Connection of motor brush holder to stator coil

Claim 2

An electric motor comprising: a wound rotor including an armature, a shaft defining a rotational axis for said rotor, and a commutator in a circuit with said armature for connecting the latter to a motor energizing source; a stator including magnetic core means having an opening wherein said armature is rotationally disposed, and stator winding means coupled to said core means to generate magnetic flux in said core means, which flux interacts with electric current flowing in said armature to rotate said rotor about said axis; brush means connected in circuit between said commutator and a motor energizing source, frame means on which said rotor is operatively mounted for rotation about said axis, and support means operatively mounting said brush means to said frame means; said brush means comprising first and second sections each including a conducting tube, a brush conductively connected with said tube and having a radially outer end disposed within said tube and a radially inner end biased into engagement with said commutator; a conductor tab on each of said tubes, and each of said tabs having a slit with an open end disposed at an edge of said tab; said stator winding means comprising multiple turns of wire coated with insulation; said wire having first and second end portions disposed within the slits of the respective first and second sections in direct contact with first and second confronting longitudinal boundary edges defining each of said slits, to electrically connect the first and second end portions with the terminal tabs of the respective first and second sections; for each of said sections of said brush means said slit thereof extends generally radially and the open end thereof is radially inward.

Claim 3

An electric motor as set forth in claim 1 in which for each of said sections of said means said boundary edges clamp said wire therebetween, having pierced the insulation subsequent to entry of said wire into said slit through its open end.

Claim 4

An electric motor as set forth in claim 2 in which for each of said sections of said brush means said wire has been partially flattened by entry thereof into said slit.

Claim 5

An electric motor as set forth in claim 1 also comprising first and second formations on said frame means to operatively position the respective first and second end portions of said wire for entry into the slits of the respective first and second sections of said brush means as the latter are guided by said support means for radially inward movement to their operating positions.

Claim 6

An electric motor as set forth in claim 4 in which for each of said sections of said brush means the tube is constructed of conducting sheet material and the tab is formed integrally with the tube.

Claim 7

An electric motor as set forth in claim 1 in which for each of said sections of said brush means the tab is in a plane that protrudes from a side of the tube and is parallel to the direction of movement for said tube as the latter is guided by said support means for radially inward movement to its operating position.

Claim 8

An electric motor as set forth in claim 6 in which said plane is generally perpendicular to said rotational axis.

Claim 9

An electric motor as set forth in claim 6 in which the first and second portions of the wire extend generally parallel to said axis and extend alongside a side of said tube having the tab projecting therefrom.

Claim 10

An electric motor comprising: a wound rotor including an armature, a shaft defining a rotational axis for said rotor, and a commutator in a circuit with said armature for connecting the latter to a motor energizing souce; a stator including magnetic core means having an opening wherein said armature is rotationally disposed, and stator winding means coupled to said core means to generate magnetic flux in said core means, which flux interacts with electric current flowing in said armature to rotate said rotor about said axis; brush means connected in circuit between said commutator and a motor energizing source, frame means on which said rotor is operatively mounted for rotation about said axis, and support means operatively mounting said brush means to said frame means; said brush means comprising first and second sections each including a conducting tube, a brush conductively connected with said tube and having a radially outer end disposed within said tube and a radially inner end biased into engagement with said commutator; a conductor tab on each of said tubes, and each of said tabs having a slit with an open end disposed at an edge of said tab; said stator winding meand comprising multiple turns of wire coated with insulation; said wire having first and second end portions disposed within the slits of the respective first and second sections in direct contact with first and second confronting longitudinal boundary edges defining each of said slits, to electrically connect the first and second end portions with the terminal tabs of the respective first and second sections; first and second formations on said frame means to operatively position the respective first and second end portions of said wire for entry into the slits of the respective first and second sections of said brush means as the latter are guided by said support means for radially inward movement to their operating positions; for each of said sections of said brush means said tube being constructed of conducting sheet material and the tab being formed integrally with the tube; for each of said sections of said brush means said tab being in a plane that protrudes from a side of the tube and being parallel to the direction of movement for said tube as the latter is guided by said support means for radially inward movement to its operating position.

Claim 11

An electric motor comprising: a wound rotor including an armature, a shaft defining a rotational axis for said rotor, and a commutator in a circuit with said armature for connecting the latter to a motor energizing souce; a stator including magnetic core means having an opening wherein said armature is rotationally disposed, and stator winding means coupled to said core means to generate magnetic flux in said core means, which flux interacts with electric current flowing in said armature to rotate said rotor about said axis; brush means connected in circuit between said commutator and a motor energizing source, frame means on which said rotor is operatively mounted for rotation about said axis, and support means operatively mounting said brush means to said frame means; said brush means comprising first and second sections each including a conducting tube, a brush conductively connected with said tube and having a radially outer end disposed within said tube and a radially inner end biased into engagement with said commutator; a conductor tab on each of said tubes, and each of said tabs having a slit with an open end disposed at an edge of said tab; said stator winding meand comprising multiple turns of wire coated with insulation; said wire having first and second end portions disposed within the slits of the respective first and second sections in direct contact with first and second confronting longitudinal boundary edges defining each of said slits, to electrically connect the first and second end portions with the terminal tabs of the respective first and second sections; first and second formations on said frame means to operatively position the respective first and second end portions of said wire for entry into the slits of the respective first and second sections of said brush means as the latter are guided by said support means for radially inward movement to their operating positions; for each of said sections of said brush means said tube being constructed of conducting sheet material and the tab being formed integrally with the tube; for each of said sections of said brush means said tab being in a plane that protrudes from a side of the tube and being parallel to the direction of movement for said tube as the latter is guided by said support means for radially inward movement to its operating position.

Claim 12

An electric motor as set forth in claim 9 in which said plane is generally perpendicular to said rotational axis.

Claim 13

An electric motor as set forth in claim 9 in which the first and second portions of the wire extend generally parallel to said axis and extend alongside a side of said tube having the tab projecting therefrom.