Improvements in Multiplying Driving Gear.
Year: 1893

page_text: Date of Application, 20th Jan., 1893
Complete Specification Left, 25th Sept., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Multiplying Driving Gear.
I, CECIL WAGENER HOLMES, of Friday Street, Leicester, in the County of
Leicester, Cycle Manufacturer, do hereby declare the nature of this invention to
be as follows:-
This invention relates to multiplying driving gear applicable to vehicles and
particularly to cycles, and I will describe it as applied to a bicycle of the type
known as a geared ordinary or front driving safety.
In carrying out the invention I form the running wheel of the bicycle with a
hollow hub through which runs an axle not directly connected with the hub and
carrying a crank at each end. This axle passes through bearings in the fork ends
one of which extends internally and carries a fixed wheel preferably a bevel or
mitre wheel. A corresponding bevel or mitre wheel is secured in any convenient
manner but preferably by cylindrical internal extension upon the inside of the hub
of the running wheel while the axle carries one or more conveniently two bevel or
mitre wheels each adapted to engage with both the previously described bevel or
mitre wheels so that as the wheels are carried round by the axle they engage upon
one side with the fixed wheel inside the hub and upon the other with the wheel
secured to the hub and consequently carry the hub round at a faster speed than
that at which the axle itself revolves as will be well understood.
The wheels which revolve with the axle are carried in a cage or special bracket
which may be keyed or otherwise secured to the axle and is so arranged that the
bearings of the axle wheels are supported at both ends instead of merely at the
inner end as has hitherto been proposed.
The whole of the bearings or working surfaces in this apparatus I prefer to make
of the well known ball-bearing type and to provide means for adjusting the whole
of these, and to so arrange the bearings of the axle wheels that I can as well as
taking up wear in the bearings take up the wear in the teeth of the gearing by
allowing the latter to be moved inwardly towards the axle.
Dated this 20th day of January 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Multiplying Driving Gear.
I, CECIL WAGENER HOLMES of Friday Street, Leicester, in the County of
Leicester, Cycle Manufacturer, 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 :-
This invention relates to multiplying driving gear applicable to vehicles and
particularly to cycles, and I will describe it as applied to a bicycle of the type
known as a geared ordinary or front driving safety.
In carrying out the invention I form the running wheel of the bicycle with a
hollow hub through which runs an axle not directly connected with the hub and
carrying a crank at each end.. This axle passes through bearings in the fork ends
one of which extends internally and carries a fixed wheel preferably a bevel or
mitre wheel. A corresponding bevel or mitre wheel is secured in any convenient
manner but preferably by a cylindrical internal extension upon the inside of the
hub of the running wheel while the axle carries one or more conveniently two bevel
Prime 8dl

page_text: or mitre wheels each adapted to engage with both the previously described bevel
or mitre wheels so that as the wheels are carried round by the axle they engage
upon one side with the fixed wheel inside the hub and upon the other with the wheel
secured to the bub and consequently carry the hub round at a faster speed than
that at which the axle itself revolves as will be well understood.
The wheels which revolve with the axle are carried in a cage or special bracket
which may be keyed or otherwise secured to the axle and is so arranged that the
bearings of the axle wheels are supported at both ends instead of merely at the
inner end as has hitherto been proposed.
The whole of the bearings or working surfaces in this apparatus I prefer to
make of the well known ball-bearing type and to provide means for adjusting the
whole of these, and to so arrange the bearings of the axle wheels that I can as well.
as taking up wear in the bearings take up the wear in the teeth of the gearing by
allowing the latter to be moved inwardly towards the axle.
In the accompanying drawings,
Figure 1 is a vertical longitudinal section through the complete gear.
Figure 2 is a vertical cross section through the same upon the line 2-2 of:
Figure 1.
Figure 3 is a similar view to Figure 1 showing a modification, and
Figure 4 is a similar view to Figure 2 but showing a modification; it is taken
upon the line 4-4 of Figure 3.
'
Like letters represent like parts throughout the drawings.
A is a crank axle carried in the fork ends B B' by ball bearings C in the usual
and well known manner, no further description of these parts being necessary.
D is the hub of the road wheel made in the form of a hollow box with open ends
which are closed by circular end pieces E and F screwed into it or secured in any
convenient manner as by means of lugs D' projecting upon the inside of the hub Ď
and screws E' passing through the end pieces E and F and screwing into the
lugs D. The screws E' at one end of the hub may be rivetted over so as to make
a permanent fastening while those at the other end are not rivetted so that they
can be unscrewed from the outside for the purpose of removing the detachable end
to give access to the interior.
The end piece E at the left hand of the drawing, Figure 1 is carried down to
near the axle A and carries the cylindrical extension E' upon which is fixed in any
suitable manner the bevel wheel G which revolves with the hub D. The end
piece F does not carry a bevel wheel but is suitably shaped to carry the hardened
bearing cup F, forming a ball race for the set of balls F2 whose other bearing is
upon the hardened cup B2 of the fork end B'. This forms the ball bearing for one
end of the hub the other bearing being formed by similar hardened cups E³ and B'
carried respectively by the end piece E and the fork end B at that end of the hub;
these two bearings carry the hub D and enable it to revolve upon the fork ends.
As the axle A has also to revolve in the fork ends the ball bearings Calready
referred to are provided in each fork end the tightening up of all four bearings
being effected by the cones H screwing upon each end of the axle A and adapted
to be held in place in a well known manner by a lock secured upon each crank the
lock being preferably fixed by a screw so that it can be withdrawn from the cones H
to allow of their being turned when it is necessary to tighten up or slacken the
bearings. The fork ends B B will spring sufficiently to allow for wear in the hub
bearings. It will be observed that in these bearings the cones H enter well into
the recesses in the fork ends B B¹ while the latter similarly enter the recesses in
the hub ends E and F so as to exclude the dust as much as possible.
Upon the axle A is keyed or otherwise secured the cage I, (or this may be
formed of the same piece of metal as the axle) which is preferably made of a steel
casting having openings I¹ to accommodate the bevel wheels J carried by the
bracket. These bevel wheels J as shown in Figures 1 and
upon axle
pins K screwed into the boss or centre of the cage I and having heads K' to
prevent the wheels J from escaping. Little screw pins L are let into a portion of
are carried

