ADVERTS - Speaking Clock
posters
BRILLE CLOCK - Shipped to
Lagos by GEC
CALCULAGRAPH -
Used on trunk switchboards
CENTRAL TELEGRAPH OFFICE (CTO)
CLOCKS - The full list
CLOCK
UNIT, GMT 34
CLOCK
UNIT, GMT 35
DEAL - TIME BALL
DISTRIBUTION OF MEAN TIME
- Overview diagram - 1925
DISTRIBUTION OF TIME IN THE BPO -
Description
DISTRIBUTION OF
TIME SIGNALS - Exchange buildings - Pictorial
DISTRIBUTION OF
TIME SIGNALS - Exchange buildings - Description
DISTRIBUTION OF TIME SIGNALS
- General time distribution to and from the CTO.
DISTRIBUTION OF TIME SIGNALS
- Article about time control in the PO - 1930
DISTRIBUTION OF TIME SIGNALS
- Extract from above - GMT to CTO and Rugby
INTERNATIONAL TIME - POEEJ
article for 1928
INSTALLATION IN PUBLIC OFFICES
INSTALLATION IN TELEPHONE EXCHANGES
MAGNETA CLOCKS
MECHANICAL
CLOCKS - Description (Wind up)
PULSE
CLOCKS - Description (30 second)
RECORDERS, TIME, ELECTRICAL -
Used for time stamping forms in Telegraph offices
RECORDERS, TIME, RADIAL - Clocking
in/out machines / Time recorders
RELAY TYPE 90A
ROYAL OBSERVATORY - GREENWICH -
Apparatus and Buildings
SPEAKING CLOCK - Mark 1
SPEAKING CLOCK - General Information
on all clocks and voices
SYNCHRONOUS CLOCKS - Description
(Mains)
TIM - Speaking clock
TIME - Post Office overview
UNIT, CLOCK PULSE No. 1
WATCHES
WATCHMANS SYSTEM - Gents
WIRING OF ELECTRIC CLOCKS -
GPO diagram
ARTICLE
ON BATTERIES USED ORIGINALLY ON GREENWICH TIME SIGNALS
BROKEN SUSPENSION SPRING! -
Click Here
EDDIE
MAIR TALKS ABOUT THE SPEAKING CLOCK
ERICSSON
TIME RECORDERS
GET
YOUR PULSE CLOCKS WORKING WITHOUT A MASTER CLOCK
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Prefixes
A - Pulse type (DC)
B - Synchronous type (AC mains)
C - Mechanical type (non-electric)
Mechanical clocks are always odd numbers.
QUICK
FIND - Clock Thumbnails
Click here for Simon
Taylor's GPO Clock site
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