Tempered Windshield

billmetric · Posted: Wed Jun 26, 2024 8:41 pm Post subject: Re: Tempered Windshield

I would just like to say Hello to Jason Torchinsky from The Autopian, we had this figured out 15 years ago, maybe someone should send him a copy of "Progressive Refinements" I'm still doing research for my illustrated edition ...

https://www.theautopian.com/im-not-sure-how-ive-ne...-its-real/
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There is an idea of a Billmetric; some kind of abstraction. But there is no real me: only an entity, something illusory. And though I can hide my cold gaze, and you can shake my hand and feel flesh gripping yours and maybe you can even sense our lifestyles are probably comparable... I simply am not there...

finster · Posted: Wed Jun 19, 2024 3:01 am Post subject: Re: Tempered Windshield

just came across this topic mentioned in a farcebook group and thought what the heck? but it was a thing...and there was me thinking it was where the driver's head had punched a hole! Laughing

Image may have been reduced in size. Click image to view fullscreen.

and more recently

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spectre6000 · Posted: Sun Mar 30, 2014 5:15 pm Post subject:

Whuh? I totally didn't know this! I just took a Visurit windshield out of my '57 German Market Ghia that had this! It is a little worse for wear from 50 some odd years of light sand blasting, and I figured someone had tried to polish it out or something... I'm pretty sure the whole windshield is tempered though (it's certainly not laminated). Any more info?
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"Buy the best, cry once." -Gene Berg
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Bruce · Posted: Sun Sep 02, 2012 9:54 am Post subject:

It's dead flat and symmetrical. Of course there's only one window.
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RichOakley · Posted: Sat Sep 01, 2012 4:32 am Post subject:

Kjell Roar · Posted: Sat Sep 01, 2012 2:51 am Post subject:

bally · Posted: Sat Sep 01, 2012 2:25 am Post subject:

Most interesting - I'd noticed it on my spare screen as I put it in the loft and assumed it was a fault or stress marks - it's nice to know it's og and nothing wrong with it.

Dave

RichOakley · Posted: Fri Aug 31, 2012 2:03 pm Post subject:

My RHD Cabrio original windscreen...

johnshenry · Posted: Thu Feb 19, 2009 6:09 am Post subject:

Was a popular option in the CA bay area. I see lots of rainbows on glass out there............. Wink

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'57 Deluxe
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Bruce · Posted: Thu Feb 19, 2009 12:54 am Post subject:

I checked the original SEKURIT front window from a 51 split with polarized sunglasses, and there's no clear area in front of the driver as described. It appears the whole window is uniformly tempered.
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billmetric · Posted: Wed Feb 18, 2009 4:57 pm Post subject:

the windshield in the photo was almost 50 years old when it broke and it was virtually scratch free, I didnt notice any differance in durability between the vison area and the rest of the glass,
the "rainbow effect" where you can see the tempering patern with polarized sunglasses was visable everywhere except in the center of the vision area, at the transition point there was an actual circular rainbow where you could see several color changes in rings around the circular area, I'm not sure what method of tempering was employed at the time but I dont think any part of a single pane of tempered glass could be called plate glass in itself, I would suspect that if a large enough rock hit the vision area without breaking, it would probably cave in the whole windshield as the rest of the glass crystalized around it, I would be interested in seeing that photo from the 1956 book, I remember seeing some promotional type photos from the day, that sounds similar,
as far as markings on the glass mine was extremely faint almost invisable, I'm sure I would have saved the logo area at the time it broke if I could have seen it, I'm thinking it was probably Duro-Glas or Sekurit but I really dont remember, I have a few old photos I took while driving before it broke, I will look thru them and see if I can make it out in any of them or at least jog my memory, I do remember that it was in the lower left corner FAINT, barely visable at all...
_________________
There is an idea of a Billmetric; some kind of abstraction. But there is no real me: only an entity, something illusory. And though I can hide my cold gaze, and you can shake my hand and feel flesh gripping yours and maybe you can even sense our lifestyles are probably comparable... I simply am not there...

johan_l · Samba Member Joined: March 14, 2004 Posts: 533

I read in an old book (1956) that it also would work the other way around - if a rock hit the area in front of the driver, that area should break while the rest of the windscreen would remain clear... Book has a picture showing a guy looking out of the clear area in front of him... Smile

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Johan, Sweden
1960 Karmann-Ghia coupé
1957 Oval window
Bastard Split window <-- Translate

jody714 · Posted: Wed Feb 18, 2009 11:22 am Post subject:

Was (is) that area less susceptible to scratches than the rest of the windshield ?? The front glass in my Mar'55 has no markings at all, do you think it has been replaced ?? All the rest of the windows are large SEKURIT.

Jody
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VWwerks · Posted: Wed Feb 18, 2009 10:43 am Post subject: Re: Tempered Windshield

53 0val · Posted: Wed Feb 18, 2009 10:04 am Post subject:

Very interesting topic...................

I did not know about the euro-spec windshield having the vision area....
Is the "rainbow effect" not visable in that part of the window?
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billmetric · Posted: Wed Feb 18, 2009 8:52 am Post subject:

Prior to 13 October 1954 on Euro spec cars the windshields were tempered uniformly overall causing complete loss of vision if a rock were to shatter the glass, due to the nature of tempered glass any rock which was big enough to crack the glass would cause the entire windshield to shatter into small pieces, a lot of the energy of the rock would be absorbed by the forceful shattering of the glass allowing the glass to remain in place but blocking any vision thru it
_________________
There is an idea of a Billmetric; some kind of abstraction. But there is no real me: only an entity, something illusory. And though I can hide my cold gaze, and you can shake my hand and feel flesh gripping yours and maybe you can even sense our lifestyles are probably comparable... I simply am not there...

Bruce · Posted: Tue Feb 17, 2009 10:23 pm Post subject: Re: Tempered Windshield

STOICH · Posted: Tue Feb 17, 2009 7:50 am Post subject:

I hit an aftermarket windshield with my head once..... knocked the whole thing out, landed between the hood handle and the bumper.....

john7 · Posted: Mon Feb 16, 2009 11:32 pm Post subject:


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