The Portable Projector; Its Present Status and Needs
Alexander F. Victor · Transactions of the Society of Motion Picture Engineers · 1918
Those of you who ventured into the new and untried, in the days when the motion picture was an undeveloped possibility, may recall that the first projectors were readily and easily portable. At that early stage of the industry, motion picture projectors were made as attachments to such types of optical lanterns as were then in use.