Improvements in India-rubber Buffer, Draw, and Bearing Springs.
Year: 1889

page_text: Date of Application, 26th July, 1889
Complete Specification Left, 26th Apr., 1890-Accepted, 31st May, 1890
PROVISIONAL SPECIFICATION.
Improvements in India-rubber Buffer, Draw, and Bearing
Springs.
I, ALEXANDER SPENCER, of 77 Cannon Street, in the City of London, Engineer'
do hereby declare the nature of this invention to be as follows:-
My invention has reference to improvements in springs such as referred to in the
Specification of Letters Patent to Alfred George Spencer No. 3906 of the year 1886,
constructed with india rubber and metallic plates, and provided with supplementary
elastic parts arranged in relation to the said plates in such a manner as to relieve
shocks in the event of full compression occurring suddenly so that by means of the
supplementary springs, the contact of cup or dividing plates, or of cup rings with one
another, or with end or dividing plates or of nozzles with plates is eased.
According to my invention instead of constructing a spring with two perforated
cupped plates formed with nozzles and embedded by moulding in the india rubber, I
form a compound ring consisting of two cup rings made without nozzles and arranged
back to back with an india rubber ring (hereinafter called the supplementary spring)
moulded in between them; a groove is moulded in the periphery of the india
rubber cylinder or double cone and the con.pound cup ring is forced into the said
groove.
A groove or projecting bead is moulded in the hole of the india rubber
cylinder or double cone into or onto which, after the spring is vulcanised, there
is forced a metal nozzle of less width than the cup ring. This nozzle may in
some cases be a compound nozzle formed of two metal rings with an india rubber
ring to serve as a supplementary spring moulded in between then after the same
manner as that moulded in between the cup rings, in this case the compound
nozzle is preferably the same width as the compound cup ring.
With springs having compound rings according to my invention, in the event of
full compression occurring and consequent contact of other plates with the cup rings,
there will be a reserve of elasticity to counteract or take up the consequent shock or
shocks after the manner set forth with reference to the constructions of buffer and
other springs described in the Specification of the before mentioned patent of Alfred
George Spencer No. 3906 of the year 1886.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
Improvements in India-rubber Buffer, Draw, and Bearing
Springs.
1, ALEXANDER 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
be performed to be particularly described and ascertained in and by the following
statement:
My invention has reference to improvements in springs such as referred to in the
Specification of Letters Patten to Alfred George Spencer No. 3906 of the year 1886,
constructed with india rubber and metallic plates, and provided with supplementary

page_text: elastic parts arranged in relation to the said plates in such a manner as to relieve
shocks in the event of full compression occurring suddenly so that by means of the
supplementary springs the contact of cup or dividing plates, or of cup rings with one
another, or with end or dividing plates, or of nozzles with plates is eased.
According to my invention instead of constructing a spring with two perforated
cupped piates formed with nozzles and embedded by moulding in the india rubber, I
construct springs as I will now proceed to explain with reference to the accompany-
ing sheet of illustrative drawings in which Figs. 1 and 2 shew respectively in central
As
longitudinal section and in half end view a spring according to my invention.
will be here seen I form a compound ring consisting of two cup rings A and B made
without nozzles and arranged back to back with an india rubber ring (hereinafter
called the supplementary spring) moulded in between them; a groove is moulded at D
in the periphery of the india rubber body E which may have the form of a cylinder
or that of a double cone and the compound cup ring is forced into the said groove as
it is shewn in Fig. 1.
At a groove (or it might be a projecting bead as at FX. in Fig. 3) is moulded
in the hole of the india rubber body E into (or on to) which, after the spring is
vulcanised, there is forced a metal nozzle. This nozzle is shewn as a compound
nozzle formed of two metal rings G, H with an india rubber ring I to serve as a
supplementary spring moulded in between them, after the same manner as that
moulded in between the cup rings; this compound nozzle is shewn the same width as
But the
the compound cup ring, because I consider it advantageous to make it so.
nozzle may in some cases be made in one piece and of less width than the cup ring,
as shewn in Figs. 4 and 5.
In Figs. 6 and 7 I shew a spring in which the cup ring is a simple one, not a
compound one; but in this case the nozzle is a compound one such as that already
described with reference to Figs. 1 and 2.
In the spring shewn in Figs. 8 and 9 the nozzle is dispensed with and the cup ring
is a compound one such as that described with reference to Figs. 1 and 2.
With springs having compound rings (whether made as cup rings or as nozzles)
according to my invention, in the event of full compression occurring and consequent
contact of other plates with the cup rings, there will be a reserve of elasticity to
counteract or take up the consequent shock or shocks after the manner set forth with
reference to the constructions of buffer and other springs described in the Specifica-
tion of the before mentioned patent of Alfred George Spencer No. 3906 of the
year 1886.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is -
1. An india rubber buffer, and draw or bearing spring such as hereinabove
referred to constructed with a compound ring consisting of two cup rings made
without nozzles and arranged back to back with an india rubber ring moulded in
between them, this compound ring being made separate from and being forced into
place upon an india rubber body formed with a groove such as D (fig. 1) to receive
and retain the said compound ring in its proper place on the said body, as hereinabove
described.
2. An india rubber buffer draw or bearing spring such as referred to in the pre-
ceding claim and having a groove or a projecting bead moulded in the hole that
extends through the india rubber body E and a nozzle formed either with a projecting
bead taking into the said groove (as in Fig. 1) or with a groove to receive the
projecting bead of the india rubber body (as in Fig. 3.) the nozzle being in either case
forced into its proper place in the said hole as described.
3. An india rubber draw buffer or bearing spring composed of the several parts

page_text: constructed combined and arranged as shewn in and described with reference to
Figs. 1 and 2.
4. The combination of parts constituting the several modifications of springs
respectively described with reference to and shewn in Figs. 4 and 5; Figs. 6 and 7
and Figs. 8 and 9 of the drawings.
1000
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.