The Hot Sheet

Communications: Murphy Call Box

By CPHS / 01 May 2020

In 1907, Jerry Murphy developed his most efficient and successful version of the call box system.  The new call boxes were significantly smaller – still tall, but made of steel…

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Criminal Identification: Fingerprinting

By CPHS / 25 April 2020

In 1904, George Koestle and Chief of Police Fred Kohler traveled to the St. Louis World’s Fair to witness a demonstration of a new method of criminal identification, fingerprinting.  Based…

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Early Electric Traffic Signals

By CPHS / 21 April 2020

Many more attempts at designing a functional traffic signal followed. In 1916, Clevelanders John Tomko, CW Oppenlander and SW Oppenlander invented an “electric semaphore” for “minimizing traffic hazards.” The device…

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Eliot Ness’ Final Resting Place

By CPHS / 18 April 2020

The Memorial Service for Eliot Ness, his wife Elisabeth and their son Robert took place on September 10, 1997, organized by the Cleveland Police Historical Society and Museum. The service…

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Traffic Semaphore

By CPHS / 12 April 2020

The Cleveland Police used traffic semaphores to bring order and safety to our streets.  The officer set up the semaphore in the middle of the intersection and controlled the flow…

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