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4694192 |
Simplified demand limit control
A demand limit control system for maintaining power consumption of loads within a building below an upper demand limit, the upper demand limit being separated from a lower demand limit by a...
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4694373 |
Circuit breaker with digital solid-state trip unit with optional functions
Digital solid-state trip unit designed to provide protection against phase faults, notably overloads and short-circuits and optional functions, in this case ground fault protection and load...
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4692591 |
Humidifier controller having multiple-phase electrode current sensor
A controller for controlling an electrode boiler steam humidifier, of the type operable from a source of polyphase alternating current, is provided. A plurality of current loop transformers,...
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4686630 |
Load management control system and method
A load management control system and method which communicates load shedding information from a central station controller via existing telephone lines to a substation controller. The substation...
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4682279 |
Operation mode controller
In an operation mode controller wherein a sensor for sensing a quantity of a variable to be controlled is provided and a plurality of operation modes are changed from one to another in accordance...
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4680483 |
Comparator circuit
A comparator for sensing a small voltage differential at, or close to, the operating voltage rails includes first and second means for producing first and second currents and for producing a third...
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4679462 |
Differential transmission mechanism for a constant speed drive
A differential transmission mechanism using an output differential for a constant speed drive has desirable characteristics including full utilization of the torque capabilities of the hydraulic...
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4661717 |
Load condition determining apparatus
A load condition determining apparatus having a drive circuit having first and second MOS-transistors, the drains of the MOS-transistors are connected to a power supply respectively, the...
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4659943 |
Peak demand limiter
A peak demand limiter to monitor a plurality of electrical circuits and to selectively switch the circuit in a predetermined pattern based on priority selection comprises a load detection circuit...
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4659941 |
Power sensing device
A power sensing device is disclosed for use with an electrical alternating current (AC) power source, a primary load, and a plurality of secondary loads. The power sensing device detects when the...
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4657179 |
Distributed environmental/load control system
A distributed environmental/load control system comprising a thermostat operable to supply signals indicative of sensed and desired values of a parameter in an environmentally controlled space to a...
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4656835 |
Demand limit control by integral reset of thermostats
A temperature control system for a building is disclosed utilizing a central demand limit controller. The system includes a number of control modules or thermostats that have both proportional...
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4639609 |
Load current management system for automotive vehicles
An electrical power delivery system and method of operation particularly suitable for use in a vehicle is disclosed. A single wire power conductor is connected through remote power switches to a...
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4633672 |
Unequal compressor refrigeration control system
An apparatus and method for controlling a multi-compressor refrigeration system. The controller is designed to maintain a target temperature in a specified area. It achieves this goal by selecting...
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4634843 |
Dual mode power control arrangement for cooking appliance
A power control arrangement particularly applicable to a multiple surface unit cooking appliance providing a griddle heated by the combination of a standard surface unit and an automatic surface...
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4617472 |
Recreational vehicle power control system
A power management system for a recreational vehicle operates automatically to disconnect a major electrical appliance, such as an air conditioner, heater or water heater, from power when the...
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4593349 |
Power sequencer
A peripheral power control sequencer incorporates a microcomputer to control the sequencing of the powering of a plurality of peripheral control units. The terminals of the input/output ports of...
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4583182 |
Controllable risk parameter for device control system
The subject device control system provides a new method of determining when resource consuming loads are to be disabled to prevent the total resource consumption from exceeding a predetermined...
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4580071 |
Generator cooling apparatus
A variable output generator for supplying electrical power to a specific load is cooled by a plurality of motor driven fans 112, 113, 114, 115 disposed in a generator pit 2. An appropriate number...
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4575679 |
Automatic load shed control for spacecraft power system
An automatic load shed control for a spacecraft power system employs a selectable one of a plurality of charging gains to approximate a state of charge in a secondary battery system. An ampere hour...
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4575640 |
Power circuit control apparatus for primary and auxiliary loads
A consumer electronics product such as a portable radio or combination radio/tape recorder having both primary and auxiliary loads is provided with power control apparatus for energizing both loads...
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4574355 |
Arrangement for sensing remote binary inputs
An improved switch input arrangement for a system that remotely controls distributed electrical loads. The switch input arrangement is part of a transceiver decoder that receives commands from...
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4562550 |
Remote load control relay processor
An improved relay actuating processor for a system that remotely control distributed electrical loads. The relay module is a part of a transceiver decoder that receives commands from a central...
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4559441 |
Method of controlling a space heating system
A method of controlling a space heating system having a plurality of electrical resistance heaters includes the steps of computing the aggregate number of resistance heaters required to be...
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4549274 |
Distributed electric power demand control
A distributed load processing system for shedding and/or adding loads controlled by a plurality of processors for maintaining power demand by the loads below a predetermined amount including a...
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4542849 |
Method and apparatus for regulating a heating installation in premises including a plurality of heat generators
The present invention relates to a method and to apparatus for regulating a heating installation in a premises comprising a plurality of heating generators. The apparatus comprises temperature...
