Appeal No. 95-4678
Application 08/097,572
housing disclosed by Duncan as proposed by the examiner. At
best, Shine would have suggested replacing Duncan’s emergency
lighting system, which is enclosed within the sign housing,
with a self-contained emergency power supply or module mounted
on the exterior of the housing.
Be this as it may, the combined teachings of Duncan and
Shine nonetheless establish a prima facie case of obviousness
with respect to the subject matter recited in claim 1, and in
claim 9 which depends from claim 1. In this regard, Duncan’s
secondary or emergency lighting system meets all of the
limitations in claim 1 relating to the emergency illumination
means. More specifically, Duncan’s emergency system is mounted
within its exit sign housing enclosure and is operationally
connected to the primary illumination system to detect failure
thereof and thereafter provide auxiliary illumination. Duncan’s
angle section strip 3 (see Figure 1), lamps 13, battery 6 and
secondary lighting system power circuit (see Figure 2)
respectively constitute an emergency power pack housing defining
an emergency power pack housing enclosure, at least one low
voltage emergency lamp mounted on the emergency power pack
housing, an emergency electric power supply located within the
emergency power pack housing enclosure and an emergency electric
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