American Injector co.wind deflector whats it for ?

I have a what is it to question. My buddy gave me these wind deflectors. For the the life of me I can not find any info on them. Just for oil can stuff. I thought they were for a big roadster, or a truck of sorts. Thanks

Stamped in the frame is American Injector Co. Detroit USA Patented 6-1-32

 

I believe it's an early aftermarket vent or wing window for any vehicle it would fit on.

 

Looks like a universal Wind Wing that attaches to the door edge. It would only work on a closed car,or Cabrolet.

 

I see how they clamped to the door edge, but they are so big. Made me think some how it was for a windshield extension. Thanks. The cabrolet makes sense, I remember an old packard with similar wings on it at Medowbrook one year.

 

Hard to guage size by the pictures..when you say Big..how big?

maybe they are for a truck? or a Big truck like Mack, or REO

 

maybe for a big double windshield pheaton thing.