A Chainless Driving Gear for Velocipedes and such like Vehicles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
A Chainless Driving Gear for Velocipedes and such like Vehicles.
BENJAMIN TURNER, 33A, Stafford Street, Walsall, in the County of Stafford,
England, Tailor's Manager, do hereby declare the nature of this invention to be
as follows:-
A small toothed wheel is fixed upon the spindle of the driving wheel of the
velocipede. This wheel gears into and is driven by a larger and internally
toothed wheel, which revolves upon a spindle fixed in the fork at a suitable
distance from the former.
Upon the reverse or untoothed side of the larger wheel and near its edge is
a rim or flange, and in its centre a boss.
Two clamps fit upon the flange by means of a slot cut into the outer end,
the inner end by means of jaws are jointed to a shoulder upon a lever which is
fitted upon the centre boss of the large wheel.
Upon this lever and directly in front of the two clamps are projections carrying
at their extremities a small spring which pressing lightly against the clamps,
causes them to incline slightly backwards.
When pressure is applied to the lever the clamp's are inclined still further
and lock upon the flange, causeing the wheel to follow the direction of the lever.
When the pressure is removed from the lever, the clamp's are liberated and the
lever raised for the next stroke by mean's of a spring attached to an arm at its
back end and to the bottom of the fork.
29th day of November 1897.
A Chainless Driving Gear for Velocipedes and such like Vehicles.
I, BENJAMIN TURNER, of 33A, Stafford Street, Walsall, in the County of
Stafford, Tailor's Manager, 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 has for its object, an improved chainless gear for velocipedes
and such like vehicles by which I provide a new means of propelling cycles
so as to obviate the use of a chain and at the same time be capable of variation
in the gear. My invention is simple in action and easy to manufacture.
In order that my invention may be clearly understood and more easily carried
into practise I have appended a sheet of drawings upon which I have fully
.

page_text: illustrated the nature of my said improvements together with the mode of and
means for carrying the same into effect.
Figure 1 is a view of part of a machine with my invention shewn applied
thereto.
Figure 2 is an enlarged elevation of the gear wheel.
Figure 3 is a sectional elevation of Figure 2.
Figure 4 is a view of the modification shewing the rotary movement.
In carrying my invention into effect the spindle K of the wheel runs in suit-
able bearings provided in the frame M and is provided with the small pinion A
which gears into the large internally toothed wheel B which runs on the stud 61
which is adjustably mounted in the triangular frame m¹ which is a continuation
of the back fork and which is slotted at m² to allow of adjustment and for the
purpose of substituting wheels of large or lesser diameter.
On the outer side of the large tooth wheel B the flange or rim b² is provided
and the boss el bearing the lever E is mounted on the same stud the length
of the lever being regulated in accordance with the gearing as required by its
being "high" or "low." The clutches H are hinged to the boss e¹ of the lever E
and are provided with shoulders h¹ having slots or grooves 2 which loosely fit
on the rim so that when pressure is applied to the lever the ends h³ of the
clutches are displaced and thus cause the slots 2 to engage with and become
locked to the rim b¹ and so carry the wheel B round with them until the pressure
is removed. Projecting arms F are also provided in conjunction with the lever E
so that upon the return upward movement of the lever the shoulders f¹ come in
contact with the clutches H and unlock them thus allowing the wheel B to run
independently of the clutches. The lever E is raised by a coiled or rubber
spring N fixed from the lever E to any suitable part of the frame.
In order to obtain the action of a rotary motion in conjunction with my up &
down action I provide cranks P which are similar to those now in use and which
are mounted in the bottom bracket which is hung from the frame m¹, the
rollers being provided upon the ends of the said pedals R so as to have a
reciprocating movement in the slots e² in the end of the lever et which is made
proportionately longer for the purpose as shewn in Figure 1 by dotted lines e³.
By these means the foot is allowed to take a rotating movement while the lever
has an up and down movement.
I may vary the shape and arrangement of my levers, gear wheels, arms and
clutches without departing from my invention.
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:-
-
1st. In a chainless gear for cycles and such like vehicles the combination of
the clutches H releasing arms F and levers E substantially such as and for the
purpose herein set forth and illustrated upon the accompanying drawings.
2nd. In combination with Claim 1 the means for the adjustment of the relative
positions of the gear wheel centres substantially as and for the purpose herein
set forth and illustrated.
Data
041
7
LEWIS WM. GOOLD,
Agent for Applicant, 5, Corporation Street, Birmingham.