A New or Improved Appliance for Removing Dust from the Gearing of Bicycles, Tricycles, and the like.
Year: 1896

page_text: Date of Application, 3rd June, 1896-Accepted, 22nd Aug., 1896
COMPLETE SPECIFICATION.
A New or Improved Appliance for Removing Dust from the Gearing
of Bicycles, Tricycles, and the like.
JOHN LLEWELLYN Surgeon 87 Earlsfield Road Wandsworth London S.W.
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 :-
о
Is the application for the purpose of keeping dust from collecting on the chain &
chain-wheels of bicycles and the like, of a circular revolving fan or fans-the
revolution being obtained by the agency of a continuous strap or band passing
from the circumferences of either chain-wheels over drums attached to side portions
of the fans. Thus the same motor-power which drives the bicycle or tricycle
would drive the fan or fans.
The fan is made circular of some strong and light material, as steel, aluminium,
celluloid, papier maché, & the like, & has top & side wings for catching & holding
the air. They revolve on a pin passing at right angles through their centre, this
pin having on it a fixed drum for the cord or band & is itself supported by bearings
(capable of being oiled) attached to a metal arm or support. This arm or support
is made a movable attachment to the tubes or frame of the machine by a screw or
the like & especially to that tube which usually runs from the driving cog wheel
to the smaller chain wheel so that the fans are placed between the two wheels &
between the upper & lower portions of the circular chain & in the same plane to
them.
The fans are of a size to freely clear the chain. At the side of the circumferences
of the driving chain wheel a circular and grooved metal channel is attached, this
being for the reception of the cord or band & from a similar rim or rims on the
lesser chain wheel the cords would run to the drums on the fans. The cord or
band is of gut leather or rubber.
Referring to the annexed drawings
Figure 1 is a side elevation showing my invention in position.
Figure 2 perspective.view of supporting braket.
Figure 3 sectional end elevation showing rotating fan or blower.
a are the driving wheels around which the chain c passes, h being the driving
pedal in the case of a velocipede. g is a grooved rim or wheel attached to the
driving wheel a and around which the band f passes, said band driving the fan o
through the medium of the pulley wheel e, when the machine is in motion being
attached to the spindle p which carries the fan or blower o.
The fan is partially enclosed in a casing d, the whole being carried in a supporting
frame i which is adjustably secured to the plate by means of the thumb screw or
nut j working in the slot k. n is a set screw for securing the plate to the stay
rod m of the machine. By this arrangement the rotation of the fan o causes a
current of air to impinge upon the chain c which current of air blows away dust or
other matter from the chain.
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. The improved device for freeing driving chains from dust and other matter.

page_text: consisting of a rotating fan or blower which blows the dust or other matter away
from the chain, substantially as described and illustrated herein.
Dated this 3rd day of June 1896.
E. EATON,
Agent for Applicant.