Name/Title
Luminous Effect, (1 folder, ca. 1890)Scope and Content
This blueprint, pertaining to a lawsuit, Stanley Electric Manufacturing Company vs Toledo Port Clinton & Lakeside Railway Company, probably relates to Lewis Latimer’s work as a patents expert for the Edison interests. It is unclear whether Latimer himself drafted this blueprint, since his initials or signature don’t seem present. 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.Context
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.Collection
Latimer Family Papers (1870-1996 ) [QPL Full Collection]Location
Folder
409os/14Box
409Archival Collection
Latimer Family Papers (1870-1996 ) QPL CollectionLibrary
Queens Borough Public LibraryCity
Jamaica, QueensState
New York, USAContinent
North AmericaCountry
United States