Cloch

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Cloch Lighthouse
060609-Cloch-Lighthouse.jpg
Cloch Point light from the north, looking towards Innellan
Cloch
Location Firth of Clyde
NS202758
OS grid NS2031975877
Coordinates 55°56′32″N4°52′44″W / 55.94232°N 4.87877°W / 55.94232; -4.87877
Tower
Constructed1797
Built by Thomas Smith, Robert Stevenson   OOjs UI icon edit-ltr-progressive.svg
Constructionwhite tower with a black band
Height76 feet (23 m)
Operator Clyde Port Authority   OOjs UI icon edit-ltr-progressive.svg
Heritagecategory B listed building  OOjs UI icon edit-ltr-progressive.svg
Fog signal (c.1895)
Light
Focal height76 feet (23 m)
Light sourceOil (1797–1829)
argand lamp (1829–c.1900)
acetylene (c.1900–)
Intensity40,000 candela
Range14 nautical miles
Characteristic Fl. W 3sec

Cloch or Cloch Point (Scottish Gaelic : stone) is a point on the coast of the Firth of Clyde, Scotland. There has been a lighthouse since 1797 to warn ships off The Gantocks.

Contents

Location

Cloch Point lies on the A770, north of Inverkip, three miles south-west of Gourock, on the east shore of the Firth of Clyde, directly opposite Dunoon.

Lighthouse

The Cloch Lighthouse was designed by Thomas Smith and his son-in-law Robert Stevenson. The building was completed in 1797. There appear to be two generations of keepers' houses, the older now used as stores and the more recent having crow-stepped gables. The short circular-section tower has a corbelled walkway and triangular windows. The foghorns were added between 1895 and 1897.

Cloch Point Lighthouse Cloch lighthouse.jpg
Cloch Point Lighthouse

The light was built by John Clarkson (engineer); Kermack and Gall built the tower, while Smith and Stevenson installed the oil lantern which was first lit on 11 August 1797. [1] The light was replaced in 1829 with an argand lamp and silvered reflector. About 1900, it was lit with acetylene. A radio beacon was installed about 1931.

The dioptric and catadioptric lenses floated in baths of mercury and were rotated by a clockwork mechanism powered by falling weights. [2] As well as tending the light, the keepers had to wind the mechanism by hand every two to three hours.

Today, the light is fully automated and unmanned. The main light has been replaced by a light on a pole outside the lantern room.

See also

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References

  1. "Inverkip, The Cloch Lighthouse". Royal Commission on the Ancient and Historical Monuments of Scotland . Retrieved 16 January 2011.
  2. "Overview of Cloch Lighthouse". Gazetteer for Scotland . Retrieved 16 January 2011.

Further reading