Where was the Hockey Mask and Chain saw bit started?

I know this is a stupid question, but where did it start with the chain saw, and hockey mask it's in friday the 13th, bloody murder, freddy vs. jason...etc. but where does it all go back too?Where was the Hockey Mask and Chain saw bit started?
The hockey mask in the Friday the 13th movies begins in either part 3 or 4. Jason finds the mask during his bloody rampage and I assume he likes the look. Before then Jason wore a bag over his head.





The chainsaw comes from the Texas Chainsaw Massacre.Where was the Hockey Mask and Chain saw bit started?
In the mind of some psychotic Hollywood writer.





I will use the movie ';My Bloody Valentine'; as an example. Do you think that the pick ax and gas mask goes back to anything other that some figment of a writer's vivid imagination?
Jason Voorhies was the first movie villain to wear a hockey mask.
Jason friday the 13th.
It goes back to Jason.