Improvements in Means or Apparatus for_Supporting the Bodies of Railway Vehicles on Bogies.
Year: 1890

page_text: Date of Application, 27th Sept., 1890
Complete Specification Left, 27th July, 1891-Accepted, 5th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for_Supporting the Bodies of
Railway Vehicles on Bogies.
I, ILLIUS AUGUSTUS TIMMIS of No. 2 Great George Street Westminster
London S.W. Civil Engineer, do hereby declare the nature of this invention to be
as follows:-
The objects of my invention are to lessen the vibration caused in travelling over
an uneven road.
Where bogies are used for carrying freight wagons sometimes the supporting
springs are placed over the axle box and sometimes between the bolster and
swinging beam and occasionally they are used in both places and where bogies are
used to carry passenger vehicles the supporting springs are used in several ways.
Over the axle box or on a side beam and also generally between the bolster and a
swinging beam.
With the above named object in view I place three coiled springs at each end of
the swinging beam under the bolster, two of these springs are sufficient.to carry the
dead and the live load (freight or passenger) or practically so and the third spring
which is shorter than the other two, and may be much stronger (or not as is
convenient) comes into play and helps the other two springs to prevent the body of
the vehicle depressing the two springs unduly when passing over a fish plate joint
or other bad or uneven bit of road. It will be clearly understood that if the
springs have a great initial compression and the load is removed or partially so by
any means, especially in the natural oscillation of rapid railway travelling, the
springs then have a natural tendency to regain their normal length and thus tilt
the vehicle up again unduly and thus with springs as ordinarily arranged, the
oscillation caused by rapid travelling combined with a rough or uneven road cause
a great up and down movement or vibration but by putting a shorter spring to
come into play (i.e. into work) when the vehicle is fully loaded, or practically so,
any downward movement of the body of the vehicle consequent on running over an
uneven bit of road is considerably diminished and the following upward or return
movement is likewise lessened.
FirstBy the recoil being lessened and
Secondly: From the fact that the short spring only follows the load through a
very short distance in its upward movement.
Vibration is thus lessened and smooth running increased.
Instead of putting three springs at each end of the bolster I may put any other
convenient number and they may be placed in any position and grouped in any
convenient way or they may be placed one inside the other.
It is not absolutely necessary that the springs should be of different lengths,
they may all be of the same length, in fact the lengths may be arranged in any
way the object I have being that some springs support or practically support the
body of the vehicle and its load and that when the load is on, the other springs are
ready to come into work or have just come into work to assist the other springs in
taking up shocks and uneven running.
I sometimes find it convenient to place a system of springs similar to the above
over the axle boxes.
Instead of putting three springs as explained above I may reverse them and put
one to do the ordinary work and two to do the extraordinary work or I may fit
only two, in fact I do not limit myself to any number but claim the arrangement of
two sets or systems of springs for the objects above named.
Dated this 27th day of September 1890.
MIXTO

page_text: COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Supporting the Bodies of
Railway Vehicles on Bogies.
I ILLIUS AUGUSTUS TIMMIS of No. 2 Great George Street Westminster
London S.W. Civil 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 :-
The objects of my invention are to lessen the vibration caused on travelling over
an uneven road.
Where bogies are used for carrying freight wagons sometimes the supporting
springs are placed over the axle box and sometimes between the bolster and
swinging beam and occasionally they are used to carry passenger vehicles the
supporting springs are used in several ways Over the axle box or on a side beam
and also generally between the bolster and a swinging beam.
With the above named object in view I place three coiled springs at each end of
the swinging beam under the bolster-two of these springs are sufficient to carry
the dead and live load (freight or passenger) or practically so and the third spring
which is shorter than the other two and may be much stronger (or not as is
convenient) comes into play and helps the other two springs to prevent the
body of the vehicle depressing the two springs unduly when passing over a fish
plate joint or other bad or uneven bit of road. It will be clearly understood that
if springs have a great initial compression and the load is removed or partially so
by any means especially in the natural oscillation of rapid railway travelling the
springs then have a natural tendency to regain their normal length and thus tilt the
vehicle up again unduly and thus with springs as ordinarily arranged the oscillation
caused by rapid travelling combined with a rough or uneven road cause a great up
and down movement or vibration but by putting a shorter spring to come into play
(i.e. into work) when the vehicle is fully loaded, or practically so, any downward
movement of the body of the vehicle consequent on running over an uneven bit
of road is considerably diminished and the following upward or return movement is
likewise lessened.
First By the recoil being lessened and
Secondly: From the fact that the short spring only follows the load through a
very short distance in its upward movement.
Vibration is thus lessened and smooth running increased.
Instead of putting three springs at each end of the bolster I may put any other
convenient number and they may be placed in any position and grouped in any
convenient way or they may be placed one inside the other.
It is not absolutely necessary that the springs should be of different lengths they
may all be of the same length in fact the lengths may be arranged in any way—the
object I have being that some springs support or practically support the body of
the vehicle and its load and that when the load is on the other springs are ready to
come into work or have just come into work to assist the other springs in taking up
shocks and uneven running.
I sometimes find it convenient to place a system of springs similar to the above
over the axle boxes. Instead of putting three springs as explained above I may
reverse them and put one to do the ordinary work and two to do the extraordinary
work or I may fit only two-in fact I do not limit myself to any number but claim
the arrangement of two sets or systems of springs for the objects above named.

page_text: The three springs shown in Fig. 3 are arranged so that the two outer ones A. A
support the body of the vehicle and its load and then the third spring B is just in
play. The reasons for this arrangement are stated hereinbefore. Fig. 2 shows
these springs in cross section and Fig. 1 shows the springs A. A. At Fig. I may
also be seen an arrangement of springs over the axle boxes, carrying out the same
principle. A' A' practically support the load and B₁ only just then comes into
play. It is evident that the springs which support the load (say A. A and A' A')
may be one, two or more springs and so also may the other or auxiliary springs B
or B'. The object being to give an easy riding motion with a minimum of down-
ward deflection under shocks and a consequent minimum upward recoil.
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
:--
First An arrangement of coiled springs under the bolster of a bogie consisting
of two systems. The one supporting the load and the other preventing excessive
vibration when running substantially as and for the purposes hereinbefore
described.
Secondly An arrangement of coiled springs over the axle box of a bogic
consisting of two systems. The one supporting the load and the other preventing
excessive vibration when running substantially as and for the purposes hereinbefore
described.