I know you guys think I have weird links and jumps but my follow on to this because of the Convair electical bus drop out was following news about Constant Speed Drives and thus https://www.company-histories.com/Sundstrand-Corporation-Company-History.html# If you read this you will eventually find "Harry Stonecipher" and "McDonnell-Douglas." OK I am reluctant to go to Northwest Flight 255 which is a forensic analysis presented by "Jack McDonnell", someone I met in the mid-1970's related to Engineering owning it's own Digital VAX. https://libraryonline.erau.edu/online-full-text/ntsb/aircraft-accident-reports/AAR88-05.pdf Here the link is to TI KLIXON circuit breaker.