The Viaduct Works' Handbook
Forfatter: Henry N. Maynard
År: 1868
Forlag: E. And F. N. Spon
Sted: London
Sider: 108
UDK: 624.3
Being A Collection Of Examples From Actual Practice Of Viaducts, Bridges, Roofs, And Other Structures In Iron; Together With Tables Of Prices, Weights, And Other Information Useful To Engineers In Design And Estimating Wrought And Cast-Iron Work
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79
Patent Economical Switch and Signal Locking Gear
manufactured At The ViADUCT Works.
The use of locking gear in the working of switches and signals
at station yards and junctions having recently been rendered com-
pulsory by the regulations of the Board of Trade, it has become a
necessity to railway companies proposing to open new or alter existing
lines to procure apparatus fulfilling the conditions of safety and
efficiency required by the Board, and, at the same time, protect their
trains from accidents arising from forgetfulness or errors of judgment
on the part of the switch and signal men.
The object of the arrangement shown in the engraving is to pro-
vide a cheap and efficient method of locking in conjunction switches
and signals, crossing-gates and signals, or other machinery required
to be worked in connexion with signals. It is specially intended for
country districts of ordinary traffic, and does not attempt to rival the
costly and elaborate machinery suitable for crowded junctions. In
this arrangement the switch and signal levers work side by side in
cast-iron frames of a similar description to ordinary switch lever