con struction of driving screws on ice-vehicles and the like
Year: 1899

page_text: 1, ERNST ALFRED PAUL HENNIG, Professor, 25, Nordstrasse, Dresden, Saxony,
do hereby declare the nature of this invention to be as follows;―
This invention relates to certain new and useful improvements in the con-
struction of driving screws on ice-vehicles and the like, (cf. Pat. No. 24977,
1897)
The invention consists in the construction of a driving-screw the thread of
which being formed by bent strips of metal or other suitable material provided
with a sharp edge on their outer side is-mediately or immediately-supported
on the screw shaft by spokes, so that the strips or windings do not extend up
to the central shaft, but leave a nearly hollow space (as seen in the direction of
the axis) between the thread, respectively its supports, and the shaft, which
hollow space allows the snow lying on the ice and offering resistance to the moved
vehicle, to pass through it.
In the accompanying drawings:
Figures 1-6 represent four variations of the screw, all proceeding from the
same idea.
Figure 1 represents a cross section, Fig. 2, a partly longitudinal section of
the first,
Fig. 3, a side view of the second,
Fig. 4 a side view of the third,
Fig. 5, a cross section and Fig. 6, a side view of the fourth construction of
the screw.
Similar letters of reference indicate corresponding parts.
These four constructions have in common with each other: the shaft (C), which
in the drawings is hollow, but which also may be solid,--the spokes (S) in
connexion with the naves (N) being arranged on the shaft, and the bent metal
strips (A, or, in Figures 5 and 6: A₁) which latter are provided with a sharp
edge (B) on their outer side and serve as a screw thread.
In Fig. 1 and Fig. 2, the rim (K) being attached to the outward ends of the
spokes (S) forms the basis of the thread strips (A), which strips pass over the
rim and are connected to it at the required places.
In Fig. 4, the different rims (K), besides are combined with each other by
ledges (L L L L L₁) on which the thread strips (A) are secured.
In Fig. 3, the rims and ledges of Fig. 4 are substituted by a hollow.
cylinder (R) supported on the shaft (C) by spokes (S) and forming the basis on
which the thread strips are secured.
Figures 5 and 6 differ from Figures 1-4 in as much as the thread strips (A)
are immediately connected to the spokes (S), the latter being provided with
slits (E) at their free ends into which recesses the strips are secured.
In this construction the thread having only support on the outward ends of the

page_text: spokes, the metal strips (A₁) will be formed relatively stronger than those of
the other constructions.
In each of the four constructions the contrivances applied to support the thread,
respectively the different bent strips, on the shaft and comprising, in Figures 3,
5, 6, spokes (S) in connexion with nave (N); in Figures 1, 2, 4, spokes (S) in
connexion with nave (N) and rim (K) are as often arranged at certain distances
apart on the shaft (C) as the length of the screw and the fastness of the strips
sustaining the load of the vehicle, require.
The different constructions of the screw will be formed (f.e. cast) on the whole
or in parts, its parts will be welded together or combined otherwise.
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Improved Driving-screws for Ice-vehicles.
D, ERNST ALFRED PAUL HENNIG, Professor in Dresden, Saxony, Nordstrasse 251,
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 relates to certain new and useful improvements in the con-
struction of driving-screws on ice-vehicles, machines for clearing ice-surfaces and
the like, (cf. Pat. No. 24977, 1897). This invention is patented in Germany
(No. 110282).
The invention consists in the construction of a driving-screw the fhread of
which being made of bent strips of metal or other suitable materials provided
with a sharp edge on their outer side is directly or indirectly-supported on
the screw-shaft by spokes or stays so that a nearly hollow space (as seen in
the direction of the axis) is left between the thread, respectively its supports,
and the shaft, which hollow space allows the snow lying on the ice and offering
resistance to the moved vehicle to pass through it.
In the drawings (left with the Provisional Specification):
Figures 1 to 6, represent four variations of the screw all proceeding from the
same idea.
Figure 1, represents a cross section, Figure 2, a partly longitudinal section of
the first,
Figure 3, a side-view of the second,
Figure 4, a side-view of the third,
Figure 5, a cross section, and Figure 6, a side-view of the fourth construction of
the screw.
Similar letters of reference indicate corresponding parts.
These four constructions have in common with each other: the shaft (C) which
in the drawings is shown hollow, but which also may be solid, the spokes (S) in
connexion with the naves (N) being arranged on the shaft, and the bent metal
strips (A, in Figures 1 to 4; A₁, in Figures 5 to 6) which latter are provided
with a sharp edge (B) on their outer side and serve as a screw-thread.
In Figure 1 and Figure 2, the rim (K) being attached to the outward ends of the
spokes (S) forms the basis of the thread-strips (A), which strips pass over the
rim and are connected to it at the required places. The rims will also be broken
at the places which do not serve as supports for the thread.
In Figure 4, the different rims (K), besides, are combined with each other by
ledges (L L L L L₁) on which the thread-strips (A) are secured.

page_text: In Figure 3, the rims and ledges of Figure 4 are substituted by a hollow
cylinder (R) supported on the shaft (C) by spokes (S) and forming the basis on
which the thread strips are secured.
:
Figures 5 and 6 differ from Figures 1 to 4 in as much as the thread-strips (A)
are directly connected to the spokes (S), the latter being provided with
slits (E) at their free ends into which recesses the strips are secured.
In this construction the thread having only support on the outward ends of the
spokes, the metal strips (A₁) will be formed relatively stronger than those of
the other constructions.
In each of the four constructions the contrivances applied to support the thread,
respectively the different wound strips on the shaft and comprising in Figures 3, 5, 6
spokes (S) in connexion with nave (N); in Figures 1, 2, 4, spokes (S) in connexion
with nave (N) and rim (E) are as often or rarely arranged at certain distances
apart on the shaft (C) as the length of the screw and the fastness of the strips
sustaining the load of the vehicle just require. The ends of the screw-thread
will be reduced and attached to the axis, or elsewhere be connected to their
supporting contrivances.
The different constructions of the screw will be formed (for example cast)
in the whole or in parts; its parts will be welded together or combined other-
wise.
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
claim is
In any kind of ice-vehicles, machines for clearing ice-surfaces and the like,
moved by driving-screws a driving-screw the thread of which consisting of bent
strips of metal or other suitable materials and provided with a sharp edge on
their outer side is indirectly or directly supported on the shaft by spokes or
stays of any suitable kind and form, so that a nearly hollow space, as seen in the
direction of the axis, is left between the thread, respectively its carrying con-
trivances, and the axis, through which hollow space the snow lying on the ice
and offering resistance to the moved vehicle can pass, substantially as described.
Dated this 17th of June 1900.
D. ERNST ALFRED PAUL HENNIG,
Professor, Dresden, Nordstrasse 251.