Bidirectional counter adapted for receiving plural simultaneous input signals

Claim 1

APPARATUS FOR ADAPTING A BIDIRECTIONAL COUNTER HAVING A COUNTING INPUT TO SIMULTANEOUSLY ACCEPT TWO INPUTS REPRESENTING OPPOSITE ALGEBRAIC SIGNS COMPRISING: MEANS FOR GENERATING MUTUALLY EXCLUSIVE CLOCK PULSES AT FIRST AND SECOND OUTPUTS THEREOF, MEANS CONNECTING SAID CLOCK PULSE GENERATOR MEANS TO SAID BIDIRECTIONALD COUNTER FOR ALTERNATELY SWITCHING SAID COUNTER TO OPPOSITE COUNTING MODES, FIRST AND SECOND BISTABLE MEANS EACH HAVING A FIRST INPUT FOR TRIGGERING SAID BISTABLE MEANS TO ITS FIRST STABLE STATE, A SECOND INPUT FOR TRIGGERING SAID BISTABLE MEANS TO ITS SECOND STABLE STATE, AND AN OUTPUT FOR PROVIDING AN OUTPUT PULSE WHEN SAID BISTABLE MEANS CHANGES FROM ITS FIRST TO SECOND STABLE STATE, MEANS FOR CONNECTING AN ADD INPUT TERMINAL TO THE FIRST INPUT OF SAID FIRST BISTABLE MEANS, MEANS FOR CONNECTING A SUBTRACT INPUT TERMINAL TO THE FIRST INPUT OF SAID SECOND BISTABLE MEANS; MEANS FOR CONNECTING THE FIRST AND SECOND OUTPUTS OF SAID CLOCK PULSE GENERATOR MEANS TO RESPECTIVE SECOND INPUTS OF SAID FIRST AND SECOND BISTABLE MEANS, AND MEANS FOR CONNECTING THE OUTPUTS OF SAID FIRST AND SECOND BISTABLE MEANS TO THE COUNTING INPUT OF SAID BIDIRECTIONAL COUNTER.