An Improved Multiplying Speed Gear for Bicycles, applicable also for other purposes.
Year: 1892

page_text: Date of Application, 10th Sept., 1892
Complete Specification Left, 30th Sept., 1892-Accepted, 7th Jan., 1893
PROVISIONAL SPECIFICATION.
An Improved Multiplying Speed Gear for Bicycles, applicable also
for other purposes.
EDMOND JOHN NUGENT 13 Hornby Road Bootle near Liverpool do hereby
declare the nature of this invention to be as follows:-
An improved multiplying speed gear for cycles or other machinery.
Its object is a speed gear revolving on the same centre as the driving shaft or
spindle.
This is gained by having a toothed wheel hollowed to receive the driving shaft
or spindle, the said wheel being fastened to a bracket or fork so as it cannot
revolve.
And by having a pinion revolving round the said toothed wheel, the said pinion
being attached to a crank on a pin or spindle, and revolving on same, the said
crank being attached by being. keyed cottared or otherwise fastened to the driving
shaft or spindle.
And by also having the aforesaid pinion gearing into an internal or annular
toothed wheel, the said internal or annular toothed wheel will have a bearing on
the opposite side of the crank from the toothed wheel that does not revolve, on the
driving shaft or spindle, and in the case of a cycle it will have another bearing
on the hollowed shaft joining the toothed wheel to the bracket or fork, and will
thus form a casing or box over the gear which will prevent the dust from getting
into the teeth etc.
To this box or internal or annular toothed wheel will be attached the spokes in
the case of a bicycle; or in general machinery it will form a pulley for driving
a belt or rope etc.
In a bicycle this gear will be between the forks and in a casing or box to
which the spokes will be attached, which will be a great advantage as you can
build a safety bicycle with the wheels closer together & therefore lighter.
It can also be attached with a change gear for hill climbing.
Dated this the Eighth day of September 1892.
EDMOND JOHN NUGENT.
COMPLETE SPECIFICATION.
An Improved Multiplying Speed Gear for Bicycles, applicable also
for other purposes.
EDMOND JOHN NUGENT 13 Hornby Road Bootle near. Liverpool Mechanical
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 :-

page_text: Explained from Drawing No. 1.
By having A to slide in bearings H.J and K. D to catch a lug attached to F.
C to be thrown out of gear with B by moving A to the right then D will catch
the lug on F and will drive E at the same speed as cranks or shafting revolves.

page_text: for the revolutions of C in going round B. Therefore for one revolution of A,
E will make one and a half, as 24 is the half of 48 which is the number of
teeth in E.
MEANS OF GAINING SPEED, DRAWING No. 2.
Assuming teeth in wheels to be B 36, C 12, C, 24, and E 72.
Then as shown
above C in travelling round B will make three revolutions as 12 is a } of 36 number
of teeth in B, then C, will also make three revolutions and as C, has 24 teeth then
it will have gone 72 teeth; therefore E will have gone one revolution for one of C
round B and also one for the revolutions of C, in going round B.
Therefore for one revolution of A, E will make two revolutions.
This said invention can be made with any sized wheels with any pitch or
lightened in any form necessary, and all parts can be made in any size shape or
form that will suit and can be inade in any metal or material thought fit.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is performed I declare that what I
claim is-
(1) The arrangement of the wheels etc. as a speed gear adapted for bicycles
and to other purposes in machinery and the change gears as described above.
(2) Having a speed gear between the fork or spokes of a bicycle or other
wheel and forming as attached to bicycles in itself a box or covering into which
the dust of a road cannot get.
Dated this 29th day of September 1892.
EDMOND JOHN NUGENT.