Year: 1888

page_text: I THOMAS B. JEFFERY of Chicago County of Cook, and State of Illinois United
States of America, Mechanical 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 :-
I THOMAS B. JEFFERY of Chicago County of Cook, and State of Illinois United
States of America, Mechanical 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 :-
In the drawings,
Fig. 1 is a plan of my improved handle and a portion of the handle bar to which it
is secured.
Fig. 2 is an axial section through the same.
Fig. 3 is a transverse section at the line ax in Fig. 1.
Fig. 4 is a longitudinal section of a modified form.
Fig. 5 is a transverse section of the same.
A is the handle bar, B an integral rubber handle secured thereon, CC are metal
ferules at the end of the handle B.
Heretofore it has been customary to make handles for velocipedes in the form of a
shell having a single longitudinal cavity through which the handle bar passes, the bar
being secured to the ends of the handle either in the thickened portion formed for that
purpose or in the metal ferule secured upon the handle. It is necessary in order that
the handle should afford the hand convenient grasp that it should be swelled toward
the middle of its length The customary manner of forming rubber handles with an
interior cavity of such shape that the core could not be withdrawn from it, after
moulding as is the case when the handle and therefore the cavity is largest at the
middle is to produce such cavity by placing in the interior of the mould in which the
rubber is to be formed and vulcanized a sufficient quantity of liquid either water or
ammonia being commonly employed which when the mould is closed and the articles
submitted to the vulcanizing process is vapourized by the heat and, expanding, forces
the rubber into the mould so that its exterior surface receives all the impressions and
outlines of the mould and the interior cavity is formed as desired. After the
vulcanizing process is finished, the enclosed vapour or the liquid into which it may be
condensed in the cooling is allowed to escape through any small aperture made for
that purpose. Rubber handles made in this way are found quite liable to breakage
on account of the lack of sufficient power of resistance to exterior pressure at the
middle or most enlarged portion especially when quite cold they are liable to be broken
by any sudden blow.
My invention consists in forming such rubber handle with a rigid diaphragm
dividing the interior space into two or more cavities and constituting a stiffening rib
for the shell.

page_text: In order to make a rubber handle with this improvement, a rubber sheet which
forms the outer shell is laid in the mould in the usual manner, being wrapped around
two pieces which form the ends B¹ B2 of the handle and the third piece B³ which is to
form the stiffening diaphragm or the interior rib. The proper quantity of liquid
being placed in each of the spaces B4 B4 between the ends and the middle diaphragm.
The mould being then closed and vulcanized in the usual manner all the pieces with
the shell unite and the handle becomes entirely integral having three transverse walls,
two being the ends and one the mid partition.
I now drill through all three of these walls longitudinally and allow the liquid or
vapour to escape and through the holes bb¹ and 62 I insert the handle bar A One of
the walls B1, B2 and B³ has its aperture threaded and the handle bar has a corresponding
thread in position to be screwed into the threaded wall and thereby the handle is
secured to the bar suitable stops being provided as a' at the inner end of the handle
and the nut a² at the outer end. I prefer to thread the aperture 6¹ in the outer end
piece B rather than either of the others but I do not limit myself to that construction
The advantage of it however is that the same thread on the handle bar answers to
receive the stop nut a² and further obviated the necessity of making it a raised thread
as it would have to be if it we located so as to correspond with either of the other
apertures since the handle must be applied by inserting it over the end of the handle
bar.
Instead of the transverse diaphragm B³ it may sometimes be desirable to adopt a
longitudinal diaphragm as illustrated in Figs. 4 and 5 the method of construction is
the same as that above described.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is
1. In a velocipede an integral rubber handle having two interior cavities and a
diaphragm separating them substantially as set forth.
2. In a velocipede an integral rubber handle having closed ends and its interior
space subdivided by a diaphragm substantially as set forth.
3. In a velocipede an integral rubber handle swelled at the middle and tapering at
both ends and having near the middle, a transverse diaphragm integral with the shell,
and dividing its interior space into two cavities substantially as set forth.
4. In a velocipede in combination with the handle bar an integral hollow rubber
handle having an interior boss at each end and a transverse diaphragm near the middle
separating its interior space into two cavities substantially as set forth.
5. In a velocipede an integral rubber handle having three transverse walls and two
interior cavities between them and the handle bar passing longitudinally through the
handle and screwed into one of said transverse walls substantially as set forth.
6. In a velocipede, in combination with the handle bar an integral handle having
three transverse walls which form bearings for the handle bar said handle bar being
screwed into one of them substantially as set forth.
7. In a velocipede, in combination with the handle bar an integral rubber handle
having three transverse walls and two interior cavities between then said walls being
each pierced longitudinally and affording a bearing for the handle bar, the outer wall
having its aperture threaded to receive the threaded end of the handle bar substantially
as set forth.