Appeal No. 1997-3624
Application 08/398,522
outer side, and thereby, a breakage of the battery
can be prevented.
The foregoing arrangement does not meet the limitations
in independent claim 1, or the corresponding limitations in
independent claims 16, 27 and 28, requiring the claimed safety
device to comprise a charge-discharge lead, a pressure-sensing
means and a cutting means which is an integral part of the
pressure-sensing means whereby the cutting means is pressed by
deformation of the pressure-sensing means to cut the charge-
discharge lead. In the Japanese battery, the cutting means
(blade-form rings 28 and cutting edges 28a) is not an integral
part of the pressure-sensing means (current breaker 24a) and
is not pressed by deformation of the pressure-sensing means to
cut the charge-discharge lead (also current breaker 24a).
The British reference discloses “a capacitor
incorporating a pressure-sensitive cut-out device which
responds to an increase of pressure within the capacitor
caused by overheating or by gas produced by electrical
breakdown” (page 1). The capacitor includes a casing 14
having an upper lid 16 and cover 21, a capacitor element 12
5
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