An Improvement in vipenes.
Year: 1895

page_text: Date of Application, 12th Nov., 1895'
Complete Specification Left, 16th July, 1896-Accepted, 22nd Aug., 1896
An Improvement in vipenes.
I, JOHN SADLER CURGENVEN, Medical Practitioner, of 12, Craven Hill
Gardens, London, W. do hereby declare the nature of this invention to be as
follows:-
It consists of a mechanism mounted on either side of the frame fork of a bicycle
and connected to the wheel axle, whereby a vertical play of the wheel is allowed,
but no lateral movement; also of a small wheel which is mounted 'on either side of
the axle of the wheel proper, & which, by playing up & down a vertical bar fixed
in front of it, counteracts the forward drag of the chain.
The fork of the machine terminates in two slots instead of as at present in one,
placed one above the other, into these are fixed two blocks, with facility for the
tension adjustment of the chain, in the case of the rear wheel.
In each of these blocks there is a vertical hole, through which plays a metal rod,
having.in or about the center of its length an opening into which the bolt of the
wheel axle is fixed. The bolt or spindle used for the wheel axle is long enough to
project well on either side of the wheel and on each side is mounted a small wheel,
either inside or outside the attachment of the bolt to the vortical bar.
Fixed from
the upper to the lower block is a vertical bar or rail, on which the small wheel
impinges & up & down which it plays.
Various forms of springs, for reducing the vibration & jolting of the machine,
can then be interposed either between the upper block & the moveable bar, or the
lower block & moveable bar, or both.
Deted this 12th day of November 1895..
An Improvement in Velocipedes.
I, JOHN SADLER CURGENVEN of 12, Craven Hill Gardens, London, W.,
Medical Practitioner, 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 invention relates to an improved anti-vibration device applicable to the rear
or driven wheel of a bicycle and consists essentially of mechanism mounted on each
side at the termination of the rear portion of the frame and connected to the wheel
axle, whereby the vertical play of the wheel may be controlled by springs of any
suitable type. Suitable mechanism is also provided for allowing the driving chain
to be adjusted.
I will now more particularly describe my invention making reference to the
accompanying drawing in which :-Figure 1 is a view in front elevation of my
improved device and Figure 2 is a plan thereof showing the spring omitted for the
sake of clearness.
Throughout the views similar parts. are marked with like letters of reference.

page_text: .
The rear end of the frame X of the bicycle terminates in a fork shaped lug A,
cach prong a of the lug is slotted at a to receive sliding blocks B, the said blocks
at one of their ends are reduced and pass through the ends of the prongs as
shown. To allow of the blocks B being adjusted in the slots a their reduced
ends b are screw threaded and provided with nuts 6' as shown.
To lock the said blocks in position after adjustment they are provided with
screw threaded projecting pins 6³ and provided with nuts 6ª which engage with the
front face of the prongs a.
On the back of the blocks B at or about their centre are formed eyes b* through
which a rod C is adapted to slide. This rod is furnished at or about its centre
with an eye c through which the axle Y of the rear driven wheel passes and is
secured thereto by nuts in the usual manner. On the top or bottom or both of the
said vertical rod C are arranged suitable springs in such a manner as to control the
movement thereof or absorb the vibration of the rear wheel and prevent it from
being communicated to the frame.
In the accompanying drawing I have shown a series of flat springy plates D
mounted on the top of the upper block B and connected to the top of the rod C by
a strip d but it will be obvious that any shape or construction of spring may
be used.
A rod E is provided for connecting the free ends of the blocks B together, and
to take the strain or tension of the driving chain off the vertical rod C a wheel F
is loosely mounted on the end of the axle Y and is adapted to engage with the said
rod E.
To adjust the tension of the driving chain the outs 64 are slackened and the
necessary adjustment made by means of the nuts b' after which the said nuts 6* are
again tightened.
It will be understood that the above device is required on each side of the
frame.
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 anti-vibration device for velocipedes, coustructed arranged and
adapted to operate in the manner and for the purpose herein before set forth.
Ipated this 16th day of July 1896,
Jated this 16th day of July 1896,
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.1. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.