Corning Lens

About 8 1/4”. Any idea what for?

 

Car headlight

 

Not sure it's a lens... Corning makes a lot of lab equipment like beakers and such. The patent number (I can't read) would probably give all info you need.

@i need help and @Jivvy ?

 

83/8D X_ _1/2F

 

Could be a signal glass lens for a railroad lantern/light. Lenses can have a focal length indicated with an F. Yours could be 2F.

What is the diameter?

Just a guess and possible source for search criteria...

 

Is it just plane glass or does it magnify? At first I thought it might be a refractor lens for a refracting telescope, but not with the markings on the edge.
Most likely an automotive or RR lens for a light.

 

Diameter about 8 1/4. Kind of magnify a bit.

 

This is for Adams & Westlake, but it has some general info on signal glass for RR applications. Corning is mentioned in a few places, but you cannot search the text...it's a bitmap image of a document.

http://www.railroadiana.org/library/cat_AW_40s/aw_signal_glass.pdf

 

@sabre123

It's a pdf. file ,if you read it in a pdf. reader I can magnify it 600% and it is very readable.

 

@Hollyblue

I meant, as in using Ctrl-F and typing "corning" in the search entry box to search for a text string.

As opposed to text displayed on a web page...where you can search

 

My initial reaction as well. (Mr. Jivvy hobby a few years back.)

After that, I've got nothing.

 

Telescope lenses are usually bi-convex,we don't know what type of surfaces this one has.

 

Oh, I didn't hang on to the telescope idea. As @Phil F. said, "not with the markings on the edge."