Abstract: A compact ribbon-indicator and chart-recorder instrument for use in process control systems adapted to indicate and simultaneously record the values of up to three independent process variables. The motive power for each pen/indicator drive system is supplied from a corresponding relatively high-speed stepping motor. Each such motor is servo-controlled by a feedback circuit including a potentiometer coupled to the pen drive cable for developing a d-c feedback signal to be compared with the d-c measurement signal. The system is arranged to actuate the motor immediately upon development of a deviation signal outside of a fixed dead-band, but the extent of initial motor movement is limited to a pre-set small amount (preferably one step). If the deviation signal still is outside of the dead-band after a predetermined period of time, a clock pulse oscillator is turned on to actuate the motor at a relatively rapid rate until the deviation signal returns to the dead-band.

Abstract: A monitoring device and method for determining the present demand of electrical energy consumed over a predetermined time period which includes an adjustable reflective scanner or sensor mounted exteriorily of an electric meter for sensing and determining the speed of the rotating disc of a conventional electric meter. The arrangement is such that the scanner or sensor detects the revolutions of the meter disc and emits a signal or signals which are amplified and fed into a counting device which includes a memory and in conjunction with a printer prints the time of day, the date (at midnight) and the number of revolutions of the rotating meter disc which is stored as recorded in memory for a given unit of time. The counting device, memory and printer are embodied in a printing calculator interfaced with timing and scanning means.

Abstract: A solid-state event-logging system records the occurrence of specified events in a removable, solid-state, memory cartridge. Counters continuously count pulses produced by a plurality of electrical energy measuring devices. Sample values of the continuous counts are produced and input to a microprocessor wherein each sample value has the previous sample value subtracted therefrom. The difference is added to an interval sum stored in a random access memory. The interval sums, together with real time information produced by a clock, are input to the memory cartridge according to a predetermined format. The clock is maintained in synchronization with the frequency of the line voltage by the microprocessor.

Abstract: Energy utilized or consumed at a given location or facility causes pulses to be generated as a function of the instant rate of energy use, and such pulses are counted during succeeding discrete time intervals. The succeeding interval summation count values are recorded in digital form at respective discrete locations in a memory, particularly on an ultraviolet (UV) light-erasable PROM (EPROM) contained in a removable cartridge having a UV substantially opaque case. The interval summation count values are summed to provide a grand total energy or power utilization or consumption figure which is fed into and stored at a discrete location in the EPROM memory at the end of the recording period.

Abstract: A selected point in an electric power system is monitored for subsequent fault analysis. The voltage and current at the point is continuously sampled with samples for a predetermined period of time being temporarily stored in memory. In response to a Fault Event, voltage and current samples at differing sample rates and for differing periods of time are recorded. Voltage and current samples after a Cold Load Pickup are recorded, also the recorded samples allow later analysis of the fault and identification of the cause of the fault.

Abstract: A transient signal processing circuit is disclosed which includes a signal input, an adjustable threshold detector for selecting from the signal input a signal portion having at least a minimum amplitude, a peak value detector connected to the threshold detector for providing an output when the signal portion reaches a maximum amplitude, a monostable multivibrator connected to the peak value detector to introduce a time delay and thereby allow the output to stabilize, a sample and hold circuit connected to the multivibrator to record the value of the maximum amplitude, and a clock connected to the multivibrator to indicate the time at which the maximum amplitude was attained.

Abstract: A digital apparatus for generating an energy log for instant recall and display comprising a microcomputer including microprocessor with interrupt capability, programmable timer, keyboard and digital output. The apparatus is permanently programmed in read-only memory with a task to continuously update data and time information stored in read/write memory, a task to process each interrupt corresponding to pulsed signals indicative of energy usage and to add a unit to one memory location corresponding to that type of energy usage on a given date and a task to select and display time and date and to select and display functions of the contents of the memory locations corresponding to energy usage. The tasks are entirely interrupt activated.

Abstract: Energy utilized or consumed at a given location or facility causes pulses to be generated as a function of the instant rate of energy use, and such pulses are counted at succeeding discrete time intervals. The succeeding interval summation count values are recorded in digital form at respective discrete locations on an ultraviolet UV light-erasable PROM (EPROM) contained in a removable cartridge having a UV substantially opaque case. The interval summation count values are summed to provide a grand total energy or power utilization or consumption figure which is fed into and stored at a discrete location in the EPROM memory at the end of the recording period.

