Boyd's View Traditional Cache
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Boyd's Automatic tide signalling apparatus "or Pilot House at Irvine harbour in North Ayrshire, Scotland [...] is probably unique, having been invented and patented by Martin Boyd, the Irvine harbourmaster, in 1905 and opened in 1906."
The system entailed the provision of a floating chamber, or 'Tide gauge' [...] in this case made of timber, situated at some distance from the structure and calibrated in such a manner as to represent the tide depth at the harbour bar. In the case of Irvine, the bar and the flotation chamber are some distance apart. Within the chamber a wooden float like a raft rose and fell according to the tide. Attached to this float was a cable, which ran through a wooden trough to the building, named the 'Pilot House' by the locals [...] which housed the apparatus. Changes in direction, the difference between the actual tide heights and the distance between the balls/lights, was achieved by pulleys and gearing. Within the building the cable was attached to eclipsers, metal frames with wheels which ran on rails attached to the building. The eclipsers, two in number, rose and fell with the tide. As the eclipser rose, it covered apertures through which a gas light had been previously observed. This light, from the main gas supply, was automatically switched off as the eclipser continued up but a by-pass jet always remained alight to maintain a supply to the main jet when the eclipser descended. At night the tide depth was indicated by the use of lights which diminished in number as the tide went out and vice versa.
The Pilot House - The fifty foot tower which housed the system was completed in 1906 and the external facings of the brick building are harled and painted white to make it visible for some distance from out at sea. To this day it is a useful landmark for users of small craft.
Text source: http://en.wikipedia.org/wiki/Boyd%27s_Automatic_tide_signalling_apparatus
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Ng gur srapr. Ybj.
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