The Great Seal Patent Office

Specification of Charles Hanson - Clocks and Watches - No. 10,876

Catalogue no: 1043
Dewey No: Subject(s): Patents
Author(s): Charles Hanson
Total pages: 5 Illustrations: 1 fold out Language(s): English Publication date: 1845
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile
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Notes:
Relates to; "Certain Improvements in Clocks, Watches, or Timekeepers". Several drawings on fold out page illustrating the patent described as follows; "The novel construction of detent for locking the escapement wheel of timekeepers". "The construction and arrangement of locking apparatus". "The application of a spring to the verge staff in place of the rigid pallett." Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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Specification of John Peter Isaie Poncy - Clocks and Chronometers - No. 8602

Catalogue no: 1039
Dewey No: Subject(s): Patents
Author(s): John Peter Isaie Poncy
Total pages: 6 Illustrations: 1 fold out Language(s): English Publication date: 1840
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile
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Notes:
Relates to; Improvements in Clocks and Chronometers". The patent involves, "the mode of constucting chronometers and clocks, in order to their going for a longer period without being wound up, and in such a manner that two mainsprings are used in combination with what I call a constant power or regulator, whereby the power of the two springs is transmitted to the escapement by means of such constant power or regulator." Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on cover and first page
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Specification of Edward John Dent - Chronometers and Other Timekeepers - No. 9302

Catalogue no: 1041
Dewey No: Subject(s): Patents
Author(s): Edward John Dent
Total pages: 9 Illustrations: 1 fold out Language(s): English Publication date: 1842
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Paper cover very fragile
Related titles: Edward John Dent by Vaudrey Mercer (S2) Related library records:
Notes:
Relates to; "Certain Improvements in Chronometers and other Timekeepers". The patent describes a secondary compensation device for a chronometer balance (a primary compensation with my continuous secondaty compensation). Also, "the simultaneous locking of two escape wheels by one locking spring in a chronometer or other portable timekeeper". Reprint of 1856
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Specification of Edward Massey - Watches - No. 9120

Catalogue no: 1040
Dewey No: Subject(s): Patents
Author(s): Edward Massey
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1841
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover very fragile and torn in half
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Notes:
Relating to; "Improvements in Watches". The fold out page contains 9 drawings pertaining to the following details of the patent; 1. Modes of compensation 2. The arrangement of locking pallets 3. Keyless winding mechanism. 4. The mode of striking at every fifth second by altering the position of the watch Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on cover and first page
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Specification of John Richard Lund - Chronometers - No. 9969

Catalogue no: 1042
Dewey No: Subject(s): Patents
Author(s): John Richard Lund
Total pages: 6 Illustrations: 3 fold out Language(s): English Publication date: 1843
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile
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Notes:
Relates to; "Improvements in the Construction of Compensation Balances of Chronometers". Innovation described as follows; "but I claim as my Invention, and as my "Improvements in Compensation Balances of Chronometers", the mode of constructing the compensation weights of chronometers, whereby they are so provided with laminae that the expansion or contraction thereof shall, by acting on a part of the compensation weights, vary the effect of such weights on the compensation balance to which they are applied." Reprint of 1856
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Specification of James Callard Davies - Clocks - No. 8515

Catalogue no: 1038
Dewey No: Subject(s): Patents
Author(s): James Callard Davies
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1840
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Paper cover fragile and torn
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Notes:
Relates to; "An Improved Clock or Timepiece". The clock described is a small protable timepiece with a duration of over one year between windings. Reprint of 1857 Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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Specification of Robert Molyneux - Chronometers - No. 8418

Catalogue no: 1037
Dewey No: Subject(s): Patents
Author(s): Robert Molyneux
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1840
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
Related titles: The Marine Chronometer by R.T,Gould, p.181 Related library records:
Notes:
Relates to; "An Improvement or Improvements to Chronometers". Describes additional compensation to balances over and above the usual bi-metallic rim Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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Specification of George Philcox - Chronometers, Watches and Other Timekeepers - No. 8145

Catalogue no: 1036
Dewey No: Subject(s): Patents
Author(s): George Philcox
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1839
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile and torn
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Notes:
Relates to; "Certain Improvements in Chronometers, Watches, and other Timekeepers". The patent describes an escapement which Philcox names the "diamond lever" consisting of the, "novel arrangement, constuction, and adaptation of peculiarly formed levers or impelling and detant pieces by means of which I construct a more simple and less expensive escapement than those in present use." Reprint of 1857
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Specification of Joseph Eden MacDowall - Escapement for Timekeepers - No. 7874

Catalogue no: 1035
Dewey No: Subject(s): Patents
Author(s): Joseph Eden MacDowall
Total pages: 6 Illustrations: 2 fold out Language(s): English Publication date: 1838
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile. Some water damage to text pages.
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Notes:
Relates to; "An Improvement in the Manufacture of Escapaments for Chronometers, Clocks, and Watches". There are 13 drawings within the two fold out pages. The patent describes an escapement axis with a complete revolution for each impulse or, modified, two impulses for one revolution of the escapement axis. The purpose is to reduce the number of teeth normally used in an escape wheel so that it can be manufactured by persons of much less skill than is required for normal escapements. Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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Specification of Edward John Massey - Chronometers and other Timekeepers - No. 7678

Catalogue no: 1034
Dewey No: Subject(s): Patents
Author(s): Edward John Massey
Total pages: 3 Illustrations: 1 fold out Language(s): English Publication date: 1838
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue cover fragile
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Notes:
Relates to; "Certain Improvements in Chronometers and other Timekeepers". Patent describes the use in chronometers of two detents on separate axles, the advantage claimed being able to use very delicate springs and of locking the pallet wheel very near the centre of the circular detent. Malcolm Gardner, Horological Bookseller sticker on front cover and first page. Malcolm Gardner, Horological Bookseller sticker on cover and first page.
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