COMBINATION TELEPHONE AND CALCULATOR
First Claim
1. In a communications device such as a telephone including a housing, input-output lines, a numeric keyboard providing seven separate outputs as inputs to a dual tone generator to create 12 separate tone pairs, the improvement permitting dual use of the telephone keyboard for tone dialing and as an input to a calculator comprising:
- an electronic calculator positioned within the telephone housing and including numeric inputs from zero to nine plus function inputs;
switch means disengaging the seven outputs of the keyboard from the tone generators and providing the seven separate outputs as inputs to a decoding matrix; and
a decoding matrix for decoding the seven outputs into twelve outputs Representative of the numeric keyboard designations and applying the decoded outputs as inputs to the calculator.
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Accused Products
Abstract
Improvements are disclosed to a touch tone telephone which permits the touch tone keyboard of the telephone to serve the dual function as an input device to a calculator disposed within the telephone housing. The seven outputs from the touch tone keyboard are disengaged from the tone generators and applied as inputs to a decoding matrix which decodes the 12 buttons into their respective numeric representations and applies the 12 inputs as the inputs to a calculator.
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Citations
2 Claims
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1. In a communications device such as a telephone including a housing, input-output lines, a numeric keyboard providing seven separate outputs as inputs to a dual tone generator to create 12 separate tone pairs, the improvement permitting dual use of the telephone keyboard for tone dialing and as an input to a calculator comprising:
- an electronic calculator positioned within the telephone housing and including numeric inputs from zero to nine plus function inputs;
switch means disengaging the seven outputs of the keyboard from the tone generators and providing the seven separate outputs as inputs to a decoding matrix; and
a decoding matrix for decoding the seven outputs into twelve outputs Representative of the numeric keyboard designations and applying the decoded outputs as inputs to the calculator.
- an electronic calculator positioned within the telephone housing and including numeric inputs from zero to nine plus function inputs;
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2. Communications device of claim 1 wherein the decoding matrix includes 12 separate dual input nand gates.
Specification
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- Resources
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Current AssigneeBernard A. Bender
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Original AssigneeBernard A. Bender
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InventorsBender, Bernard A.
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Primary Examiner(s)Claffy, Kathleen H.
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Assistant Examiner(s)D'Amico, Thomas
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Application NumberUS05/383,915Time in Patent Office561 DaysField of Search179/9K,9AU,9BD,9B,81R,84R,2DP 340/365R 235/145,146,156US Class Current379/110.01CPC Class CodesH04M 1/50 by generating or selecting ...
