Calculator pushbutton format attachment for pushbutton telephone

Details Calculator pushbutton format attachment for pushbutton telephone Calculator pushbutton format attachment for pushbutton telephone

1981-05-26

1983-05-03

Rubinson, G. Z.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

179 90K, 200331, 200332, H04M 123, H01H 320

Patent

active

043821626

ABSTRACT:
A telephone attachment is provided for fitting over the keyboard of a pushbutton telephone for converting from the telephone pushbutton format to a calculator pushbutton format. The attachment design includes a plurality of u-shaped levers in contact with several attachment-mounted pushbuttons arranged in a calculator format. The individual levers are so disposed within the attachment that they depress correspondingly-numbered telephone pushbuttons when the calculator format pushbuttons are depressed. Through the use of the attachment, a telephone user operates a pushbutton telephone using the calculator pushbutton format.

REFERENCES:
patent: 3557311 (1971-01-01), Goldstein
patent: 3627936 (1971-12-01), Cullen
patent: 3778553 (1973-12-01), Rackman
patent: 3995123 (1976-11-01), Wilson
patent: 4002855 (1977-01-01), Schiffman
patent: 4063046 (1977-12-01), Schiffman et al.
patent: 4296291 (1981-10-01), Johnson
Radio & Electronics (USA), vol. 48, No. 6, Jun. 1977; pp. 38-41 & 80-82, "Pushbutton Dialer with Memory" by Dick Feinwell.

Affiliated with

Also associated with

Rating

Calculator pushbutton format attachment for pushbutton telephone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Calculator pushbutton format attachment for pushbutton telephone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calculator pushbutton format attachment for pushbutton telephone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1209653