Class 420/463 deals with "ALLOYS OR METALLIC COMPOSITIONS", and specifically with those with a palladium base. As such, the examiner who approved this patent, and thus claim 14 as well, would not have had experience with devices or methods for generating energy, as is recited in claim 14.
Had they maintained the restriction requirement, that claim would have been classified differently, and thus would likely have been examined by someone more familiar with the issues surrounding cold fusion.
So, the practical upshot is, claim 14 issued as is did because the applicants got lucky - they snuck it in with claims from a different class of invention, and got an examiner who wasn't familiar with cold fusion cases. This is a known weakness of the patent system, and one I've seen exploited before.