Motor starting and automatic reversing switch

A switch for starting and automatically reversing a single phase induction motor comprised of a rotor shaft, starting and running windings, and a rotating actuator member that shifts to one position in response to the rotor shaft rotating at or near rated speed and shifts to another position in response to said shaft speed decreasing to below a predetermined speed or decreasing to a stop, said switch comprising:

• a base member comprised of insulating material and having opposite surfaces,
• two pairs of switch blades with two deflectable blades in each pair mounted to said base member, the two blades in each pair having a space between them and being deflectable alternately in opposite directions,
• relatively stationary contact members for cooperating with said blades and mounted to said base member in spaced relation with said deflectable blades when said switch is unoperated,
• a switch operator including a shaft supported from said base member for turning, said shaft being disposed between the two blades in each pair and having one blade deflecting arm extending radially in one direction and located between the deflectable blades in one pair and having another blade deflecting arm extending radially in the opposite direction and located between the deflectable blades in the other pair, said shaft having a neutral position wherein neither arm deflects a blade and said shaft having means for being engaged by said actuator member when rotation of said member has decreased to below said predetermined speed to turn said switch operator shaft in a direction depending on the direction in which said actuator member was rotating so that one arm will turn in a direction to deflect one switch blade in one direction into contact with a cooperating stationary contact and the other arm will turn in the opposite direction to deflect an opposite blade in the other pair of deflectable blades into contact with a cooperating contact to complete a circuit through the deflected blades and said starting winding,
• means for connecting one side of the electric power mains in common to one pair of deflectable blades and one end of said running winding and for connecting the other side of said electric power mains in common to the other pair of deflectable blades and the other end of said running winding, and
• means for connecting in common two of said stationary contact members that cooperate with a corresponding blade in each pair to one end of said starting winding and for connecting in common two of said stationary contact members that cooperate with the other corresponding blades in each pair to the other end of said starting winding.

A switch for starting and automatically reversing a single phase motor comprised of a rotor shaft, starting and running windings, and an actuator member movable under the influence of centrifugal force that depends on the rotational speed of the shaft, said switch comprising:

• a base member having nominally top and bottom surfaces,
• a first pair of deflectable switch blades, one nominally top blade in said pair being mounted to said base member for being deflected away from said top surface and the other nominally bottom blade being mounted to said member for being deflected away from said bottom surface,
• a second pair of deflectable switch blades laterally spaced from the first pair, one nominally top blade in said second pair being mounted to said base member for being deflected away from said top surface and the other nominally bottom blade in said pair being mounted to said member for being deflected away from said bottom surface,
• a first pair of nominally top stationary contact members mounted to said base member, one member in said first pair being spaced from and aligned with said deflectable top blade in said first pair of blades and the other contact member in the first pair being spaced from and aligned with said deflectable top blade in said second pair of blades,
• a second pair of nominally bottom stationary contact members mounted to said base member, one member in said second pair being spaced from and aligned with said deflectable bottom blade in said first pair of blades and the other contact member being spaced from and aligned with said deflectable bottom blade in said second pair of blades,
• one electric terminal means on said base member for connecting in common to both of said top stationary contact members and for connecting to one end of said motor starting winding and another terminal means on said base member for connecting in common to both of said bottom stationary contact members and for connecting to the other end of said motor starting winding,
• one electric terminal means for connecting in common to one side of a power main, to said first pair of deflectable switch blades and to one end of said motor running winding and another terminal means for connecting in common to the other side of said power main, to said second pair of deflectable switch blades and to the other end of said motor running winding,
• a switch operator including a shaft mounted to said base member for turning from a neutral position through limited opposite angles and having axially spaced apart oppositely radially extending arms disposed respectively between blades in said first and second pairs of deflectable switch blades, said shaft having means for being engaged by said movable actuator member to cause said shaft to turn,
• turning said shaft in one direction by said actuator in correspondence with said motor slowing down below a predetermined rotational speed causing one of said arms to deflect one of said switch blades in the first pair into contact with a top stationary contact and the other of said arms to deflect one of said switch blades in the second pair into contact with a bottom stationary contact to cause current flow in one direction through said starting winding, and
• turning said shaft oppositely of said one direction by said actuator causing said one arm to deflect the other one of the switch blades in said first pair into contact with a bottom stationary contact and the other of said arms to deflect the other of said switch blades in the second pair into contact with a top stationary contact to cause current flow oppositely of said one direction through said starting winding.