Patent for a light projecting apparatus by E. W. Sohlberg
type: Item
description: Patent for a spotlight, controlled from a distance by ropes, and a color chaning device controlled with a electromagnetic step by step control.
Type of information: source
Field: lighting and projection
author: Edwin Sohlberg
Copy available online: en
Publication date: 1906-05-01T00:00:00Z
mentions: Remote controlled fixture
Internal image: US819611_Pagina_01.jpg
Canon documents public id: 1055