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4542283 |
Electrical heat loss control for building perimeter employing plural heaters
A perimeter heat loss control system for electrical heaters and/or radiant ceiling panels around the periphery of a building has the heaters divided into zones, usually one zone for each outside...
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4539821 |
Capacity control device for controlling a variable displacement compressor in an air conditioning system
A capacity control device for a variable displacement compressor in a refrigerating or air conditioning system is disclosed. The capacity control device controls the operation of a variable...
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4520274 |
Method and apparatus for controlling the loads or a plurality of units on a shared source
An apparatus for controlling loads of a plurality of units on a shared source which includes a timer interfaced with a computer controlling the connection of each individual unit to the source on...
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4514619 |
Indirect current monitoring via voltage and impedance monitoring
Electrical circuitry for monitoring the current flow through resistance elements on the leading edge of an aircraft wing or horizontal stabilizer. The resistance elements are individually and...
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4509585 |
Energy management control system
The supply of energy in response to thermostat demand, to heating and cooling equipment is reduced by intermittent interruption during demand intervals and prolonged intermittently upon cessation...
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4510398 |
Add/shed load control according to multiple add/shed sequences
An add/shed system for adding/shedding loads to maintain a building's power consumption below a predetermined level, each load being assigned to one of the multiple types of add/shed routines, each...
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4506146 |
Wire temperature controller
A method and apparatus are described for controlling the temperature of a heated wire, such as on a wire sealer for plastic film. Temperature control is based upon measurements of changes in the...
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4501125 |
Temperature conditioning system staging control and method
A control for a multi-stage heating and cooling system used to temperature conditioning a comfort zone. The control includes a microprocessor responsive to a temperature sensor installed in the...
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4488106 |
Resettable power limiting apparatus
This apparatus can limit the power by limiting the duty cycle of current carried by a pair of lines. These lines intermittently conduct electrical power. A clock can provide a periodic timing...
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4480197 |
Multiple load switching circuit
The specification discloses an electronic circuit which allows selective energization of electrical loads from a remote location by successive momentary interruptions of a common power source. In...
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4477733 |
Temperature dependent duty cycler control system
The device herein is a temperature dependent duty cycler control system which provides a duty cycle off time locus responsive to a sensed temperature, and is characterized by two selectable off...
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4476398 |
Home demand controller
A demand controller uses a sensor to detect the operation of an electric load. The sensor operates a relay which supplies power to a magnetic contactor. The magnetic contactor controls power...
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4475076 |
Power tapping apparatus
This apparatus can apply electrical power to a supply terminal from a pair of lines having a variable current and voltage. The apparatus has a voltage tapper and a series device. The voltage tapper...
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4467616 |
Temperature control system for an air conditioner
The disclosed temperature control system for an air conditioner includes a sensor for sensing an actual air temperature and a comparator for determining the temperature difference between the...
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4465942 |
Electrical installation for triggering switching functions in motor vehicles
An electrical installation for triggering switching functions in motor vehicles, with a central unit producing from input signals, coordinated output signals to switch load switches, and a...
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4463574 |
Optimized selection of dissimilar chillers
A system for meeting building air conditioning load conditions by optimally selecting a combination of chillers having dissimilar efficiency characteristics, the system having a load sensor for...
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4463432 |
Power controller using dual deadbands for reducing oscillatory load manipulations
A sliding window power demand control system switches loads, of sufficient size and function to cause a significant effect on plant energy consumption, ON and OFF. Loads to be switched are selected...
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4453088 |
Multiplex system for steering wheel mounted switches
A multiplex system is disclosed in which a plurality of auxiliary switches are mounted on a vehicle steering wheel and are selectively actuable to transmit predefined current levels through the...
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4447712 |
Heating system
A system for space heating a dwelling, office and the like having a plurality of heating means and having a control mechanism for sequentially actuating said heating means to actuate only one said...
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4446359 |
Peak load control for an electric heating system
A peak load control apparatus with operating mode selection for an electric heating system having a plurality of electric heating units arranged in two or more groups in different rooms is...
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4439722 |
Ferroresonant power supply stabilizer circuit for avoiding sustained oscillations
A stabilization circuit is provided for use with a ferroresonant power supply to maintain a steady output voltage during power line transients, rapid load changes, or no load condition. The...
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4430576 |
Remote load selector circuit and method
A method and circuit for controlling the selection of remote electrical loads. An illustrated embodiment of the remote load selector circuit is depicted in conjunction with an electric ceiling fan...
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4423335 |
Energy controller and method utilizing bi-metal elements to adjust thermostat setting and to shed and restore controlled loads in prioritized order
A residential energy controller includes a first bi-metal element having a free end and a stationary end. A second bi-metal element has a first end connected to the free end of the first bi-metal...
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4419589 |
Multi-stage electrical control system
Multi-stage electrical load control apparatus includes current transformers for sensing the on and off status of electrical load elements and a predetermined priority system selectively allows...
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