View Full Version : Proper Term For Spirit Level Protective Glass Disks
John Baum
12-01-2023, 3:59 PM
Please educate me as to the proper name for the protective glass disks on a classic spirit level. Those who went before me never taught me during my 83 years this information and Dr. Google can’t seem to understand what I want.
I have a very solid 24-inch long classic cast aluminum spirit level made by Mays Bros. Manuf. Co. of Port Austin, Mich. It is missing two of its 1-7/8 inch diameter glass protective disks that appear to have been set using plumber’s putty made from linseed oil and plaster-of-Paris or perhaps plaster alone mixed thick enough to hold its shape.
I will try to add an image. It suggests that the level was made around 1927, so it is almost an antique.
Please educate me as to the part I want so I can try to purchase one.
511409
Thanks
John
George Yetka
12-01-2023, 4:43 PM
Call Mayes Bros in Tenn @ 423-926-6171.
Supposedly they have parts for old stock
Edward Weber
12-01-2023, 5:01 PM
I looked up what I thought was the proper name, I got the same results as you.
Google "watch glass" and or "beaker cover"
They come in many sizes
Hope this helps.
James Pallas
12-01-2023, 7:17 PM
I believe the term you are looking for is vial cover.
Jim
Bill Dufour
12-01-2023, 9:58 PM
On a dial indicator or watch "crystal". Sight glass may work as well.
Bill D.
Bill Dufour
12-01-2023, 10:02 PM
You can cut sheet glass with tin snips. Mark a line with a sharpie and then do it underwater.
Bill D
John Baum
12-01-2023, 10:19 PM
In every instance I wrote below Mays and not Mayes. I apologize. I could not find a way to edit the post I created.
John
My thanks, also to George Yetka for pointing out the successor company in Tennessee. I used the phone number to discover that the website can be accessed here:
https://www.greatnecksaw.com/
Under "measuring" the second entry, "levels" will take you here to see the current offerings.
https://www.greatnecksaw.com/247-measuring-tools/levels
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Please educate me as to the proper name for the protective glass disks on a classic spirit level. Those who went before me never taught me during my 83 years this information and Dr. Google can’t seem to understand what I want.
I have a very solid 24-inch long classic cast aluminum spirit level made by Mays Bros. Manuf. Co. of Port Austin, Mich. It is missing two of its 1-7/8 inch diameter glass protective disks that appear to have been set using plumber’s putty made from linseed oil and plaster-of-Paris or perhaps plaster alone mixed thick enough to hold its shape.
I will try to add an image. It suggests that the level was made around 1927, so it is almost an antique.
Please educate me as to the part I want so I can try to purchase one.
511409
Thanks
John
Bob Wingard
12-02-2023, 4:00 PM
This is a sale for 6 lenses, but they are cheap ...
https://www.ebay.com/itm/353868734252?var=0&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338590836&toolid=10044&customid=d12f4d6ea3ae1df761d2280539a2c2d5
Tom M King
12-02-2023, 6:43 PM
I have a number of different brands of levels missing those glasses. Some are over 40 years old but still read an accurate level or plumb.
Lee Schierer
12-02-2023, 7:00 PM
YOu can purchase glass discs from McMaster-Carr (https://www.mcmaster.com/products/glass-discs/borosilicate-glass-rods-and-discs/?s=glass-discs) i 1-3/4" dia x 1/8" thick.
This person will custom cut glass discs (https://www.ebay.com/itm/264114946991) Scroll down the page to see the thickness and ordering information
Dwayne Watt
12-03-2023, 9:41 AM
I will try to add an image. It suggests that the level was made around 1927, so it is almost an antique.
This made me laugh out loud. I hate to be bearer of bad news but your level is an antique.
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