Is there any purpose to the way these aftermarket lens were made with the two half circles at the top? Was it somehow supposed to redirect the light better, or is it just another case of snake-oil? These were made by the Globe Specialty Co. of Chicago IL.
Guess I'm getting tired, purpose, thought you were asking how to get purple lenses. sorry
Did Ford have a design patent on the "H" type lens to where other
suppliers could not directly copy it ?
I'm fairly certain the Ford "H" lenses were originally Hudson Glass Company (not car company) designed lenses. Ford may have purchased the rights to the Hudson design, although Hudson lenses are out there, I have a pair on Barney (25 roadster--or P/U, haven't decided yet@).
Agree with your determination, Ford Service Bulletin says "...after much research and experiment have developed and brought out the "H" Headlight Lens..."
But IMO, that research was checking out the many glass lens companies making fluted lens to meet the expanding laws in the many states that required anti-glare for headlamps. So Ford decided on Hudson Co offering. Have found adv. for the Hudson lens that pre-dates the announcement in the Service Bulletin!
Hudson was a well established company with resources to fulfill all Ford needs on a lens too.
John, is there a brand on your after-market lenses ? I'd guess the arcs at top were to avoid patent infringement. I doubt they affect the way the beam is focussed.
So does the H really stand for Hudson?
Rich, no specialty name, just the manufacturer. I think you are right about them having no special function, other than to just look different.
I think they are Sport Lenses, in keeping with this nuevo -blabber
that you can buy a Sport Sedan. Put those on your car and you
are now one "sporty" individual !