GB660581A - Improvements in or relating to escapement mechanism - Google Patents
Improvements in or relating to escapement mechanismInfo
- Publication number
- GB660581A GB660581A GB1566848A GB1566848A GB660581A GB 660581 A GB660581 A GB 660581A GB 1566848 A GB1566848 A GB 1566848A GB 1566848 A GB1566848 A GB 1566848A GB 660581 A GB660581 A GB 660581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- oscillator
- magnet
- shaped
- centre
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
660,581. Clocks and watches. CLIFFORD, C. F., and HORSTMANN CLIFFORD MAGNETICS, Ltd. May 23, 1949 [June 10, 1948], No. 15668/48. Class 139 In a magnetic escapement the timekeeping oscillator comprises a magnet or keeper carried by a spring which is attached to a support approximately at the centre of gravity of the oscillatory system or approximately on an axis that passes through the centre of gravity. The invention is an improvement in the magnetic escapement disclosed in Specification 596,216 which is referred to. In the first embodiment, Fig. 1, the timekeeping oscillator comprises a U-shaped magnet 1 having poles 5 which embrace an escapement wheel 3 and a plate spring 2 to which the magnet is attached. The escape wheel 3 has a permeable magnetic rim 7 with magnetic extensions 8, 9. The spring 2 is clamped by an eccentric disc 12a to a support 6 positioned at the centre of gravity of the oscillator or positioned so that the axis about which the timekeeping oscillator oscillates passes through the centre of gravity of the oscillator. The disc 12a may be rotated to alter the effective length of the spring 2 and so vary the frequency of oscillation of the oscillator. In three other embodiments the plate spring is E- shaped, in the first, Fig. 2 (not shown), the middle leg of the spring is attached to the support and the tips of the outer legs carry keepers the outer ends of which are positioned close to the poles of a permanent magnet. In the second embodiment using an E-shaped plate spring, Fig. 3 (not shown), the two outer legs of the spring are attached to a support and the central leg carries a permanent magnet which cooperates with two axially aligned escape wheels. In the third embodiment using an E-shaped plate spring, Fig. 4 (not shown), the central leg of the spring carries a permanent magnet which co-operates with a cylindrical form of escape wheel. In another embodiment, Fig. 6, the magnet 1 is U-shaped and the spring 2 has a wave form so that the oscillator reciprocates in a vertical plane. In another embodiment, Fig. 5, the spring 2 is E-shaped and the magnet 1 is semi-circular. The timekeeping oscillator in this case is subject to torsional vibrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1566848A GB660581A (en) | 1948-06-10 | 1948-06-10 | Improvements in or relating to escapement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1566848A GB660581A (en) | 1948-06-10 | 1948-06-10 | Improvements in or relating to escapement mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB660581A true GB660581A (en) | 1951-11-07 |
Family
ID=10063278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1566848A Expired GB660581A (en) | 1948-06-10 | 1948-06-10 | Improvements in or relating to escapement mechanism |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB660581A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1106258B (en) * | 1956-01-24 | 1961-05-04 | E H Helmut Junghans Dr Ing | Magnet escapement |
| DE1274038B (en) * | 1962-07-12 | 1968-07-25 | Nihon Denki Tokei Co Ltd | Tuning fork watch |
| US3485032A (en) * | 1967-03-08 | 1969-12-23 | Jeco Kk | Tuning fork assembly for use with rotary timepiece movement |
| EP2466401A1 (en) | 2010-12-15 | 2012-06-20 | Asgalium Unitec SA | Magnetic resonator for mechanical timepiece |
-
1948
- 1948-06-10 GB GB1566848A patent/GB660581A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1106258B (en) * | 1956-01-24 | 1961-05-04 | E H Helmut Junghans Dr Ing | Magnet escapement |
| DE1274038B (en) * | 1962-07-12 | 1968-07-25 | Nihon Denki Tokei Co Ltd | Tuning fork watch |
| US3485032A (en) * | 1967-03-08 | 1969-12-23 | Jeco Kk | Tuning fork assembly for use with rotary timepiece movement |
| EP2466401A1 (en) | 2010-12-15 | 2012-06-20 | Asgalium Unitec SA | Magnetic resonator for mechanical timepiece |
| WO2012080413A1 (en) | 2010-12-15 | 2012-06-21 | Asgalium Unitec Sa | Magnetic resonator for a mechanical timepiece |
| US8794823B2 (en) | 2010-12-15 | 2014-08-05 | Asgalium Unitec Sa | Magnetic resonator for a mechanical timepiece |
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