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4390876 |
Electric utility demand limiting device and method
An electric utility demand limiting device and method for disconnecting and reconnecting a load, such as a residential customer load, from a utility company power system. The device may include a...
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4356485 |
Device for the signal-technical secure control and monitoring of electrical loads
In a remote control system which is operated by way of light wave guides a specific switching routine is executed at the receiving side upon failure of the system. As long as the remote control...
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4326264 |
Display system for a supervisory control system
An automatic supervisory control system is arranged to provide monitoring and supervisory functions in a noisy electrical environment over communication channels which are also noisy and generally...
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4317987 |
Remote control device for a water heater
A remote control device for controlling the operation of a conventional domestic water heater (18) used singularly or in conjunction with a solar heating system. The control device comprises a...
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4200862 |
Appliance control
An applicance control system comprises a data transmitter and plurality of slave units plugged into outlet sockets of a power main of a building, appliances being coupled to the slave units. The...
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4186381 |
Gasoline station registration and control system
A gasoline station with self-service and attendant operated pumps and a fuel delivery control and registration system with a fixed remote control unit operable for selectively activating each...
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4180801 |
System for supervising connection points
The invention is characterized by the use of electronic scanners independently controlled by a control unit, said scanners cyclically scanning in an autonomous manner the matrices of the contacts...
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4160238 |
Remote control addressing and reply indicating system
A plurality of receivers which can be respectively addressed by addressing pulses provide reply pulses on a separate reply signal bus indicative of a single digit, or multi-digit binary response...
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4112416 |
Control method for a remote supervisory control system
This invention relates to a control method for a remote supervisory control system which includes a single master station and N (plural) remote stations sporadically lying in distant places, said...
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4085403 |
Combined on-board remote control energy supply distribution and signaling system, particularly for automotive vehicles
A central station generates grouped clock pulses in recurring selection cycles, separated from each other by an extended control pulse (or pulse gap); particular loads are associated with...
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4034336 |
Electronic monitor system for automobiles
An electronic monitor system for automobiles warns the driver both by a flashing light or buzzer and by lighting an appropriate indicator light which tells the location if there is something wrong...
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3958240 |
Alarm and status monitoring system
Sequentially generated pulses are applied to respective groups of alarm and status condition responsive contacts. A memory is indexed in accordance with the pulses to store individual condition...
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3911399 |
Digital incremental emitter, especially for numerical control of machine tools
A pulse emitter or resolver and a circuit connected thereto for use in numerical control systems such as for machine tools, in which the emitter supplies at least two trains of pulses shifted 90...
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3882465 |
Remote control system having command and address signals
A signaling system located at a central station sequentially interrogates a plurality of remotely located transponders. Means are provided for interrupting the normal addressing sequence and for...
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3829848 |
STUCK ACTUATOR ALARM
A system for and method of determining if an actuator, such as a motor driving a stem of a valve in a line feeding a fibrous slurry to a paper making machine, is in a stuck condition includes a...
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3806872 |
ADDRESS INTERRUPT AND CURRENT STATUS DISPLAY
A signaling system located at a central station sequentially interrogates a plurality of remotely located transponders. Means are provided for interrupting the normal addressing sequence and for...
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3740718 |
CONTROL APPARATUS FOR AN ENVIRONMENTAL DATA SYSTEM
Control apparatus for an environmental data system of the type which continuously records the output of one or more field located environmental sensors, and which also counts and compares the...
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3732562 |
SURVEILLANCE SYSTEM
A surveillance system having a primary station from which signals are issued upon a coaxial cable to one or more surveillance stations. Each surveillance station selectively can impose an impedance...
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3705386 |
MONITOR FOR TIMING CIRCUITS
The input of a pair of gates are connected to a timing circuit, that produces periodic pulses having preset time duration and preset separation, in a manner so that the signals applied to the gates...
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3697953 |
SYSTEM FOR MONITORING ABNORMAL SYSTEM OPERATIONS IN A SYSTEM HAVING A CENTRAL STATION AND A PLURALITY OF REMOTE STATIONS
A system for alarming abnormal operations in a system having a central station and a plurality of remote stations connected by a transmission channel wherein operation of remote equipment is...
