Improvements in the Construction of Pneumatic Cushions, principally for use in Absorbing or Neutralizing Vibration.
Year: 1897

page_text: Date of Application, 11th Jan., 1897
Complete Specification Left, 11th Nov., 1897-Accepted, 11th Jan., 1898
Improvements in the Construction of Pneumatic Cushions, principally
for use in Absorbing or Neutralizing Vibration.
I, BRUCE GREEN, of 65 and 66, Chancery Lane, W.C., London, Gentleman, do
hereby declare the nature of this invention to be as follows:--
This invention relates to the manufacture of pneumatic cushions and principally
to those used for absorbing or neutralizing vibration for instance in all kinds of
movable vehicles or conveyances, for instance cycles, railway vehicles, road vehicles
and the like.
The invention consists in making such cushions of tubing by taking a tube of
the length required closing the two ends and coiling the said length of tubing into
the form of the cushion required, that is to say so that the coils are in contact with
each other, they being suitably cemented," vulcanized or otherwise connected
together where they are in contact, or enclosed in a canvas or other outer casing
connecting or retaining them in the shape desired as for instance in the form of
a helix or of a spiral or of a double, triple or multiple helix or spiral
with or without a central or axial
free space, but preferably with
such space so that by this construction an annular pneumatic cushion be
may pro-
duced with greater facility, more cheaply and more effectively that when such
cushion is made with an annularly continuous air space within it for the compressed
air.
By such construction moreover I am enabled to combine two or more such
cushions into one system more easily and effectively, reducing the number of
junctions, for instance by taking one length of tubing only, coiling or assembling
a part of such length to form one cushion, coiling or assembling another part of
such length to form a second cushion, and so on, each such coil or assemblage
remaining connected to and in communication with the next by reason of the con-
tinuance of the tubing, the inflating valve being at one end or such valves at both
ends, or any such valve or valves being inserted at any suitable place on the
tubing.
It is obvious that the tubing employed must be strong enough to withstand the
pressure to which it will be subjected and that it must be flexible, and, when
inflated, resilient, to serve the purpose intended.
By varying the method of coiling or assembling the tubing many variations of
form may be given to the resulting cushions according to the purpose each is to
serve.
thi 114 d of Janu 1897
HERBERT HADDAN & Co.,
Agents to Applicant.

page_text: Improvements in the Construction of Pneumatic Cushions, principally
for use in Absorbing or Neutralizing Vibration.
I, BRUCE GREEN, of 65 and 66, Chancery Lane, W.C., London, Gentleman, 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 relates to the manufacture of pneumatic cushions and principally
to those used for absorbing or neutralizing vibration for instance in all kinds of
movable vehicles or conveyances for instance cycles railway vehicles, road vehicles
and the like, in or to which they may be fitted in any manner desirable so as to
support pressure in direction of the axis of the helix of the cushion.
This invention consists in making such cushions of tubing by taking a tube of
the length required, closing the two ends and coiling the same length of tubing
into the form of the cushion required that is to say so that the coils are in contact
with each other, they being suitably cemented, vulcanized, or otherwise connected
together where they are in contact, or enclosed in a canvas or other outer casing
connecting or retaining them in the shape desired as for instance in the form of a
helix or of a spiral or of a double triple or multiple helix or spiral with or without
a central or axial free space but preferably with such space so that by this con-
struction an annular pneumatic cushion may be produced with greater facility,
more cheaply and more effectively than when such cushion is made with an
annularly continuous air space within it for the compressed air.
more such
By such construction moreover I am enabled to combine two or
cushions into one system more easily and effectively reducing the number of
junctions, for instance by taking one length of tubing only, coiling or assembling
a part of such length to form one cushion, coiling or assembling another part of
such length to form a second cushion, and so on, each such coil or assemblage
remaining connected to and in communication with the next by reason of the con-
tinuance of the tubing, the inflating valve when used being at one end or such
valves at both ends, or any such valve or valves being inserted at any suitable place
on the tubing.
It is obvious that the tubing employed must be strong enough to withstand the
pressure to which it will be subjected and that it must be flexible, and when
inflated resilient to serve the purpose intended.
By varying the method of coiling or assembling the tubing many variations of
form may be given to the resulting cushions according to the purpose each is to
serve.
The annexed drawing shows such cushion as applied to the case described in the
specifications of my former Letters Patent No. 29735 dated 24 Dec. 1896, which
employs the resiliency of the cushion in the direction of the axis of the helix.
Fig. 1 being an exterior view. Fig. 2 a plan and Fig. 3 a longitudinal section
thereof. Fig. 4 is a view of the coiled cushion only. Fig. 5 is a section of an
encased cushion.
A represents such cushion made as aforesaid out of a length of tubing closed at
each end and coiled into the form of a helix. If desired the tube may slightly
taper towards one or both ends in order that the end coils may be slightly smaller
as shown at A' in Figs. 3 and 4. B represents with its sliding base B¹ the outer
cup or casing which in this instance is of metal.
Such coil may be made of tubing composed of rubber and canvas so as to be
practically non-extensible, or it may be made of rubber tubing enclosed in canvas
4

page_text: the tube being so enclosed before coiling and cementing or vulcanizing, or it may
be as shown in Fig. 5 coiled and enclosed in a case D of rubber or of canvas or
both or of leather or other suitable material previous to or after vulcanizing such
casing retaining it in shape when inflated.
E represents an inflating valve of any suitable kind placed wherever desired.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same to be performed I declare that what I
claim is:-
1. A pneumatic cushion composed of a tube coiled into the form of one or more
helices and adapted to act resiliently in the direction of the axis of the helix, sub-
stantially as herein described.
2. The combination with a helical tubular cushion of means for employing the
resiliency thereof in the direction of the axis of the helix.
3. The combination with the helical tubular cushion A of the casing comprising
the parts B and B substantially as illustrated and set forth.
4. The combination with a helical tubular cushion A of a casing of rubber
canvas or other suitable material for retaining same in shape substantially as set
forth.
Dated this 11th day of November 1897
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, London.