C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
204/119, 204/88
C23F 13/04 (2006.01) C23F 13/20 (2006.01) C23F 13/22 (2006.01)
Patent
CA 2030970
A cathodic protection system for a metallic structure buried in the earth, the system comprising an impressed anode assembly buried in the earth in proximity with said metallic structure; a sacrificial anode assembly buried in the earth in proximity with said metallic structure; a solar power source for providing an output voltage that increases with increasing intensity of sunlight incident thereon and that decreases with decreasing intensity of the sunlight incident thereon; first connecting means, powered solely by said solar power source, operative for selectively connecting and disconnecting said sacrificial anode assembly with said metallic structure; second connecting means, powered solely by said solar power source, operative for selectively connecting and disconnecting said solar power source between said impressed anode assembly and said metallic structure; and sensing means, coupled to said solar power source and to said first and second connecting means, for sensing the output voltage of said solar power source, said sensing means being operative, upon sensing that the output voltage of said solar power source has fallen below a predetermined level, for causing said first connecting means to connect said metallic structure to said sacrificial anode assembly and for causing said second connecting means to disconnect said solar power source from said metallic structure and said impressed anode assembly, said sensing means being further operative, upon sensing that the output voltage of said solar power source has risen above said predetermined level, for causing said first connecting means to disconnect said metallic structure from said sacrificial anode assembly and for causing said second connecting means to connect said solar power source to said metallic structure and said impressed anode assembly.
Carpenter Ronald L.
Morris Robert G.
Yates Craig E.
Colorado Solar-Tech Inc.
Marks & Clerk
LandOfFree
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