Roger Kinns
Biographic Data
| ID | 5653904 |
|---|---|
| NAME | Roger Kinns |
| GIVEN NAMES | Roger |
| FAMILY NAME | Kinns |
| SIGNATURE | KINNS R |
| AFFILIATIONS | Royal Prince Alfred Hospital |
| ORCID | 0000-0002-7032-4217 |
| VERIFIED | Yes |
| TOTAL WORKS | 6 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 6 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2014 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 0 |
Visual Time Signals for Mariners Between Their Introduction and 1947
The worldwide evolution of visual time signals for mariners during the period up to 1947 is explored in this paper. The emphasis is on their external appearance and how they were regarded by mariners for rating chronometers. The first accurate signals were established by the 1830s and the number of different locations increased steadily throughout the nineteenth century. The signals included time balls and time guns as well as many other devices …
Time Signals for Mariners in the Atlantic Islands and West Africa
The first time ball on an Atlantic island was established at Jamestown, St Helena in January 1834. It was one of the earliest operational time balls. New insights into preceding time ball trials at Portsmouth, England in 1829-1830 are presented. The primary time ball in St Helena was erected at the Ladder Hill Observatory, with a repeater time ball and a time gun. The Observatory was closed in 1836, but the time ball service continued with limite…
Time Signals for Mariners in South Africa
The aim of this paper is to establish the nature of visual time signals for mariners that used to exist in South Africa. It builds on earlier research concerning the Royal Observatory at the Cape of Good Hope, using Admiralty lists of time signals, notices to mariners and other sources to show how they evolved. South Africa used an extraordinary range of time signals, including the first shuttered lamp in 1823, one of the earliest time balls and …
Time Signals for Mariners in India, Burma and Ceylon
The East India Company played an important role in establishing time signals for mariners in India. The Company was replaced in 1858 by the India Office, a department of state. Subsequent reports to London included details of time signals and their performance. In 1860, there were time balls at Bombay, Madras and Calcutta, but their dates of introduction varied. Navigation guides and lists of time signals worldwide showed the subsequent developme…
The Time Balls of Mauritius
The time ball service at Port Louis, Mauritius started in April 1833, six months before the Greenwich service. It was established by John Augustus Lloyd who had been appointed Surveyor-General and Civil Engineer in 1831. He was a man of energy and initiative who soon developed a well-equipped observatory and a time service. His chosen arrangement, described in a presentation by Sir John Herschel in London during 1836, was unlike the design for Gr…
Did the Edinburgh Time Ball Really Weigh 15 cwt
For 160 years, the weight of the 1.5 m diameter Edinburgh time ball has been given as 15 cwt (762 kg). This stems from a remark in an 1853 paper by Charles Piazzi Smyth, that appears never to have been questioned. The descent of the ball, with its attached shaft, rack and piston has to be arrested by compression of air in a vertical cylinder having a diameter of 0.2 m. Air is bled from the cylinder during the ball descent in order to damp rebound…
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Did the Edinburgh Time Ball Really Weigh 15 cwt
For 160 years, the weight of the 1.5 m diameter Edinburgh time ball has been given as 15 cwt (762 kg). This stems from a remark in an 1853 paper by Charles Piazzi Smyth, that appears never to have been questioned. The descent of the ball, with its attached shaft, rack and piston has to be arrested by compression of air in a vertical cylinder having a diameter of 0.2 m. Air is bled from the cylinder during the ball descent in order to damp rebound…
Time Signals for Mariners in India, Burma and Ceylon
The East India Company played an important role in establishing time signals for mariners in India. The Company was replaced in 1858 by the India Office, a department of state. Subsequent reports to London included details of time signals and their performance. In 1860, there were time balls at Bombay, Madras and Calcutta, but their dates of introduction varied. Navigation guides and lists of time signals worldwide showed the subsequent developme…
The Time Balls of Mauritius
The time ball service at Port Louis, Mauritius started in April 1833, six months before the Greenwich service. It was established by John Augustus Lloyd who had been appointed Surveyor-General and Civil Engineer in 1831. He was a man of energy and initiative who soon developed a well-equipped observatory and a time service. His chosen arrangement, described in a presentation by Sir John Herschel in London during 1836, was unlike the design for Gr…
Time Signals for Mariners in the Atlantic Islands and West Africa
The first time ball on an Atlantic island was established at Jamestown, St Helena in January 1834. It was one of the earliest operational time balls. New insights into preceding time ball trials at Portsmouth, England in 1829-1830 are presented. The primary time ball in St Helena was erected at the Ladder Hill Observatory, with a repeater time ball and a time gun. The Observatory was closed in 1836, but the time ball service continued with limite…
Time Signals for Mariners in South Africa
The aim of this paper is to establish the nature of visual time signals for mariners that used to exist in South Africa. It builds on earlier research concerning the Royal Observatory at the Cape of Good Hope, using Admiralty lists of time signals, notices to mariners and other sources to show how they evolved. South Africa used an extraordinary range of time signals, including the first shuttered lamp in 1823, one of the earliest time balls and …
Visual Time Signals for Mariners Between Their Introduction and 1947
The worldwide evolution of visual time signals for mariners during the period up to 1947 is explored in this paper. The emphasis is on their external appearance and how they were regarded by mariners for rating chronometers. The first accurate signals were established by the 1830s and the number of different locations increased steadily throughout the nineteenth century. The signals included time balls and time guns as well as many other devices …
Geography (5 works) · History (5 works) · Computer Science (2 works) · History and Developments in Astronomy (2 works) · Maritime Navigation and Safety (2 works) · Ancient history (1 work) · Archaeology (1 work) · Artificial Intelligence (1 work) · Astronomy (1 work) · Ball (mathematics (1 work)