DETENT ESCAPEMENT AND MECHANICAL CLOCK

Title:

DETENT ESCAPEMENT AND MECHANICAL CLOCK

Document Type and Number:

WIPO Patent Application WO/2011/111250

Kind Code:

A1

Abstract:

Disclosed is a detent escapement (100), comprised of an escape wheel (110), a balance wheel (120) provided with an impulse pallet (122) and an unlocking jewel (124), and a blade (130) provided with a locking jewel (132). With the balance wheel situated at the centre of oscillation, a straight line drawn starting at the centre of rotation thereof and passing through the centre of rotation of the blade forms a rotation reference line. In order to balance the sum total of: the effect on the rotational movement of the balance wheel caused by 'impulse before dead centre', and the effect on the rotational movement of the balance wheel caused by 'resistance after dead centre', which together comprise the total effect causing the clock to advance; and the sum total of the effect on the rotational movement of the balance wheel caused by 'resistance before dead centre', and the effect on the rotational movement of the balance wheel caused by 'impulse after dead centre', which together comprise the total effect causing the clock to slow; the unlocking jewel is aligned with the rotation base point line and fixed at a position facing towards the direction farthest from the escape wheel.

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Inventors:

KODA, Masayuki (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)
幸田　雅行 (〒07 千葉県千葉市美浜区中瀬１丁目８番地　セイコーインスツル株式会社内 Chiba, 〒2618507, JP)
UCHIYAMA, Hiroki (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)

Application Number:

JP2010/064819

Publication Date:

September 15, 2011

Filing Date:

August 31, 2010

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Assignee:

SEIKO INSTRUMENTS INC. (8 Nakase 1-chome, Mihama-ku Chiba-sh, Chiba 07, 〒2618507, JP)
セイコーインスツル株式会社 (〒07 千葉県千葉市美浜区中瀬１丁目８番地 Chiba, 〒2618507, JP)
KODA, Masayuki (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)
幸田　雅行 (〒07 千葉県千葉市美浜区中瀬１丁目８番地　セイコーインスツル株式会社内 Chiba, 〒2618507, JP)

International Classes:

G04B15/14; G04B17/06; G04B18/02

Attorney, Agent or Firm:

KUHARA, Kentaro et al. (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)

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