|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-04-2013, 07:58 PM | #1 |
Member
Join Date: Sep 2013
Location: oklahoma
Posts: 38
|
double paned glass in a 40
I'm disassembling a 40 sedan and all of the glass (windshield and side windows) are double paned. Not safety glass but two panes of glass....kind of like a storm window. Is this normal? All needs replaced but I thought it would be safety glass. Any thoughts?
|
10-04-2013, 08:13 PM | #2 |
Senior Member
Join Date: May 2010
Location: Southern California
Posts: 7,030
|
Re: double paned glass in a 40
There are two types of safety glass. Today we use tempered glass everywhere in a car but the windshield. This glass is made by heat treating the class after it is cut. The glass is brought almost to a molten temperature. It is then hit with a blast of cold air to solidify the surface. As the interior cools it contracts. This sets up stress within the pane of glass. This stress causes the glass to break into thousands of harmless pieces when it is broken. In case of an auto accident the glass in the side windows can be broken with a sharp rap to reach passengers trapped inside. It is also probably cheaper to manufacture than the laminated. This glass in the windshield is laminated. There are two pieces of glass sandwiched around a plastic (acetate) core that keeps the glass from breaking into dangerous pieces. The tempered glass is not used in the windshield because you wouldn't want a windshield to shatter into a thousand pieces if hit by a rock on the freeway.The glass in the '40 was the same type that is used in windshields today.
Charlie Stephens Last edited by Charlie Stephens; 10-05-2013 at 03:33 AM. |
Sponsored Links (Register now to hide all advertisements) |
|
10-04-2013, 09:06 PM | #3 |
Senior Member
Join Date: May 2010
Location: Sydney, Australia
Posts: 949
|
Re: double paned glass in a 40
The old safety glass was made with a clear Acetate sheet sandwiched between two layers of glass. With time the Acetate yellows around the edges. This was a big improvement over the Plate Glass used in the early 30's.
|
10-04-2013, 11:15 PM | #4 |
Member
Join Date: Aug 2011
Location: Antioch, IL
Posts: 33
|
Re: double paned glass in a 40
Bart-you're going to have to take some pictures as everyone's response above reverences the commonly known safety glass construction.. If yours is truly like a "storm window"--it'd be interesting to see..
|
10-05-2013, 07:27 AM | #5 |
Member
Join Date: Sep 2013
Location: oklahoma
Posts: 38
|
Re: double paned glass in a 40
Not much of it is left. All of the glass has come out in pieces. and I was unable to tell if the two panes were sealed at the edges but there appeared to be a 16th of an inch or so gap between the panes. I''' try to get some pics.
|
10-05-2013, 07:41 AM | #6 |
Senior Member
Join Date: May 2010
Posts: 1,835
|
Re: double paned glass in a 40
Sponsored Links (Register now to hide all advertisements)
__________________
"Never complain,never explain"... Henry Ford II |
10-05-2013, 08:45 AM | #7 |
BANNED
Join Date: Jan 2011
Location: Harlan, ia
Posts: 68
|
Re: double paned glass in a 40
I just removed the rear window out of my 1939 ford coupe and it came out in 2 layers with nothing in between, but I am sure the layer of plastic was completely deteriated.
__________________
1939 Ford 5-window Deluxe Coupe |
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|