The Bren thread opened up the automatic rifle type.I am sure there are many others a few below from wiki Huot automatic rifle Howell Automatic Rifle / Howard Francis machine carbine Elkins Automatic Rifle Rieder Automatic Rifle Charlton Automatic Rifle
Found this link. Pretty interesting Semiauto Rifles of WWI and Before - The Firearm Blog Johnson rifle and LMG M1941 Johnson rifle - Wikipedia Pederson Device Pedersen device - Wikipedia