Improvements in Roller Gear Wheels for Cycles and the like.
Year: 1898

page_text: Date of Application, 1st July, 1898-Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in Roller Gear Wheels for Cycles and the like.
I, CARL GUSTAV IRENAUS SCHULTZ, of 8, Pelzenstrasse, Hamburg, in the Empire
of Germany, Merchant, 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: —
The object of the present invention is to provide improved roller gearing for
chainless cycles and the like, and it consists generally in a simple and efficient
method of and means for removing and replacing any given roller tooth. In gear
wheels constructed according to the present invention the two flanges carrying
the opposing end of the rollers are keyed on the driving shaft and further brazed
or soldered if required and the rollers are placed in position by passing them
through one flange with specially enlarged and screwed holes so that the inner
bearings of the rollers bed in the other fange and the outer bearings are carried
in a screwed plug or sleeve placed in position in the enlarged holes after the rollers
have been passed through.
Means for carrying the invention into effect are illustrated in the accom-
panying sheet of drawings as follows:-
Figure 1 is an end elevation of the flange carrying the screwed plugs or sleeves.
Figure 2 is a longitudinal section through the complete gear wheel.
On the driving shaft 1 both flanges 11 and 2 are keyed, soldered, brazed or fixed
in any suitable manner. Figure 2 shows the flanges of different diameters as
would be the case when the gear wheels were conical but it is evident that in a
direct drive they would be of equal diameter, though as the invention depends upon
the method of and means for removing or replacing the rollers the drawings
sufficiently illustrate this.
The flange 11 has bearings 5 drilled in it at a suitable angle or parallel with
the shaft 1 as the case may be and within these bearings the turned ends 4 of the
rollers 3 revolve. The flange 2 has enlarged holes drilled and tapped coaxial with
bearings 5 and of such a diameter as to receive the screw plugs 8 and these screw
plugs have bearings 10 formed in them to receive the other turned ends 7 of the
rollers 3. The thread on the plugs 8 and holes 6 is preferably formed of a fine pitch so
as to secure accurate adjustment and to keep the plugs 8 in position when ad-
justed small safety screws are employed. These safety screws 9 are only placed in
position after the plugs 8 have been fitted and it is preferred to drill and tap the
holes for their reception after the first adjustment of all the plugs and rollers in
position.
By the construction hereinbefore described it is evident that any one roller can
be removed and replaced without disturbing any other portion of the gear wheel.
The plugs 8 and safety screws 9 are operated by slots and a screw driver though
it is evident that other devices for removing the plug and screw may be employed
without departing from the subject of the present invention.

page_text: Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is
1. In roller gear wheels for cycles and the like in which two flanges are fixed
upon the driving shaft to carry the respective ends of the rollers providing one
flange with removable plugs and safety screws so that any roller may be removed
and replaced without disturbing any other portion of the wheel, substantially
as hereinbefore described.
2. The improved roller gear wheel with the following essential features in com-
bination, two flanges fixed upon the driving shaft, bearings formed in one flange
to receive the ends of the rollers, removable plugs screwed in the other flange to
permit the rollers to be removed or inserted and when in position to act as bear-
ings from the other ends, and all substantially as hereinbefore described with
reference to the accompanying drawings.
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MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.