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Latimer’s Patent Drawing – Mechanical Railway Signal System

Drawing
This is a detailed technical drawing of a mechanized railway or trolley track signaling system, signed by Lewis H. Latimer. The schematic appears to depict a mechanism for controlling the movement of train or trolley components, potentially for automating track switches or signals. The system consists of gears, levers, and a spring-loaded mechanism, suggesting a manually or mechanically operated control device.
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Latimer’s Patent Drawing – Mechanical Railway Signal System picture number 2 Latimer’s Patent Drawing – Mechanical Railway Signal System picture number 3

This document is part of Lewis Howard Latimer's technical and engineering contributions to electric lighting and urban illumination systems. As an inventor and draftsman, Latimer was responsible for key innovations in carbon filament technology, patent drawings, and improving lighting systems. This schematic reflects his continued work in developing robust and efficient lighting solutions, possibly for public infrastructure, factories, or industrial settings.

The Lewis H. Latimer Papers (1870-1929, 1972) [QPL Subgroup]Latimer Family Papers (1870-1996 ) [QPL Full Collection]

"Fig. 2" appears next to the drawing, indicating multiple views of the invention in the full patent document. Handwritten text: "Inclu[ded] ground trolly truck"—suggesting that this mechanism was designed to be used with trolley or train systems. "Inventor: L. H. Latimer" with Latimer’s signature, confirming his authorship. "ATTEST;"—implying that witnesses confirmed the validity of this invention for patent approval.