Year: 1897

page_text: I, JOSEPH HAIDER, of Paulanenplatz, 31, Munich, in the Empire of Germany,
Locksmith, do hereby declare the nature of this invention to be as follows:-
This invention relates to a chain gearing in which the driving chain consists
of links provided with inwardly projecting noses in such a manner that the noses
engage into correspondingly formed indents on the chain wheels. The chain is
further formed in such a manner that the connecting bolts of the chain links,
round which the same turn, are situated entirely outside of the periphery of the
chain wheel. As the radius determined by the centre of the pivot of the links
is that necessary for calculating the proportions of the gearing, this arrangement
allows that with an equal ratio of gearing the radius of the chain wheels can be
smaller, than was the case hitherto. Besides the noses or rollers of the chains,
as well as the indents in the chain wheels are formed in such a manner that the
noses or rollers engage with the indent in an entirely noiseless manner and with
a minimum of friction, whereby a quiet, noiseless working is obtained with a
minimum of requirement of power. The connecting bolts suffer less wear than
in the hitherto used chains in consequence of the circumstance, that they lie
entirely outside the chain wheel and do not participate directly in the propulsion
of the same.
Each alternate link of the chain is provided on either of its sides with an
in wardly projecting shield which serves to prevent the lateral displacement of the
chain from the chain wheels, these shields are perforated, such perforations
allowing the dirt etc., collected in the chain and indents of the chain wheel to be
pressed aside into these holes during the action of the gearing and be easily
removed, so that the chain is always kept clean and the gearing remains correct.
Also instead of the inwardly projecting noses aforesaid these may be replaced
by rollers.
I, JOSEPH HAIDER, of Paulanenplatz, 31, Munich, in the Empire of Germany,
Locksmith, do hereby declare the nature of this invention and in what manner
[Price 8d.1

page_text: the same is to be performed to be particularly described and ascertained in and
by the following statement:-
This invention relates to a chain gearing in which the driving chain consists
of links provided with inwardly projecting noses or rollers in such a manner
that the noses or rollers of the same engage into correspondingly formed indents
on the chain wheels. The chain and the wheel are further formed in such a
manner that the connecting bolts of the chain links, round which the same turns,
are situated entirely outside the periphery of the chain wheels. As the radius
determined by the centre of the pivot of the links is that necessary for calculating
the proportions of the gearing, this arrangement allows, that with an equal rate
of gearing the radius of the chain wheels can be smaller, than was the case hitherto.
Besides the rollers of the chains, as well as the noses they are provided with, and
the indents in the chain wheels are formed in such a manner, that the rollers or
noses engage with the indents in an entirely noiseless manner and with a minimum
of friction, whereby a quiet noiseless working is obtained with a minimum of
requirement of power. The connecting bolts suffer less wear than in the hitherto
used chains in consequence of the circumstance, that they lie entirely outside the
chain wheels and do not participate directly in the propulsion of the same.
In the annexed drawing-Fig. 1 shows a form of construction of the chain
on the corresponding chain wheels. Fig. 2 is a plan view of this form of con-
struction of the chain. Figs. 3 & 4 show a modified form of construction of the
chain in side and in plan view respectively, whilst Figs. 5 & 6 show similar views
of a further modified form of construction of the chain.
The chain consists in the form of construction shown in Figs. 1 & 2 of two
kinds of chain links & i, which are always arranged in couples symmetrically
and alternately. The shield like formed chain links are connected with the
intermediary links i, by the pins d. Each of these chain links b carries a roller c
seated in the same and which reaches into the indents g of the chain wheels. The
links form the middle part of the chain, whilst the shield like links b form the
exterior part Fig. II. The shields themselves are provided with perforations f.
In order to obtain the desired effect by means of this chain, the chain wheels
are formed especially, so that the gearing of the chain with the wheel is correct
and that the chain lies conveniently on the wheel. For this purpose the diameter
of the chain wheel is measured in such a manner, that the eyes of the chain links,
in which the connecting bolts d are situated, are lying on the periphery of the
chain wheel whilst the indents g for receiving the rollers effecting the transmission
are formed in such a manner, that these rollers fit into the indents exactly when
entering or leaving the same. When the chain is guided round a wheel of
smaller diameter, the gearing parts of the chain links come more closely to one
another, than when guided round a larger wheel, so that the divisions of the
smaller wheel are less than that of the larger one. Therefore the chain wheels
must be especially divided for each gear or rate of transmission. At the same
length of the chain links the smaller wheel receives a larger number of teeth,
than when using the hitherto usual chains (provided the diameters are equal).
This difference of the division is shown in Fig. 1 where the parts h between
the indents are considerably longer in the larger wheel, than on the smaller chain
wheel.
The shield like links b serve also for preventing the chain from sliding off
and thus the lateral guiding rings are avoided.
The perforations have the purpose, that the dirt collected in the chain, and
in the indents of the chain wheel is pressed aside by the entering of the rollers
into the indents and is removed through the perforations from the chain, so that
the chain is always kept clean and the gearing remains correct.
In the form of construction shown in Figs. 3 and 4 the intermediary links i are
replaced by the connecting links a. These chain links a are provided with
pointed noses, the side surfaces of which are formed of convex arcs and the centres

page_text: of which are at the turning points d of the links. The chain wheel receives them
between the roller indents g.
In the form of construction shown in Figs. 5 & 6 the links i or a are replaced
by links e which connected with the links b carry similar rollers. The division
of the chain wheels must then also be arranged according to the number of rollers.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is:-
'
1. An improved chain gearing for cycles and the like, in which the links b
carrying the rollers c reaching into indents g of the chain wheels are formed in
such a manner, that they overlap the edges of the chain wheel, which has no
flanges and are provided with perforations f and in which the intermediary links i
may or may not be provided with rollers or noses reaching into indents of the
chain wheels.
2. The combination of the chain wheels and chain constituting the gearing
substantially as described and illustrated.
L
01 1.
fav 1908
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, London.