I will try to shed some light on the question here which I think is what was the pattern during the period from around 1952 to 1957.
First, the pattern used in 1952 is taken from the 1952 rulebook I am not sure what it was prior to that time. That is the pattern that we use for OTS and the 1952 rulebook is available from various sources including Tim McTigues's website at
http://home.cogeco.ca/~ukeyman/otsmain.shtmlI have a poor copy of pages taken from an Air Trails issue from 1953 (month uncertain) that shows the "Official AMA Modelplane Rules". This has a copyright in 1953 so I can only assume that these were the rules in affect in 1953 and for some time later. Only the maneuvers for the CLPA event were listed with descriptions and diagrams.
(Numbers in parentheses are the maximum and minimum scores for each maneuver)
Take-off (5, 0)
Normal Level Flight (5, 1)
Climb (10, 2)
Dive (10, 2)
Wingover (10, 2)
Reverse Wingover (20, 2)
Consecutive Inside Loops -3 loops recovering to inerted flight (20, 4)
Normal Inverted Flight (20, 4)
Consecutive Outside Loops - 3 loops (20,4)
Square Cornered Loop - 1 loop (20, 4)
Horizontal Eights -2 with vertical climb in the intersections (40,
Vertical Eights 2 and a bit confusing as to where the start and end of the meneuver and if a complete inside loop is flown first (40, 12)
Overhead Eights - 2 to be flown much as in the current rules (40,
Square Cornered Horizontal Eight - 1 with vertical climb in the intersections (40,
Landing (10, 0)
There was an articale in the Jul 53 issue of Model Airplane News titled "The New Stunt Rules".
A sample score sheet is shown with apperarance points for Realism, Finish and Workmanship for a total of 84 points compared to the maximum flight score (with 25 pattern points) of 340. The article mentions that "Tabulation of voting on the rules change ballot showed 78 percent favored retaining appearance points as part of the precision acrobatic score."
I have a copy of another article from Air Trails (or Air Trails Hobbies for Youn Men) that does not show a date. The introductory paragraph states "Exciting news for control line modelers are the AMA's 1957-58 stunt regulations. ... All maneuver are scored on a basis of miximum 40 points, minimum 10 points unless otherwise listed. ..." This goes on to show the maneuvers and descriptions of the current pattern that we have now.
What I do not have is anything to show if there was any different pattern between 1953 and 1957.
There was a 2-page spread in the April 54 issue of Air Trails Hobbies for Young Men that showed a number of manuevers that were considered for the New Your Mirror Model Flying Fair. These suggestions were submitted to the Mirror Meet organizers by Hi Johnson, Don Still, Lloyd Curtis, Jim Saftic and George Aldrich. Some of these were incorporated into the Mirror Meet (which the Tulsa Glue Dobbers have resurrected) plus some othere that were considered a "wee bit too complicated for competition flying - just yet."
The legend is that George Aldrich created the pattern as defined in that 1957 rulebook. The triangles, the hourglass, the outside square loops and a form of the four leaf clover appear in this 1954 article.