Improvements in Buffer and other Springs constructed with India Rubber.
Year: 1897

page_text: Date of Application, 17th Feb., 1897
Complete Specification Left, 29th Oct., 1897-Accepted, 4th Dec., 1897
PROVISIONAL SPECIFICATION.
Improvements in Buffer and other Springs constructed with India
Rubber.
I, FRANK SPENCER, of 77 Cannon Street in the City of London, Engineer, do
hereby declare the nature of this invention to be as follows:-
In the specifications of applications for Patents by A. G. Spencer Nos. 7806, 7806*
and 7806 all of the year 1896 are described springs in which there are two or
more concentrically arranged india rubber rings separated by an annulus or annuli
in such a manner as to prevent (when the spring is in compression) their outer
or lateral portions exerting undue pressure against one another or against the
confining or cup ring or rings, when such is or are used, or against the rod (if any)
passing through the spring.
Now according to my present invention I construct a spring with any suitable
number of concentrically arranged loose india rubber rings located between plates
one or both of the adjacent plate faces between which a set of concentric india
rubber rings is sandwiched being formed or provided with annular projections
so arranged as to form for each india rubber ring an annular groove whose walls
are or may be inclined to the axis of the ring so that the bel of the groove is
narrower than its mouth; the form in cross section may resemble a section of
a frustum of a cone. I make the bed of the groove of a width (measured radially)
equal or thereabout to that of the india rubber ring it is to hold, and the inclined
walls of the groove form an abutment or backing adapted to support and receive
the thrust of the india rubber ring.
Springs according to my invention may be variously constructed, the forms of
the plates annular projections grooves and india rubber rings depending on cir-
cumstances. An advantage of such springs is that the component parts are inter-
changeable and that any of them can be readily removed from the remainder
and replaced.
Improvements in Buffer and other Springs constructed with India
Rubber.
I, FRANK SPENCER, of 77 Cannon Street, in, the City of London, Engineer, do
hereby declare the nature of this invention and in what manner the same is to
[Price 8d1

page_text: except it may be the end ones, may be formed with concentrically arranged
grooves 3 on each side so that each plate, excepting the end ones, serves as a
holder or support for two adjacent sets of india rubber rings 1 as shown partly
in longitudinal section and partly in side elevation in Fig. 5.
As will be obvious in some cases one only of a pair of adjacent plate faces need
be grooved, as shown for example in Fig. 6; usually however it will be more
advantageous to groove each face. When in use, springs constructed according
to this invention are suitably held in position by the bodies or parts between
which they are to act as buffers, cushions, draw springs or the like.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. A buffer or other spring constructed with concentrically arranged loose or
separate india rubber rings located between plates one or both of the adjacent
faces of which is or are formed or provided with annular grooves adapted to
receive and hold the india rubber rings at a suitable distance apart, and the
walls of which serve to form an abutment or backing to support and receive the
thrust of the india rubber rings when the same are compressed, substantially as
hereinbefore described.
2. The several constructions of springs comprising two or more loose or separate
concentrically arranged india rubber rings and annularly grooved metal plates
between which said rings are held, hereinbefore described with reference respec-
tively to and shown in Figs. 1 and 2; in Fig. 3; in Fig. 4; in Fig. 5; and in
Fig. 6 of the drawings annexed.
Dated this 20th
J
1002