for the
filling of the cooling jacket of the motor, the other for the filling of the water
heating reservoir for drinking or for weakening the moulding matter.
This water heating reservoir is provided laterally with a tap extending through
the casing.
The driving shaft of the hot-air engine is connected by means of grooved pulleys
and straps with the shaft of the small lathe and transmits to the latter the
motion of the engine which may be regulated by raising or lowering the heating
flame.
The boring tool may work independently of the grinding lathe by means of a
special transmission so that one operator inay bore a patient's tooth at the same
time another operator grinds or polishes artificial teeth. The two devices for
boring and grinding or polishing inay work separately or together thanks to suit-
able gearings.
The small grinding lathe is arranged for receiving alternately grindstones or
polishing brushes
The hot air blowing device is constituted by a hot air reservoir provided with
tubes, and an elastic blowing ball.
Dated this 25th day of August 1897
L DUVINAGE
Agent for Applicant.
COMPLETE SPECIFICATION.
New or Improved Boring and Grinding Machine for Dental Purposes.
I, PAUL VOLLAND, of 87, Prinzen Strasse, Berlin S., Germany, Manufacturer,
do hereby declare the nature of this invention, and in what manner the same is
[Price 8d.]

page_text: to be performed to be particularly described and ascertained in and by the follow-
ing statement ;-
-
This invention consists in an apparatus for boring, grinding and polishing, and
is especially adapted for the use of dentists. My improved apparatus is worked
by a hot air motor and is arranged in such a manner as to be capable of being
used simultaneously for boring and polishing operations or for one of these opera-
tions alone, the said apparatus being further also capable of supplying hot water
and hot air for dental operations.
In the annexed drawings:
Fig. 1 shows my improved grinding, polishing and boring apparatus in front
elevation.
Fig. 2 shows my improved grinding, polishing and boring apparatus together
with the case or stand F in side elevation, the door of the latter being shown
open so as to expose the interior.
Fig. 3 is a vertical section of the shaft a with the coupling devices.
Fig. 4 is a sectional view of the syringe hereinafter referred to.
The machine is composed
(1) Of a hot air motor; and
(2) Of a lathe.
The hot air motor is fixed upon a frame constructed of iron.
This motor is placed inside a case F on the top of which the lathe is fixed as
shown in Figs. and 2.
The necessary heat for driving, the motor is supplied by a gas burner or equiva-
lent G. The flame of the said burner can be regulated by means of a regulating
apparatus fixed upon the table forming the top of the case at E. This regulator
consists of a disc which is situated immediately over the top end of the gas
tube H which gas tube H is connected to any source of supply the tube I leading
or supplying the gas to the burner G. The lower part of this disc is provided with
grooves arranged in such a way as to be adapted to intercept the admission of
the gas more or less, the arrangement being such that if the disc is turned so
that one of the three divisions marked upon its upper surface coincides with a
fixed indicator or equivalent e there will be full admission of gas to the burner
and consequently full speed of the motor. With a second position of the disc there
will be only a half supply of gas to the burner and consequently about half speed
of the motor and with the third position of the disc the gas will be completely
cut off, thus stopping the motor. can, therefore, according to the position
given to the disc, increase, slacken or stop the speed of the motor and conse-
quently that of the boring and polishing tools worked by the said motor.
I
The hot air motor drives the shaft of a fly wheel preferably by means of a
double crank. The fly-wheel which is not shown in the drawing, consists of or is
provided with a grooved pulley over which two catgut or other suitable cords run
and transmit the movement to the lathe as will be hereinafter described. Further
the fly-wheel may also be provided with a brake which may be of any desired
known construction and which brake may be applied in any suitable manner.
The starting of the motor is effected by a simple turn of the fly-wheel.
Sheet iron reservoirs V and W are fixed to the frame of the motor, towards
the upper part of the box (Fig. 2). The reservoir V supplies cold water for the
These
motor; the reservoir W serves to heat the water for dental operations.
reservoirs receive the water through two orifices A and B (Fig. 2) in the table of
the apparatus.
The quantity of water which is intended to serve for the dental operations is
regulated according to requirements. The water is poured cold through the
orifice B, enters the reservoir D and is heated by the gas flame from, the burner G.
The reservoir D is connected by a pipe with the reservoir W and the heated water
may be drawn from said reservoir W through a suitable pipe leading to the out-
side of the case F and having a suitable cock or valve.
I also employ an improved syringe which syringe is composed of a metal tube f

