Improvements in Gear Wheels for Velocipedes.
Year: 1893

page_text: Date of Application, 17th Feb., 1893
Complete Specification Left, 13th Sept., 1893-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Gear Wheels for Velocipedes.
We, EDWARD BARNES, of Whitehead Street, Aston, near the City of
Birmingham, Engineer, and JOSEPH GARRISON, of Witton Road, Aston afore-
said, Tin Plate Worker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to gear wheels, provided with, or having roller teeth, or
teeth made in the form of revolving cylinders or drums, located at or near the
circumference or periphery of a disc or other wheel.
Our invention has for its object, an improved construction of bearing, or other-
wise, the mounting or fitting of the said roller teeth in manner that the same
revolve with great freedom, whilst at the same time, retaining great power or
stay when the same are intergeared, or a roller tooth wheel intergeared with
a toothless annulus, that is, a wheel made in the form of a ring, with the
inner periphery recessed, or formed with sinkings, with which the roller teeth
engage.
According to one form of our invention, we let in within the periphery of a
disc wheel, short roller teeth, with the centres of the same coming a little below
the said periphery, so that the said roller teeth may be retained, or prevented
from falling out of their assigned positions, and which roller teeth are supported
or rest upon balls or spheres, also located within sinkings, formed within the sides
or walls of the primary recesses of the said roller teeth, and with sufficient
clearance between the parts for the whole to move smoothly, and as frictionless as
possible.
Thus, the clearances comprehend the whole of the cylindrical peripheries of the
roller teeth, so that the surfaces of the same only come in contact with ball or
rolling surfaces, which also have ample clearances.
We propose that the roller sinkings in the rim should comprehend only about
the breadth of the rollers, leaving end boundary walls as hoods or shrouds, for
preventing dust gaining access to the rollers from the ends.
Or the rollers may he ball pivoted from their ends, by recessing or sinking
cavities within the middles of the ends of the rollers, and also opposite and opposed
cavities in the walls of the primary sinkings, or in the walls of the carrying plate,
wheel or the like, and letting within the said ends or cavities, balls or spheres,
hence ball pivoted rollers, mounted within elevated bearings, and with all-round
clearances.
We propose that the bearing sinkings or recesses should be angular, so that few
points of contact as possible should be made.
The parts may be made adjustable to take up any defect occasioned by wear, or
the frames, discs, plates or the like may be made sectional or in segments, united
and put together according to the character of the wheel employed.
The said ball-mounted or ball-pivoted roller teeth may be applied for internal
gear, such as annuluses, with driving pinions coming within the inside.
The bearing recesses of the balls may, if necessary, be lined with steel cups, and
lubricants may be supplied in any approved way.
Our improved mounted teeth may be used in conjunction with ordinary toothed
wheels, or wheels having leaves, or our rollers may be mounted within the leaves,
and with the contact surfaces of the rollers standing away from the surfaces of the
parts carrying them.

page_text: As a still further form, the ends of the rollers, which may be ball pivoted or ball
mounted, may take within box ends made in the presented faces of discs, forming the
sides to the wheel, or the sides may be plain, and bolted or otherwise connected
together, and with the ball pivots taking into recesses in the ends of the rollers, and
into the inside faces of the plates respectively.
Our invention is particularly applicable for gear wheels in velocipedes, but is
also applicable for gear wheels for transmitting, communicating or receiving motion
for various purposes.
Dated this 16th day of February 1893
. EDWARD BARNES,
JOSEPH GARRISON,
By Henry Skerrétt,
Agent for Applicants.
1
"
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COMPLETE SPECIFICATION.
Improvements in Gear Wheels for Velocipedes.
We, EDWARD BARNES, of Whitehead Street, Aston, near the City of
Birmingham, Engineer, and JOSEPH GARRISON, of Witton Road, Aston: afore-
said, Tin-plate Worker, 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 speed gear, and to the fitting and mounting of roller
teeth to be employed in connection with gear, as hereinafter described.
Figure 1 of the accompanying drawings represents in longitudinal vertical section,
partly in elevation, speed gear for the driving of cycles, principally of the type
known as geared ordinaries.
The driven wheel has roller teeth, ball mounted or ball pivoted, and with the
same resting within seats sunken within the periphery of a disc made to receive
them. It will also be seen that the whole of the gear, or the driving parts of the
gear directly connected with the crank axle are ball mounted; of the internal order
and adjustable, so as to take up the wear occasioned by the abrasion of the working
'contact surfaces.
"Figure 2 represents a like sectional view as Figure 1, but with a guide bracket
(as. hereinafter described) shown in elevation, and with the pins by which the
adjustment is made, also shown.
Figure 3 represents a transverse vertical section upon the dotted lines A B
Figure 1.
"Figure 4 is a horizontal section upon the dotted lines CD; but with some of the
parts, particularly the box gear, removed, so as to show more clearly, 'the guide
bracket.
Figure 5 shows the box end of one of the forks, and how the adjustment of the
gear is accomplished.
Figure 6 represents the component parts of the gear wheel or the driven wheel
made fast upon a screwed end or 'extension of the hub and Figure 7 represents a
Bide elevation of the wheel without 'the cheeks and roller teeth.
.
It is understood that both sides of the hub are, fitted with like gear, but to
simplify the explanation of the construction of the same, one only will be
referred to.
or
a is the hub of a cycle wheel; each side of which is provided with an
enlarged
drum end a', having a ball race a³, sunken circumferentially within the middle
part of it, and a screwed extension a', which takes within the screwed middle b
of a wheel or pinion b,fitted with ball mounted or ball pivoted röller teeth o.
Thus, these roller teeth fit or take within concaved cross sinkings sunken
2

