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Brian Huggett
March 2019
Page 26
Page 26
Details the creation of 'Mark III', an improved, portable equatorial heliochronometer. Key features include mechanisms for latitude adjustment (co-latitude scale), longitude correction (rotating the outer EoT scale), and a design for the date scale that minimises readability issues by allowing it to move in an arc. It uses Kevlar string for the gnomon and PTFE tape for smooth movement.
DIY Sundial Projects, Dials: Heliochronometer, Equation of Time, Sundial Design & Layout
March 2018
Page 28
Page 28
Details the creation of a second, improved equatorial heliochronometer, 'Mark II'. This design is smaller and more portable than the first model. It incorporates a precise rotation mechanism (belt and pulley system) and an Equation of Time correction method based on the Pilkington Sol Horometer, which also accommodates automatic adjustment for GMT/BST transitions.
DIY Sundial Projects, Dials: Equatorial, Dials: Heliochronometer, Equation of Time
September 2017
Page 36
Page 36
This details the design and construction of a DIY equatorial heliochronometer intended to show clock time easily. It compensates for latitude, longitude, BST, and EoT by allowing the time scale (mounted on a rotating dial plate annulus) to be physically rotated via an acrylic pointer aligned to an EoT graph. The gnomon is a thin, tensioned stainless steel wire.
DIY Sundial Projects, Dials: Equatorial, Dials: Heliochronometer, Sundial Design & Layout
December 2017
Page 21
Page 21
A detailed report on the BSS one-day meeting, summarising talks on topics including the Fort Belan sundial, DIY heliochronometers, multi-centre delineation, promotion via social media, the astronomical Culpeper dial, the Gnomonical Universal Nomograph (GUN), and the mechanical generation of the Equation of Time using equation clocks.
Dials: Heliochronometer, Equation of Time, Historical Dials, The BSS and Members