Year: 1887

page_text: Date of Application, 29th Aug., 1387
Complete Left, 26th May, 1888
Complete Accepted, 29th June, 1888
I, HERMANN GLAESER of No. 12 Mariahilfer Strasse in the City of Vienna,
Austria, Electrician, do hereby declare the nature of my said invention to be as
follows:-
My invention relates to improvements in electrostatic generators and consists
essentially in the use of two hollow drums as electric generators, the smaller drum
being arranged within the larger one and both rotating on a common axle but in
opposite directions.
Two vertical standards connected at their upper ends by a suitable beam or
connecting rod are arranged on an appropriate platform and serve to carry the three
horizontal shafts arranged parallel to each other.
The upper main shaft consists of a fixed shaft and two sleeves or hollow axles which
surround the said main shaft and to which two small pulleys are fixed. The drums
are arranged to revolve around the axle between these small pulleys, and can be
made of hard india rubber, sulphur, glass or any other similar material applicable for
the generation of electricity. Only the outer drum is visible, whereas the smaller
drum is placed in the interior of the larger one and is of such dimensions as to
revolve freely within the said larger drum without touching its interior surface. The
larger exterior drum is fastened concentrically to one of the sleeves on the main axle
by means of an appropriate flange whilst the smaller drum is concentrically fastened
to the second sleeve or hollow axle by means of a smaller flange.
The exterior drum strengthened by the flange rests on one of the hollow axles or
sleeves so as to revolve on the same, whilst the inner drum is arranged in a similar
manner, by means of the flange so as to revolve on the fixed shaft.
The two lower shafts or axles placed side by side underneath the drums, have each at
their rear end outside of the standards a cog wheel, said wheels gearing into each
other. Inside of the standards the two axles are provided with two pulleys placed
diagonally opposite each other and connected with the corresponding pulleys placed
above them. One of the lower axles also serves as driving shaft and is therefore
provided at its front end with a crank. In larger electric machines the crank is
replaced by a pulley. The two uprights or columns rest on the platform and are held
7

page_text: by the cross beam. These columns serve for the purpose of holding the rake like
collectors in their horizontal position, whilst the shaft carries the double rake collector
in a vertical position in the interior of the small drum. The discharger is placed at the
upper end of the columns or uprights.
The aforedescribed mechanism operates in the following manner :-
The revolution of the crauk causes the motion to be transmitted in the same
direction to the outer drum by means of appropriate pulleys, whilst the other axle is
made to revolve in the opposite direction by the gearing of the cog wheels, which
movement is then transmitted to the smaller drum by means of suitable pulleys.
When the machine has been brought into motion in this manner a small strip of
hard rubber rubbed with cloth brought near the large drum is sufficient to excite the
drum.
If the motion is stopped the electric excitement of the larger drum remains for
several hours.
The advantages of this my new invention, when compared with machines now in
use are,
1. The larger amount of evolved electricity in comparison to the size of the machine
and the force of motive power.
2. Easy electric excitement,
3. Long duration of the excited electricity after stopping the motion of the
machine.
4. The possibility of erecting large electric machines of dimensions hitherto
not used.
Dated this 29th day of August 1887.
Π
DALrat

page_text: COMPLETE SPECIFICATION.
Improvements in Actuating Mechanism for Electrostatic Generators.
I, HERMANN GLAESER of No. 12 Mariahilfer Strasse, Vienna, Austria, Electrician,
do hereby declare the nature of my said invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
My invention relates to improvements in electrostatic generators and consists
essentially in the use of two hollow drums as electric generators, the smaller drum
being arranged airtight within the larger one and both rotating on a common axle but
in opposite directions.
The accompanying drawing shows in Figure 1 a perspective view of a machine
constructed according to my invention, in Figure 2 a vertical longitudinal section of
the main shaft and the two airtight drums.
Two vertical standards S S are arranged in the base and are connected at their
upper ends by the connecting rod V and serve as bearings for three parallel
spindles.
The main shaft consists of a stationary axle A Figure 2 and two sleeves a a¹
mounted on the same each of these said sleeves being provided with a small strap
lrun 2 ጎ
On the sleeves a al and at appropriate distance from the strap drums I mount
two drums T T of ebonite, vulcanite, glass sulphur or other idioelectrical material,
the drum T only being visible whilst the smaller drum T is arranged within the
drum T and is air tight enclosed in the same which is of such size that it fits so snugly
around the smaller drum that the same is just able to rotate within the larger drum
without contact with the same. The outer drum is attached at one end to the hollow
axle or sleeve a by means of the flange or nave F, whilst the inner smaller drum is
concentrically attached to the sleeve a by the flange or nave F¹. The other disc-
shaped end of the drum T is held in a suitable nave which is arranged loosely on
the sleeve a whilst the opposite end of the inner drum is held in a like nave/" on the
stationary shaft A. The two lower parallel spindles B and C, Figure 1, carry each a
toothed wheel which are in gear with each other and are located outside the
standards S¹.
The strap drums R R¹ on the spindles B, C, are mounted between the two
standards SS and are connected by means of suitable straps with the upper strap
drums R R¹.
The spindle B serves also as driving spindle and is at the one end provided with a
crank K.
For larger induction machines or for special purposes for instance in machines
operated by a motor for surgical or medical purposes the crank is replaced by a
strap drum.
The base frame carries furthermore two standards L and L, which are connected at
their upper ends by means of the cross beam Q and serve to carry the horizontal

page_text: rakes M, N, whilst a vertical double rake n n attached to the fixed shaft A is
arranged within the smaller drum T'. The discharger E E' is arranged on the
upper ends of the standards L, L.
The operation of the parts is as follows
The rotary movement of the crank K is transmitted by the strap drums R r
in the same direction, to the outer drum T whilst the said movement is transmitted
to the smaller drum T', but in the opposite direction through the toothed wheel on
the spindle C and the strap drums R.
If the machine is in operation it will only be necessary to bring a strip of
ebonite or its equivalent which has been rubbed a little with a cloth, near to the
outer drum in order to excite (charge) the machine. If the movement is stopped
the electric charge of the drum from one single exciting will last for hours.
The advantages of my improved construction in comparison with the existing
induction machines are,
1. The large quantity of electricity generated in proportion to the dimensions of
the machine and the motive force employed.
2. The ready exciting of the machine even in unfavorable positions and damp
air in consequence of the two drums being hermetically sealed so that three
surfaces of the hollow induction drums are hermetically closed from all communica-
tion with the atmosphere.
3. The long duration of the storage of the electricity when once excited even
after the stoppage of the machine in consequence of the drums being hermetically
closed.
4. The possibility of erecting induction (Holtz) machines in hitherto unprecedented
dimensions.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed 1 desire it to be understood that
what I claim is :-
:-
11
In a machine of the kind herein before described, the arrangement on a common
axle of two hollow drums such as T and T', which rotate in opposite directions and
serve as electrical generators, said hollow drums being arranged one within the
other and hermetically closed against the entrance of air, substantially as and for the
purpose set forth in the foregoing specification and shown on the accompanying
drawings.
Dated this 26th day of Nov 1900