Patents

Specification of Edward John Dent - Balance Springs for Timekeepers - No. 7067

Catalogue no: 1031
Dewey No: Subject(s): Patents
Author(s): Edward John Dent
Total pages: 3 Illustrations: None Language(s): English Publication date: 1836
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover very fragile and worn
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Notes:
Relates to "An Improvement of the Balance Springs and their Adjustments of Chronometers and other Timekeepers". This patent describes the use of a flexible varnish that would protect the balance spring from rust but not affect its performance. Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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Specification of George Prior - Chronometers - No. 4214

Catalogue no: 1022
Dewey No: Subject(s): Patents
Author(s): George Prior
Total pages: 4 Illustrations: 1 Language(s): English Publication date: 1818
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
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Notes:
An invention , "For perfectly Detaching the Escape Wheel of Chronometers from the Influence of the Friction and Inaccuracies arising from the Main-Spring, the Pivots, and the Teeth, and all the other Wheels and Pinions in the Machine, during the Time of its giving Impulse to the Balance, whereby the Vibrations will be more accurately and uniformly supported than by any other Invention heretofore made public, which Invention will be much benefit and Utility for producing a superior Rate of Time-keeping." Malcolm Gardner, Horological Bookseller sticker on blue cover and first page.
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Secification of John Roger Arnold - Expansion Balance For Chronometers - No. 4531

Catalogue no: 1023
Dewey No: Subject(s): Patents
Author(s): John Roger Arnold
Total pages: 3 Illustrations: 1 Language(s): English Publication date: 1821
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
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Relates to, "A New or Improved Expansion Balance for a Chronometer". Describes a bi-metallic balance which has two vertical arms, each with a weight that is moved either towards the centre of the balance or away from it when the temparature rises or falls. Reprint of 1857
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Specification of James Ferguson Cole - Chronometers - No. 4530

Catalogue no: 1024
Dewey No: Subject(s): Patents
Author(s): James Ferguson Cole
Total pages: 5 Illustrations: 1 fold out Language(s): English Publication date: 1821
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
Related titles: Its About Time, by P. Chamberlain, pp 402-10. Related library records:
Notes:
Relating to, "Certain Improvements in Chronometers". Chamberlain describes this patent, "It was a pivoted detent escapement with safety pin, a locking plate on the balance staff, the passing spring in a reversed position, balance of a solid steel disc turned thin between hub and rim, a compensation giving effective lengths to balance spring and adjusted by tangent screw". Reprint of 1857
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Specification of Frederick Louis Fatton - Astronomical Instrument or Watch - No. 4645

Catalogue no: 1025
Dewey No: Subject(s): Patents
Author(s): Frederick Louis Fatton
Total pages: 9 Illustrations: 1 fold out Language(s): English Publication date: 1822
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile and torn
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Notes:
Relating to; "An Astronomical Instrument or Watch, by which the Time of the Day, the Progress of Celestial Bodies, as well as Carriages, Horses, or other Animals, may be correctly ascertained". The concluding paragraph describes the innovation as follows;
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Specification of Frederick Louis Fatton - Watches - No. 4707

Catalogue no: 1026
Dewey No: Subject(s): Patents
Author(s): Frederick Louis Fatton
Total pages: 8 Illustrations: 1 fold out Language(s): English Publication date: 1822
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Paper covers fragile, Illustration torn
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Notes:
Relating to; "Certain Improvements on or Additions to Watches or Chronometers in general, whereby they may be rendered capable of Marking or Indicating the Precise Moment of any desired Observation, or Rapid Succession of Observations, and without the Necessity of Stopping the Regular Movement of the Watch, as in ordinary Stop-Watches." Reprint of 1857 Malcolm Gardner, Horological Bookseller sticker on front cover and first page
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Specification of William Congreve. Clocks, Chronometers, &c. No. 3164

Catalogue no: 1016
Dewey No: Subject(s): Patents
Author(s): William Congreve
Total pages: 13 Illustrations: 1 fold out Language(s): English Publication date: 1808
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile. Torn illustration
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Realtes to, "A New Principle of Measuring Time and Constructing Clocks and Chronometers". The patent deals with the rolling ball clock and the illustrations give details of three types of timekeeper utilising a rolling ball. Reprint of 1856
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Specification of Joseph Anthony Berrollas - Watches - No. 3174

Catalogue no: 1017
Dewey No: Subject(s): Patents
Author(s): Joseph Anthony Berrollas
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1808
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile and torn
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Notes:
Relates to, "Making Infallible Repeating Watches". Gives details of the repeating mechanism operated by a screw pendant. All parts of the mechanism illustrated both assembled and disassembled. Reprint of 1856 Malcolm Gardner, Horological bookseller sticker on front cover
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Specification of Joseph Anthony Berrollas - Alarum Watches - No. 3342

Catalogue no: 1018
Dewey No: Subject(s): Patents
Author(s): Joseph Anthony Berrollas
Total pages: 3 Illustrations: 1 Language(s): English Publication date: 1810
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
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Relates to "A Warning Watch on a New Construction". An early alarm mechanism. Reprint of 1856 Together with this patent is an advertisement sheet for this watch, 220mm x 135mm. "By His Majesty's Royal Letters Patent. THE WARNING WATCH". Following a description of the features of this watch is; "Manufactured and Sold by S.A.Berrollas, Wilson Street, North Place, Grays Inn Lane; C.E.Viner, 151, New Bond Street, London; Robert Roskell, Church Street, Liverpool" Hand written, and possibly relating to C.E.Viner, is the following; "or Aply Ho. Mincer St Greenall"
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Specification of Samuel Smith - Escapement for Watches - No. 3620

Catalogue no: 1019
Dewey No: Subject(s): Patents
Author(s): Samuel Smith
Total pages: 2 Illustrations: None Language(s): English Publication date: 1812
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
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Notes:
Relating to, "An Inproved Escapement for Watches by an Invention calculated to make them Beat Dead Seconds from Principle and Parts of Seconds, by means of Clock Pallets attached to a Lever operating on a Vertical Wheel". This is the patent detailing what is now known as the Horizontal Lever Escapement. Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on front cover and first page.
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