GB1208531A - Hairspring - Google Patents

Hairspring

Info

Publication number
GB1208531A
GB1208531A GB1489069A GB1489069A GB1208531A GB 1208531 A GB1208531 A GB 1208531A GB 1489069 A GB1489069 A GB 1489069A GB 1489069 A GB1489069 A GB 1489069A GB 1208531 A GB1208531 A GB 1208531A
Authority
GB
United Kingdom
Prior art keywords
hairspring
centre
march
innermost turn
balance
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
GB1489069A
Inventor
Louis William Berthoud
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1208531A publication Critical patent/GB1208531A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring

Abstract

1,208,531. Hairsprings. L. W. BERTHOUD. 21 March, 1969 [25 March, 1968], No. 14890/69. Heading F2S. [Also in Division G3] A hairspring for the balance of a watch has its innermost turn formed as a closed circular loop. The hairspring is fixed directly or by the intermediary of a collet to the balance staff, the fixing being effected by sticking, crimping or soldering. The centre of the innermost turn may coincide with the centre of gravity or the geometric centre of the hairspring.
GB1489069A 1968-03-25 1969-03-21 Hairspring Expired GB1208531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH438468A CH524170A (en) 1968-03-25 1968-03-25 Spiral spring for timepiece

Publications (1)

Publication Number Publication Date
GB1208531A true GB1208531A (en) 1970-10-14

Family

ID=4275101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1489069A Expired GB1208531A (en) 1968-03-25 1969-03-21 Hairspring

Country Status (4)

Country Link
CH (2) CH524170A (en)
DE (2) DE6911713U (en)
FR (1) FR2004631A1 (en)
GB (1) GB1208531A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302821A2 (en) * 2001-10-10 2003-04-16 Franck Muller-Watchland SA Balance-spring for time measuring apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005051710A1 (en) * 2005-10-28 2007-05-03 Moenus Textilmaschinen Gmbh Damper for plunger, e.g. for the operating plunger on a textile bobbin carrier disk brake, involves a closed air chamber with a restricted vent passage
DE102007012850B3 (en) * 2007-03-17 2008-10-09 Carl Freudenberg Kg Closed residual pressure retaining valve for pneumatic spring strut of motor vehicle, has base body with central drilling by which valve shaft is guided, and valve plug locking opening of central drilling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302821A2 (en) * 2001-10-10 2003-04-16 Franck Muller-Watchland SA Balance-spring for time measuring apparatus
EP1302821A3 (en) * 2001-10-10 2010-05-05 Franck Muller-Watchland SA Balance-spring for time measuring apparatus

Also Published As

Publication number Publication date
DE6911713U (en) 1971-12-30
CH524170A (en) 1970-12-31
CH438468A4 (en) 1970-12-31
DE1914836A1 (en) 1970-07-02
FR2004631A1 (en) 1969-11-28

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees