DIVING TOT Dicycles, IFICYCIOS, and other Velocipedes, also Applicable to other Purposes.
Year: 1886

page_text: DIVING TOT Dicycles, IFICYCIOS, and other
Velocipedes, also Applicable to other Purposes.
I, JULES TRUFFAULT, of No. 277 Boulevard Péreire, Paris, in the French
Republic, Mechanical Engineer do hereby declare the nature of my said invention
to be as follows:
My Invention relates to improvements in driving mechanism, especially designed
for use in bicycles, tricycles, and other velocipedes, but also applicable to other
machinery in which power has to be transmitted to revolving axles or shafts.
"
The said improvements are based on the fact that when a loose pinion in gear
with a loose bevel wheel is driven round a stationary bevel, wheel of same diameter,
each complete run of said pinion round the latter will impart two revolutions to
the corresponding loose bevel wheel.
The accompanying drawing illustrates the application of my invention to a
'safety" bicycle, the driving wheel whereof is shewn in longitudinal section.
a. a' are the forks provided at their lower ends with ball or other suitable
bearings bb for the axle c to which are keyed or otherwise secured the cranks d. d.
On this axle c. is keyed at z a wheel Z, carrying four pinions C. C₁ C C rotating
on their axles A. A¹ A" A¹, said pinions gearing with the stationary bevel wheel B
and the loose bevel wheel D. The stationary bevel wheel B to which is fitted the
case of bearing b¹ is provided with a metal cap e to exclude dust, mud or grit, and
the wheel B, cap e, plate f, and fork a¹ are secured together by rivets h. h¹ h¹¹ or
otherwise. The stationary bevel wheel D in which is fitted the case of bearing i¹
is screwed at k to the hollow part of the hub m. in the opposite end of which
is fitted the corresponding bearing i. In the periphery of the flanges n. n' of
hub m. are secured the spokes o. o o¹l o¹ll of wheel X with which rotates the
bevel wheel D.
The pinions C. C₁ C C are mounted on the tubular pieces or sleeves p. pl
Pp the extremities whereof are adjusted at one end to the hub, and at the other
to the inner circumference of the pinion carrying wheel Z. These sleeves p. pl
2 p rotate freely on the axles A. A¹ A" A"", each of which passes through the

page_text: rim of the wheel Z and the corresponding sleeve, and is made fast in the hub of
said wheel Z, as shewn in the drawing.
In the rotation of the cranks d d on axle c, the pinions C. OCC mounted
in the carrying wheel Z, as above, gear with the stationary bevel wheel B secured
to fork a¹, and with the loose bevel wheel D imparting to the latter, and con-
sequently to the driving whes of the machine two revolutions for each complete
revolution of the crank axle c. The result is to double the range of the wheel X,
whatever may be its diameter, within practical limits, without having recourse
to the chains, levers and other appliances hitherto employed to that end.
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Applicant's Agent.

page_text: Velocipedes, also Applicable to other Purposes.
I, JULES TRUFFAULT, of No. 277 Boulevard Péreire, Paris, in the French
Republic, 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:-
My Invention relates to improvements in driving mechanism, especially designed
for use in bicycles, tricycles, and other velocipedes, but also applicable to other
machinery in which power has to be transmitted to revolving axles or shafts.
The said improvements are based on the fact that when a loose pinion in gear
with a loose bevel wheel which is driven round a stationary bevel wheel of same
diameter, each complete run of said pinion round the latter will impart two
revolutions to the corresponding loose bevel wheel.
Figure 1. of the accompanying drawing illustrates the application of my invention
to a "safety" bicycle, the driving wheel whereof is shewn in longitudinal section.
a. a are the forks provided at their lower ends with ball or other suitable
bearings b. b for the axle a to which are keyed or otherwise secured the cranks d. d¹.
On this axle c. is keyed at z. a wheel Z. carrying four bevel pinions C. C¹C" Cu
rotating on their axles A. A¹ A" A¹¹¹, said pinions gearing with the stationary
bevel wheel B. and the loose bevel wheel D. The stationary bevel wheel B., to
which is fitted the case of bearing 6' is provided with a metal cap e. to exclude
dust, mud or grit, and the wheel B., cap c., plate f. and fork a. are secured together
by rivets h. h h or otherwise. The bevel wheel D. in which is fitted the case of
bearing is screwed at k. k¹ to the hollow part . of the hub m., in the opposite
end of which is fitted the corresponding bearing i. In the periphery of the
flanges n n n n111 of hub m. are secured the spokes o. o¹ oll ol of wheel X. with
which rotates the bevel wheel D.
The bevel pinions C. C¹ CC are mounted on the tubular pieces or sleeves p.
ppp, the extremities whereof are adjusted at one end to the hub, and at the
other to the inner circumference of the pinion carrying wheel Z. These sleeves 2.
pl p p rotate freely on the axles A. A¹ A" A₁, each of which passes through
the rim of the wheel Z. and the corresponding sleeve, and is made fast in the hub
of said wheel Z., as shewn in the drawing.
In the rotation of the cranks d. d on axle c., the pinions C. C₁₁₁ mounted
in the carrying wheel Z. as above, gear with the stationary bevel wheel B. secured
to fork a', and with the loose bevel wheel D., imparting to the latter, and con-
sequently to the driving wheel of the machine two revolutions for each complete
revolution of the crank axle c. The result is to double the range of the wheel X.,
whatever may be its diameter, within practical limits, without having recourse to
the chains, levers and other appliances hitherto employed to that end.
Figures 2. and 3. represent in plan and section a modification of the above
arrangement, designed to permit of imparting to the driving wheel less than two
revolutions for each revolution of the crank axle.

page_text: In this modification, the two bevel wheels B. and D. and the four bevel pinions C.
CCC, fig. 1., are replaced by a central toothed wheel B. fixed to the cap e. and
gearing with four pinions C. C' CC, the axles q. qq q¹¹ of which revolve in
sleeves or bearings p. p¹ ppl inserted in the cross piece Z. Z. Z. Z. secured to
the crank axle c. of the bicycle. These pinions C. C C C gear in their turn
with the toothed internal circumference D. of the hub m. and drive the machine.
In this arrangement, each revolution of the axle c. carrying with it the pinions C.
CCC rotates the hub m. at a speed corresponding to the number of teeth on
the latter with relation to the number of teeth of the stationary central wheel B.
It will be understood that although four pinions are shewn in the drawings, one,
two, three or other number may be used as required.
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:
1. An improved driving gear for the purposes above indicated, consisting of two
bevel wheels B. and D., one fast and the other loose, meshing with one or more
pinions C. which impart to the loose wheel and parts connected therewith two
revolutions for each complete revolution of the axle carrying the pinion or pinions,
substantially as herein set forth and shewn in figure 1. of the accompanying
drawings.
2. The modified form of said gear, in which the bevel wheels B. and D. and
bevel pinions C. arranged as above, are replaced by a central stationary toothed
wheel B. round which revolve one or more pinions C. gearing therewith and with
the toothed internal circumference D. of the hub m., so as to impart to the latter
less than two revolutions for each revolution of the crank axle, substantially as
herein set forth and shewn in figures 2. and 3. of the accompanying drawings.
Dated this 1st day of November 1886.
PHILIP M. JUSTICE,
Applicants Agent.