Improveme
Year: 1896

page_text: Date of Application, 12th Dec., 1896
Complete Specification Left, 13th Jan., 1897-Accepted, 27th Mar.. 1897
Improveme
I GEORGE HENRY CLAPHAM of 256 Hawthorne Road Bootle near Liverpool
Engineer do hereby declare the nature of this invention to be as follows:-
The object of my invention is to so construct cycles, that the objectionable chain
gearing is dispensed with, and to provide an effective band or other brake encased
out of sight on the pedal shaft.
I employ upon the pedal shaft a spiral worm or screw wheel, gearing into a
smaller spiral gear fixed to a sleeve or tube, on the other end of which is another
small spiral worm, or screw wheel gearing with another larger spiral worm or
screw wheel upon the hub of the back wheel of the machine and so transmits
motion from the pedals to the hub of the back wheel, within the sleeve is a stay
or rod for carrying the said sleeve and for strengthening purposes, the rod is
carried by suitable brackets one of which forms the cover of the large spiral screw
wheel and for a small brake wheel with band or other brake and chain or other
connecting medium which may pass up the tubes to the handle bar.
Or the small spiral worm wheels may be fixed upon the shaft or rod and the
brackets to the sleeve or tube.
Dated this Eleventh day of December 1896.
I, GEORGE HENRY CLAPHAM of 256 Hawthorne Road, Bootle, near Liverpool,
Engineer, 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 my invention is to so construct cycles that the objectional chain
gearing is dispensed with, and to provide an effective band or other brake, encased
out of sight on the pedal shaft.
I employ upon the pedal shaft a spiral, worm or screw wheel, gearing into a
smaller spiral gear fixed to a sleeve or tube, on the other end of which is another
small spiral worm, or screw wheel, gearing with another larger spiral worm or
screw wheel upon the hub of the back wheel of the machine, and so transmitting
motion from the pedals to the hub of the back wheel.
Within the sleeve is a stay or rod for carrying the said sleeve and for
strengthening purposes. The rod is carried by suitable brackets, one of which
forms the cover for the large spiral screw wheel, and for a small brake wheel, with
band, or other brake, and chain or other connecting medium, which may pass up
one of the tubes to the handle bar.
Or the small spiral worm wheels may be fixed upon the shaft or rod, and the
brackets to the sleeve or tube. The small spiral gear wheels have preferably ball
bearings around their under sides.

page_text: DESCRIPTION OF DRAWINGS.
Fig. 1. is an elevation of bicycle with my spiral gear attached, so dispensing with
chain and chain wheels.
Fig. 2, is an enlarged elevation in section of my spiral driving gear, from the
pedal or driving shaft to the axle of the back wheel.
Fig. 3, is an end elevation in section of hub of back wheel, with spiral gear, and
bracket carrying same.
Fig. 4, is an enlarged sectional plan of Fig. 2, shewing section of pedal bracket
with spiral gear wheel in section, also brake wheel on pedal shaft, ball bearings,
and means for securing the same.
Fig. 5, is an end elevation in section of pedal bracket,
Fig. 6, is a front elevation of pedal bracket.
A is the pedal shaft, B is the back wheel hub, B₁ is the back wheel tyre, C is
the front wheel, D is the pedal bracket attached to the tubes E, E, of the machine,
its lower part D' carrying the rod G, and its outer tube or sleeve H, F is the
back hub bracket, attached to the back tube E, of the machine. The pedal
bracket D has bosses J, J into which the tubes E are screwed, or otherwise
secured, its lower ends D2 and D³ support the sleeve H and rod G. Upo the
sleeve is secured the small spiral gear wheel K, gearing into the larger spiral gear
wheel L. upon the pedal shaft. Ball bearings M are provide 1, between the spiral
gear wheel L, and the rod G, which are adjusted by the cone nut M', upon the
screwed end of the rod G. R is a bracket for the stay or rod R¹. Also within
the pedal bracket is a brake wheel N, with band or other brake, which may be
operated by chain or chains from same, passing up one of the tubes E to the
handle bar, ball bearings being also provided at each side of the pedal shaft.
The other end of the sleeve H passes to below the back hub B, and upon it is
fixed another small spiral gear wheel O, with ball bearings M and cone nut M',
the end of the rod G being carried by the bracket F, with suitable nuts or
other means. The spiral gear O gears into the larger spiral gear P, fixed upon
the hub B of the back wheel.
The whole of the spiral gear wheels are preferably encased by the brackets
or by other covers, (which are filled with vaseline to lubricate the wheels) and
which keeps out all dust, and dirt, and protects the clothes of the rider.
The sizes of the spiral gear may be varied proportionally to suit the machine or
rider.
Having now fully 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. In cycles, driving from the pedal shaft, by means of the spiral gear, sleeve,
and rod, to the hub of the back wheel, substantially as shown and described.
2. In cycles, driving from the pedal shaft, by means of spiral gear L, K, O
and P, sleeve H, rod G, with pedal bracket D. and hub bracket F, to the hub B,
of the back wheel, substantially as shown and described.
3. In cycles, placing a band brake wheel upon the pedal shaft, the chain for
operating the said. brake wheel, passing up the tube E to the brake handle,
substantially as shown and described.
Dated this Seventh day of January 1897.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicant.