A. (1) Would adjust back of reflector so front edge of reflector would
be parallel with front edge of case. (2) Adjust lamp to have point of
copper electrode as near the center of reflector as possible with
carbons as near the center of chimney hole as you can set them. (3) Have
the locomotive on straight track. Now move the base of the lamp around
until you get a parallel beam of white light straight down the center of
the track, then tighten lamp down.
36. Q. If the light throws shadows upon the track, is it properly
focused?
A. No.
37. Q. If the light is properly focused, that is, if the rays are
leaving the reflector in parallel lines, but the light does not strike
the center of the track, what should be done?
A. When the light rays are thrown out in parallel lines and they do not
strike the center of the track, it denotes that the headlight case is
not set straight with the engine, and the entire case on baseboard must
be shifted until the shaft of light strikes the track as desired.
38. Q. What can you do to insure a good and unfailing light for the
entire trip?
A. By carefully inspecting the entire equipment before departing on each
trip and know that there are no wires with insulation chafed or worn
off; that all screws and connections are tight; commutator clean;
brushes set in brush holder in the proper manner; carbon in lamp of
sufficient length to complete trip; copper electrode cleaned off and oil
in both bearings.