page_text: (Fig. 4) having a part of its length surrounded with a sheath C to serve as a
handle. The opposite end of the tube f is entered into a tube which is coated
or covered on its exterior with suitable heat retaining material.
An interior
tube g open at one end and closed at the other end as shown is joined to the end
of the tube f and is concentric with the tube ; a lateral opening a¹ is made in
the side of the tube g.
At the extremity of the tube d¹ is a conical tube m to which a quill or equiva-
lent el of suitable shape is removably fixed.
The opposite end of the tube f terminates in a rounded part o to which the
rubber tube n is joined provided with a rubber ball by means of which the air
is forced into and through the syringe. The air passes as indicated by the
arrows in the drawing, through the opening a into the annular space formed by
the tube and the tube g where it is heated in contact with the previously
heated tube d¹.
In order to be heated, the syringe is occasionally introduced into the heated
case F, the quill el having been first removed after which the syringe is taken out
and the quill refixed and the syringe is then in working condition.
The boring and polishing machine is fixed upon the upper surface or table of
the case containing the motor. It is composed of a horizontal shaft a supported
by three small bearings b, 61, 61, fixed to the table by supports. Upon this shaft a
two pulleys p and are mounted, which pulleys p, p, are adapted to be thrown
in or out of gear with this axle a by two small levers Q and R. For this pur-
pose each pulley is fixed on a sleeve X or X1, (Fig. 3) which sleeve can turn
freely upon the axle a, said sleeves being held in their position laterally upon the
axle by means of two collars g, g¹. In the axle a two holes hh are made each
corresponding with a similar hole in each of the sleeves r, x. Each of the
sleeves, ¹, carries a tube i i¹ situated immediately over the apertures referred to
and which tubes are provided with pistons J, J1, which pistons, if pushed into or
entered into the hole h or h¹ in the axle a, couples the corresponding pulley with
this axle the tube has a bayonet groove in which is fixed the working rod
of the piston to keep the pulley in gearing; when the rod q returns to the vertical
part of the bayonet, a spiral spring lifts the piston j and the uncoupling is
effected. In Fig. 3 the right hand pulley is in gear; each pulley has a driving
One of the cords runs direct
cord passing also around the fly-wheel pulley.
whilst the other is crossed, so that, accordingly as the one or the other of the
pulleys por p is geared with the axle the rotation of the axle will be in one
or other direction. The extremity of the axle is arranged to receive parts intended
to bear the grinding stones or polishing brushes, these tools being applied by
means of the screw S, about as shown.
For the working of the boring apparatus, the axle a has a conical toothed
pinion r gearing with another conical pinion which is fixed upon a small hori-
zontal axle bearing at one of its extremities a small grooved pulley d; over this
pulley a cord runs which transmits the rotary movement to an axle k having
a pulley d and turning in two bearings supported by a rod T; this rod, adapted
by the aid of a socket-joint to the upper part of the support of the bearings b
and b¹, may be brought to any position in the vertical plane and fixed in position
The small axle is connected with a
by the screw Z, as shown by Figs. 1 and 2.
flexible axle u to the extremity of which the boring instrument is fixed. The small
axle of the pulley d can by means of the screw U be slightly displaced horizon-
tally sufficiently to allow the wheels r and r be put into or out of gear, thus
allowing the simultaneous or separate working, of the boring instrument and the
polishing or grinding tool.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
1 ~-inding machine for the use of dentists, worked

page_text: by a hot air motor arranged in a case or chest serving as a stand for the lathe,
the boring apparatus and the polishing and grinding apparatus being adapted to
work simultaneously or separately; the speed of the instruments being regulated
as well as that of the motor by regulating the admission of gas to the burner
and the case containing the latter being supplied with a hot water reservoir for
dentary operations for the purposes and all substantially as described and illus-
trated.
(2.) In a boring and grinding machine as claimed in Claim One the arrange-
ment of a horizontal axle turning in bearings fixed by supports on the table of
the case containing the motor, this axle bearing, at one of its extremities the
grinding or polishing instruments and having two pulleys adapted to be coupled
or uncoupled therewith as desired, one of these pulleys having a crossed cord
coming from the fly-wheel pulley of the motor, and the other a straight cord
coming from the fly-wheel pulley to allow the movement of the axle in either
direction, as desired, substantially as and for the purposes set forth.
(3.) In a boring and grinding machine as claimed in Claim One the arrangement,
upon the transmission axle, of a conical wheel gearing with another conical wheel
fixed upon a small axle which is adapted to be slid horizontally so as to put said
conical wheels into or out of gear as desired said small axle having a pulley trans-
mitting the movement to an axle connected with a flexible axle bearing the boring
instrument; this latter axle being supported by a rod attached by means of a
socket joint to the support of the bearings of the first transmission axle and
capable of being set in any position around the socket joint in a plane parallel
to that of the pulley which transmits the movement to the axle of the instrument
substantially as and for the purposes set forth.
(4.) In a boring and grinding machine as claimed in Claim One a hot-air
syringe serving for dental operations and having a tube covered at one part with
a sheath serving as a handle and at another part with a heat retaining sheath in
the interior of which the air forced into and through the syringe becomes heated
and passes through a quill or equivalent of suitable shape said quill being fixed
to the conical end of the syringe, all substantially as and for the purposes set
forth.
Dated this 20th day of May 1898.
By His Agents,
PAUL VOLLAND,
Horn, Son, & Co.,
151, Strand (next to Somerset House).