IMPROVEMENTS IN DRIVING MECHANISM FOR VELOCIPEDES."
Year: 1881

page_text: LETTERS PATENT to Edward Richard Settle, of Coventry, in the County of
Warwick, for an Invention of "IMPROVEMENTS IN DRIVING MECHANISM
FOR VELOCIPEDES."
PROVISIONAL SPECIFICATION left by the said Edward Richard Settle at
the Office of the Commissioners of Patents on the 20th September 1881.
EDWARD RICHARD SETTLE, of Coventry, in the County of Warwick. "IMPROVE-
MENTS IN DRIVING MECHANISM FOR VELOCIPEDES."
.
This Invention is designed to provide a simple and compact form of double
driving mechanism for tricycles and other velocipedes.
It consists in fitting in the chain wheel a differential barrel of one, two, or more
diameters, carrying a row of studs or pins on its differential peripheries. Attached
to a sleeve carrying one driving wheel is an internally recessed flange, and a
corresponding flange is fitted on its opposite side, keyed on the driving shaft,
passing through the sleeve, the barrel gearing into both flanges.
The chain wheel can be keyed on the driving shaft, in which case the sleeved
driver must be loose, or vice versa.
As long as the machine is running in a straight course equal driving power is
transmitted to both wheels, but in turning, the barrel is carried round (either
forward or backward), allowing either driving wheel to travel faster or slower
than the other. If desired the pins or studs may be on the flanges and the recesses
in the barrel. The pins or studs may be spherical, or in any other form. .
I find the arrangement of double geared barrel materially prevents "backlash,"
as compared with bevel gearing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Richard Settle in the Great Seal Patent Office on the
17th March 1882.
EDWARD RICHARD SETTLE, of Coventry, in the County of Warwick.
MENTS IN DRIVING MECHANISM FOR VELOCIPEDES."
"IMPROVE-
This Invention is designed to provide a simple and compact form of double
driving mechanism for tricycles and other velocipedes. It consists in fitting in the
chain wheel a differential barrel of one, two, or more diameters carrying a row of
studs or pins on its differential peripheries. Attached to a sleeve carrying one
driving wheel is an internally recessed flange, and a corresponding flange is fitted
on its opposite side, keyed in the driving shaft, passing through the sleeve, the
barrel gearing into both flanges.
The chain wheel can be keyed on the driving shaft, in which case the sleeved
driver must be loose, or vice versa.
As long as the machine is running in a straight course equal driving power is
transmitted to both wheels, but in turning, the barrel is carried round (either
forward or backward), allowing either driving wheel to travel faster or slower
than the other. If desired the pins or studs may be on the flanges and the recesses
in the barrel. The pins or studs may be spherical or in any other form. I find
the arrangement of double-geared barrel materially prevents "backlash," as com-
pared with bevel gearing.
And in order that my Invention may be understood and carried into practical
effect, I have annexed the accompanying Drawings to the figures and letters of
reference marked, on which I now refer.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a section taken vertically through my arrangement of driving
mechanism.
.
Fig. 2, a side view of the recessed flange.
Fig. 3, a side view of the chain wheel shewing the differential barrel.
A is the shaft or spindle of one of the 'driving wheels.
B, the hub of the other wheel sleeving thereon; C, a recessed flange forming
part of the hub or attached thereto; D, a similar flange keyed on shaft A; E, the
chain-wheel-loose-on-the-shaft-A, and carrying the differential barrel F furnished
with studs or pins G on its peripheries; H, H, indicate the recesses in the
flanges C, D.
As before described the details of the Invention may be modified as indicated.
Instead of chain gearing I may connect the driven and pedal shafts by inter-
mediate gearing if desired.
Having now described the nature of my said Invention, and the best mode
known to me of carrying it into effect, I wish it to be understood that what I
believe to be novel and original, and desire to secure under the hereinbefore in
part recited Letters Patent is, the improved driving mechanism for velocipedes,
consisting in the combination of the double barrel with the revolving flanges, pins
or studs in the one fitting recesses in the other, substantially as and for the purposes
described.
In witness whereof, I, the said Edward Richard Settle, have hereunto set
my hand and seal, this Sixteenth day of March, in the year of Lord One
thousand eight hundred and eighty two.
EDWARD RICHARD SETTLE. (L.S.)