Remote load selector

• US 4,322,632 A
• Filed: 03/24/1980
• Issued: 03/30/1982
• Est. Priority Date: 03/24/1980
• Status: Expired due to Term

• Current Assignee: Ranco Incorporated of Delaware (Schneider Electric SE)
• Original Assignee: Teccor Electronics Incorporated (Teccor)
• Inventors: Hart, Edward F., Fletcher, Deane D. II
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): SCHREYER, STAFFORD
• Application Number:
  US06/133,350
• Time in Patent Office: 736 Days
• Field of Search: 307/38, 307/41, 307/115, 307/29, 307/242, 307/252 B, 307/252 N, 307/252 Q, 315/322, 318/102, 340/310 A, 361/191
• US Class Current: 307/41
• CPC Class Codes: H02J 13/00009 using pulsed signals
• CPC Class Codes: H02J 13/0001 using modification of a parameter of the network power signal
• CPC Class Codes: H03K 17/735 Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors H03K17/722 takes precedence; logic circuits H03K19/00; code converters H03M5/00, H03M7/00
• CPC Class Codes: H05B 47/185 via power line carrier transmission
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 10/52 Outage or fault management, e.g. fault detection or location
• CPC Class Codes: Y04S 20/246 the system involving the remote operation of lamps or lighting equipment

Abstract

Circuitry for applying electrical power to one or more load devices under control of a remotely located manually operable switch coupled to the circuitry by a single power transmission line. The circuitry responds to toggling of the remotely located switch to, for example, in a first state apply power to a first load, in a second state apply power to the second load, and in a third state apply power to both the first and second loads.

Claims

1. A remote load selector circuit for use with a system having a manually operable power switch coupled by an electrical transmission line to a plurality of remotely located loads, said selector circuit comprising:

a plurality of gate controllable switching devices, each of said plurality of switching devices having power terminals adapted for connection in series with a selected one of said remotely located loads and having a gate input for controlling conduction between said power terminals;

a plurality of bistable multivibrators, each of said multivibrators having at least one input for receiving a power transition signal and having at least one output coupled to the gate input of a selected one of said plurality of gate controllable switching devices; and

,

transition detecting means adapted for connection to said transmission line for providing a power transition signal in response to the application or removal of power to or from the transmission line portion connecting said manually operable power switch to said plurality of remotely located loads in response to the closing or opening of said manually operable power switch, and said transition detecting means being coupled to at least one input of each multivibrator for changing the output state of at least one of said plurality of bistable multivibrators in response to the power transition signal.

2. The remote load selector circuit as defined in claim 1,

said bistable multivibrators being interconnected in a logical feedback configuration whereby the logical output state of one or more of said multivibrators is changed and said loads are actuated singly or in combination in response to toggling of said manually operable power switch.

3. The remote load selector as defined in claim 1, including

means coupled to each bistable multivibrator for maintaining the multivibrator output states which occur in response to a power transition signal provided in response to the temporary interruption of power to said transmission line portion and remote loads as said power switch is toggled.

4. A selector circuit for selectively supplying power to one or more load devices under control of a manually operable switch comprising:

a plurality of electronically controllable power switches, each power switch having power terminals adapted for connection in series with one of said loads and having a gate input terminal for controlling conduction between said power terminals;

digital storage means adapted for connection to said switch for receiving operating power when said switch is in closed circuit condition, said digital storage means having a plurality of logical outputs, at least one of said logical outputs being coupled to a gate input of each power switch;

transition detecting means adapted for connection to said switch for providing a power transition signal in response to the application or removal of power to or from said digital storage means and loads in response to the closing or opening of said manually operable power switch, and said transition detecting means being coupled to said digital storage means for changing the output state of at least one of said plurality of logical outputs in response to said power transition signal; and

,

means coupled to said digital storage means for maintaining the logical output states of said digital storage means which occur in response to a power transition signal provided in response to the temporary interruption of power to said digital storage means and load devices as said manually operable switch is toggled.

5. A method for selectively supplying power to one or more load devices under control of a manually operable power switch comprising:

connecting the power terminals of a plurality of gate controllable power switches in series with each of said loads;

coupling at least one output of a digital memory device to a control gate of each of said power switches, to control the on/off condition of said switches by the logic states of said memory outputs;

generating a power transition signal in response to the application or removal of power to or from said digital memory device and load devices in response to the closing or opening of said manually operable power switch;

changing the output state of at least one of said plurality of logical outputs of said digital memory device in response to said power transition signal; and

,

maintaining the logical output states of said digital storage means which occur in response to a power transition signal caused by the temporary interruption of power to said digital memory device and load devices as said power switch is toggled.