Appeal No. 2001-2019
Application No. 08/996,567 Page 14
Figure 1 discloses a succession of emergency phone stations
spaced at intervals along the highway between manned highway
police posts (central stations) (col. 5, lines 41-45). As shown
in figure 2, each emergency phone station is provided with a
flashing lamp signaling subsystem comprised of four flash lamps,
provided on an L-shaped bracket (col. 6, lines 62-68). Markl
further discloses (col. 8, lines 24-32) that “[d]epending upon
the nature of the hazard involved it may be appropriate to
activate a series of stations at one side of the highway only,
e.g., in the case of a traffic accident or a traffic jam, or it
may be appropriate to activate a series of stations at both sides
of the highway, e.g., in the case of a localized stretch of fog,
a localized region of road-icing, etc.” Flash lamp control
system is shown in figure 4. When firing voltage Uz is applied
to ignition transformer U5.1, glow lamp GL1 is fired. Flash
voltage Ub, applied across the two main electrodes of flash lamp
BR1, effects firing of the latter. The firing method of figure 4
is externally triggered firing. This is in contrast to the usual
method in which the moment of ignition is determined exclusively
by the instantaneous state of charge in each flash lamp's storage
condenser. The triggering of the flash lamps can be triggered
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