A Pneumatic Antivibration Device for the Handle or Steering Bar or other Parts of a Velocipede, Autocar, or other Vehicle or Machine.
Year: 1896

page_text: Date of Application, 1st June, 1896
Complete Specification Left. 1st Apr. 1897-Accepted. 1st June, 1897
Date of Application, 1st June, 1896
Complete Specification Left, 1st Apr. 1897-Accepted. 1st June. 1997
NAT
A Pneumatic Antivibration Device for the Handle or Steering Bar
or other Parts of a Velocipede, Autocar, or other Vehicle or
Machine.
I, GEORGE CHAPPELL, of 5 Great Stanhope Street, Mayfair, W. London,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention is intended to provide a simple device which may be fitted to or
within the steering or handle bar of a velocipede, autocar or other vehicle or
machine or in general in such places where vibration is to be overcome or reduced,
such device being adapted to cushion the said handle bar or equivalent part both
upwardly and downward, that is to say, in both directions in the line of its
extension.
Such device presents the advantages of being enclosed and of being fitted to
single, double or triple steering heads or other parts without altering in any
noticeable manner the exterior form and appearance of said parts.
Such handle bars or parts being already made with a downwardly directed
tubular extension, or in the case of triple steering heads made with two parallel
downward extensions, I provide for such extension or each of them a rod which
projects axially into the extension from the fork crown or other base plate. On
this rod I place one or two washers or disks preferably adjustable and so arrange
the tubular extension aforesaid which surrounds the rod that above and below
these washers or disks or washer or disk respectively, there are formed two air
chambers one of which cushions the downward thrust of the handle bar or equivalent
part and the other its upward pull or thrust. These chambers may be formed by
arranging on the disk or disks pistons similar to those in pneumatic pumps or tyre
inflators, or by forming and enclosing suitable inflatable inuer chambers. Valves
are provided by means of which air inay be forced or drawn into the chambers by
use of an ordinary pneumatic pump or tyre inflator, or by up and down movement
of the handle bar or equivalent part itself.
By rendering the intermediate disk or disks, or those which form or support the
opposite ends of the air chambers adjustable, the handle bar or equivalent device
may be rendered adjustable in height.
Springs may be added inside or in addition to the air chambers.
HERBERT HADDAN & Co.,
Agents to Applicant.

page_text: A Pneumatic Antivibration Device for the Handle or Steering Bar
or other Parts of a Velocipede, Autocar, or other Vehicle or
Machine.
I, GEORGE CHAPPELL, of 5 Great Stanhope Street, Mayfair, W., London,
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 :-
This invention is intended to provide a simple device which may be fitted to or
within the steering or handle-bar of a velocipede, autocar or other vehicle or
machine or in general in such places where vibration is to be overcome or reduced,
such device being adapted to cushion the said handle bar or equivalent part
both upwardly and downwardly, that is to say, in both directions in the line of its
extension.
Such device presents the advantages of being enclosed and of being capable
of being fitted to single, double or triple steering-heads or other parts consisting
of two tubes sliding one within the other without altering in any noticeable manner
the exterior form and appearance of said parts.
In the annexed drawing the figure represents in front view the triple steering-
head of a cycle fitted with this improvement.
Such handle-bars or parts being already made with a downwardly directed tubular
extension, or in the case of triple steering-heads made with two parallel downward
extensions, A, I provide for such extension A or each of them a rod B which
projects axially into the extension from the fork-crown G or other base plate.
On this rod B I place one or two washers or disks C, D, preferably adjustable,
and I so arrange the tubular extension A aforesaid which surrounds the rod B that
above and below these washers or disks C, D, or washer or disk respectively, there
are formed two air chambers E, F, one of which cushions the downward thrust of
the handle-bar or equivalent part and the other its upward pull or thrust. These
chambers may be formed by arranging the disk or disks C, D, as pistons similar to
those in pneumatic pumps or tyre inflators, or by forming and enclosing suitable
inflatable inner chambers. Valves are provided by means of which air may be let
out of the chambers E, F, or be forced or drawn into the chambers by use of an
ordinary pneumatic pump or tyre-inflator, or by the up and down movement of the
handle-bar or equivalent part itself.
The rod B may be hollow and closed above while below it communicates with
the tubes H leading to valve J ; at K is a hole in the rod giving communication
between the chamber F and the tubes H and consequently with the valve J.
The extensions A in the construction illustrated slide in the lateral tubes L and
the lower ends of the extensions A are closed as at M to slide on the rod B while
preventing air escaping from the chamber F.
The valve N leads to the chamber E. These valves J and N may be opened
even while riding, to let out air from the chambers F and E respectively, and as
these pressures balance each other the handle may thus be made to ascend
or descend. By pumping more or less air into the chambers E and F the up and
down movement of the handle-bar may be made more or less elastic.
It will be obvious that this invention may be applied in an exactly similar way to
any two tubes one sliding within the other, and special description of these
applications of this device will not be needed.
By rendering the intermediate disk or disks, or those which form or support the

page_text: opposite ends of the air chambers adjustable, the handle bar or equivalent device
may be rendered adjustable in height.
Springs may be added inside of or in addition to the air chambers.
It will be obvious that the tubes L need not be fixed to the fork-crown G but
may be capped at their lower ends and the tubes B may be fixed in these caps, the
whole being carried by the cross-head O having a central tube to be fitted like an
ordinary handle bar in the ordinary single head of a cycle.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In a velocipede, autocar or the like an antivibration device in which elastic
action is obtained in both directions in telescopically sliding tubes, consisting in a
rod or central holder connected to one member and carrying a disk or disks with
pneumatic cushions interposed between the disk or disks and the two ends of
the other member, the said pneumatic cushions balancing one another in tension,
and means for increasing or diminishing the tension in said cushions.
2. The above construction in a handle bar for a triple head or to be fitted in
replacement of an ordinary handle-bar substantially as set forth.
Dated this 1st day of April 1897.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to the Applicant.