Multi-pole, two-speed brush holder assembly

A multi-pole, multi-speed brush holder assembly comprising:

• a first speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, and a central aperture extending between said sides, a pair of brush holders disposed on said card's first side and spaced circumferentially around said aperture, electrically conductive brushes guided by said brush holders for motion radially of said aperture, spring means for urging each of said brushes radially inward toward said aperture, and an electric conductor disposed on the card's second side and electrically connecting the brush of a first of said brush holders with the brush of a second of said brush holders;
• a second speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, and a central aperture extending between said sides of said second speed brush holder assembly's brush card, a pair of brush holders disposed on the first side of said second speed brush holder assembly's brush card and spaced circumferentially around said aperture of said second speed brush holder assembly's brush card, electrically conductive brushes guided by said brush holders on said second speed brush holder assembly's brush card for motion radially of said aperture of said second speed brush holder assembly's brush card, spring means for urging each of said brushes of said second speed brush holder assembly's brush card radially inward toward said aperture of said second speed brush holder assembly's brush card, and an electric conductor disposed on the second side of said second speed brush holder assembly's brush card and electrically connecting the brush of a first of said brush holders on said second speed brush holder assembly's brush card with the brush of a second of said brush holders on said second speed brush holder assembly's brush card;
• means joining said brush cards together with said second sides of said brush cards mutually confronting and with said electric conductors mutually abutting to establish electric continuity between said electric conductors;
• and a spacer sandwiched between said first and second speed brush holder assemblies and having aperture means to allow said electric conductors to be mutually abutting to establish electric continuity between said electric conductors.

A multi-pole, two-speed brush holder assembly comprising:

• a high-speed brush holder assembly and a low-speed brush holder assembly;
• said high-speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, a plurality of brush holders disposed circumferentially spaced apart on said card's first side, a respective electrically conductive brush guided by a respective one of said brush holders and based by a spring means for said high-speed brush holder assembly in a direction of motion relative to the respective brush holder, and an electric conductor disposed on the brush card's second side and electrically connecting the brush of a first of said brush holders with the brush of a second of said brush holders;
• said low-speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, a plurality of brush holders disposed circumferentially spaced apart on the first side of said low-speed brush holder assembly's brush card, a respective electrically conductive brush guided by a respective one of said brush holders on said low-speed brush holder assembly's brush card and biased by a spring means for said low-speed brush holder assembly in a direction of motion relative to the respective brush holder on said low-speed brush holder assembly's brush card, and an electric conductor disposed on the second side of said low-speed brush holder assembly's brush card and electrically connecting the brush of a first of said brush holders on said low-speed brush holder assembly's brush card with the brush of a second of said brush holders on said low-speed brush holder assembly's brush card;
• means joining said brush cards together with said second sides of said brush cards mutually confronting and with said electric conductors mutually abutting to establish electric continuity between said electric conductors, wherein the brushes of brush holders on the high-speed brush holder assembly's brush card, other than the brushes of the first and second brush holders on the high-speed brush holder assembly's brush card, do not have electric continuity with the brushes of any brush holders on the low-speed brush holder assembly's brush card, and wherein the brushes of brush holders on the low-speed brush holder assembly's brush card, other than the brushes of the first and second brush holders on the low-speed brush holder assembly's brush card, do not have electric continuity with the brushes of any brush holders on the high-speed brush holder assembly's brush card.

A multi-pole, multi-speed brush holder assembly comprising:

• a first speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, a pair of brush holders disposed circumferentially spaced apart on said card's first side, a respective electrically conductive brush guided by a respective one of said brush holders and biased by a spring means for said first speed brush holder assembly in a direction of motion relative to the respective brush holder, and an electric conductor disposed on the brush card's second side and electrically connecting the brush of a first of said brush holders with the brush of a second of said brush holders;
• a second speed brush holder assembly comprising a non-electrically conductive brush card having two sides, namely a first side and a second side, a pair of brush holders disposed circumferentially spaced apart on the first side of said second speed brush holder assembly's brush card, a respective electrically conductive brush guided by a respective one of said brush holders on said second speed brush holder assembly's brush card and biased by a spring means for said second speed brush holder assembly in a direction of motion relative to the respective brush holder on said second speed brush holder assembly's brush card, and an electric conductor disposed on the second side of said second speed brush holder assembly's brush card and electrically connecting the brush of a first of said brush holders on said second speed brush holder assembly's brush card with the brush of a second of said brush holders on said second speed brush holder assembly's brush card;
• means joining said brush cards together with said second sides of said brush cards mutually confronting and with said electric conductors mutually abutting to establish electric continuity between said electric conductors;
• and a spacer sandwiched between said first and second speed brush holder assemblies and having aperture means to allow said electric conductors to be mutually abutting to establish electric continuity between said electric conductors.