Fire extinguisher bombs and grenades were a real thing. Unfortunately the contents were toxic and you’d be screwed if you missed. Still, the wall mounted catapult that would fling the orb if the wall caught fire is a nifty idea. The images below link to larger versions.

f5c3316eb418a0ca6813ca7cf0123d18   fire-grenade  fire_bomb  Screen Shot 2012-10-25 at 7.05.21 AM   starrrrrrr_o