GB828418A - Improvements in or relating to clockwork springs - Google Patents

Improvements in or relating to clockwork springs

Info

Publication number
GB828418A
GB828418A GB22972/58A GB2297258A GB828418A GB 828418 A GB828418 A GB 828418A GB 22972/58 A GB22972/58 A GB 22972/58A GB 2297258 A GB2297258 A GB 2297258A GB 828418 A GB828418 A GB 828418A
Authority
GB
United Kingdom
Prior art keywords
strip
austenite
martensite
temperature
bainite
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
GB22972/58A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB828418A publication Critical patent/GB828418A/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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • G04B1/145—Composition and manufacture of the springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G1/00—Spring motors
    • F03G1/02—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

828,418. Making springs; working at specified temperatures to alter physical structure. PHILIPS GLOEILAMPENFABRIEKEN N.V. July 17, 1958 [July 20, 1957], No. 22972/58. Classes 83 (2) and 83 (4). A method of making clockwork springs for miniature watches from a rolled strip of hardenable steel having a carbon content of at least 0.4% comprises heating the strip until it consists of at least 80% of austenite, cooling to the recrystallization temperature, the strip still consisting of 80% austenite, rapidly deforming the cooled strip to at least 80% reduction in a temperature range between the recrystallization temperature and 10‹ C. below the temperature at which the martensite formation begins but above 100‹ C., the deformed austenite being subsequently converted into bainite or martensite. During cooling the strip may be simultaneously deformed if desired. The rapid deformation prevents the austenite from changing into bainite or martensite during deformation of the strip. Specification 744,140 is referred to.
GB22972/58A 1957-07-20 1958-07-17 Improvements in or relating to clockwork springs Expired GB828418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL828418X 1957-07-20

Publications (1)

Publication Number Publication Date
GB828418A true GB828418A (en) 1960-02-17

Family

ID=19841127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22972/58A Expired GB828418A (en) 1957-07-20 1958-07-17 Improvements in or relating to clockwork springs

Country Status (1)

Country Link
GB (1) GB828418A (en)

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