Year: 1898

page_text: A communication by the Firm of BLUHM & Co., and JOSEPHI BAUR, both of 3B,
Mandlstrasse, and JUSTUS WALDTHAUSEN, of 16, Schonnerstrasse, all of Munich,
in the Empire of Germany, Manufacturers and Merchant respectively.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, 118, New Street, Birmingham, in the County of
Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
The invention has for its object an easy and secure attachment of a motor to a
bicycle whether it be a single or tandem of the ordinary construction so that any
of the latter may with small assistance be easily and conveniently converted into
a motor cycle and vice versa any motor cycle may be converted into a bicycle
or the like of ordinary construction. Care is also taken in doing this that the
centre of gravity of the wheel longitudinally is not displaced, but that it coincides
entirely or approximately with that of the motor and in consequence of the
movement of the piston a displacement of the centre of gravity in a longitudinal
direction does not take place.
In view of all these circumstances the motor must be arranged in proximity
to the pedal shaft of the machine in such a way as to be easily removable. By
this invention the frame construction of the ordinary bicycle remains unchanged.
The attachment of the motor takes place by means of the crank bearings thereof,
which are formed into a casing. The latter is so fitted on to the frame that it
connects both the inner and under ends of the under frame-tube, the saddle sup-
port, the rear wheel fork disc, and of the cylinder respectively. For this object
the casing is formed in two parts which are connected one with another by means
of suitable flanges and suitable joints and which receive between them the above
mentioned parts.
The main axle of the motor travels in suitable ball bearings in the casing and
inside the same the crank is provided on both sides with fly blocks, which serve
as flywheels on the main shaft being rotated which is effected by the connecting
rod. The gear shaft of the motor (which works in a four stroke cycle) travels
also in ball bearings in the casing. A cam disc is directly mounted on this gear
or pedal shaft, which can disc serves for operating a discharge valve, whereby a
considerable saving in space and mechanism and thereby a reduced friction is
attained. The cam disc has two cam projections which in their rotation alter-
nately act upon a bell crank lever which consequently opens at certain intervals
of time the discharge valve by means of a spindle or link.
A benzine or the like container is attached to the top frame-bar of the cycle
in such a way as to be removable and is provided with a regulating device and with
a pipe to the inlet or suction valve. The discharge chest is connected by a suitable

page_text: pipe with the casing of the discharge valve. On the gear or pedal shaft which is
connected by means of a suitable chain gearing with the back wheel, there are
mounted ordinary pedals which allow of the machine being used as an ordinary
pedal bicycle.
The casing of the motor is filled with oil so that the motor shaft together with
the crank and the flywheel and also the pedal shaft run in oil.
As the rear mouth of the cylinder opens into the casing a compression of the air
above the oil takes place in the casing on the return of the piston whereby the oil
is forced into the bearings of the main shaft, crank and pedal shaft, thus effecting
the lubrication of the said bearings.
It is evident that the motor may be easily removed, and that after the short
under frame-tube has been replaced by a longer one and the ordinary crank
bearing of the ordinary bicycle has been inserted an ordinary bicycle is again con-
stituted.
Dated this 31st day of May 1898.
A communication by the Firm of BLUHM & Co., and JOSEPH BAUR, both of 3B,
Mandlstrasse, and JUSTUS WALDTHAUSEN, of 16, Schonnerstrasse, of Munich,
in the Empire of Germany, Manufacturers and Merchant respectively.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, 118, New Street, Birmingham, in the County of
Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer,
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
This invention has for its object an easy and secure attachment of a motor to a
bicycle, whether it be a single or tandem of the ordinary construction so that any
of the latter may with small assistance be easily and conveniently converted into
a motor cycle and vice versa any motor cycle may be converted into a bicycle
or the like of ordinary construction. Care is also taken in doing this that the
centre of gravity of the wheel longitudinally is not displaced but that it coincides
entirely or approximately with that of the motor and in consequence of the
movement of the piston a displacement of the centre of gravity in a longitudinal
direction does not take place.
In view of all these circumstances the motor must be arranged in proximity to
the pedal shaft of the machine in such a way as to be easily removable.
By this invention which is shown in the accompanying drawings, Figure 1
being an elevation of the whole motor cycle, and Figure 2, a longitudinal section
of the flywheel case, the frame construction of the ordinary bicycle remains un-
changed. The attachment of the motor takes place by means of the crank bearings
thereof which are formed into a casing a. The latter is so fitted on to the frame
that, as shown in Figure 1, it connects both the inner and under ends of the under
frame-tube, the saddle support, the rear wheel fork or bottom bracket, and of the
cylinder respectively. For this object the casing is formed in two parts a¹ a³

page_text: which are connected one with another by means of suitable flanges and suitable
joints and which receive between them the above mentioned parts.
The main axle of the motor travels in suitable ball bearings in the casing a and
inside the same the crank is provided on both sides with fy blocks h, Figure 2,
which serve as flywheels on the main shaft being rotated which is effected by
the connecting rod k. The gear shaft m of the motor (which works in a four
stroke cycle) travels also in ball bearings in the casing a. A cam disc c is
directly mounted on this gear or pedal shaft m, which cam disc serves for
operating a discharge valve whereby a considerable saving in space and
mechanism and thereby a reduced friction is attained. The cam disc has two
cam projections which in their rotation alternately act upon a bell crank lever d
which consequently opens at certain intervals of time the discharge valve n by
means of a spindle or link e.
The shafts and m are connected with each other by means of suitable chain
gearing as shown.
A benzine or the like container f is attached to the top frame-bar of the
cycle in such a way as to be removable and is provided with a regulating device
and with a pipe to the inlet or suction valve s. The discharge chest g is connected
by a suitable pipe with the casing of the discharge valve n.
On the gear or
pedal shaft m which is connected by means of a suitable chain gearing with the
back wheel, there are mounted ordinary pedals which allow of the machine being
used as an ordinary pedal bicycle.
1
The casing of the motor is filled with oil so that the motor shaft i together with
the crank and the flywheel h and also the pedal shaft m run in oil.
As the rear mouth of the cylinder opens into the casing a a compression of
the air above the oil takes place in the casing a on the return of the piston
whereby the oil is forced into the bearings of the main shaft i, crank i¹ and pedal
shaft, thus effecting the lubrication of the said bearings.
It is evident that the motor may be easily removed, and that after the short
under frame-tube has been replaced by a longer one and the ordinary crank
bearing of the ordinary bicycle has been inserted an ordinary bicycle is again
constituted.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is:
A motor cycle consisting of a bicycle of ordinary construction (single or tandem)
the crank bearings of which are formed as a removable casing (a) in two parts,
in which casing the crank axle of the motor is mounted, and which receives in
addition to the under frame tube, the saddle support, and the rear wheel fork
or bottom bracket, also the vertically arranged cylinder of the motor, substantially
as herein before described.
Dated this 7th day of Wohman 1200
WM. P. THOMPSON & Co.,
Agents.