Automatic dialer

Claim 1

An automatic dialer having a manually selectable dial address code and comprising: a. A plurality of single pole switches each having a selector with at least ten manually selectable positions, the corresponding positions of each switch being interconnected to form a unified output, each switch settable at positions corresponding to the numbers in the dial address code; b. a switch interrogation means for sequentially applying a first selected logic level to each one of said selectors; c. a position interrogation means having a plurality of outputs for sequentially applying a second selected logic level at each of its outputs; D. a pair of dialing contacts, and pulser clock means for simultaneously periodically operating said pair of dialing contacts and triggering the advance of said position interrogation means; e. a coincidence recognition gate having a plurality of pairs of inputs, one input of each pair connected to a different one of at least nine of said unified switch output and the other inputs of each pair connected to a different one of the output of said position interrogation means said recognition gate providing a third output logic level for triggering the advance of said switch interrogation means, for resetting said position interrogation means and for temporarily inhibiting said pulser means all in response to the coincidence of said first logic level from said switch interrogation means and a second logic level from said position interrogation means; and f. logic circuit means for initiating operation of said pulser prior to interrogation of the switch positions and for resetting said switch interrogation means after dialing is completed, including 1. an on/off memory means including a flip-flop having a first state corresponding to a stop dialing instruction and a second state corresponding to a start dialing instruction, its output being connected for resetting said switch interrogation means in response to a stop state; 2. digital logic gates having inputs connected to said on/off memory means, said temporary coincidence memory, and said pulser and an output connected to the reset of said position interrogation means and to said enabling gate for preventing reset of said position interrogation means when said on/off memory means is in a stop state, for resetting said position interrogation means when simultaneously said on/off memory is in its start state said temporary coincidence memory is actuated and said dialer contacts are closed and for resetting said position interrogation means when said on/off memory switches from a stop state to a start state.