I think it was Goliath. We used to use these in some theatre lights many moons ago. I bet I’ve still got some if I look hard enough. These have been superseded by halogen lamps with bipin ceramic bases.
We always carried 2 way B22 adapters with out public address kit [which all had 2 pin 5A plugs] and commonly connected to a lamp for our power. The thoughts of non earthed microphones etc gives me the heeby geebies now. Someone deciding to turn lights off for a 'slow dance resulted in losing the music on more than one ocassion.
I remember the bathroom heaters which plugged into a B22 and a 4 position pull switch for light, 1KW heater, both, off.
I'd imagine the current limiting factor will be the spring or spring tension.
I don't recall where it came from, we had a 1200W version laying around for a long time. When we wanted a decent load on a generator to prevent it doing too much revving and stalling, on amateur radio field events, I soldered 2 wires onto the ES base and suspended it on a pole beside the generator - cap up. It worked a treat until the solder melted.I think it was Goliath. We used to use these in some theatre lights many moons ago. I bet I’ve still got some if I look hard enough. These have been superseded by halogen lamps with bipin ceramic bases.