Was there ever a rule that required a player who has just carried the ball into the end zone, to touch the ball down on the ground? It appears this way in old films – I was just watching The Brute Man (1946), which had flashbacks to the eponymous character’s days as a college football star in 1930. Every time he scored, he would gently place the ball on the ground.
And when did they stop firing a gun at the end of the game?
Might’ve varied depending on the circumstances. I’ve been attending college games since 1971, and have never seen/heard a game with a gun. But they’ve always been games with electronic clocks on the scoreboard.
The relevant rule change appears to have occurred in 1930, when it was deemed “Not necessary for the referee to blow whistle to declare a touchdown”. (According to David M. Nelson, Anatomy of a Game)
I’m not certain exactly what had to happen, before that, for the referee to blow his whistle. The modern rule of a ball carrier being down any time anything other than his hands or feet touch the ground wasn’t enacted until 1932. So I don’t know that you had to touch the ball down before that time, but it was one way to ensure the necessary whistle.
I remember occasionally hearing guns during TV broadcasts of games, pro and college, as late as the early 1970’s. By that time, though, it wasn’t universal.
It probably depended on the facility. If you didn’t have a scoreboard with an up-to-date system, you probably stuck with the gun, since it was loud and hard to miss or mistake.
Sometime in the 90s, Lions’ linebacker Chris Spielman (as old school football a guy as you’ll find in attitude) picked up a fumble or intercepted a pass and ran it back for a touchdown. He did indeed then “touch down”, saying after the game that it was a tribute to the old time players.