Insulator Post

Here is a cool insulator from my collection.  It is a power piece made back in the 1930's or 40's.  This color is called amber.  I like to call it "Beer Bottle Brown"  Below is an excerpt from some Hemingray literature that I found on the web. 

Hemingray D-510

For Primary Power Distribution Circuits 2300 Volts. Also for 4600 and 4000-volt Y circuits.

An insulator of high dielectric and mechanical strength. Ideal for primary distribution circuits. Extra heavy constructions -- rugged and everlasting. New in design and material. Carefully annealed by special Hemingray process.


Voltage Rating _ _ _ _ _ _ 6,600 Volts
Dry Flash-over _ _ _ _ _40,000 Volts
Wet Flash-over _ _ _ _ _22,000 Volts
Leakage Distance _ _ _ _ _ _ 4 3/8 in.
Wet Arcing Distance _ _ _ _ _ _ 1 in.
Diameter of Groove _ _ _ _ _ _ 7/8 in.
Weight per Piece _ _ _ _ _ _ _ 20 oz.
Quantity per Carton _ _ _ _ _ _ _ 50
Weight per Carton _ _ _ _ _ _ 68 lbs.
Weight per 100, packed _ _ _ 136 lbs.

The new Hemingray Glass possesses extra mechanical strength and high dielectric qualities. These insulators are unaffected by rapid temperature changes. They are thoroughly tested for heat shock.

-From: Hemingray Bulletin D-1 page 4