cdafd,
We didn't have nearly the changes back then as we do today. The oldest copy I have is 1980 but I seem to remember the "little red pamphlet" had about 180 pages.
Question for everyone.
Do you remember the word "phantom" in NFPA #13?
Yes, did exist about 30 years ago and what it referred to was calculations.
You have a building with a density of .19/1500 for OH2 (yes, it was .19) and the heads were placed 10'x10' for 100 sq ft per head but along the wall the line started 2'-0" off the wall then 10'-0" between lines. How many heads did you have to calculate?
Today it would be the 5 heads along the wall at 80 sq ft for a total of 400 sq ft. Today you would have to add an additional 11 heads @ 100 sq ft each to total your 1,500 sq ft.
But back in the day the "missing" 3' along that wall was called a phantom area and we simply did our 15 sprinklers.
If you remember the phantom area rules you're older than dirt.
Hydraulic calcs on a dry grid.
And government didn't want your stinking sprinkler drawings everything went to ISO, FM or IRI for review and approval. Once you had that you were good to go.
Backflow assemblies did not exist.
So what is your oldest original sprinkler drawing?
Mine is a site plan of the Pell City Mfg Company in Pell City, Alabama dated March 31, 1905. On the site plan it specifically mentions "Grinnell Glass Button Sprinklers" whatever those were but I have the drawing framed and in my office. Sort of reminds me of the good old days.