Egryn

Photograph © John Ruston 2000

Balance beam and support sheaves

Detail of the balance beam and support sheaves which can be seen in the above pictures of the loading point. There are two such assemblies at this location.

Roe’s Patent was for a single rope system (i.e. no separate suspension rope, the buckets being supported by the haul rope). At each standard the rope passed over two (as at Egryn) or four sheaves mounted on pivoted beams that aligned themselves to the rope and so equalised the load on each sheave. This allowed the standards to be spaced further apart, one example mentions a spacing of 250 yards on a 4000 yard long system. [Enc Brit 1911 v. 7 p. 64].

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