Improved Means for Preventing or Lessening Transmission of Vibration in Railway Carriages or other Vehicles, and other Bodies or Structures.
Year: 1896

page_text: Date of Application, 6th May, 1896
PROVISIONAL SPECIFICATION.
Improved Means for Preventing or Lessening Transmission of
Vibration in Railway Carriages or other Vehicles, and other
Bodies or Structures.
I, JAMES HUNTER ANNANDALE, of Polton Paper Works, Polton, Midlothian,
Paper Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object to lessen vibration and shocks communicated
from the bogie frame or under frame to the body of a railway carriage or other
vehicle or from one part to another of any structure or body subjected to vibratory
movement.
To that end the invention consists in interposing between the supporting part of
a structure or body and the part to be sustained a band or series of bands or straps
of metal or other more or less flexible material stretched over blocks or pads or
protuberances on one part of the structure whilst the other part is fitted with
blocks or pads resting on the band or bands at points between the first mentioned
blocks or pads.
Thus in applying the invention to a railway carriage or other vehicle the carriage
body instead of being supported directly on the under framing or on pads or blocks
thereon is carried by flexible bands or straps of metal or other material stretched
over or otherwise interposed between alternately set pads, cushions or springs on
the top of the under framing and similar pads, cushions or springs on the underside
of the carriage body. The pads are spaced at suitable intervals apart so as to
permit of slight sagging or flexure of the bands under pressure and those on the
upper frame are placed midway or nearly so between those on the under framing
so that the weight of the carriage holds the bands in tension. The bands yield
under any sharp shocks communicated to the under frame in running and the edges
of the pads may also give way so that vibration of the carriage body is in large
measure prevented. Longitudinal and transverse shocks are prevented by carrying
down the sides of the carriage body or extending upwards the under frame and
interposing alternately set pads, cushions or springs with a band or bands stretched
over them in like manner.
In a railway carriage or like vehicle the bands will usually be flat and straight,
but in applying the invention to other structures or bodies the bands may assume
more or less curved contour or even be circular as when applied to wheels, the
band or bands in every case serving as an antivibrating connection or support for
ne part of the structure on the other.
In lieu of employing flat bands carried on pads I may in some cases dispense
vith the pads or cushions by using bands of sinuous or wave-like form interposed
etween the parts of the structure to serve as an elastic cushioning for preventing
ransmission of vibration.
Dated this
1000
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.

page_text: Improved Means for Preventing or Lessening Transmission of
Vibration in Railway Carriages or other Vehicles, and other
Bodies or Structures.
I, JAMES HUNTER ANNANDALE, of Polton Paper Works, Polton, Midlothian,
Paper Manufacturer, 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 for its object to lessen vibration and shocks communicated
from the bogie frame or under frame to the body of a railway carriage or other
vehicle or from one part to another of any structure or body subjected to vibratory
movement.
To that end the invention consists in interposing between the supporting part
of a structure or body and the part to be sustained a band or series of bands or
straps of metal or other more or less flexible material stretched over blocks or
pads or protuberances on one part of the structure whilst the other part is fitted
with blocks or pads resting on the band or bands at points between the first
mentioned blocks or pads.
In the accompanying drawings which illustrate the invention,
Fig. 1 is an elevation of a railway carriage shewing the flexible or antivibrating
band as applied to support the carriage body over the truck or wheel frame,
Fig. 2 is an enlarged view of part of the carriage shewing the same arrangement
of the band.
Fig. 3 is a part end view of Fig. 2.
Figure 4 is a side elevation of part of a bogie carriage shewing the application
thereto o: the antivibrating band, Fig. 5 is a plan and Fig. 6 an end elevation of
the same.
Fig. 7 shews a modification in which the ends of the flexible band or straps are
attached to springs instead of being rigidly connected to the carriage body.
Fig. 8 is a detail hereinafter referred to.
In applying the invention to a railway carriage or other vehicle as indicated by
Figs. 1, 2 and 3 of these drawings, the carriage body A instead of being supported
directly on the under framing B or on pads or blocks thereon is carried by flexible
bands or straps C of metal or other material (one or more at each side of the
carriage) stretched over or otherwise interposed between alternately set pads,
cushions or springs D on the under framing or truck and similar pads, cushions or
springs D on the underside of the carriage body A, the lower pads or springs D
being conveniently carried by an angle iron bar F attached to each side of the
truck or under frame. The pads or springs D, D', are spaced at suitable intervals
apart so as to permit of slight sagging or flexure of the bands C under pressure
and those D' on the upper frame A are placed midway or nearly so between those D
on the under framing B so that the weight of the carriage holds the bands in
tension. The band on each side may be made of a single continuous length or as
shown it may be composed of a number of shorter lengths attached to bracket
ieces G secured on the side of the truck. The bands C yield under any sharp
shocks communicated to the bogie, truck or under frame B in running, and the
springs D, D', or the edges of the pads when such are used may also give way so
that vibration of the carriage body is in large measure prevented. Longitudinal
and transverse shocks may be prevented by carrying down the sides of the carriage
body or extending upwards the under frame and interposing alternately set pads,
cushions or springs with a band or bands stretched over them in like manner.

page_text: When the invention is applied to a bogie carriage as indicated at Figs. 4, 5 and 6.
the Hexible band C is attached to and stretched over a bent beam or bar E carried
on the axle boxes at each side of the carriage the lower pads or springs D being
interposed between this bar and the band C whilst the upper pads or springs D' are
placed between the band and an angle iron bar or beam H on the truck supporting
the carriage body.
The ends of the antivibrating bands may be rigidly secured to the truck or other
part of the carriage, but in order to provide for increased elasticity or resilience of
the hands their ends may be attached to strong springs or buffers either in.
compression or in tension. In such a case the ends of the bands are by preference
carried around rollers I at the ends of the truck and attached to the stems of
buffer pieces J around which springs K are coiled as shown at Figure 7. To
prevent lateral movement of the supporting springs D, D', they are each fitted
with a guide or sleeve L, shewn at Fig. 8, through which the band C passes.
Internal cones M may be fitted within the convolutions of the springs D, D', to
further steady them.
In a railway carriage or like vehicle the bands will usually be flat and straight,
but in applying the invention to other structures or bodies the bands may assume a
more or less curved contour or even be circular as when applied to wheels, the
band or bands in every case serving as an antivibrating connection or support for-
one part of the structure on the other.
In lieu of employing flat bands carried on pads or springs I may in some cases
dispense with the pads or cushions by using bands of sinuous or wave-like form
interposed between the parts of the structure to serve as an elastic cushioning for
preventing transmission of vibration.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved means herein before described with reference to the accompanying
drawings for preventing or lessening transmission of vibration in railway carriages
or other vehicles or structures.
2. In a railway carriage or other vehicle or structure the employment of a
flexible band or bands stretched between the truck, wheel frame or other support
and the carriage body or other part to be sustained in combination with pads
or springs placed between the band or bands and the supporting and sustained
parts substantially as and for the purpose set forth.
3. In a railway carriage or other vehicle or structure the employment of a
sinuous or wave-like band or bands interp.sed between the truck, wheel frame or
other support and the carriage body or other part to be sustained substantially as
and for the purpose set forth.
Dated this 6th day of Waha 1017
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
St. Vincent Street, Glasgow, Agent for the Applicant..