Dpris, you read it wrong.
The transfer bar came along first, then the warnings, then the safety conversion where you can send in your OM Ruger for the upgrade.
The first gun using the transfer bar was the Security-Six, introduced in 1971, patents date to 1970. Then the use of the transfer bar in the SA's came about in 1973, with the patent dates in 1972. (Reference "Ruger & His Guns, by Wilson & Dougans "Pistols & Revolvers, the Vintage years") The design concept came about as a result of some law changes in 1968 about drop tests, and this (Pages 126, 127, & 130 in Wilsons book,) for the SA's. And you can look in Dougans book, pages 331 & 332 about the patent dates for the transfer bar system. Nowhere in all that is a mentioning of a lost lawsuit being the reason. The 1968 GCA was a factor in designs as they were looking at what COULD happen if they got caught behind regulatory changes, by not having a product deemed safe by stupid laws.
But here is the part about lawsuits.
Pages 141 & 143 in Wilsons book. I quote; "In July 1976 the company was found liable for injuries sustained during the use of an "old model" Blackhawk in the case of Day vs Sturm, Ruger (Alaska), with an initial award of 2.3 million. The case was remanded for a new trial, but the ensuing publicity opened floodgates of litigation. Unfairly, the innovative Ruger New Model single-actions, using the patented transfer bar safety mechanism for the first time in any single-action revolver, were used by the plaintiffs attorneys to imply that the pre-1973 "old models" were "defective." This litigation peaked around 1979, and has decreased steadily ever since."
That is part of the information in Wilsons book.
You can get more on the lawsuit information from Wilsons book, OR the Stockholders annual report form 1978. (Page 154 in Wilsons book.) I can dig out a copy of the 1978 report but it's easier to check in Wilson's book.
So, the "internet rumors" of the transfer bar being developed because of lawsuits is wrong. The transfer bar did cause them to lose the case in 1976.
Personally, I'd like to find the SOB that filed the suit, AND his attorneys & do a Charlie Daniels on them. Take 'em out in swamp, tie 'em to a stump, let the alligators, rattlers & bugs have them. I've often wondered who was "Day" and where is the SOB now? To me, he was stupid in NOT learning how to safely carry a SA revolver that's design was known for over 100 years. Oh well!