Vacuum cleaner

Claim 2

A portable electrically powered vacuum cleaner for household use having a variable speed motor-blower with a stator utilizing a plurality of field coils, an accessible compartment for a filter bag and means for conducting the flow of air through a filter bag in the compartment, the combination of means for conducting flow of air from the filter bag in the compartment through the motor to cool the stator of the motor, manually settable switch means connected to said field coils for varying the speed of the motor-blower to control the volume flow of air through said bag and motor stator within a range of working speeds, manually held switch means including a switch and impedance varying motor circuit connections to increase the wattage of electrical current through said motor to surge the volume flow of air through said bag and motor stator at a speed higher than said range of speeds, and means responsive to the temperature of said stator core for indicating critical changes of permeability of said bag to air flow therethrough for all speeds respectively.

Claim 3

The vacuum cleaner defined in claim 1 in which said settable switch means includes a half wave electrical current rectifier and said manually held switch means includes a switch shunting said rectifier.

Claim 4

manually operated switch means including a. an electrical connection including a first switch to connect two field coils in series electrically to provide a high impedance field on the field core for a low speed performance, b. an electrical connection including a second switch shunting one coil and said first switch, c. an electrical connection including a third switch shunting the other coil and said first switch, said second and third switches connecting the coils in parallel to provide a low impedance field on the field core in series with the armature for high speed performance,

Claim 5

manually operated switch means including a. an electrical connection including a first switch to connect two field coils in series electrically to provide a high impedance field on the field core for a low speed performance, b. an electrical connection including a second switch shunting one coil and said first switch, c. an electrical connection including a third switch shunting the other coil and said first switch, said second and third switches connecting the coils in parallel to provide a low impedance field on the field core in series with the armature for high speed performance,

Claim 6

an electrical current flow reducing means in series with the armature and said two field coils,

Claim 7

an electrical current flow reducing means in series with the armature and said two field coils,

Claim 8

The vacuum cleaner defined in claim 1 in which said manually held switch means includes permutable switches changing motor-blower field coil connections between series and parallel configurations to change their composite impedance.

Claim 9

The vacuum cleaner defined in claim 1 in which said settable switch means includes permutation switches selectively connecting in series with each other two separately operative circuits of series connected pairs of field coils to provide a high impedance field, one of the series circuits including a half wave rectifier shunted by a switch controlled by one of said switch means.

Claim 10

manually operatEd switch means controlling the current flow reducing means and movable alternately to two positions in one of which a low impedance is presented to the current flow for a high speed performance and the other position a high impedance is presented to the current flow in the circuit for low speed performance, and

Claim 11

manually operatEd switch means controlling the current flow reducing means and movable alternately to two positions in one of which a low impedance is presented to the current flow for a high speed performance and the other position a high impedance is presented to the current flow in the circuit for low speed performance, and

Claim 12

resilient means urging one of said switch means to a resting position of high impedance and manually movable in coaction with the other switch means to provide a composite low impedance speed surge flow of air through said filter bag.

Claim 13

resilient means urging one of said switch means to a resting position of high impedance and manually movable in coaction with the other switch means to provide a composite low impedance speed surge flow of air through said filter bag.

Claim 14

The vacuum cleaner defined in claim 4 in which said one of said switch means is the settable switch means.

Claim 15

The vacuum cleaner defined in claim 1 including resilient means urging said manually held switch means to a resting position in which the impedance controlled thereby is the highest.

Claim 16

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filter bag in the compartment and including

Claim 17

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filter bag in the compartment and including

Claim 18

The vacuum cleaner defined in claim 7 in which said current flow reducing means includes a half wave rectifier and said switch means controlling the current flow shunts the rectifier in its low impedance position.

Claim 19

The vacuum cleaner defined in claim 8 in which said resilient means actuates the half wave rectifier switch means.

Claim 20

The vacuum cleaner defined in claim 7 in which said resilient means urges the first mentioned switch means to its high impedance position.

Claim 21

The vacuum cleaner defined in claim 7 in which said flow reducing means is a second pair of field coils inductively coupled with said stator core and connected in series with the armature, and said switch means controlling said flow reducing means including a fourth switch connection to connect the second pair of field coils in series, a fifth switch connection to shunt one of the second pair of coils and said fourth switch, and a sixth switch connection to shunt the other of the second pair of coils an said fourth switch, said fifth and sixth switches connecting the second pair of coils in parallel and opening said fourth switch to provide a low field impedance.

Claim 22

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filter bag in the compartment and including a variable speed motor-blower whose field core includes a plurality of stator poles and a plurality of field coils thereon connected in series circuit with an armature between two power connections to drive a blower and force air through said filter bag, an electrical connection including a first switch to connect two of said field coils electrically in series, an electrical connection including a second switch to connect two other field coils in series and in series with the armature, an electrical current flow reducing means in series with one of said electrical connections, manually operated switch means controlling the current flow reducing means and being movable alternately between two positions in one of which a low impedance is presented to the flow of current in said one of the connections and the other of which a high impedance is presented to the flow of current in the circuit, an electrical connection including a third switch to connect one of said two field coils in series with one of the power connections, an electrical connection including a fourth switch to connect the other of said two field coils in series with the other one of said power connections, manual means for alternately closing said first and second switches as a unit and said third and fourth switches as a unit, means urging the last said manual means to close the switches in the connections having said flow reducing means in series therewith.

