Load survey recorder for measuring electrical parameters
USRE31668E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1976 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Aug 12, 1996 |
Classification
- Technology area (CPC —)General
Abstract
A survey recorder for measuring electrical loads and providing a magnetic tape record of data with time reference signals in format capable of providing computer compatible information. The data recording circuit utilizes a light emitting diode with a phototransistor to determine each quantum measurement by the meter, and a trigger circuit driven by the phototransistor feeds a solid state divider circuit which is programmable to provide various I/O pulse ratio outputs to the data recording head. A power outage circuit detects outages which are greater than a predetermined duration and provides distinctive pulses to a time recording circuit to effect a recognizable format on the magnetic tape which identifies the power outage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.