Luminous Effect, (1 folder, ca. 1890)
Archive
The schematic outlines various circuit formations and configurations within the controller, detailing energized coils (solid lines) and short-circuited coils (dotted lines) in different motor control positions. The diagram provides insight into early electrical control mechanisms used in railway and industrial applications, illustrating switching sequences, coil arrangements, and transformer positions. This document is an important historical artifact showcasing early advancements in electrical engineering and patent litigation.

This blueprint is part of an exhibit in a legal dispute between the Stanley Electric Manufacturing Company and Toledo Port Clinton & Lakeside Railway Company concerning Henry Patent 705,241. The document serves as Broadhurst Exhibit No. 6, demonstrating the technical details of Bullock Electric Manufacturing Company’s Series Parallel Controller, Type 150A, which was used for controlling two motors.
Latimer Family Papers (1870-1996 ) [QPL Full Collection]
409os/14
409
Latimer Family Papers (1870-1996 ) QPL Collection
Queens Borough Public Library
JamaicaQueens
New York, USA
North America
United States