Patent
1976-07-30
1978-03-21
Claffy, Kathleen H.
179 81C, 179 84T, H04M 172
Patent
active
040805174
ABSTRACT:
Apparatus for enabling a blind person to determine the status of a plurality of telephone lines from the illumination condition of signal lamps associated therewith which respectively indicate the "ON", "OFF", "RING" or "HOLD" status of each line. Photosensors sense the illumination condition of each lamp and provide first signals in response thereto. The apparatus sequentially and repetitively scans the photosensors and the resultant sequentially appearing first signals are serially and repetitively converted to digitally coded signals which are serially read-into storage means. Means are provided for sequentially and repetitively generating a plurality of audio tone signals respectively having progressively different frequencies, each tone signal corresponding to a particular line. The coded signals are serially read-out of storage at the rate of the tone signal generation and are serially decoded. The tone signals are coupled to audio output means in response to predetermined ones of the decoded signals so that a predetermined condition of a particular lamp is indicated by an audible tone of a particular tone duration.
REFERENCES:
patent: 3005053 (1961-10-01), Schmidt
patent: 3234337 (1966-02-01), Schuyler
patent: 3665111 (1972-05-01), Schieser
Moricca Larry S.
Zaker Gregory A.
Claffy Kathleen H.
Inventive Industries, Inc.
Myers Randall P.
LandOfFree
Audio sensory apparatus and method for monitoring indicator lamp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Audio sensory apparatus and method for monitoring indicator lamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio sensory apparatus and method for monitoring indicator lamp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-571821