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Description of a Tubular Pendulum having All the Properties of the Gridiron but Being more compact as well as more steady in its Motions.

Catalogue no: 1497
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Edward Troughton
Total pages: 7 Illustrations: 1 Language(s): English Publication date: 1804
Editor: Publisher: Philosophical Journal?
Dimensions: 210mm x 130mm Condition: Reasonable
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Notes:

A separately published offprint, in the form of a letter to Mr Nicholson, Author of the Philosophical Journal, originally published in that journal in December, 1804.

Although firstly a maker of telescopes and other astronomical instruments, the author describes how he has been making pendulums for twenty years, "...and I own the subject is still agreeable to me, being yet unencumbered with patents, the reason of which no doubt is, that the few wanted hold out no prospect of gain."

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Search terms: Pendulums, Precision Timekeeping
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On the Discordancies in the Results of the Methods for determining the Length of the simple Pendulum

Catalogue no: 1496
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Francis Baily, Esq. F.R.S.
Total pages: 8 Illustrations: 0 Language(s): English Publication date: 1829
Editor: Publisher: Unknown
Dimensions: 230mm x 150mm Condition: Reasonable, a little regged with tears
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Notes:

pp.97-104 extracted from an unknown publication (Though possibly Philosophical Transactions) and bound separately between paper covers.

Written in ink on front cover: "Length of Simple Pendulum by Francis Baily"

Content of text is best described in first sentence:

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Concerning Pendulums

Catalogue no: 1495
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Unknown
Total pages: 46 Illustrations: 1 Language(s): English Publication date: c.1793
Editor: Publisher: Lectures on Natural Philosophy
Dimensions: 210mm x 135mm Condition: Good
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Notes:

A full account of the definition and theory of pendulums, isochronism, cycloidal arcs and compensation.  Examples given of how to solve pendulum problems, lengths etc.

Final section concerns the nature of time with many references to the Divine influence God.

Pull out engraving shows different pendulums, experiments and a dead beat escapement.

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On Isochronous Time-Keepers

Catalogue no: 1494
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Thomas Reid
Total pages: 3 Illustrations: 0 Language(s): English Publication date: 1815
Editor: Publisher: Philosophical Magazine and Journal
Dimensions: 230mm x 145mm Condition: Reasonable
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Notes:

Pages extracted from this journal and bound separately between card covers.

A published letter in response to a letter from a Mr Tillock in a previous edition of this magazine (May 1815). 

Concerns the secure fixing and proper suspensions of pendulums with mention of John Ellicott clocks and those of Mr. De Lue.  A foot note describes the means by which a clock is brought to time at this period.

 

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Pendulum Researches and Improvements

Catalogue no: 1493
Dewey No: 681.1124 L. DEN Subject(s): Courtenay Ilbert Archive
Author(s): E.I.Dent
Total pages: 8 Illustrations: 0 Language(s): English Publication date: 1838
Editor: Publisher: The British Association for the Advancement of Science
Dimensions: 165mm x 105mm Condition: Reasonable, cover dirty and with tears
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Abstract of Mr Dent's Paper on Pendulums, presented to The British Association for the Advancement of Science at Newcastle-Upon- Tyne, September, MDCCCXXXVIII.

Facts relating to the Effects of Temperature on the Regulators of Timekeepers; and Description of some recent Improvements in Pendulums, with Observations, Delineations, and tabulated Experiments.

The paper is arranged under three headings, as follows;

1. The compound effect of variable temperature upon the regulating machinery of Timekeepers.

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Chamberlain Articles

Catalogue no: 1492
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Major Paul M. Chamberlain. Others
Total pages: Illustrations: Multiple Language(s): English Publication date: c.1920-1935
Editor: Publisher: See Notes below
Dimensions: 340mm x 250mm Condition: Pages loose, ragged edges
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Notes:

A collection of articles mostly written by Paul M. Chamberlain and contained loose within a brown folder, some contained within an envelope addressed to Ilbert from Chamberlain.

From a twoAmerican publications including The Jewellers' Circular and The National Jeweller.

Subjects include;

Development of the Escapement

Some Notes on the History of Balance Springs (two copies)

An Arnold Pocket Chronometer

Making Better Watchmakers for America

American Horologists to be Honoured at Coming Convention of Horological Institute of America

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Search terms: Antique Watches, Escapements
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Bonniksen. Timing Lecture. A compilation of articles/material relating to the watchmaker Bahne Bonniksen

Catalogue no: 1491
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Bonniksen and others
Total pages: 22 Illustrations: 6 Language(s): English Publication date: 1895-1906
Editor: Publisher: Details in Notes below
Dimensions: 280mm x 220mm Condition: Reasonable, a little dog-eared and dirty
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Notes:

Various articles and leaflets mostly concerning the watchmaker Bahne Bonneksen, stapled between paper covers.  Written in ink on front cover, "Bonniksen. Timing Lecture.

Contents include the following:

1. Patent No. 16, 623, A.D. 1895. Improvements in Tourbillon Watches.

Patent specification and illustration of Andrew Taylor's annular tourbillon.

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Search terms: Horological Biography, Horological Patents, Precision Watches
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A Compilation of nine articles from 'The Repertory of Arts and Manufaturers' 1795-1802

Catalogue no: 1490
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Listed below in Notes
Total pages: 40 Illustrations: 9 Language(s): English Publication date: 1795-1802
Editor: Publisher: Repertory of Arts and Manufacturers
Dimensions: 230mm x 150mm Condition: Reasonable, ragged around edges
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Notes:

Full title of publication as follow;

The Repertory of Arts and Manufactures: Consisting of Original Communications, Specifications of Patent Inventions, and Selections of Useful Practical Papers from the Philosophical Societies of All Nations, &c. &c.

Pages extracted from different volumes of this publication and bound separately by Ilbert betweem marbled paper covers.

Articles included as follows:

1. Description of a Pendulum on a new Construction, by the Rev. Mr Pine.

Details of a new form of bi-metallic compensation pendulum with illustration.

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Search terms: Escapements, Horological Technology
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Observations for proving the Going of Mr Elliott's Clock at St. Helena

Catalogue no: 1489
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Charles Mason
Total pages: 9 Illustrations: 0 Language(s): English Publication date: 1762
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 220mm x 175mm Condition: Good
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Notes:

A report of the lecture given to the Society by Charles Mason on May 6th, 1762.

Concerns the clock taken to the Cape of Good Hope for observations and which was set up on St Helena on the journey back to Britain.  The Rev, Mr Maskelyne assisted with the observations.

Five pages of charts follow detailing the performance of the clock.

There follows "An Account of Mr Mason's Paper, concerning the Going of Mr Elliott's Clock, at St Helena: by James Short," read to the Society on May 13th, 1762.

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Search terms: Precision Timekeeping
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Greenwich Mean Time

Catalogue no: 1488
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Unknown
Total pages: 4 Illustrations: 1 Language(s): English Publication date: 1872
Editor: Publisher: People's Magazine
Dimensions: 270mm x 180mm Condition: Good
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Notes:

Pages extracted from this journal and published separately between paper covers.

Much of the text concerned with the meaning of and differencies between mean and solar time.  The need for accuracy of timekeeping in the railway age explained and the various means of distributing time signals.  Also the method of determining the correct time at Greenwich by astronomers.

Illustration shows the Old Royal Observatory.

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Search terms: Horological History
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