US1838150A

US1838150A - Method of fitting and winding coils on pole armatures or field magnets

Info

Publication number: US1838150A
Application number: US485163A
Authority: US
Inventors: Papst Hermann
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-10-06
Filing date: 1930-09-29
Publication date: 1931-12-29
Anticipated expiration: 1948-12-29
Also published as: FR703276A; GB346248A; DE559844C

Description

29,1931. PAPST 1,838,150

Filed sept. 29,' 195o III IH HNI Patented Dec. 29., 1931 UNITED STATES PATENT i OFFICE HERMANN PAPST, F ST. GEORGEN, rSCHWIRZWALD, GERMANY METHOD OF FITTING' .AND WINDIN G- COILS ON'.POLE-A131111:.ATUIRES` 0R FIELD* MAGNETS Application led September 29, 1930, Serial No. 485,163, and in Germany October 5, 1929.

The invention relates to a method for litting and winding coils on pole-armatures or field magnets for electrical machines, wherein the pole pieces are formed integral with the i core and, in order to obtain a field with a larger cross-section, are made to extend back to approximately the centre of same and over the coils, i. e. the pole pieces are cut away on the inside to accommodate the coils.

le Armatures or field magnets of this kind are used especially for small motors where it is essential for the cost of manufacture to be kept down to a minimum. Hitherto it has only been possible to fit these coils on armatures with cut-away pole pieces, by having one head of the core made removable. This involves an appreciable increase in cost and a more complicated design, which is particularly troublesome where the iron core coni sists of sheet ironlayers, such as dynamo sheets.

According to this invention this drawback is obviated and the stamping ofthe sheets of which the armature is to be formed out of a single piece for the entire section of the form desired is rendered possible by having the ends of the pole-pieces separated by a space somewhat larger than the width of the bobbins of the coils, and by having the bobbins divided ory formed in two parts. In assembling, the two halves of one bobbin are held together about the middle of the iron core and wound with the coil wire. When the first coil is finished, the bobbin, the two parts of which are now held together by the winding, is pushed laterally into its final position against the inner face of the pole piece, and the two halves of the second bobbin are then placed in position on the core and wound in a similar M manner. 'Vhen the second coil is finished,

this also is pushed over laterally into its finaly position against the inner face of the other pole piece. The coils are retained in their working positions by means of a suitable intermediate member.

In the accompanying drawings which illustrate diagrammatically one embodiment of this invention Figure 1 illustrates a fullyvwound field magnet core or armature for an electric machine. A

Figure 2 illustrates the winding of the first bobbin. J A Figure 3 the winding ofthe second bobbin, and 1 Y l 1 f Figure 4 one half of a bobbin in perspective. l

The armature or field magnet consists of the

pole pieces

1 and 2 formed integrally with ancore 3 and the tips of the pole pieces extend backwards towards the centre so that the diS- tance aibetween the ends b of the pole pieces is somewhat greater than the width c of the bobbins l and 5, so that the latter, made up of two parts, can be placed on the core 3.

When winding, the two parts of the bobbin 4 are placed on the core 3 in the position shown in Figure Qand the wire wound thereon. When this coil is finished it is pushed to the left againstfthe inner face of the pole piece 1 and the two parts of the bobbin 5. are then placed in the mid-position as shown in Figuref). This coil, having been fully wound, isfpushed'laterally to the right against the inside face of the pole piece 2 and a distance piece 6 is placed between the two bobbins and secured in position by a screw 8 or other convenient means.

1. The method of fitting and winding coils on pole armatures in which the pole pieces are integral with the core, the tips of said pole pieces being extended backwards towards the centre thereof the wound bobbins being accommodated adjacent the inner faces of the pole pieces, means being provided for retaining the respective bobbins in the latter position, which consists in placing the bobbins, formed in two parts, in mid-position on the core for winding after which operation the Wound bobbins are moved laterally to each end of the core against the inner faces of the pole pieces, and finally securing the retaining means in position.

2. The method of fitting and winding coils on pole armatures in which the pole pieces are integral with the core, the tips of said pole pieces being extended backwards towards the centre thereof the wound bobbins being acim commodated adjacent the inner faces of the pole pieces7 means being provided for retaining the respective bobbins in the latter position, Which consists in placing a two-part r bobbin for one coil on the core and Winding same While in mid-position thereonthe Wound bobbin being subsequently moved laterally on the core to a position adjacent one pole piece after which operation a two-part bobbin for a 10 second coil is similarly placed in the midepo* sition, Wound and moved laterally into p0sition adjacent the opposite pole piece and finally securing the retaining means in p0sition.

15 3. The method o fitting and Winding coils on pole armatures in Which the pole pieces are integral with the core7 the tips of said pole pieces being extended backwards towards the centre so as to be separated by a 2a space somewhat greater than the Width of the bobbins, the Wound bobbins being accommodated adjacent the inner faces of the pole pieces, means being provided for retaining the respective bobbins in the latter position,

25 which consists in placing two-part bobbins singly in mid-position on the core, Winding the coils thereon, moving the wound bobbins laterally to a position adjacent the respective pole pieces and .finally securing the retaining 3o means in position.

4. An armature for an electric machine comprising oppositcly disposed pole pieces and a straight core formed integral therewith the tips of the pole pieces being extended 35, backwards towards the centre of the core, a two-part coil Wound bobbin arranged on said core adjacent each pole piece and detachable means secured to the core for retaining said bobbins in their respective positions.

40 HERMANN PAPST.