A Connection for Converting a Reardriving Safety Bicycle into a Reardriving Safety Tandem Bicycle.
Year: 1893

page_text: Date of Application, 5th Sept., 1893
Complete Specification Left, 27th Sept., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
A Connection for Converting a Reardriving Safety Bicycle into a
Reardriving Safety Tandem Bicycle.
WILLIAM LEANNARD POOLE 44 Melgund Road Highbury Cycle Engineer
ALFRED STONE, Cycle Engineer 15 Glenwood Road, West Green do hereby
declare the nature of this invention to be as follows:-
A connection for converting a reardriving safety bicycle into a reardriving safety
tandem bicycle, by clamping or otherwise fixing a bridge or lugs to the rear fork
ends of the safety bicycle to carry the second crank bracket. Also clamping or
otherwise fixing top bar of connection to make a continuation of top bar of safety
bicycle. Also an adjusting rod to connect the two crank brackets. Machine to be
driven by chain, or connecting rod.
1000
ALFRED STONE.
WILLIAM LEANNARD POOLE.
COMPLETE SPECIFICATION.
A Connection for Converting a Reardriving Safety Bicycle into a
Reardriving Safety Tandem Bicycle.
We WILLIAM LEANNARD POOLE 44 Melgund Road Highbury Cycle Engineer
and ALFRED STONE 15 Glenwood Road, West Green Cycle Engineer 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 connection for converting a rear-driving safety bicycle into a rear-driving
safety tandem bicycle consists of and is an additional frame which can be connected
with the ordinary frame of a rear-driving safety bicycle in manner as is hereinafter
described.
In the accompanying drawing-
Figure 1 is a side elevation of our complete rear-driving safety tandem bicycle
and
Figure 2 is a side elevation of the additional frame which we provide for con-
nection with the ordinary frame of a rear-driving safety bicycle to produce the
rear-driving safety tandem bicycle.
The additional frame consists of the following apparatus. The ordinary two
angled stays or forks are made to pass and be on both sides of the rear wheel on the
angles of which stays are the usual jaws to receive the axle of this wheel and the
ends of the two limbs of these angled stays or forks are connected to and supported
by the upper and lower parts of the seat post as is usual and a bottom bracket is
fitted in the ordinary manner at or to the bottom of the seat post and therewith is
provided the customary crank axle carrying two chain wheels. To and in front of
the upper part of the seat post is connected an horizontal stay of the desired length
which carries in any usual or other manner an handle bar and terminates in a jaw A
while to and in front of the bottom bracket is fitted or connected a short horizontal
stay which terminates with a transverse bar B to the front of which also is
connected a stay most conveniently so constructed in any suitable and customary or
other manner whether telescopically or otherwise as to be adjustable in length or
capable of being shortened or lengthened as may be necessary and this stay
terminates in a jaw C. All the parts of this additional frame are made in such

page_text: styles and of such dimensions and shapes as may be expedient or necessary in
each case so that this frame may properly suit and be complementary to the
particular frame of the rear-driving safety bicycle with which it is to be used.
To connect this additional frame to and with the ordinary frame of a rear-
driving safety bicycle we proceed as follows. The rear wheel of the bicycle and
the axle thereof are removed and into the jaws on the frame. wherefrom this axle
has been so removed is entered the aforesaid transverse bar B and therein the same
is secured by screw nuts or otherwise and the aforesaid jaw C is secured round or
on the lower part of the front seat post a little above the front bottom bracket
while the aforesaid jaw A is secured to the clamp round the upper part of the front
seat post or otherwise is secured or connected round or on or to this seat post in
this position. The rear wheel axle with the wheel thereon is then entered into the
aforesaid jaws made therefor on the rear of this additional frame and therein is
secured in the proper and ordinary or other manner and the rear driving chain is
passed as is usual round a chain wheel on or attached to this rear wheel and one of
the wheels on the rear crank axle while the front driving chain being lengthened
if required so much as may be necessary therefor is passed round the other chain
wheel on the rear crank axle and the chain wheel on the front crank axle and this
our rear-driving safety tandem bicycle so produced as is herein before described is
ready for use.
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
The connection for converting a rear-driving safety bicycle into a rear-driving
safety tandem bicycle substantially as hereinbefore described and shewn in the
accompanying drawing.
Dated this 27th day of September 1893
WILLIAM LEANNARD POOLE.
ALFRED STONE.