An Improved Four-wheeled Bogie.
Year: 1892

page_text: Date of Application, 29th June, 1892
Complete Specification Left, 29th Mar., 1893-Accepted, 2nd June, 1893
PROVISIONAL SPECIFICATION.
An Improved Four-wheeled Bogie.
I, CHARLES ARCHIBALD PARK, of The Gables, Wolverton, in the County of
Bucks, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to a construction and arrangement of four-wheeled
bogie designed to prevent or lessen the peculiar and objectionable vibration usually
transmitted from the bogie frame to the carriage body owing to irregularities in
the rails over which the vehicle travels.
In my improved four-wheeled bogie truck a double bolster upon which the
carriage body is pivotted is arranged midway or thereabout between the two axles
and is constructed with two transverse members each of which rests upon a spring
or springs (that may advantageously be of india-rubber) carried by a swing beam
supported upon knife edge bearings carried by suspension rods which are jointed to
the side portions of the bogie frame between the horn plates, these side portions of
the bogie frame being each stiffened by a tie rod and struts. To compensate for
wear of the sliding or guide plates at opposite sides of the bolster, there is
interposed between each of such sliding or guide plates and the adjacent part of the
bogie frame, two wedge-shaped plates that are capable of adjustment in relation to
each other.
Dated this 29th day of June 1892.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Four-wheeled Bogle.
I, CHARLES ARCHIBALD PARK, of The Gables, Wolverton, in the County of
Bucks, 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 :-
This invention has reference to a construction and arrangement of four-wheeled
bogie designed to prevent or lessen the peculiar and objectionable vibration usually
transmitted from the bogie frame to the carriage body owing to irregularities in
the rails over which the vehicle travels.
In my improved four-wheeled bogie truck a double bolster upon which the
carriage body is pivoted, is arranged midway or thereabout between the two axles
and is constructed with two transverse members each of which rests upon a spring or
springs (that may advantageously be of india-rubber) carried by a swing beam
supported upon knife edge bearings carried by suspension rods which are jointed
directly or indirectly to the side portions of the bogie frame between the horn
plates, these side portions of the bogie frame being each stiffened by a tie rod and
struts. To compensate for wear of the sliding or guide plates at opposite sides or
ends of the bolster, there are interposed between each of such sliding or guide
plates and the adjacent part of the bogie frame, two wedge-shaped plates that
are capable of adjustment in relation to each other.
In the accompanying drawings,
Figs. 1, 2, 3 and 4 are respectively a side elevation, a plan, an end elevation and
a longitudinal vertical section of a four-wheel bogie constructed according to this

page_text: Figs. 5 and 6 are cross sections on the lines A B and C D respectively of
Figure 2.
Figs. 7 and 8 are respectively a plan and a vertical section on the line e f Fig. 7
both to a larger scale than the other figures, illustrating an arrangement of
wedges for taking up wear.
The double bolster shown comprises longitudinal members 1 connected at their
ends by angle irons 2 and plates 3 to transverse members or beams 4. The double
bolster thus formed is arranged about midway between the two axles 5 and carries
a central socket piece 1* upon which the carriage body is pivoted. 6, 6 are swing
beams each supported by two knife-edge bearings 7 carried by suspension rods 8.
These rods are jointed at their upper ends to transverse members 9 secured between
and to the side frames 10, at points between the horn-plates 11 which are connected
and strengthened by the longitudinal bars 12. 6", 6ª are india rubber springs
carried by the swing beams 6 and upon which the transverse members or beams 4
rest so as to support the double-bolster and the part of the carriage body pivoted
thereto. 13, 13, are tie rods arranged at the sides of the truck and each connected
at its ends to the horn plates 11 at the points 13. 14, 14 are struts arranged
between each tie rod 13 and the corresponding longitudinal side member 10 of the
bogie truck so as to support and stiffen the same between the points 15, 15 where
it is supported by india rubber springs 15" suspended from the inner ends of the
metal bearing springs 15". Each tie rod is made in two parts connected at their
adjacent ends by a tightening nut formed with right and left-handed screw threads
to draw the correspondingly formed ends of the part tie rods together and exert
the necessary pressure through the struts to the longitudinal side members 10 of
the truck.
16, 16 are sliding or guide plates fixed to opposite sides or ends of the bolster.
17 and 17 are two wedge shaped plates arranged between each sliding or guide
plate 16 and the adjacent transverse member 9. One of these wedge-shaped plates,
namely 17, is formed with a screw-threaded bolt 17 that passes through a slot in
the adjacent longitudinal side member 10 of the bogie frame and is provided with
nuts 17 whereby its position relatively to the wedge-shaped plate 17ª can be
adjusted in a lateral direction so as to compensate for wear of the sliding or guide
plate 16 and plate 17. The plate 17 is fitted to the transverse member 9 and
both it and the plate 17 are held in place by a bolt 9° that passes through them
and the said transverse member as shown and the head 9 of which lies within a
recess 17 in the plate 17 which is also slotted at 17° to permit of its being adjusted
laterally when desired.
A four wheel bogie constructed as described has five points of support for the
body of a vehicle, viz. one at the centre and one at each corner and therefore
possesses all the advantages of a six wheel bogie with a considerable reduction in
weight as compared with such a bogie.
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. The construction of a four-wheel bogie with a double bolster.
2. The improved four-wheel bogie shown in and described with reference to the
drawings.
3. In a four-wheel bogie constructed with a double bolster, wedge-shaped plates
arranged between each of the sliding or guide plates at opposite sides or ends of
the bolster and the adjacent part of the bogie frame substantially as described and
shown for the purpose specified.
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