George Philcox

Specification of George Philcox - Marine and Pocket Chronometers - No. 674

Catalogue no: 1056
Dewey No: Subject(s): Patents
Author(s): George Philcox
Total pages: 2 Illustrations: 1 fold out Language(s): English Publication date: 1857
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover frayed and dog eared
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Notes:
Relates to; "Improvements in Marine and Pocket Chronometers and other Timekeepers". The patent describes a particular train of wheels for a two day marine chronometer and a one day pocket chronometer as well as a novel way of setting the hands without opening the case
Room location: Library Cabinet: Q Shelf: 4
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Specification of George Philcox - Marine Chronometers and other Time-Keepers - No. 730

Catalogue no: 1053
Dewey No: Subject(s): Patents
Author(s): George Philcox
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1852
Editor: Publisher: The Queen's Printing Office
Dimensions: 290mm x 200mm Condition: Blue covers fragile and torn
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Notes:
Relates to; "Improvements in Marine Chronometers and other Time Keepers". The patent describes six innovations as follows; 1. The impulse or method of giving and receiving the blow 2. The peculiar train adapted for my escapement in obtaining half seconds with the fifth wheel 3. A new application or construction of the balance 4. The method of jewelling the staff with a solid ruby or other stone instead of a hollow roller as now used 5. The application of the double convelute springs 6. The application of the compensating properties as applied to the pendulum Reprint of 1854
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Specification of George Philcox - Chronometers and other Timekeepers - No. 11,177

Catalogue no: 1046
Dewey No: Subject(s): Patents
Author(s): George Philcox
Total pages: 3 Illustrations: 1 fold out Language(s): English Publication date: 1846
Editor: Publisher: The Great Seal Patenet Office
Dimensions: 290mm x 200mm Condition: Blue paper cover missing
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Notes:
Relates to; "Improvements in the Construction of Chronometers and other Timekeepers". Patent describes the use of two balance springs, either helical or spiral, on a single balance wheel, so arranged that when one balance spring is fully opened, the other is fully closed, "by which means I am enabled to neutralize the error of a chronometer spring when acted upon by variations of temparature".
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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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