Glendale Water and Power, the utility in the city of Glendale, CA, uses lots of tapered ellipticals like this. This one looks aluminum to me, but I saw some more curved ones that are rusty so i am not sure.
This one is more than likely "brushed aluminum". Narragansett Electric used these before NGrid took over in the mid-to-late 90's. National Grid has installed a few tapered E arms before, but they've been the 6ft kind.
Curlee style note the 3 screw mount? and how the screws mounts on the sides in the bottom
HAPCO uses 2 bolts on the bracket area, but I really can't find a good clear picture of it but look at page 102 on this link
Shakespeare arms are similar to above but the bracket has some grooves like my shakespeare arm seen here Here are the design from their page and we have those arms on the fiberglass poles all over my area under BGE!!! See them right here!
There are other brands too....but some seem to be hard to find online or some places.....I need to ask about my other arm, it may be Maclean...not sure...will need to ask...
HAPCO uses 2 bolts on the bracket area, but I really can't find a good clear picture of it but look at page 102 on this link
Shakespeare arms are similar to above but the bracket has some grooves like my shakespeare arm seen here Here are the design from their page and we have those arms on the fiberglass poles all over my area under BGE!!! See them right here!
Utility Metals arm and bracket their tapered arm seem more rounded than the Shakespeare style....
There are other brands too....but some seem to be hard to find online or some places.....I need to ask about my other arm, it may be Maclean...not sure...will need to ask...