A possibility for their use is suggested by the small "globes" at the free ends of the conductors in the 2nd photo. If this array of conductors was intended for lightning protection, they better would have very sharp tips in order to reduce the flashover voltage appearing at the ends of the conductors. Also, ~vertical conductors would be better for lightning protection, as they would better protect the structure to which they are attached.
Instead those conductors might be co-driven radiators of a semi-wideband, ~directional antenna system.
Those are not antennas, but intended to be lightning dissipators. Basically, they are a type of lightning rod.
A lightning rod or lightning conductor (UK) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it will preferentially strike the rod and be conducted to ground through a wire, instead of passing through the structure, where it could start a fire or cause electrocution.
The following related questions and answers go into more detail:
The lightning dissipator consists of many small spikes and prevents a strike by slowly discharging through each little spike.
In summary, several answers support that they can prevent a lightning strike under some circumstances. Others disagree and vehemently declare that they are of no value whatsoever. I strongly believe that the truth lies somewhere in the middle.
On top of this corona-discharge negative ion generator is an effective (if fragile) ion emitter, which appearance and function is very similar to those photos in the question. There were actually eight of those .005" diameter stainless steel wires.
(No longer manufactured)