An Improvement applicable to Bicycles, Tricycles, and other Velocipedes.
Year: 1893

page_text: Date of Application, 7th July, 1893
Complete Specification Left, 6th Apr., 1894-Accepted, 16th June, 1894
An Improvement applicable to Bicycles, Tricycles, and other
Velocipedes.
I ARTHUR OCTAVIUS COLLIER of 43 Lower Mosley Street Manchester in the
County of Lancaster, Cycle Agent, do hereby declare the nature of this invention
to be as follows:-
This invention relates to an improvement upon an invention for which Letters
Patent were granted to Septimus John Collier dated the 29th day of May 1889
No. 8893 and the object of the present invention is to enable the rider of a bicycle
tricycle or other velocipede to put on an increased speed when desirable.
In carrying out my invention I fix the annular stud or internal toothed wheel
(instead of the toothed chain wheel) fast upon the crank axle which is driven by
the pedals.
The driving stud wheel is cast in one piece with the central spur wheel and turns
on a cylinder which is mounted so as to be capable of revolving in a boss formed in
the frame. The ends of this cylinder are bored excentric and through this passes
the crank shaft.
The cylinder is provided with a sliding bolt which connects and disconnects the
stud or internal wheel with the cylinder.
When they are connected the whole revolves together at the normal speed of
the pedals and cranks which then drive direct, but when they are disconnected the
cranks drive the toothed chain wheel through the gear at an increased speed.
The normal position is with the bolt in gear and driving direct and it is
ordinarily held in this position by means of a spring.
The spring bolt is withdrawn by means of a lever provided with an inclined
plane which comes in the way of a projection on the bolt and withdraws it. At
the top of the incline is a notch into which the projection falls and thus prevents
the cylinder from revolving.
The inclined lever is thrown in or out of the way by a rod moved by a
trigger placed on the top bar of the frame within easy reach of the hand of
the rider.
.
تيم
1
1000
The correct: Drawing (with TRAW Fig. 3) accompanying thi
Specification is in accordance with the Comptroller-fienend's decision of
the 1st December, 1891.

page_text: The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the sheet of illustrative drawings hereunto annexed and the following explanation
thereof.
Fig. 1 is a vertical section on the line A-B and Fig. 2 a horizontal section on
the line C-D of my improved gear.
Fig. 3 illustrates the action of the spring bolt hereinafter referred to.
In carrying out my invention I fix or form the annular stud wheel a (or it may
be an internal toothed wheel) fast upon the crank axle b which is driven by the
pedals, instead of fixing the toothed chain wheel c thereon.
The driving chain wheel c is cast in one piece with or bolted to the central spur
wheel d, and turns on a cylinder e which is mounted so as to be capable of revolving
in a boss forming part of the frame (see Fig. 3).
The ends of this cylinder e are bored excentric and through this passes the
crank axle b.
The cylinder e is provided with a sliding bolt 9 which connects or disconnects
the stud (or internal toothed) wheel a with the cylinder e. When they are
connected the whole revolves together at the normal speed of the pedals and
cranks 6 when driven direct, but when they are disconnected the cranks b¹ drive
the toothed chain wheel c through the gear at an increased speed.
The normal position is with the bolt g in gear, and driving direct, and it is
ordinarily held in this position by the coiled spring h..
The spring bolt g is withdrawn by means of a lever i provided with an inclined
plane which comes in the way of a projection g* on the bolt and withdraws it.
At the top of the incline is a notch & into which the projection g* falls and thus
prevents the cylinder e from revolving.
The inclined lever i is thrown in or out of the way of the bolt head g* by a rod l
moved by a trigger placed on the top bar of the frame within easy reach of the
hand of the rider.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The improved speed gear for bicycles, tricycles, and other velocipedes constructed,
applied and operating substantially as hereinbefore described and illustrated by the
drawings annexed.
5th day of April 1894.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.