Touchpad dialer for mobile telephones
AssigneeAmerican Communication Systems
InventorC. Paul Milkes
Life of this patent
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Abstract
A touchpad dialer for mobile telephones comprising a touchpad keyboard, a dial pulse relay, a means for converting signals from the keyboard to control signals for the dial pulse relay, a tone start, and a means for actuating the tone start relay before the dial pulse relay is actuated for a predetermined time after the control signals to the dial pulse relay cease. Both the dial pulse relay and the tone start relay are electrically coupled to the control head of a mobile telephone.
Claims11
A touchpad dialer for mobil telephones having a control head and wherein dial pulses are transmitted to a central office as interruptions in a tone comprising:
- a touchpad keyboard means having a plurality of keyboard buttons, each of said buttons being assigned one alpha-numeric symbol, said keyboard means generating an output signal when one of said buttons is depressed, said output signal being an electrical representation of the alpha-numeric symbol assigned to said button;
- a dial pulse control means coupled to said control head of said mobil telephone for interrupting said tone in response to a control signal;
- a means for converting said output signals from said keyboard to said control signals for said dial pulse control means;
- a tone start control means coupled to said control head of said mobil telephone for turning on said tone;
- and
- a means coupled to said converting means for actuating said tone start control means some predetermined time before said control signals are transmitted to said dial pulse control means and for keeping said tone pulse control means actuated for some predetermined time after said control signals to said dial pulse control means cease.
Dependencies are inferred from the claim text.