Electric vacuum cleaning and agitator motor control system
First Claim
1. A control system for selectively energizing and supplying power to a central and a remote electrical load device interconnected by a single conductor pair from a common control located at the remote device comprising:
- a. power means at the location of the central electrical device for providing electrical power to said central device and to the conductor pair interconnecting said central device with the remote electrical device;
b. first switching means interposed between said power means and said central device for controlling the flow of electrical current to said central device;
c. second switching means at the location of said remote device and interposed in one conductor of said pair for controlling the flow of electrical current to said remote device;
d. detecting means at the location of said central device and interposed in one conductor of said pair of detecting an electrical current flow through said conductor pair; and
e. actuating means responsive to said detecting means and coupled to said first switching means for actuating said first switching means in response to a current flow detected by said detecting means.
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Abstract
Electrical energization and control circuit particularly for use in permanently installed vacuum cleaning systems having a centrally located A.C. powered vacuum turbine and a remote flexible cleaning unit equipped with low voltage A.C. or D.C. agitator motors. Energization of the A.C. turbine motor circuit is controlled by a current sensor in the one of the two wires leading to the remote low voltage agitator motor so that a selector switch in the handle of the cleaning unit may, in one position, energize the low voltage agitator motor or, in a second position, bypass the agitator motor through a resistance to initiate a current flow that is sensed by the current sensor to activate the A.C. motor circuit.
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Citations
10 Claims
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1. A control system for selectively energizing and supplying power to a central and a remote electrical load device interconnected by a single conductor pair from a common control located at the remote device comprising:
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a. power means at the location of the central electrical device for providing electrical power to said central device and to the conductor pair interconnecting said central device with the remote electrical device; b. first switching means interposed between said power means and said central device for controlling the flow of electrical current to said central device; c. second switching means at the location of said remote device and interposed in one conductor of said pair for controlling the flow of electrical current to said remote device; d. detecting means at the location of said central device and interposed in one conductor of said pair of detecting an electrical current flow through said conductor pair; and e. actuating means responsive to said detecting means and coupled to said first switching means for actuating said first switching means in response to a current flow detected by said detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power transmission and control system for a central vacuum cleaning system having a centrally located electrical vacuum motor and at least one remote cleaning unit to be coupled to the vacuum system and carrying an agitator brush driven by a motor, said system comprising:
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a. a pair of conductors coupled to a source of electrical power at the location of the centrally located electrical vacuum motor and to the agitator motor in the remote cleaning unit; b. a double-throw switch positioned in the handle of said remote unit and coupled between one conductor of said pair of said agitator motor, one position of said switch for supplying electrical power to said motor and the second position of said switch for providing electrical continuity across said pair whereby said motor is shunted while current flows through said pair of conductors; c. a current sensor at the location of said centrally located vacuum motor and interposed in one conductor of said pair, said sensor generating a control voltage in response to a flow of current through said conductor pair; d. a power transmission line connecting said centrally located electrical vacuum motor to a source of electrical power; and
,e. an electrically responsive power switch interposed in said power transmission line and coupled to said current sensor for actuation by the control voltage generated therein. - View Dependent Claims (9, 10)
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Specification