Improvements in Railway Waggons.
Year: 1893

page_text: Date of Application, 6th Dec., 1893
Complete Specification Left, 6th Sept., 1894-Accepted, 6th Oct., 1894
We, ADAM PURVIS and WILLIAM PURVIS both of No. 212 Preston Street,
Glasgow, Lanarkshire, Scotland, Engineers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the arrangement or construction of parts for supporting
flexible covers of railway waggons in a simple and easily worked manner.
According to the invention the supporting rod or tube which is bent downwards
at front and back of waggon, has the two ends of said tube fitted into a knee piece
fitting into a socket on front and back end of waggon, so that the said tube is
simply hinged thereat, and top of said tube may be laid on or against either
side of waggon as desired. The vertical ends and horizontal part of said tube are
supported in the upright or middle position by a hinged double sneck or catch piece
on centre of waggon, which allows the vertical part of said tube to fit thereinto and
be retained by the aid of a spring or equivalent thereto.'
Dated this 4th day of December 1893.
DAVID F. MASON, C.E.,
Glasgow, Patent Agent.
Improvements in Railway Waggons.
We, ADAM PURVIS and WILLIAM PURVIS, both of Preston Street, Glasgow,
Lanarkshire, Scotland, Engineers, do hereby declare the nature of this invention
and in what manner the saine is to be performed, to be particularly described and
ascertained in and by the following statement :-
Our said invention relates to the arrangement or combination and construction of
parts of appliances for supporting the tarpaulins or flexible covers of railway
waggons, in a simple and easily worked manner.
And in order that the system, mode or manner in or under which our said
invention is or may be practically carried into effect may be properly understood,
we have appended explanatory drawings whereon the same reference letters indicate
the same or corresponding parts throughout the drawings.
Figure 1 on the drawings represents an end elevation of a railway goods waggon
showing tarpaulin support appliances mechanism arranged, combined and constructed
according to our invention.
Figure 2 represents a side elevation of part of same showing details of our
improved mechanism partly in section, and Fig. 3 a plan of same.
Fig. 4 is a plan of the standard locking device or catch pieces for keeping it
upright.
Fig. 5 is a section of a modified standard guide.
According to our invention the horizontal tarpaulin supporting rod or bar a is
formed with or fixed to the two standard upright flat metal rods bone at each end
of waggon. The said standards or rods b are preferably formed of round, tubular,
or other section of steel or iron, having the top horizontal bar or ridge a of wood,

page_text: с
over which the tarpaulin is spread and supported when in use. Each rod is
preferably of round section at its lower part, or it may be of other suitable section
and slide inside a knee piece or holder d of a corresponding section supported and
swivelling on a trunnion or stem e, fitting in a socket fixed on end of waggon.
The trunnion e has a groove round same into which fits the end of a retaining screw
pin in socket : or in lieu of said pin the stem may be retained in the socket by
an ordinary cutter. The trunnione is thereby kept in the socket and capable of
swivelling therein, so as to allow of the standards being turned or fulcrumed
thereon and the bar a moved across the top of the waggon, or laid on side thereof,
as it and the standards are indicated in dotted lines on Fig. 1. The standards b
have fixed therein a projecting pin g on which turns an antifriction roller c, fitting
into the slot or groove in a preferably circular race or guide plate bolted on ends
of waggon. The slot may be angled upwards towards the centre as indicated by
dotted lines on Fig. 1, or it may be straight. The standards are thereby
supported through the pins g from falling downwards and guided at both ends of
the waggon, and being fulcrumed at the socket causes the bar a to describe a path
across the top of waggon governed by the configuration of the slot or race j. In lieu
of a slotted race or guide plate j and roller c the standards may be fitted as shown
at Fig. 5 with a holder k by the washer and nut m so as to turn or swivel therein.
The holder would embrace and slide on a guide rail n of similar shape lengthwise
to the guide slot ; as before set forth, fixed at both ends on end of waggon with
sufficient clearance to allow holder k to slide thereon. The end standards in their
upright or vertical positions as shown at Figs. 1, 2, 3, and 4, for supporting the
bar a over centre of waggon, are locked or retained therein by two overhanging
snecks or catch pieces n, hinged on the bolt o between the lugs p formed on back of
the centre of guide plate j; or said lugs may be fixed on top of end of waggon. The
outer and lower edges n' of the catches are formed (as shown on the upper catch n¹
which is shown as canted upwards) bevelled or rounded, so that as the standard b. is
pressed or bears against it when said catch is down, the catch n' acted on will be
canted or lifted upwards, thereby allowing the standard b to pass it, when it will
fall back again by its own weight into the position shown by the lower catch »' and
keep the standard from returning. The other catch being down as indicated by
dotted lines, keeps the standard from falling in that direction. The two catches
are normally down, so that as the standard is raised it automatically lifts a catch
and is locked thereby until released by lifting a catch. The two catches formed
as aforesaid may obviously be made in one piece constituting a bifurcated catch;
but the locking action would not be so positive, as the standard might slip past
over the second catch n¹ before it fell back into its normal position.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we would observe that the
horizontal bar a and depending or upright standards being well known, do not
constitute a part of our present invention, but we declare that what we
⚫ claim is.—
1st. The arrangement, construction and combination of waggon tarpaulin or.
covering supporting bar mechanism, as herein before described and shown on
annexed drawings.
the
2nd. A waggon tarpaulin or covering supporting appliance comprising.
horizontal bar a with upright standards in, combination with an arched, angled or
straight race or guide bar or rail n and swivel socket, substantially as and for the
purposes described and shown.
3rd. The automatic standard locking device, consisting of two hinged overhanging
catches, rounded, or bevelled on their outer and bottom edges substantially as and
for the purposes hereinbefore described with reference to and shown at Fig. 4 of
annexed drawings.
4th. In combination with the upright supporting standards of waggon cover

page_text: supporting appliances, a bifurcated catch or locking piece formed with the lower
and outer edges bevelled, or rounded, as and for the purpose herein before set
forth.
Dated this 4th dor of Sentember 1894
D. F. MASON, C.E.,
Glasgow, Patent Agent.