page_text: within the periphery 6', of the said wheel b, and with the sides of the said roller
teeth e, supported laterally and centrally by ball pivots or ball centres d, taking
partly within the opposite recesses or sinkings c³, of the said rollers, and partly
within the counter-sunk seatings 6, of side plates or cheeks 6, secured in position
by cross screws 66, and which come upon the opposite sides of the said wheel or
disc b, and keep the roller teeth within their assigned seatings.
The peripheries of the said roller teeth bear slightly upon the bottoms of the
seatings or recesses wherein they work, whilst the side ball pivots also assist in
supporting the said rollers, but primarily the said ball pivots take the pressure of
the side thrust from off the plates and from off the rollers.
The said ball-mounted roller wheel is made fast upon the said end o*, by being
screwed in the contrary direction to the direction of the prevailing motion. of
the hub.
This said roller wheel intergears with the she-teeth or cross trough sinkings e³,
formed within the inside periphery e¹, of a box wheel or toothed annulus e, fitting
case like over the principal working parts of the gear as aforesaid, (hence the
internal gear) and with the neck e, which partly surrounds a fixed crank axle
(as hereinafter described) being supported horizontally by ball bearings f, located
and running within a ball race f¹, disposed between the inside end of the neck e,
and an adjustable ball bearing cone g, screwing upon the screwed end 4, of a
stationary crank axle h, carrying at its inner end, a slide and guide bracket h²,
having side walls or straps, with confining end flanges, and which said guide
bracket embraces both the ball-mounted roller and toothed wheel and also the box
terminal end, of the branch i¹, of the fork i.
This said lower terminal end, which has a screwed recess, is fitted with ball
bearings, and a screwed closing cap or cone, so that it will be seen that the
wheel hub is mounted upou main ball bearings carried within the lower extremities
of the branches of the forks, and that such are enclosed within half ball-races,
comprehended by the inside backs of the box ends, the insides of the screw
closure or cone ³, and the concave of the race a³.
Now the guide and slide bracket 2, is supported vertically or laterally by
supplementary ball bearings j, working within half ball-races formed coincidently
within the presented faces of the said part 2, and the inside walls e, of the
box wheel e, respectively, and the said box wheel and parts carried upon the
axle are kept in position, and up to their bearings by a lock nut and washer k, k¹,
and further, the crank is screwed, and made fast upon the outer periphery of the
neck e, of the said box toothed wheel or toothed annulus.
The adjustment of those parts carried by the slide bracket is accomplished
by the rotation of the set pins m, taking through the lug extensions, of the
box terminal ends, of the branches ¹, of the fork i, and with their lower
terminal ends m³, impinging and pressing downwards upon the top side h³, of
the sides or straps h, of the slide bracket, whilst the clamping or affixing of
the said slide bracket and parts carried by it in their adjusted positions is
accomplished by the screwing-up of bolts n², whose screwed ends take through
holes, in the sides, of the slide bracket 2, and into the solid metal of the
box ends, of the branches i¹, as aforesaid, so that as the said roller toothed
wheel is stationary relative to the axle, the screwing up of the bolts m, after the
releasing of the bolt n³, allows the necessary adjustment of the gearing wheels to
be made, after wear, and the said adjustment made complete by the again screwing
up of the screw nuts n².
If necessary, the toothed annulus e, may be fitted with ball mounted or ball
pivoted roller teeth, so that both the driven and the driving toothed wheels are
roller fitted.
Figure 8 represents a modification of the roller toothed wheel.
b is the wheel, with concaved cross sinkings b, c are the roller teeth, with conical
pivot ends d, located and working within the said sinkings, 6' are the side plates
or cheeks with bearings b✦.

page_text: It is understood that we may employ ball mounted roller teeth in connection
with other gear, such as where four or other number of gear wheels are employed,
and that such gear wheels may be inside or outside working.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. In speed gear of cycles, employing in connection with the same, wheels
having ball-mounted or ball-pivoted roller teeth, substantially as described and set
forth.
Secondly. In the teeth of roller-toothed wheels for the speed gear of cycles,
mounting or fitting the same, whether ball or pivot mounted, within cross trough-
shaped seatings or sinkings 6, formed within the peripheries of the said wheels,
substantially as described and set forth.
Thirdly. In roller-toothed wheels for the speed gear of cycles, making up the
same of ball-mounted or pivoted roller teeth c, c, d, working within cross
recesses ³, formed within the periphery b¹, of a wheel b, and kept in position by
side plates or cheeks, having, with the said roller teeth, coincident half ball-
pivot sinkings 2, 6, substantially as described and set forth.
Fourthly. In a toothed annulus or internal gear wheel, consisting of a box-
shaped wheel, having sunken or formed within the inner periphery, semi-circular
recesses e², with intervening solid metal spaces between, substantially as described
and set forth.
Fifthly. In speed gear for cycles, the combination with a roller toothed wheel,
or a ball-pivoted roller toothed wheel, of. a toothed annulus e, e³, mounted upon
a stationary crank axle h, h¹, disposed at a lower plane than the axis of the
hub or driven wheel, substantially as described and set forth.
Sixthly. In speed gear for cycles having ball-pivoted roller teeth, the combina-
tion with the parts laid claim to in the preceding claims of au adjustable
bracket,, *, located at the inner end of a crank axle, and disposed around
the driven wheel or the driving wheel of the hub, and with the same also
located within an internal gear wheel or toothed annulus, substantially as described
and set forth.
Seventhly. In speed gear for cycles, the combination with the particular form
of ball-mounted roller toothed wheels described in the Specification, of the gear
parts, substantially as set forth.
Dated this 7th day of Sentember 1802
EDWARD BARNES,
JOSEPH GARRISON,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicants.