Control of a device in an inaccessible location

Details Control of a device in an inaccessible location Control of a device in an inaccessible location

1996-09-03

1998-08-18

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

340514, 340653, 340693, 324 96, 324537, 345207, 345211, 361173, G08B 2100

Patent

active

057963479

ABSTRACT:
An arrangement is provided to power and initiate the output of information sensed and/or stored by a device in a sealed environment having a viewing window. The device is powered and the output is initiated by the input of a light source to the device. When the output is initiated, the device provides a display representing the information. In a specific arrangement, the device scrolls to display the information on a sequential, repetitive basis while the light source is directed onto the device. In one specific embodiment, the device is powered by a solar cell or the like. In one specific application of the invention, the information represents the real-time primary voltage of components and circuitry within the switchgear. In another specific application of the invention, the device is located within a sealed switchgear enclosure and the information represents the faulted phase or phases of the power distribution circuit to which the switchgear is connected. The information is obtained and stored in a non-volatile memory before the circuit is deenergized. Alternatively, a non-volatile storage arrangement is provided that can be sensed after the circuit is deenergized, e.g. mechanical or magnetic.

REFERENCES:
patent: 4533865 (1985-08-01), Schlenk
patent: 4602907 (1986-07-01), Foster
patent: 4608601 (1986-08-01), Shreck et al.
patent: 4901056 (1990-02-01), Bellavia et al.
patent: 5115230 (1992-05-01), Smoot
patent: 5138304 (1992-08-01), Bronson
patent: 5420502 (1995-05-01), Schweitzer, Jr.
patent: 5515079 (1996-05-01), Hauck

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