Electrical timing circuit

Claim 1

AN ELECTRICAL TIMING CIRCUIT COMPRISING TIME BASE MEANS FOR PROVIDING A SERIES OF ELECTRICAL PULSES, ONE FOR EACH PREDETERMINED TIME INTERVAL, READ-OUT MEANS HAVING A PLURALITY OF INPUTS, THE ENERGIZATION OF EACH INPUT CAUSING THE DISPLAY OF A DIGIT CORRESPONDING TO THE ENERGIZED INPUT, SWITCHING MEANS RESPONSIVE TO SAID PULSES AND HAVING TWO LEVELS OF CONTACTS, ONE IN EACH LEVEL BEING CLOSED FOR EACH PULSE APPLIED TO SAID SWITCHING MEANS, SAID CONTACTS IN EACH LEVEL BEING CLOSED IN SEQUENCE FOR SUCCESSIVE PULSES APPLIED TO SAID SWITCHING MEANS, MEANS CONNECTING THE INPUTS OF EACH OF SAID READ-OUT MEANS TO SAID LEVELS IN REVERSE ORDERS, AND SELECTOR MEANS SELECTIVELY ENERGIZING ONE OF SAID LEVELS, THEREBY PROVIDING DIGITAL DISPLAYS WHICH ARE A FUNCTION OF TIME AND SAID SELECTED LEVELS.