Improvements in or in connection with Safety Looking Bars for Railway Switch and Signalling Apparatus.
Year: 1896

page_text: Date of Application, 21st Dec., 1896-Accepted, 30th Jan., 1897
COMPLETE SPECIFICATION.
Improvements in or in connection with Safety Looking Bars for
Railway Switch and Signalling Apparatus.
I, LEICESTER BRADNEY STEVENS, Engineer, of Darlington Works, Southwark
Bridge Road, in the County of London, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in aud by the following statement:-
This invention has for its object to provido improved means for supporting
safety locking bars employed for railway switch and signalling apparatus and
consists essentially of a bar of suitable cross section placed beside the rail and
mounted on rocking levers free to oscillate about an inclined axis in a bracket
secured to the said rail.
In the accompanying sheet of illustrative drawings: Fig. 1 is a transverse
sectional elevation of one form of safety locking bar with supporting means
constructed according to this invention and Fig. 2 is a side elevation of the same.
Figs. 3 and 4 are transverse sectional elevations of modified arrangements of
Fig. 1.
Referring to Figs. 1 and 2 of the drawings: The angle-iron locking bir a of
obtuse angle cross section and having its upper face horizontal is placed beside the
rail b and mounted on inclined rocking levers c each free to oscillate on a bearing
pin d secured in a bracket e by a split pin and prevented from turning by its
flattened head g fitting in a gap h in the raised print i of the bracket, the said
bracket being secured to the rail by a cap j and bolts as shown. The locking
bar a bears upon a projecting lug m of the lever c to which it is connected by
a pin n, the travel of the said lever being limited by the projecting stops o on the
bracket e.
In the modified arrangement shown in Fig. 3 the wings of the angle iron locking
bar a are at right angles, the upper face being inclined, while in the arrangement
shown in Fig. 4 the upper face of the angle iron is horizontal and bears upon the
end of the rocking levere to which it is connected by an inclined stud pin n
secured to the bar a by a nut p and having an inclined shoulder q as shown.
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. In a safety locking device for railway switch and signalling apparatus, the
combination with a safety locking bar of a supporting rocking lever mounted on an
inclined axis and having a projecting lug for supporting the said bar substantially
as described and for the purpose specified.
2. A safety locking bar for railway switch and signalling apparatus mounted on
inclined rocking levers oscillating about an inclined axis in supporting brackets
secured to the rail, the whole arranged and constructed substantially in the
manner described.
3. The improvements in or in connection with safety locking bars for railway
switch and signalling apparatus, the whole arranged and constructed substantially
as described with reference to the drawings.
Dated this 21st day of December 1896.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.