Improved Spring. Frame for Bicycles and Tricycles.
Year: 1891

page_text: Date of Application, 27th Nov., 1891
Complete Specification Left, 27th Aug., 1892-Accepted, 8th Oct.. 1892
PROVISIONAL SPECIFICATION.
Improved Spring. Frame for Bicycles and Tricycles..
STEPHEN JOHN ROSE Bicycle and Tricycle Manufacturer High Street Witney
Oxfordshire. STEPHEN JOHN ROSE do hereby declare the nature of this inven-
tion to be as follows:-
:—
Instead of the usual front forks being continued to the axle of the wheel my
method is to make them a little shorter of tube the lower ends of which are left
open. I provide a second pair of forks the lower ends of which are bent round
and up for a few inches and fitted to slide into the lower ends of the first pair the
wheel axle is connected with the lower end of the bend.
The top ends of the second pair may terminate in one tube sliding through a
larger tube made to fit it fixed to the head of the machine to cause the spring back
I attach two stout coil or other suitable springs which are adjustable to carry
different weights.
Dated this 26th day of November 1891
STEPHEN JOHN ROSE.
COMPLETE SPECIFICATION.
Improved Spring Frame for Bicycles and Tricycles.
I, STEPHEN JOHN ROSE, of High Street, Witney, in the County of Oxford,
Bicycle and Tricycle Manufacturer, 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 :-
My invention relates to an improved spring fork for velocipedes, more especially
applicable to the steering wheels of same, and has for its object the suppression of
vibration.
In describing my invention I will make reference to the accompanying sheet of
drawings on which
Figure 1. is a front view of a steering fork, showing also part of the steering
post, constructed according to my invention.
Figure 2. is a side view thereof, partly in section and
Figure 3. a portion of same in front view drawn to an enlarged scale, also partly
in section.
Throughout these views similar parts are marked with like letters of reference.
Instead of using one tube for each prong of the fork as is usual I use two tubes
placed parallel to each other. A. A. designate two J shaped tubes, the bottom
parts or bends a. a. of which are flattened and adapted to receive the axle of the
wheel. The ends of these tubes are left open the shorter legs taking in to and
capable of sliding or telescoping into the ends of two tubes B. B. which are fixed
or formed in one with the steering post X. and the longer legs of the said
tubes A. A. are adapted to receive short tubes B' B' fixed to the crown b. of the
tubes B. B. These said tubes BB¹ sliding or telescoping into the open ends of
the tubes A. A. and thus acting as guides for the same. The upper or longer ends
of the tubes A. A. are joined together by means of a bridge piece A' from the
centre of which springs a tube or rod C. passing upward through a tube E. which
is fixed by lugs or brackets to the steering post X. This rod C. has its upper
end reduced and screw threaded to receive a cross piece C₁ which is held in
position by means of a nut or similar device. This cross piece C¹ is at its ends
adapted to receive the ends of two or more helical springs D. D. the lower ends
TD027

page_text: of which take into a similar cross piece C². Abutting on the bottom end of the
tube E., and capable of being revolved in any suitable manner on the rod. C., is a
collar provided with a male thread. This collar E passes through the afore-
said crosspiece C² which is provided with a corresponding female thread. It will
thus be seen that by turning the screwed collar El either to the right or left, the
cross piece will either travel down or up and thus increase or diminish the
extension of the. springs D. D. thereby forming a ready means for adapting
the springs to varying weights of riders or to the nature of the ground to be
travelled upon. The action of my improved spring fork is as follows:- When
the wheel meets with an obstacle, the tubes A. A. rise, and as the rod C. is directly
fixed to the tubes A. A. it will rise also, carrying with it the cross piece C¹ which
will cause the springs D. D. to extend and thus control the upward movement of
the said tubes or forks A. A.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is :--
1. In a velocipede, a spring fork constructed as described and shown on the
accompanying drawings.
2. In a spring fork for a velocipede each prong of the said fork consisting of
two tubes capable of sliding or telescoping one within the other and controlled by
two or more springs substantially as described and shown.
Dated this 27th day of August 1892.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.