page_text: the heads K'so as to prevent the axle pins K from coming unscrewed. To provide
a hardened plane bearing for the wheels J I prefer to insert in each wheel a hard
steel bushing M bored to fit the axle pins K each having a collar M' fitting into a
suitable recess in the wheel J. A loose washer N may be placed upon the axle
These loose washers
pins K between each wheel J and the boss of the cage I.
may be thinned down or entirely removed and the same reduced or other washers
placed on the pins K between the cage I and the wheels J, when it is desired to
approach the said wheels nearer to one another for the purpose of taking up wear
in the gear.
The fork end B' is extended inwards towards the centre of the hub presenting a
cylindrical extension or sleeve B' within which the axle A revolves freely as it
does also inside the extension E of the hub end E and upon this extension B³ is
fixed a bevel wheel O similar to the bevel wheel G carried upon the end piece E.
The wheels J which by the cage I and axle pins K are carried round with the
axle A both engage with the wheel O, which being fixed to the fork end B' does not
rotate, and with the other wheel G, which being fixed to the hub and revolving
with it is carried round with the motion of translation at an increased speed when
revolved by the cranks which are placed upon its extended ends A! in the usual
manner.
In the modification shown in Figures 3 and 4 the end pieces E and F are shown
screwed into the hub a key P being placed in recesses cut in the threads of both
the end pieces and the hub to keep the former from coming loose; the keys Pare
secured by screwed pins P¹ so that the keys can be taken out when required to
allow of the removal of the end pieces. If desired one end piece may be made
tight or sweated in or otherwise secured in a permanent manner.
The general
arrangements of this modification are the same as those previously described the
difference relating to the manner of carrying the bevel wheels J each of which has
an extended boss or sleeve J¹ fitting freely in a hole bored through the axle
perpendicular to its axis and screwed axle pin K passing through the wheels J and
carrying at one end a head K' formed as a ball race and at the other a coned
nut K' screwing on to the axle pin K and fixed by a lock nut K. The wheels J
are recessed so as to provide the necessary ball races in which lie the rings of
balls K; hardened steel cups may if desired be provided in the wheels J to receive
the balls K⭑.
The nut.K has a milled edge K* for convenience in adjusting it.
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. The combination and arrangement of parts constituting the complete driving
gear substantially as described and illustrated in Figures 1 and 2 of the accom-
panying drawings.
2. The combination and arrangement of parts constituting the complete driving
gear substantially as described and illustrated in Figures 3 and 4 of the accom-
panying drawings.
3. In driving gear the combination with the driving axle of a cage such as I
having openings such as 11 to accommodate the gear wheel and axle pins supported in
the outer and inner portions of the cage substantially as described and illustrated
in the accompanying drawings.
Dated this 14th day of September 1893.