I can remember our projection booth. The walls were lined with metal, the openings to the theater were on a heat link to close in case of a fire. That was a hold-over from when they used nitro-cellulose film which was highly flamable. Our projectors were once used on the Battle Ship Missouri. So They were from the 1940's. I do remember the Carbon arc lamps. Before a movie you made sure you had enough length of copper coated Carbon rods to last the move, or you had to do a quick change of rods when that projector was not running a reel. You received reels tails out, You had to rewind them and check for any breaks and if found you had to splice the film before showing. Hard but I liked the job.
Some feature length films used three or four spools, but you would change over projectors for that, signaled by big round flashes on screen, first flash is to start the next projector and second flash to open the apeture on one and close on the other! If you had a frame freeze, the ark would burn through the film instantly, and you would have to cut out the burnt film and splice the ends back together. Electrodes were changed out between spools.
We are setting up a similar projector and want to try the carbon arc also. What is the modern rectifier uou are using? What are the important features for this type? Thanks.
So the lamp is burning right? And maybe you have to replace with a new one after showing one or two movies in my opinion. What I remember is that the film burns if it gets stuck for some reason. So this shows the intense heat the lamp produces.
Trabalhei muito tempo com o carvão, os melhores eram o Lorrayne, francês. depois com a xenon, mas parece que luz do carvão é melhor. nada vai substituir a película.. a qualidade é outra.
