Apparatus for adapting multi-line telephone instrument for use b

Details Apparatus for adapting multi-line telephone instrument for use b Apparatus for adapting multi-line telephone instrument for use b

1976-02-13

1977-06-07

Claffy, Kathleen H.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

179 81C, 179 84L, 340407, H04M 172

Patent

active

040285022

ABSTRACT:
Apparatus for providing auditory and tactile recognition of a light signal associated with a line-selector pushbutton of a multi-line telephone instrument. A photocell is provided for sensing the light signal. An oscillator generates a sine wave voltage which is amplified and applied to excite a piezoelectric crystal into vibration in response to activation of the photocell. An auxiliary pushbutton is disposed in alignment with the line selector pushbutton so that manual depression of the auxiliary pushbutton actuates the line selector pushbutton. Vibration of the crystal in response to the light signal acts upon the auxiliary pushbutton to impart the vibration thereto so that the presence of a light signal is sensed by vibration of the auxiliary pushbutton.

REFERENCES:
patent: 3057965 (1962-10-01), Banks et al.
patent: 3234337 (1966-02-01), Schuyler
patent: 3250023 (1966-05-01), Benson
patent: 3585303 (1971-06-01), Chieffo
patent: 3665111 (1972-05-01), Schieser
patent: 3740446 (1973-06-01), Benson
"Sensicall", Bell Telephone Magazine, Winter 1965, p. 57.
"Bell System Aid to the Blind", Bell Labs Record, Jan. 1957, pp. 30 & 31.
"Switchboards for the Blind", Bell Labs Record, vol. 31, No. 6, June 1953, p. 220.
"Phones for the Deaf and Blind", Bell Telephone Magazine, vol. 50, No. 1, Jan/Feb. 1971.

Affiliated with

Also associated with

Rating

Apparatus for adapting multi-line telephone instrument for use b does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for adapting multi-line telephone instrument for use b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for adapting multi-line telephone instrument for use b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1238079