Help me identify these: glass insulators?

[madstat]

The painters removed these off of the house. I'd like to know as much about them as I can.

The glass is solid 1 1/4" Dia X 5 3/8", made in USA by PYREX Patent number 170006 - info which is all formed in the glass. The attaching base is solid brass (1 3/4" x 3" x 5/8 H). The cap is 1"H with a 1/2'deep screw hole, and appears to be solid brass (scratched it) with some kind of black powder coating.

Seems to me a bit larger than the old electric insulators around the house. Neighbor tells me the guy who had the house before 'might' have operated a ham radio but wasn't sure. Any thoughts on what they were used for?

 

[edsauto]

Looks like it is called a standoff insulator for antenas, http://www.nia.org/general/g_stand.htm

Dan.....

 

[tavernaut]

US patent 170006 is for a curtain roller (retractor). Looks like you're missing the end w/ the little spring motor, like a window shade uses.

 

[Kevin C]

http://www.nia.org/history_and_guide/chapters/Vol_1-17_Corning_Glass_Works.pdf

Interesting read Pyrex... My guess is your missing one digit on your number.

 

[Kevin C]

Found it.... Patent # 1700066 Jan. 22, 1929. 1,700,066

A; E. MARSHALL INSULATOR FOR RADIO FREQUENCY CURRENTS Filed July 17, 1924 w w di Patented Jan. 22, 1929.

https://www.google.com/patents/US1700066?dq=corning+patents+insulator&hl=en&sa=X&ei=Sie4U4nCKM6hogTz7oGYAw&ved=0CEwQ6AEwBzgK

Having thus described my invention what I claim is c 1. In a system carrying radio frequency currents, the combination with a part charged with such currents, of an insulator 7 charged with such currents, of an insulator therefor composed of a homogeneous mixture therefor composed of a glass having a high having a high silica content, and containing 10 silica content, a low alkali content and conboric oxide and a small amount of potash.

http://www.worthpoint.com/worthopedia/large-pyrex-brass-insulator-radio-251764748

http://www.worthpoint.com/worthopedia/antique-pyrex-radio-insulator-96135959

 

[PelicanPines]

I love glass insulators. Those look cool. I live near the Weird NJ house of insulators.

 

[madstat]

Thanks for helping folks. Especially with the missing number on the patent.

I also eventually found some info

http://glassian.org/Pyrex/Radio2/page16.html


that glassian.org site is pretty cool.

 

[Alan Douglas]

They may have come from a broadcast transmitter or antenna tower, then were used by a ham for an antenna or feedline.