The brain must get from Point A, where it receives a visual image, to Point B, where it signals arm muscles to act.
12.
In the 1920s, the British railway companies began to colour their distant signal arms yellow to better distinguish them from the red stop signals.
13.
Although yellow lights were trialled, neither they, nor yellow and black arms were adopted, meaning that distant signal arms are still painted red and white.
14.
The shape of the Trafficator arm is closely based upon the shape of the semaphore signal arm used by the Royal Bavarian Railway beginning in 1890.
15.
In semaphore areas, junctions are signalled using a series of between 2 and 5 stop signal arms on one bracket or gantry, known as "'splitting signals " '.
16.
Their spectacle cases, which are on the opposite side of the spindle on which the signal arm is pivoted, are therefore required to be sufficiently heavy to prevent this happening.
17.
The signalman there, Alfred Dando was barely literate and not physically strong enough to work his signal levers, so the signal arm was somewhere between " safe " and " caution ".
18.
During the early 1950s, states began to specify a mechanical "'stop signal arm "'which the driver would swing out from the left side of the bus to warn traffic of a stop in progress.
19.
:: " Down " for " clear " is unsafe because ice and snow can build up on the longer signal arm, overwhelming any action to raise it to the " stop " aspect.
20.
The CCF serves in teaching cadets the art of leadership, as well as an extensive variety of other skills and qualifications in first aid and radio using, of which the contingent has a signals arm.
