An Improved Adjustment for Handle Bars and Seat Pillars of Cycles.
Year: 1892

page_text: Date of Application, 11th Feb., 1892
Complete Specification Left 11th Nov. 1892-Accepted. 17th Dec.. 1892
PROVISIONAL SPECIFICATION.
An Improved Adjustment for Handle Bars and Seat Pillars of
Cycles.
JOHN ALFRED POOLE 55 Albert Road, South Norwood S.E. Cycle Maker, do
hereby declare the nature of this invention to be as follows :-
By this invention it is intended to wedge open the end of a hollow stemmed
handle-bar or seat-pillar in such a manner as to cause it to fit tightly inside the tubes
usually fitted to cycles to carry these parts. The wedge is made of brass or any
suitable metal and the screw which operates it is made either to fit a special key or
with a hexagonal head.
In the sectional drawing the wedge is shown detached from the screw, in the
elevation it is shown in its place in the stem of the handle-bar or seat-pillar.
The end of the hollow stem is sawn out conically at the same angle as the wedge
and so that the wedge fits tightly then the wedge is drawn into the stem by a bolt
from the top of the handle-bar or seat-pillar and forces the sides of the stem
apart.
The bolt is threaded on the end which passes through the wedge which is tapped
out to fit the bolt.
COMPLETE SPECIFICATION.
An Improved Adjustment for Handle Bars and Seat Pillars of
Cycles.
•
I JOHN ALFRED POOLE, of 55 Albert Road, South Norwood, in the County
of Surrey, Cycle 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 method of fixing the stem of a handle bar
or of a seat pillar to the part adapted to carry it, and it consists in splitting the
extremity of the hollow tube forming the said stem and wedging the same open to
cause it to grip the tube in which it is adapted to be fixed by means of a sliding
wedge actuated by a screw.
In order that my invention may be fully understood I will more particularly
describe it making reference to the accompanying drawing, in which
Figure 1 is a broken view in front elevation-partly in section-showing my
invention as applied to a handle bar stem, and Figure 2 is a view in plan thereof
taken from the underside.
Figures 3 and 4 are views in front elevation-partly in section-and in plan
respectively showing a modification thereof.
Throughout these views similar parts are marked with like letters of reference.
The tubular stem A is split transversely for a short distance from its free end,
and in each side of the said stem is brazed or otherwise fixed wedge-shaped
pieces a, a. Fitting between these wedge-shaped pieces is a wedge B having a
central hole threaded to receive a bolt C passing down through the hollow stem
and actuated by a hexagon or other shaped head bearing on the top of the handle
bar. By turning the bolt C the wedge B is drawn up into the end of the stem A
and thereby expands it causing it to tightly grip the tube or member of the frame
in which it is placed. As a modification a wedge-shaped piece a may be fixed to

page_text: but one side of the interior of the stem A in which case the wedge B is made of a
D-section to fit against the wedge-shaped piece a on the one side, and against the
interior of the tubular stem A on the other side. As a further modification the
tubular stem A instead of being split between the wedge-shaped pieces a, a, may
have the sides of the tube sawn or cut out conically at the same angle as the said 5
wedge-shaped pieces, as shown by. Figure 5 of the accompanying drawing.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction hereinbefore described and illustrated by the accompanying
drawing, but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope of my invention.
-
☐ 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 :--
1. The improved adjustment for the handle bar stems and seat pillars of cycles,
substantially as hereinbefore described and illustrated by the accompanying 1
drawing.
2. In a cycle, the combination of a handle bar stem or seat pillar having one or
more wedge-shaped pieces fixed to its inner surface at its free end and being split
at two or more places for a convenient distance from its free end, of a wedge
adapted to fit in the free end of the stem or pillar and engage with the wedge-
.shaped piece or pieces therein, and of a screw bolt adapted to engage with the said
wedge to actuate it, all combined, arranged, and operating as and for the purpose
set forth.