FIRE-ALARM CALLS SENT OUT WITH PERFORATED PLATES (May, 1924)
Filed under: Communications — @ 3:05 pm
Source: Popular Mechanics ( More articles from this issue )
Issue: May, 1924
Buy on Ebay
Source: Popular Mechanics ( More articles from this issue )
Issue: May, 1924
Buy on Ebay
FIRE-ALARM CALLS SENT OUT WITH PERFORATED PLATES
By means of perforated plates fitted into the transmitting apparatus in the fire telegraph dispatching equipment of the new central station in the Bronx, New York City, alarms are relayed automatically to outlying stations. Simultaneous signals are sounded in a number of fire houses by means of electric connections formed when current is sent through the plates.
It’s a punch card?
Comment by jayessell — May 5, 2008 @ 5:18 am
It’s a punch card, but made out of metal so it lasts longer. See page 48 of http://www.tinaja.com/glib/hackar1.pdf , under the “LAN of the Eighties” heading, for a little more information on this system.
Comment by Matt — May 6, 2008 @ 8:46 pm