Slave clocks, which were an integral part of the synchronized time system, now are often replaced with battery operated clocks that are linked to the atomic clock signal for synchronizing.
32.
Clock networks usually consist of a central master clock kept in sync with an official time source, and one or more slave clocks which receive and display the time from the master.
33.
These types of clocks were made as individual timepieces but more commonly used in synchronized time installations in schools, businesses, factories, railroads and government facilities as a master clock and slave clocks.
34.
Where s ( t ) represents the time measured by the slave clock at physical time t, and m ( t ) represents the time measured by the master clock at physical time t.
35.
Many hundreds of thousands of slave clocks and probably tens of thousands of master clocks were manufactured, sold, installed and serviced by people involved in the exact-time-for-sale business.
36.
From the late 19th to the mid 20th centuries, electrical master / slave clock systems were widely used in public buildings and business offices, with all the clocks in the building synchronized through electric wires to a central master clock.
37.
In 1849, Charles Shepherd Junior ( 1830 1905 ), an engineer and son of a clockmaker, patented a system for controlling a network of master and slave clocks using electricity ( or galvanism, as it was called ).
38.
To adjust for the transit time of the signal from the master clock to the slave clock, the phase of the slave clock may be adjusted with respect to the signal from the master clock so that both clocks are in phase.
39.
To adjust for the transit time of the signal from the master clock to the slave clock, the phase of the slave clock may be adjusted with respect to the signal from the master clock so that both clocks are in phase.
40.
G . 8262 / Y . 1362 is an ITU-T recommendation for Synchronous Ethernet that defines " timing characteristics of synchronous Ethernet equipment slave clock ( EEC ) . " It was first published in August 2007, amended in 2008 and 2010 and a new version published in 2010.
