Optical system for interrogation of the status of a switch

Details Optical system for interrogation of the status of a switch Optical system for interrogation of the status of a switch

1981-11-25

1984-01-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250227, G02B 2700

Patent

active

044292317

ABSTRACT:
A system (FIG. 1) for interrogating the ON-OFF status of an electrical switch (31) comprises a semiconductor body (4) containing a PN junction and means (5) for electrically connecting an auxiliary switch (32) coupled to the interrogated switch, or alternately (FIG. 2) the interrogated switch (32), across the PN junction. Light (7) of a first wavelength incident on the semiconductor body causes light of a second wavelength (11) to be emitted from the body when the switch is open (OFF), whereas no light is emitted from the body when the switch is closed (ON). Therefore, photoelectric detection of the emission vs. non-emission of light of the second wavelength from the semiconductor body indicates the OFF vs. ON status of the switch.

REFERENCES:
patent: 4202000 (1980-05-01), Carballes
patent: 4286171 (1981-08-01), Hara et al.
S. Larach, ed., "Photoelectronic Materials and Devices", pp. 6, 280-283, 1965.

Affiliated with

Also associated with

Rating

Optical system for interrogation of the status of a switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical system for interrogation of the status of a switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical system for interrogation of the status of a switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2347668