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
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
81
therefore the special signal box usually employed at junctions may be
dispensed with. An advantage, on account of simplicity, is found in
fixing, as any ordinary platelayer or carpenter is quite capable of
fixing it, the cost of the arrangement being only slightly in excess of
the ordinary levers and frames, to cover the cost of the few additional
parts required. These extra parts required, beyond those of an ordi-
nary lever frame, being a tail piece to each lever, and one locking
bar to the set of three levers.
In stations where it is not found convenient to work the signal
and switches from the same spot, the locking levers may be fixed at
the switches, and wires carried from them to where it is required to
work the signals. This saves the outlay for long switch rods, and is
effective up to a distance of 600 yards.
The price of a set of three-lever locking gear is £10.
Cranes.
A crane, as above, to lift 2 tons, price about £40.
Ditto ditto 3 ditto £75.
Ditto ditto 5 ditto £110.
F
============================