Electric brake actuating mechanism

Claim 1

AN ELECTRIC BRAKE ASSEMBLY OPERABLE WITH A BRAKE DRUM ROTATABLE ABOUT A CENTRAL AXIS COMPRISING A PAIR OF BRAKE SHOES EACH HAVING AN ARCUATELY SHAPED LINING BEARING PORTION AND AN UPRIGHT WEB PORTION SECURED TO SAID LINING BEARING PORTION, A BRAKE BACKUP PLATE, MEANS FOR SECURING SAID BRAKE SHOES TO SAID BRAKE BACKUP PLATE AND FOR MAINTAINING SAID BRAKE SHOES NORMALLY OUT OF ENGAGEMENT WITH THE BRAKE DRUM, ELECTRICALLY ACTUABLE MEANS FOR MOVING SAID BRAKE SHOES INTO ENGAGEMENT WITH SAID BRAKE DRUM, SAID ELECTRICALLY ACTUABLE MEANS INCLUDING A GENERALLY FLAT LEVER ARM AXIALLY DISPOSED BETWEEN SAID WEB PORTION OF ONE OF SAID SHOES AND SAID BRAKE BACKUP PLATE, MEANS PIVOTALLY SECURING ONE END OF SAID LEVER ARM AT A PIVOT LOCATION TO SAID BRAKE BACKUP PLATE AT A PIVOTAL AXIS ECCENTRIC TO THE CENTRAL AXIS AND PROXIMATE TO CONFRONTING ENDS OF SAID BRAKE SHOES, SAID LEVER ARM BEING GENERALLY ARCUATELY SHAPED WITH ITS OPPOSITE END NORMALLY BEING LOCATED SUBSTANTIALLY DIAMETRICALLY FROM SAID ONE END RELATIVE TO THE CENTRAL AXIS AND WITH A PORTION OF SAID LEVER ARM PROXIMATE SAID PIVOT LOCATION AT SAID ONE END NORMALLY BEING IN AXIAL OVERLAPPING RELATION RELATIVE TO SAID WEB PORTION OF SAID ONE OF SAID SHOES, ELECTROMAGNET ASSEMBLY MEANS SECURED TO SAID LEVER ARM AT SAID OPPOSITE END AND ACTUABLE FOR CAUSING PIVOTING OF SAID LEVER ARM ABOUT SAID PIVOTAL AXIS IN OPPOSITE DIRECTIONS FROM ITS NORMAL POSITION IN ACCORDANCE WITH THE DIRECTION OF ROTATION OF SAID BRAKE DRUM AND FOR MOVING SAID LEVER ARM SUBSTANTIALLY OUT OF OVERLAPPING RELATIONSHIP RELATIVE TO SAID WEB OF SAID ONE OF SAID BRAKE SHOES RESPONSIVELY TO