Help! Found these and have nonidea what they are

[Tandrews]

Hello, I found these in a box with a bunch of clear insulators. Not sure what they are. They seem to be made from ceramic or something other than glass. There are no markings on the solid colored one.

 

[CanadianBottles]

The Thoma insulator is porcelain, I think the other one is rubber. I'm not an insulator expert so can't tell you anything other than that unfortunately.

 

[nydigger]

First one looks rubber or composite. Others are porcelain. They are all insulators

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[BillinMo]

The first one is usually called Bakelite, a type of fibrous plastic material. Usually they went on lines where glass could get damaged easily.

The second is porcelain (the preferred term over ceramic). The marking isn't complete, it's from the THOMAS company in Ohio, probably 1930s-early 1960s. That's a neat uneven glaze.

 

[Tandrews]

The first one is usually called Bakelite, a type of fibrous plastic material. Usually they went on lines where glass could get damaged easily.

The second is porcelain (the preferred term over ceramic). The marking isn't complete, it's from the THOMAS company in Ohio, probably 1930s-early 1960s. That's a neat uneven glaze.

Thank you so much.