Other Exhibits
Other Exhibits
The National Museum of Computing has a wide range of exhibits which will appeal to all age groups.





Photo: Telegraph/Telex equipment © LSA June 2012.
| EXIT | Other Exhibits | Master Clocks | Punched Card Machines |

Introduction

Before the electronic age, mechanical and electro-mechanical devices were the only way to automate repetitive tasks and the Museum includes a wide selection. Here are just a few...
Master Clocks  
Master Clocks
A very neatly wired panel with Master Clocks No. 36 (left) No. 46 (centre) and a slave clock (right). The Battleship Grey relay case is just visible behind the VDU screen. This panel appears to operate the slave clocks throughout the Museum. And the clocks are showing the correct time too!

The Clock No. 36 has a one second beating pendulum and generates a pulse every 30 seconds, which is repeated via the relayset to the slave clocks. It also generates pulses of 1 second and 6 seconds duration for the control of telephone apparatus.

The Clock No. 46 has a half second beating pendulum with an output of pulses at intervals of: 1 second, 6 seconds, and three 1 second pulses during each 6 second period.





Photo: Master Clock panel © LSA June 2012.
Punched Card Machines  
A Card Sorter
Early computers used punched cards as the input media to both store and sort data.





Photo: A card sorter © LSA June 2012.
An ICT Card Processing Machine
International Computers and Tabulators Limited (ICT) were leaders in punched card machines.





Photo: An ICT card processing machine © LSA June 2012.

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