Dean,
Here is a link to the patent.
http://www.google.com/patents/about?...r+trigger+1962
Elmer patented a similar mechanism in 1939, this may be what you had. This rocker switch did not have a spring loaded detent like the 62 patent and generally had a round profile.
I'd have to see it to know for sure.
http://www.google.com/patents/about?...r+trigger+1939
Best, Dan