An Improved Convertible Tandem Bicycle Frame and Pedals.
Year: 1897

page_text: Date of Application, 17th Nov., 1897-Accepted, 22nd Jan., 1898
COMPLETE SPECIFICATION.
An Improved Convertible Tandem Bicycle Frame and Pedals.
FREDERICK JOHN TINKER, (Engineers' Pattern Maker), and ARTHUR FREDERICK
TINKER, (Accountant), both of 98 Allison Road, Harringay Park, London, N., 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:
-
Our elevational drawings furnished herewith represent an Improved Convertible
Tandem Bicycle Frame with Pedals attached.
The parts marked A & C represent the handle bars and saddle for the front rider
and those marked B & D represent the handle bars and Saddle for the rear rider.
E defines a convertible bar which can be removed. N represents a front stay to
the head of machine and adjusted so as to accomodate a lady rider when top bar E
is removed. The stay bars marked C & D support the saddles marked C & D.
The stays marked F & G form the main support of the Frame and is supported
in turn by its connection with the Axle bearing of the driving wheel.
The small stays marked H help to divert the strain on the lower part of the frame
to the stays F & G. The cranked part of the frame marked I is so constructed as
to admit of our special Driving Mechanism.
J is a small removable Bar which helps to evenly distribute the weight of the
rear rider across the cranked part of the frame marked I and so along the lower
bar of the frame.
The extensional part of the frame marked L is to carry the small wheel Mat
the rear of the machine for use when necessary as an emergency wheel, to prevent
any possible backward tilt to the machine.
The Levers marked (a) carry the Pedals at their extremities marked K. We
here submit Drawings of three full sized views of Pedals referred to in sheets
numbered 3 and 4. The view A represents plan of Pedal shewing foot surface,
section of ball bearing, and its connection with the forked part of the lever
marked K.
View B represents elevation of Pedal and its connection with the forked part of
lever marked K.
View C shews End Elevation and its connection likewise with forked part of
lever K.
This Pedal which we illustrate in our drawing does not revolve; but oscillates
according to the movement of levers.
Having now particularly described and ascertained the nature of our in-
vention, and in what manner the same is to be performed, we declare that what we
claim is:
First. We claim for this our invention as shewn in our drawings furnished here-
with that it is an Improved Convertible Tandem Bicycle Frame and Pedals specially
constructed for the use and working of our Mechanical Bevel Gear Lever Driving
Patent No. 28,494 of December 12/1896.

page_text: Second. We also claim the right of manufacturing this Frame and Pedals, with
or without, the parts of Frame marked L; and the small emergency wheel
marked M, as shewn and particularised in the drawings furnished by us in our
Complete Specification of this date.
Third. The general construction arrangement and combination of parts of this
Improved Convertible Tandem Bicycle Frame and Pedals substantially described,
duly set forth by us, and fully illustrated in our drawings furnished by us in this
our Complete Specification.
Dated this Seventeenth day of November One thousand eight hundred and
ninety-seven.
FREDERICK JOHN TINKER and
ARTHUR FREDERICK TINKER.