Improvements in Gearing Chains.
Year: 1894

page_text: Date of Application, 4th June, 1894-Accepted, 7th July, 1894
Improvements in Gearing Chains.
I, OTTO LINDNER, of 148, Rue de Mérode, Brussels, in the Kingdom of Belgium.
Engineer, do hereby declare the nature of this invention and in what manner tl.e-
same is to be performed, to be particularly described and ascertained in and by the-
following statement:-
My invention relates to gearing or Galle's chains.
The forms of gearing or Galle's chain at present in use exhibit the disadvantage
that they warp when in use, and so suffer in carrying power. This disadvantage is.
the result of the unfavourable way in which the bolts or rivets are taken up, which.
causes them soon to become loose.
The present chain is made up of two members of different kinds, and is distinguished.
from those at present in use by the fact that the lateral plates are furnished with
strong naves or enlargements, which take the load off the bolts, rivets, etc.
Figures 1 to 3 in the drawing shew the method of construction of such a chain--
member. In this construction the diameter of the nave or enlargement a is made
equal to the breadth of the side-plate b, and 'the length of the naves may suitably
be made equal to half the width of the opening between the cheeks, so that they
may touch each other, and the whole member be combined into a connected whole.
by means of the rivet c. If desired, an interspace may be left between the naves.
The rivets may be replaced by bolts, screws, or the like, and these may be made.
hollow if preferred.
The individual members made up as described may be combined into a chain by
means of intermediate members of any desired form.
In Figures 4 and 5 intermediate members d of such a kind, are shewn. The
member shewn in Figure 4 is of the best form, and consists of a lengthened ring,
with a rectangular cross-section. The member shewn in Figure 5 is distinguished
by its good appearance, and possesses the further advantage that it does not allow
the members to come into contact in the longitudinal direction.
The teeth of the chain wheel engage with the members in the openings between.
the side plates b and the pressure exerted by a tooth is equably distributed through
the material of the ring d onto the naves a, and so transferred to the lateral cheeks.
or side plates.
The pins or bolts c are thus in no wise strained by the power which the chain has.
to convey, but merely serve to keep together the several parts of the individual.
members of the chain.
Figures 6 and 7 shew a chain consisting of members of the kind shewn in.
Figure 3 and intermediate members of the kind shewn in Figure 4.
The intermediate members may also be provided with a middle wall e, which then.
lies in the above mentioned space between the naves a.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A gearing chain characterized by chief members which are provided with.
naves or enlargements a, which surround the bolts or rivets c in such a way that.
they transmit the power from the intermediate members on to the lateral cheeks of
the chief members, so that the load is taken off the bolts, rivets, or the like, and
the latter are only called upon to fulfil the purpose of keeping together the two
components of the chief member, substantially as herein before described.

page_text: 2. A gearing chain, the chief members of which are provided with naves and
enlargements a through which the bolts or rivets c pass and which are surrounded
by the intermediate members, the latter having at the same time intermediate walls,
against which the enlargements a rest, substantially as set forth.
3. The improved gearing chain hereinbefore described and illustrated in the 5
accompanying drawing.
Dated the 4th day of June 1804
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.