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3697952 |
REMOTE ACTUATED POLLUTION AND OIL FLOW CONTROL SYSTEM
The position of a high-low valve on oil wells is remotely controlled and monitored from a distant control station in order to either shut the said valve or other associated valves and controls in...
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3691528 |
CONTROL SYSTEM FOR AUDIO-VISUAL DEVICES CONNECTED BY CABLES
A system for controlling any of a plurality of information storage or generating devices which are grouped in operative association with common connectors along a cable common thereto by any of a...
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3689887 |
INFORMATION TRANSFER SYSTEM
An information transfer system uses coded signals identifying stations and commands for addressing selected stations and for performing selected commands on the selected stations to change their...
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3676604 |
MULTIPLE TRUNK SIGNAL ARRANGEMENT
A group of trunk circuits exhibiting a particular signal condition is detected by a respective one of a plurality of detecting circuits associated with a corresponding plurality of trunk circuit...
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3665439 |
OPERATION SUPERVISION SYSTEM FOR AIRPLANES
An operation supervision system for airplanes with a plurality of measuring feelers, which comprises means for transforming the measuring values into the form of electrical output signals....
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3643222 |
REMOTE SUPERVISORY SYSTEM
A remote supervisory system having two dynamic shift registers for storing a series of signals representing the new and the old state, respectively, of remotely supervised equipment, wherein the...
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3636560 |
TRANSMISSION SYSTEM MESSAGE FORMAT FOR REPORTING CONDITIONS FROM REMOTE STATIONS TO A CENTRAL STATION
A condition supervision system for supervising conditions of a building air conditioning system wherein processing and indication apparatus at a central station is connected over a transmission...
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3634824 |
SIGNALING SYSTEM UTILIZING FREQUENCY AND FREQUENCY DURATION FOR SIGNALING AND CONTROL FUNCTIONS
A signaling system having a plurality of remote stations for detecting the states of monitors associated therewith and for transmitting a signal representative of said states along signal...
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3622998 |
REMOTE CONTROL SYSTEM WITH VERIFICATION CAPABILITY
A system for operating actuators, such as electrically operable door locks, at one or more remote stations by means of a control unit at a central station. A lock signal of predetermined frequency...
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3618022 |
CONTROL APPARATUS
Control apparatus for use at an operator-plant interface, for example for controlling stage-lighting equipment, having three signal stores of which the first and second give control signal outputs...
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3577187 |
DIGITAL INFORMATION TRANSFER SYSTEM HAVING INTEGRITY CHECK
A digital information transfer system for selecting and then enabling a remote utilization device by a digital address including means for assuring system integrity. A selector is actuated to...
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3553449 |
CENTRAL OFFICE CONTROL CIRCUITS FOR REMOTE CONTROL SYSTEMS
Remote control system machine circuits incorporating solid state circuitry based on NOR logic. Each control function request is processed through a NOR circuit network which performs suitability...
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3529292 |
REMOTELY CONTROLLED LOAD CONTROLLING AND PROTECTION SYSTEM WITH SUPERVISION
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3529293 |
SUPERVISORY AND CONTROL SYSTEM
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3516063 |
SUPERVISORY AND CONTROL SYSTEM HAVING BUFFER STORAGE INPUT TO DATA LOGGER
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3475726 |
FUNCTION MONITORING CONTROL CIRCUITRY
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3452329 |
SUPERVISORY CONTROL SYSTEM
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3444521 |
SUPERVISORY CONTROL SYSTEM COMBINING SCANNING AND DIRECT SELECTION MODES OF OPERATION
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3394348 |
System and apparatus for automatic data collection
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3349374 |
Supervisory control system with message traffic control
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3324458 |
Monitoring apparatus
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3305850 |
Supervisory apparatus
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3302113 |
Remote monitoring and control system with all control and monitoring tones generatedat control station
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3256517 |
Remote alarm system with scanning by tones
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3222646 |
Supervisory remote control system
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3219927 |
Automatic functional test equipment utilizing digital programmed storage means
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3206729 |
System for ascertaining from a distance the electrical conditions of a switching device
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3205486 |
Digital annunciator system
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3189911 |
Operations indicating and recording apparatus
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3146456 |
Supervisory remote control apparatus
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