Image:Longcase clock movement.png

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[edit] Summary

Description

Woodcut of cross section of English longcase (grandfather) clock movement from the mid-1800s. It is described as: "The going part of a common regulator, or house-clock of superior character... The movement is that found in long-cased hall clocks..." This is a weight driven, pendulum clock with a one second (1 meter) pendulum, anchor or deadbeat escapement, second hand, and no striking mechanism. Drawing also appears in Paul Nooncree Hasluck (1889) The Clock Jobber's Handybook, Crosby, Lockwood & Son, London, p.63, fig.14 with more information in text. Alterations: removed figure number. Labeled parts are identified in the text as:
(A) escapement pallet
(a) escapement arbor
(C) center wheel
(c) center wheel pinion
(D) second wheel
(d) second wheel pinion
(E) scape wheel
(e) scape wheel pinion
(F) crutch
(f) fork
(G) great wheel
(H) hour wheel
(K) square winding arbor
(L) bridge
(M) minute wheel
(P) pendulum
(Q) pendulum support
(R),(r) maintaining power ratchets
(S) pendulum suspension spring
(X) lower pillar
(Y) snail (only used in striking clocks)
(Z) top pillar
Source

Downloaded 2007-12-1 from Edmund Beckett Grimsthorpe (1874) A Rudimentary Treatise on Clocks, Watches and Bells, Lockwood & Co., London, UK, p.129, fig.25 on Google Books.
Date

1874
Author

Edmund Beckett (Lord) Grimsthorpe
Permission
(Reusing this image)

Public domain - Beckett died 1905

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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File history

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Date/TimeDimensionsUserComment
current16:19, 19 January 2008849×1,422 (194 KB)Chetvorno ({{Information |Description=Woodcut of English longcase (grandfather) clock movement from the mid-1800s. This is a section through the center of the clock. |Source=Downloaded 2007-12-1 from [http://books.google.com/books?id=UnsDAAAAYAAJ&pg=PA63 Paul Noon)
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