hi brian, your mag lock is in the locked position. you need a strong magnet to pull down the ferrous sprung pin. you may be able to slide a feeler gauge in to push it down.
Hi, Sorry to bother you. My Protector Lamp is in two parts (See photograph). How do I get the short brass arm (See close-up) to one side so the two parts screw together? Thanking you in anticipation. Richard Hobson