Research Division

Reprinted from "INSULATORS - Crown Jewels of the Wire", October 1982, page 29

Dear Dora, 

Thanks for the sample issue of "C.J." I'm going to wait a bit before I subscribe, as we are moving next month, and I do not know where our new address will be.

However, the reason I'm writing is for a little information. This past weekend I've picked up an item that I've never seen before or ever read about in any of the literature. I'll draw a rough sketch and explain:

It appears to be blown in a mold, and it is hollow just like a bottle. The opening is very jagged, as if it was broken off from the mold here. The curved portions (marked 'P') appear to be external threads (no 'P' on the glass -- I'm just using that to point them out!). 

What's really interesting here is that it was patented by MRS G. E. HALLER. With all due respect, I've never seen a woman given credit for a patent during this time period! I think that's quite unusual.

The dealer that I bought it from said it was some sort of insulator and that it screwed into wood with the threads on the bottom. I have no idea if its application was for telephone or telegraph, or possibly a lightning rod or house wiring insulator.

It stands 2-1/2" high and is 2-1/4" in diameter; aqua bottle glass with lots of bubbles -- and you couldn't buy a decent sandwich for what I paid for it! Any information you or your readers might have would be greatly appreciated. 
Charles King 
11 North Crest Dr. 
Clifton Park, NY 12065