Improvements in Cases or Protectors for Chain Gear, more particularly for use on Cycles.
Year: 1898

page_text: Date of Application, 20th July, 1898-Accepted, 8th Oct., 1898
Improvements in Cases or Protectors for Chain Gear, more
particularly for use on Cycles.
I, WILLY DEDERICH, of 1 and 2, Chiswell Street, London, E.C., Manufacturer
(a communication from Richard Temmel, of 6, Schlesische Strasse, Berlin, S.O.
33, Germany, Manufacturer), 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:―
My invention relates to gear cases or protectors more particularly for use on
cycles and has for its object to provide a gear case or protector that shall not
need fixture to the frame of the machine; but that shall be carried by the chain
and that shall effectively protect the chain from the deposit of dust and exposure
and that shall be capable of inexpensive production.
My invention consists of a gear case or protector as a band to which scales
are secured in succession which has provided on either side flanges and which
thereby cover the chain upon the top and sides and move therewith and my
invention further consists in the provision of a fixed plate in position immedi-
ately above or beneath that part of the chain wheels so that a complete enclosure
may thereby be provided for the chain.
-
My invention is illustrated in the accompanying drawing in which:-
Figure 1 is a front elevation of a gear case or protector made in accordance
with my invention applied in position upon the chain gear of a cycle.
Figures 2, 3, and 4 are respectively front elevation, plan and sectional eleva-
tion, in detail of a part of the gear casing or protector employed, while
Figures 5, 6, and 7 illustrate in detail section alternative means of completing
the enclosure of the chain and Figure 8 is a detail part plan corresponding to
Figure 1.
In carrying my invention into effect as illustrated in the accompanying draw-
ings I provide a strip of canvas A or other suitable flexible and stout material
of a width equal or corresponding to that of the chain and along that strip of
canvas or other material I secure scales B preferably in a continuous series, of
stamped light sheet metal such scales B having their lateral extremities B¹
downwardly diverted so as to be held in position upon the chain and and protect it
from the deposit of dust and exposure. The scales B are preferably formed
with their lateral faces B¹ wider apart to one end B2 that at the other B³ so that
thereby the scales may overlap each other and permit of relative movement in
traversing each of the chain wheels D D¹ while completely covering the chain
upon its outer surface and sides. The scales are preferably secured to the
flexible strip A by rivets a.
The scales B may however, be secured one to the other by the provision there-
upon of respective engaging extremities which on connection in series permit
the passage round the respective chain wheels; or the scales may be secured upon
the underface of a strip of flexible material.

page_text: The strip is provided in a piece and is formed into an endless band by such
means as a leather tongue piece I and buckle J provided upon its respective
extremities. Other means may however be employed or the strip may be formed
as an endless elastic band capable of being sprung on the chain.
For the purpose of completely enclosing the chain and of precluding the deposit
of dust upon its inner surface, I provide a fixed plate E which as suspended from
the lower horizontal member F of the cycle frame by means of clipping brackets G
which may however be provided to be capable of adjustment as illustrated in
Figure 6 where the supporting arms G¹ are held in brackets G2 and are capable
of vertical movement therein to accurately adjust the cover plate E in proper
position the fixture being effected by means of a set screw H as illustrated.
Similarly the cover plate E may be adjusted in length to suit the various lengths
of chain by such. means as the provision of slots f in the extremities of the two
parts of which the cover plate may be composed or in one of such parts as illus-
trated in Figure 8 while a stud g is provided upon the other extremity and
capable of adjustment and fixture into any position therein.
The cover plate E may be provided with lateral flanges ce to embrace the sides
of the scales but so as not to contact therewith as illustrated in Figure 5 or such
flanges may be dispensed with as illustrated in Figure 7.
I do not limit my invention to any particular form of the scales employed nor
to any means of their attachment to the flexible band, now yet to the material
of which the scales may be composed.
Further I do not limit the application of my gear case or protector
to cycles as it is obviously applicable for general use.
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
I claim is:
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1. A case or protector for chain gear consisting of a continuous series of scales
connected one to the other or to a strip of flexible material substantially as
described.
2. A case or protector for chain gear consisting of a continuous series of scales
connected one to the other or to a strip of flexible material each scale having its
sides' wider apart at one end than at the other so that thereby each may overlap
the other in succession substantially as and for the purpose described.
3. A case or protector for chain gear consisting of a continuous series of scales
connected to a strip of flexible material substantially as and for the purpose
herein before described.
4. A case or protector for chain gear consisting of a continuous series of scales
connected one to the other or to a strip of flexible material, and a fixed cover
plate capable of adjustment, in" combination, substantially as described.
5. A case or protector for chain gear substantially as and for the purpose
described and illustrated in the accompanying drawings.
Noted the 90th dow
1000
Doted this 201
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.