GB828418A - Improvements in or relating to clockwork springs - Google Patents
Improvements in or relating to clockwork springsInfo
- 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
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.
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) |
-
1958
- 1958-07-17 GB GB22972/58A patent/GB828418A/en not_active Expired
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