Improvements in Bogies for Rolling Stock.
Year: 1895

page_text: Date of Application, 16th Dec., 1895
Complete Specification Left, 15th Sept., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Bogies for Rolling Stock.
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:-
In a bogie according to this invention, the bolster is constructed with upper and
lower parts with interposed springs which may be of any suitable kind.
In one construction, the lower portion of the bolster is built up of metal rolled
to form, the bottom being of a cross sectional form somewhat resembling a bridge
rail and the two sides each of a channelled section with a metal frame super-
posed that receives and surrounds the top of the bolster which is a plate adapted
at its centre to form the lower centre plate of the swivel and at its lower
part to enter between those portions of the sides of the bolster formed by the metal
of channelled section. Between the underside of the top plate and the upper side
of the bottom, springs are interposed which may be annular springs of india rubber
with metal rings cast therein and kept in place by studs or pins projecting into
their central holes from the bottom of the bolster.
This construction can be varied without departure from the characteristic feature
of my invention as set forth above.
J, 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 :-
In a bogie according to this invention, the bolster is constructed with upper and
lower parts with interposed springs which may be of any suitable kind.
Figs. 1 2 and 3 of the accompanying drawings show respectively in part side
elevation, part plan and cross section, one construction of bolster according to this
invention.
In this construction, the lower portion of the bolster is built up of metal rolled
to form, the bottom 1 being of a cross sectional form somewhat resembling a bridge
rail and the two sides 2 2 being each of a channelled section with a rectangular
metal frame 3 superposed that receives and surrounds the top of the bolster which
is a plate 4 adapted at its centre to form or, as shown, to carry, the lower centre
plate 4 of the swivel and at its lower part to enter between the two sides 2, 2* of
the lower portion of the bolster. The metal frame 3 is made of angle iron rivetted
or otherwise secured to the top flanges of the two sides 2, 2*, the lower flanges of

page_text: which are similarly secured to the bottom 1. Between the underside of the top
plate 4 and the upper side of the bottom 1, springs are interposed which may, as
shown, be annular springs 5 of india rubber with metal rings 5* cast therein and
kept in place by studs or pins 6 projecting into their central holes from the bottom 1
of the bolster. This construction can be varied without departure from the
characteristic feature of my invention as set forth above. Thus instead of india
rubber springs, coiled metal springs, or laminated metal springs may be used.
Also instead of the springs being arranged singly as shown, they may be arranged
in nests or groups. In either case the springs may be arranged at intervals
along the length of the bolster, or only at the centre and the two ends thereof.
Fig. 4 is a cross section of a bogie fitted with a bolster of the kind hereinbefore
described, the bogie in other respects being similar in construction to one of the
bogies described and shown in the Specification of a prior Patent granted to me
No. 5526 of 1895.
By the use of compound bolsters constructed as herein before described, a greater
cushioning action is obtained than usual with the result that the transmission of
shocks from the wheels of the bogie to the body of the vehicle carried thereby is
reduced.
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. In a bogie for rolling stock, a bolster constructed with upper and lower parts
with interposed springs substantially as hereinabove described.
2. In a bogie, a bolster constructed substantially as described and shown.
Dated this 15th day of September 1896.