Nikola Tesla Patent #17 – Dynamo Electric Machine – US 390415 A

Critical Features disclosed in this patent
1. Related to the patents of Tesla and Charles F. Peck, numbers: US381968 and US382280;
2. Ordinary forms of continuous and alternate current systems may be adapted to Tesla’s system, with slight changes to the systems;
3. Effects their forms;
4. Only the best and most practical solutions are presented to the three most common forms of the devices applicable;
5. Illustrated are the continuous (or closed) circuit machines, machines possessing armatures with coils connected diametrically (known as “open-circuits”), and machines with armature-coils of which have a common joint.

Note: Nikola Tesla was an inventor who obtained around 300 patents worldwide for his inventions. Some of Tesla’s patents are not accounted for, and various sources have discovered some that have lain hidden in patent archives. There are a minimum of 278 patents issued to Tesla in 26 countries that have been accounted for. Many of Tesla’s patents were in the United States, Britain, and Canada, but many other patents were approved in countries around the globe. Many inventions developed by Tesla were not put into patent protection.

Reference: Wikipedia

US390415