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Master Time Recording Clock

Technical Information

Catalogue No: C0820
Category: Corporate/Business
Object Type: Indicator/Instrument
Object Name: Master Time Recording Clock
Part No: Model 37
Serial No: 10424
Manufacturer: Magneta Time Company Limited
Division: Unknown
Year of Manufacture: circa 1960
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Main Store

Made in England
Magneta Trade Mark
Time Company Ltd
Goblin Works, Leatherhead.
Division of
the British Vacuum Cleaner & Eng. Co. Ltd.
BVC Trade Mark


This is a Master Time Clock which was installed on the Ground Floor of Tower 1 at Rochester and it would have driven a number of Slave Clocks located around the site. The clock is a type 37 electrically controlled master clock having a 1 second beating pendulum. It provides 1 second, 6 second and half minute pulses for the operation of the slave pulse clocks. The RAA does not hold any of the original slave clocks. These clocks replaced the old mechanical clocks in the 1960's

The pendulum on its rod weighs about 5kg.

It was common practice to have a time recording system for employees which involved stamping a Time Card with the time that the employee arrived or left work.
The cards were stored in numbered racks adjacent to the machines. The wages clerks would calculate the pay for employees from the information printed on each card at the end of each week. The early machines required the employee to insert a card into a slot in a ‘Clock Machine’ and then to manually depress a lever to stamp the card; a process known as Clocking in or Out’. Later machines automatically stamped the card when it was inserted. The Clock Machine had an integral clock and sometimes these were stand alone but in a large organisation it was important that all the Time Clocks registered the same time so they were synchronised to a Master Clock. The Master Clock system included a programmeable unit on which events could be preset such as weekends or National holidays.

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