Abstract: A data acquisition system capable of resolving transient pulses in the subnanosecond range. A pulse in an information carrying medium such as light is transmitted through means which disperse the pulse, such as a fiber optic light guide which time-stretches optical pulses by chromatic dispersion. This time-stretched pulse is used as a sampling pulse and is modulated by the signal to be recorded. The modulated pulse may be further time-stretched prior to being recorded. The recorded modulated pulse is unfolded to derive the transient signal by utilizing the relationship of the time-stretching that occurred in the original pulse.

Abstract: Test apparatus which indicates the peak potential to which copy paper is charged, the surface potential remaining after a dark decay interval, and the potential remaining after a light exposure interval.

Abstract: Utility usage monitoring systems for monitoring the consumption or use of a particular utility and displaying the accumulated use in terms of its cost. The rate of usage of the utility is converted to a pulse train with a repetition rate dependent upon the usage. In one embodiment, a calculator chip having an automatic constant capability and coupled to an electronic display is caused to successively execute a summing operation dependent upon the pulse train repetition rate and to provide a cumulative total for display. A keyboard is provided to enter the automatic constant, and to allow the change thereof to provide the proper utility cost or charge. Another embodiment utilizes a microprocessor coupled to a display for displaying the accumulated utility usage, with the microprocessor being programmed to repetitively update the display.

Abstract: An apparatus for measuring the intensity of current produced in an elongated electrical conductive member by a lightning strike for determining the intensity of the lightning strike. The apparatus includes an elongated strip of magnetic material that is carried within an elongated tubular housing. A predetermined electrical signal is recorded along the length of said elongated strip of magnetic material. One end of the magnetic material is positioned closely adjacent the electrically conductive member so that the magnetic field produced by current flowing through said electrically conductive member disturbs a portion of the recorded electrical signal directly proportional to the intensity of the lightning strike.

Abstract: An apparatus for monitoring, analyzing and accurately determining the value of peak current, the peak rate of change in current with respect to time and the rise time of the electrical currents generated in an electrical conductive mast that is located in the vicinity where lightning is to be monitored. The apparatus includes an electrical coil for sensing the change in current flowing through the mast and generating a voltage responsive thereto. An on-site recorder and a recorder control system records the voltages produced responsive to lightning strikes and converts the voltage to digital signals for being transmitted back to the remote command station responsive to command signals. The recorder and the recorder control system are carried within an RFI proof environmental housing into which the command signals are fed by means of a fiber optic cable so as to minimize electrical interference.

Abstract: A translator system which includes circuitry for differentiating between normal interval timing pulses and power loss pulses on meter telemetry recordings. The pulses are recorded with a different waveform and are applied to wave-shaping circuitry which produces pulses corresponding to the time interval pulses which are longer than the pulses produced which correspond to the power loss pulses. A pulse duration recognizing circuit distinguishes between the pulses of different duration and provides a pulse output at one of two terminals depending on which pulse type is recognized. Pulses corresponding to the time interval pulses are transferred to the analyzing circuits of the translator. A masking circuit prevents recognition of a power loss pulse except during a predetermined time interval which corresponds to the only time such a pulse may correctly exist on the recording. Circuitry is included which informs the analyzing circuits of the translator when a power loss pulse is properly recognized.

Abstract: A device for periodic, automatic, readable recording of a meter value from a consumption measuring meter including a casing attachable to an otherwise conventional meter and provided with a slot, a printing unit disposed within the casing and located out of the plane of the slot in order to be tamper-proof, the printing unit being composed of an identification data printer and a consumption value printer and being adapted upon insertion of a record card in the slot of the casing to apply to the record card a visually readable marking of the identification data and meter consumption value, and a push button connected to the printing unit and manually actuable for causing the marking to be applied to the record card by shifting the printing unit towards the record card inserted into the casing through the slot.

Abstract: A corona discharge detection system is disclosed. The detection system is composed of two basic sub-systems, a detection record system and a detection playback. The detection record system detects a corona discharge, visually displays the discharge on a cathode ray tube and records the corona discharge video data along with voice and geographic data. The playback system processes the recorded information to provide a playback of the recorded data. The playback system includes an audio system that reproduces the stored audio information and a strip chart recorder that reproduces the corona video data and the geographic data to provide a visual record of this data.