Claim 23

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filter bag in the compartment and including a variable speed motor-blower whose field core includes a plurality of stator poles and a plurality of field coils thereon connected in series circuit with an armature between two power connections to drive a blower and force air through said filter bag, an electrical connection including a first switch to connect two of said field coils electrically in series, an electrical connection including a second switch to connect two other field coils in series and in series with the armature, an electrical current flow reducing means in series with one of said electrical connections, manually operated switch means controlling the current flow reducing means and being movable alternately between two positions in one of which a low impedance is presented to the flow of current in said one of the connections and the other of which a high impedance is presented to the flow of current in the circuit, an electrical connection including a third switch to connect one of said two field coils in series with one of the power connections, an electrical connection including a fourth switch to connect the other of said two field coils in series with the other one of said power connections, manual means for alternately closing said first and second switches as a unit and said third and fourth switches as a unit, means urging the last said manual means to close the switches in the connections having said flow reducing means in series therewith.

Claim 24

The vacuum cleaner defined in claim 12 in which said four switches constitute a double pole double throw type switch.

Claim 25

The vacuum cleaner defined in claim 12 in which the first mentioned switch is a double pole single throw switch with an OFF position.

Claim 26

The vacuum cleaner defined in claim 12 including a rectifier connected in series in said series circuit, switch means connected in said series circuit in parallel with said rectifier, and manual means for actuating the last mentioned switch means.

Claim 27

The vacuum cleaner defined in claim 15 in which the said twO field coils are connected at one end to the armature, and said two other field coils are connected in series with said rectifier.

Claim 28

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filler bag in the compartment and including a variable speed motor-blower whose field core includes a plurality of stator poles and a plurality of field coils thereon collectively connected in series circuit with an armature between two power connections to drive the motor blower and force air through said filter bag, an electrical connection connecting two of said field coils electrically in series as a unit, an electrical connection connecting two other field coils in series as a unit an electrical connection including first switch means to connect said units in series with each other in said series circuit, an electrical connection including second switch means to connect one of said units to shunt the other unit in said series circuit, manual means for alternately opening and closing said switch units oppositely and simultaneously, means urging the last said manual means to close the first switch and open said second switch.

Claim 29

An electrically powered portable vacuum cleaner for household use having an accessible compartment for a filter bag and means for conducting the flow of air through a filler bag in the compartment and including a variable speed motor-blower whose field core includes a plurality of stator poles and a plurality of field coils thereon collectively connected in series circuit with an armature between two power connections to drive the motor blower and force air through said filter bag, an electrical connection connecting two of said field coils electrically in series as a unit, an electrical connection connecting two other field coils in series as a unit an electrical connection including first switch means to connect said units in series with each other in said series circuit, an electrical connection including second switch means to connect one of said units to shunt the other unit in said series circuit, manual means for alternately opening and closing said switch units oppositely and simultaneously, means urging the last said manual means to close the first switch and open said second switch.

Claim 30

An electrically powered appliance for household use and including a variable speed motor and a blower driven thereby for cooling said motor, said motor having an armature and a field core including a plurality of stator poles and a plurality of field coils thereon, said field coils being collectively connected in series circuit at one end with said armature, a first connection connecting said armature to one side of a source of electrical current and said coils to drive said motor, said armature being mechanically located between said field coils and said one side of said source of electrical current, an electrical connection connecting two of said field coils on opposite stator poles electrically in series as a unit, another electrical connection connecting two other of said field coils on opposite stator poles electrically in series as a unit, a third electrical connection including a first switch means to connect said coil units in series with each other in said series circuit, a fourth electrical connection connecting the other end of said series circuit to the other side of a source of electrical current and including a second switch means to connect one of said coil units to shunt the other unit in said series circuit to said second source of electrical current, manual means for alternately opening and closing said switch means oppositely and simultaneously, means urging the last said manual means to close the first switch means and open said second switch means.

Claim 31

An electrically powered appliance for household use and including a variable speed motor and a blower driven thereby for cooling said motor, said motor having an armature and a field core including a plurality of stator poles and a plurality of field coils thereon, said field coils being collectively connected in series circuit at one end with said armature, a first connection connecting said armature to one side of a source of electrical current and said coils to drive said motor, said armature being mechanically located between said field coils and said one side of said source of electrical current, an electrical connection connecting two of said field coils on opposite stator poles electrically in series as a unit, another electrical connection connecting two other of said field coils on opposite stator poles electrically in series as a unit, a third electrical connection including a first switch means to connect said coil units in series with each other in said series circuit, a fourth electrical connection connecting the other end of said series circuit to the other side of a source of electrical current and including a second switch means to connect one of said coil units to shunt the other unit in said series circuit to said second source of electrical current, manual means for alternately opening and closing said switch means oppositely and simultaneously, means urging the last said manual means to close the first switch means and open said second switch means.

Claim 32

The combination called for in claim 18 in which said third electrical connection includes an electrical current flow limiting device, and switch means for shorting out said device.