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GB1306763A - Device for magnetically holding the escapement of a time-keeping device - Google Patents

Device for magnetically holding the escapement of a time-keeping device

Info

Publication number
GB1306763A
GB1306763A GB2357271*A GB2357271A GB1306763A GB 1306763 A GB1306763 A GB 1306763A GB 2357271 A GB2357271 A GB 2357271A GB 1306763 A GB1306763 A GB 1306763A
Authority
GB
United Kingdom
Prior art keywords
wheel
arrangement
acts
magnet
impulses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2357271*A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Junghans GmbH
Original Assignee
Gebrueder Junghans GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebrueder Junghans GmbH filed Critical Gebrueder Junghans GmbH
Publication of GB1306763A publication Critical patent/GB1306763A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C5/00—Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements
    • G04C5/005—Magnetic or electromagnetic means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1502—Escapement

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)
  • Electromagnets (AREA)
  • Transmission Devices (AREA)

Abstract

1306763 Clocks and watches JUNGHANS GmbH Gebr 19 April 1971 [17 March 1970] 23572/71 Heading G3T A device for holding an escaper or stepping wheel 19 between impulses comprises a magnet arrangement which acts upon the teeth of the wheel or on a part in engagement with the wheel and which consists of a permanent bar magnet 24 surrounded by a cylindrical magnetic field return element 25. Pallet fork 10 which cooperates with stepping wheel 19 is held between impulses in either of its extreme pivotal positions defined by pins 14, 15 by magnet arrangement 24/25. The arrangement 24/25 acts on portions 10d, 10e of the fork 10 which are separated by an air-gap and are provided with ferromagnetic layer 26. Both the bar magnet 24 and the arrangement 24/25 are axially movable to adjust the holding force. The bar magnet may be of platinum cobalt alloy and the element 25 of soft iron. The pallet fork 10 is pivotally mounted on back plate 11 by staff 16 and receives impulses from a balance via a pin engaged in notch 13. The stepping wheel is mounted on an arbor 27 which also carries a ratchet wheel 20 engaged by a lock spring 22. In an alternative embodiment, Fig.3 (not shown), the magnet arrangement (34/35) acts upon the teeth (33a) of a ratchet wheel (3) which is of ferromagnetic material.
GB2357271*A 1970-03-17 1971-04-19 Device for magnetically holding the escapement of a time-keeping device Expired GB1306763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7009864U DE7009864U (en) 1970-03-17 1970-03-17 DEVICE FOR MAGNETIC LOCKING OF A ROTATING WHEEL OF A TIME HOLDING DEVICE.

Publications (1)

Publication Number Publication Date
GB1306763A true GB1306763A (en) 1973-02-14

Family

ID=6610249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2357271*A Expired GB1306763A (en) 1970-03-17 1971-04-19 Device for magnetically holding the escapement of a time-keeping device

Country Status (7)

Country Link
US (1) US3673792A (en)
JP (1) JPS4926914B1 (en)
AT (1) AT313180B (en)
CH (2) CH566035A (en)
DE (1) DE7009864U (en)
FR (1) FR2083352B3 (en)
GB (1) GB1306763A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50152066U (en) * 1974-06-03 1975-12-17
GB0521765D0 (en) * 2005-10-25 2005-11-30 Fromanteel Ltd Clock
DE102006030793A1 (en) * 2006-06-30 2008-01-03 Zf Friedrichshafen Ag Switching device for a manual transmission
EP3299907A1 (en) * 2013-12-23 2018-03-28 ETA SA Manufacture Horlogère Suisse Mechanical clock movement with magnetic escapement
US9772604B2 (en) * 2013-12-23 2017-09-26 Eta Sa Manufacture Horlogere Suisse Timepiece synchronization mechanism
EP3627242B1 (en) 2018-09-19 2021-07-21 The Swatch Group Research and Development Ltd Optimised magneto-mechanical timepiece escapement mechanism
EP3757684B1 (en) 2019-06-26 2024-10-16 The Swatch Group Research and Development Ltd Inertial mobile for timepiece resonator with device for magnetic interaction insensitive to external magnetic field
EP3882713B1 (en) * 2020-03-18 2022-09-21 The Swatch Group Research and Development Ltd Timepiece movement comprising an escapement provided with a magnetic system

Also Published As

Publication number Publication date
US3673792A (en) 1972-07-04
FR2083352A3 (en) 1971-12-17
FR2083352B3 (en) 1973-12-28
CH566035A (en) 1975-08-29
CH326871A4 (en) 1973-05-30
AT313180B (en) 1974-02-11
JPS4926914B1 (en) 1974-07-12
DE7009864U (en) 1970-11-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee