GB263287A - Improvements in or relating to ignition magnetos for internal combustion engines - Google Patents
Improvements in or relating to ignition magnetos for internal combustion enginesInfo
- Publication number
- GB263287A GB263287A GB3098425A GB3098425A GB263287A GB 263287 A GB263287 A GB 263287A GB 3098425 A GB3098425 A GB 3098425A GB 3098425 A GB3098425 A GB 3098425A GB 263287 A GB263287 A GB 263287A
- Authority
- GB
- United Kingdom
- Prior art keywords
- poles
- armature
- pole
- magnet
- degrees
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/18—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having horse-shoe armature cores
- H02K21/185—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having horse-shoe armature cores with the axis of the rotor perpendicular to the plane of the armature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
263,287. British Lighting & Ignition Co., Ltd., and Hutton, J. C. Dec. 8, 1925. Magneto-electric machines.-To obtain four or more sparks per revolution in a rotating-magnet fixed-armature magneto, such as described in Specifications 184,905, and 185,192, a set of two or more pole-pieces is fixed at each end of the armature core, the pieces at one end being displaced with regard to those at the other end in the axial direction of the machine. Fig. 1 shows a machine with a bipolar magnet giving four sparks per revolution and Fig. 2 shows an end view of the armature and pole-pieces. The limbs b, c of the armature respectively have pairs of pole-pieces d, e and h, g 180 degrees apart and are bent in opposite directions at the two ends of the armature so that the poles are separated axially by a distance k. The poles g, e are separated by gap circumferentially without overlapping, whereas the poles d, h overlap. In the position shown, flux passes from the magnet pole N through the pole d, limb b, core a, limb c, as shown in dotted lines, to the pole and magnet pole S. As the magnet rotates and its poles come successively opposite the armature poles in the order h, e; e, g; g, d the flux through the core a is successively reversed, thus giving four spares during the revolution. The overlapping poles may alternatively be on the underside of the rotor instead of above it as shown. Also, a fourpole rotary magnet may be employed, with poles of alternate sign, in which case the flux breaks occur at each of the four armature pole-pieces. Fig. 7 shows a form for giving six sparks per revolution of a bipolar magnet having six polar surfaces N, S. The axially displaced pairs of armature poles d, e, g, h are spaced at 120 degrees. In an alternative six-spark form, each end of the armature core has three poles symmetrically spaced at 120 degrees and co-operating with a magnet having two, four or six poles spaced apart by 60 degrees. Other numbers of sparks per revolution may be obtained by increasing the number of poles on the rotor or armature core or both and modifying their angular spacing. for examples, 45 degrees for eight sparks or 36 degrees for ten sparks. Specification 263,286 also is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3098425A GB263287A (en) | 1925-12-08 | 1925-12-08 | Improvements in or relating to ignition magnetos for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3098425A GB263287A (en) | 1925-12-08 | 1925-12-08 | Improvements in or relating to ignition magnetos for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB263287A true GB263287A (en) | 1926-12-30 |
Family
ID=10316159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3098425A Expired GB263287A (en) | 1925-12-08 | 1925-12-08 | Improvements in or relating to ignition magnetos for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB263287A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922903A (en) * | 1956-09-11 | 1960-01-26 | Bendix Aviat Corp | Ignition apparatus |
FR2679714A1 (en) * | 1991-07-22 | 1993-01-29 | Ebauchesfabrik Eta Ag | ELECTROMAGNETIC TRANSDUCER POLYPHASE WITH PERMANENT MAGNET, PARTICULARLY DRIVE MOTOR. |
-
1925
- 1925-12-08 GB GB3098425A patent/GB263287A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922903A (en) * | 1956-09-11 | 1960-01-26 | Bendix Aviat Corp | Ignition apparatus |
FR2679714A1 (en) * | 1991-07-22 | 1993-01-29 | Ebauchesfabrik Eta Ag | ELECTROMAGNETIC TRANSDUCER POLYPHASE WITH PERMANENT MAGNET, PARTICULARLY DRIVE MOTOR. |
EP0525462A1 (en) * | 1991-07-22 | 1993-02-03 | Eta SA Fabriques d'Ebauches | Multi-phase electromagnetic transducer with permanent magnet, in particular driving motor |
US5289071A (en) * | 1991-07-22 | 1994-02-22 | Eta Sa Fabriques D'ebauches | Polyphase electromagetic transducer with a permanent magnet, in particular a drive motor |
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