This page contains a photograph which is one of several belonging to the photo gallery pages which are part of several pages relating to
the invention of the world's first automatic totalizator in 1913, a system that facilitates galloping trotting and greyhound racing betting.
The Adders and Switchboard for win place and forecast pools, White City London 1933. In the foreground are two table mounted forecast pool adders one for the runner combination 2-5 and the other 2-4. Five adding shafts are visible across the tops of the tables. These contain solenoids that receive impulses from the ticket issuing machines, which cause escapements to activate allowing the rotation of the adding shafts. The rotation of each escapement on an adding shaft is summed by the epicyclic gear train. The scanners shown in the last two images in the White City section of the Photo Gallery multiplexes eight Ticket Issuing Machines onto each of these solenoids.
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