Improvements in or relating to Adjustable Handle Bars for Velocipedes.
Year: 1898

page_text: Date of Application, 15th Feb., 1898-Accepted, 9th Apr., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Adjustable Handle Bars for
Velocipedes.
A communication by SAMUEL PALMITER, of 331, East 2nd Street, Jamestown, in
the County of Chautauqua, and State of New York, United States of America,
Mechanic
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, 118, New Street, Birmingham, in the County of
Warwick, and 322, High Holborn, in the County of Middlesex, Civil 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:-
The object of this invention is to provide bicycles, velocipedes and tricycles
with an adjustable handle bar and one that may be adjusted by the rider while
in transit, and the improvement consists in the construction and arrangement of
parts as will be fully understood by this specification and the accompanying draw-
ings, in which,
Figure 1 shows a sectional elevation of bicycle stem and handle bar, having
this invention with connecting threads left open.
Fig. 2 shows stem with handle bar in cross section.
Fig. 3 shows segment of connection drawn together.
In the drawings, 1 is the handle bar, having a ferrule or ring 2 securely fastened
by brazing or otherwise as desired, at the center of the length of the bar and has
a screw thread 3, of suitable size cut in the outer surface; the only difference from
a common thread being that the point or edge of the thread is cut or left off, so as
not to touch the bottom of the thread cut in the head 4 when drawn together as
shown in Fig. 3. 4 is the head of the steering stem 5, which has a corresponding
screw thread cut on its inner side, having the point or edge of the thread cut or
left off, so that when drawn together as shown in Fig. 3, the thread does not touch
the bottom.
The stem 5 of the thread 4 is slotted as shown at 8, (Fig. 2), and has a contract-
ing screw passing at right angles with said slot, one part of the stem serving as
a nut, as shown in Fig. 2 or the screw bolt might pass clear through the stem and
be provided with a nut for drawing the head together, but the mechanism shown
is preferable, as it is not only lighter and cheaper but saves danger from nut being
lost. The screw bolt 6 may have a head large and serrated on its outer edge to better
turn the same, but the head of the bolt is sometimes made much smaller and
put in a pin for turning the screw bolt as shown in Fig. 1, which device gives a
better leverage for turning up the screw bolt. After securing the ferrule to the
handle bar as described, and having cut a thread on the same before fastening on
the handle grips (not shown), the bar thread in the head is turned the full length
of the thread, and these threads should be a close fit when made except the points
or edges of the same as described although an ordinary V thread will answer a

page_text: .
good purpose. Then the handle bar is brought into the desired position and
secured in place by turning up the screw bolt-so as to draw the slotted head
sufficiently together to clamp the threads of the head into the threads of the handle
bar. They will thus impinge on each other and by leaving off the points or edges
on each thread as shown, this can readily be done and made secure whenever
desired. If it is desired to change the position of the bar, the screw bolt is simply
turned back by the lever or pin in the head thus bringing the bar to the desired
position and, securing with the screw bolt as before, all of which can be readily
done by the rider when desired, while on its wheel and in motion.
The screw threads aid in fitting the handle bar into place. The end of the
handle bar is inserted through the clamp and the co-acting screw threads caused
to engage. Rotation of the handle bar will then, through the medium of the
screw threads, draw the handle bar through the clamp into position: Were these
screw threads not provided, the weight of the handle bar would be thrown on the
hands of the operator in fitting the parts together.
71..1
Having, now particularly described and, ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is :-
1: In bicycle handle bars, the combination with the handle bar having a central
enlargement provided with annular screw threads, with their sharp edges removed,
a slotted stem having a head with annular internal screw threads, with their sharp
edges removed, engaging the annular threads of the handle bar enlargement, and
a screw mounted in the stem and adapted to clamp the head around the handle bar
substantially as shown and set forth.
2. In bicycle handle bars, the combination with the handle bar having a central
enlargement provided with annular external screw threads, a slotted stem having
a head with annular internal screw threads, engaging the annular screw threads
of the handle bar enlargement, and a screw mounted in the stem and adapted to
clamp the head around the handle bar, substantially as shown and for the purpose
set forth.
3. In bicycle handle bars, the combination with a handle bar provided with
exterior screw threads at its center,, a split clamp screw threaded interiorly and
embracing the handle bar, and means for securing said split clamp 'upon the
handle bar.
Dated this 14th dox of Fahru 1909