Permite and Aluminum Industries, Inc.
Permite was a trademark of Aluminum Industries, Inc. for their aluminum/copper casting alloys. They also used it for aluminum paint.
There were lots of Permite alloys, but according to "Woldman's Engineering Alloys, 9th edition, edited by John P. Frick", plain Permite (no alloy number) is
Cu 10, Fe 1, Mg 0.4, Si 0.5, Al balance
Tensile strength 40 ksi, Yield strength 38 ksi
Elongation 0.5, Hardness 120 HB
TCE 0.0000127
It would kind of odd if this is the actual alloy used for the guard...the handbook says it's designed for internal combustion engine pistons.
The guard looks cast which would be consistent with the Permite name. Perhaps "E192" is the pattern number or the mold number. Permite appears to be derived from "permanent mold casting", an early name from what is now commonly called die casting.
Aluminum Industries also did sand casting, as is shown in these photographs by Alfred Palmer from 1942. http://photogrammar.yale.edu/records/index.php?record=oem2002001813/PP
According to "Cincinnati: A Guide to the Queen City and Its Neighbors" a WPA Writers Project book published in 1943, pages 438-440
There were lots of Permite alloys, but according to "Woldman's Engineering Alloys, 9th edition, edited by John P. Frick", plain Permite (no alloy number) is
Cu 10, Fe 1, Mg 0.4, Si 0.5, Al balance
Tensile strength 40 ksi, Yield strength 38 ksi
Elongation 0.5, Hardness 120 HB
TCE 0.0000127
It would kind of odd if this is the actual alloy used for the guard...the handbook says it's designed for internal combustion engine pistons.
The guard looks cast which would be consistent with the Permite name. Perhaps "E192" is the pattern number or the mold number. Permite appears to be derived from "permanent mold casting", an early name from what is now commonly called die casting.
Aluminum Industries also did sand casting, as is shown in these photographs by Alfred Palmer from 1942. http://photogrammar.yale.edu/records/index.php?record=oem2002001813/PP
According to "Cincinnati: A Guide to the Queen City and Its Neighbors" a WPA Writers Project book published in 1943, pages 438-440
"Continue straight ahead onto Beekman St. from Cummins St.
<map of the area on p439>
ALUMINUM INDUSTRIES INC. occupies a group of brick and concrete buildings of varying heights, housing the offices, warehouse, and shipping and purchasing departments and a portion of the manufacturing facilities of one of the Nation's largest producers of aluminum products for the aircraft and automotive industries. The trade name PERMITE identifies the products of this company.
The concern has a number of plants; the newest and most interesting is the large aluminum and magnesium alloy foundry and paint plant situated on a 35-acre tract west of Bridgetown Road. This foundry has an estimated capacity of 2.255,000 pounds per month. and the paint plant produces aluminum paints suitable for every surface painting condition, as well as special paints for war production uses.
Aluminum Industries Inc. had its origin as the Kant-Skore Piston Company of Buffalo, New York. It moved to Cincinnati in 1920, and was reorganized under its present name in 1926. Later it absorbed the Diamond Motor Parts Company of St. Cloud. Minnesota, and the Dall Manufacturing Company of Cleveland, Ohio. In 1942 there were about 1.300 employees on the payroll."
The full contents of this book can be found at http://catalog.hathitrust.org/Record/001264815
Note that the only active US trademark for Permite today is for a dental alloys company in Australia. No idea if they are in anyway related to the old Aluminum Industries.
I dug up a few old ads using the Permite trademark.
Ad #1 from Automobile Digest, Feb 1933, page 28
Ad#2 from Automobile Digest, Mar 1933, page 36
Ad #3 from Popular Mechanics, Oct 1955, page 307
There is an active Permite Paints company in Stone Mountain, GA. It appears to be connected to the old Aluminum Industries. Perhaps it is the successor company to the Permite Paint Division.
http://www.permitepaints.com/History
Ad #1 from Automobile Digest, Feb 1933, page 28
Ad#2 from Automobile Digest, Mar 1933, page 36
Ad #3 from Popular Mechanics, Oct 1955, page 307
There is an active Permite Paints company in Stone Mountain, GA. It appears to be connected to the old Aluminum Industries. Perhaps it is the successor company to the Permite Paint Division.
http://www.permitepaints.com/History