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History
Shepherd Gate Clock
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The Shepherd Gate Clock is mounted on the wall outside the gate of the Royal Observatory, Greenwich building in Greenwich, Greater London. The clock, an early example of an electrically connected clock system, was a sympathetic clock mechanism controlled by electric pulses transmitted by a motor clock inside the main building. The network of 'sympathetic clocks' was constructed and installed by Charles Shepherd in 1852. The clock by the gate was probably the first to display Greenwich Mean Time to the public, and is unusual in using the 24-hour analog dial. Also, it originally showed astronomical time which started at 12 noon, not midnight.
The Shepherd Gate Clock at the entrance to the Royal Observatory, Greenwich. It shows Greenwich Mean Time all year round.
The Shepherd Gate Clock at the entrance to the Royal Observatory, Greenwich. It shows Greenwich Mean Time all year round.
Mechanism of the clock – on display but not in use
Mechanism of the clock – on display but not in use
Flamsteed House (with its red time ball) overlooks the Gate clock, 1960
Flamsteed House (with its red time ball) overlooks the Gate clock, 1960
Royal Observatory, Greenwich
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The Royal Observatory, Greenwich is an observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north. It played a major role in the history of astronomy and navigation, and because the Prime Meridian passed through it, it gave its name to Greenwich Mean Time, the precursor to today's Coordinated Universal Time (UTC). The ROG has the IAU observatory code of 000, the first in the list. ROG, the National Maritime Museum, the Queen's House and the clipper ship Cutty Sark are collectively designated Royal Museums Greenwich.
Royal Observatory, Greenwich. A time ball sits atop the Octagon Room.
Royal Observatory, Greenwich. A time ball sits atop the Octagon Room.
The Airy Transit Circle, used for over a century (1851–1953) as the reference point when charting the heavens and determining times, thus earning for
The Airy Transit Circle, used for over a century (1851–1953) as the reference point when charting the heavens and determining times, thus earning for it the epithet "the centre of time and space"
The building housing the origin of the Greenwich Prime Meridian, marked by the brass strip in the foreground. The apex of the roof opens up above the
The building housing the origin of the Greenwich Prime Meridian, marked by the brass strip in the foreground. The apex of the roof opens up above the white vertical strips (joints in the eaves are visible) to allow telescopic star sightings to be made.
The Shepherd Gate Clock at the gates of the Royal Greenwich Observatory. This clock shows Greenwich Mean Time all year round, ie. it is not set to Bri
The Shepherd Gate Clock at the gates of the Royal Greenwich Observatory. This clock shows Greenwich Mean Time all year round, ie. it is not set to British Summer Time in the summer.