Calculator

Claim 1

A CALCULATOR COMPRISING: A BASE; MEANS DEFINING A SINUOUS PASSAGEWAY IN SAID BASE AND HAVING BLIND ENDS, SAID BASE BEING TITABLE INTO A PLANE WHEREIN ALL PORTIONS OF SAID PASSAGEWAY ARE DOWNWARDLY SLOPED; MANUALLY OPERABLE GATE MEANS MOVABLY MOUNTED IN SAID BASE FOR SELECTIVELY INTERSECTING SAID PASSAGEWAY SO AS TO SELECTIVELY OPEN AND CLOSE SAID PASSAGEWAY; A PLURALITY OF EQUALLY DIMENSIONED ROLLABLE MEMBERS RESIDING IN AN UPPER PORTION OF SAID PASSAGEWAY AND ARRANGED IN SINGLE FILE THEREIN, SAID ROLLABLE MEMBERS BEING GRAVITATIONALLY BIASED TOWARDS SAID GATE MEANS IN RESPONSE TO TILTING OF SAID BASE INTO SAID PLANE; AND REMOVABLE STOP MEANS SELECTIVELY POSITIONABLE IN SAID PASSAGEWAY IN UPWARDLY SPACED RELATIONSHIP TO SAID GATE MEANS AND SPACEABLE IN INCREMENTS OF SAID DIMENSION OF SAID ROLLABLE MEMBERS FOR ARRESTING MOVEMENT OF A SELECTIVE ROLLABLE MEMBER RESIDING IN SAID UPPER PORTION OF SAID PASSAGEWAY, WHEREBY ROLLABLE MEMBERS POSITIONED BETWEEN SAID GATE MEANS AND SAID STOP MEANS ARE GRAVITATIONALLY BIASED TO ROLL DOWNWARDLY IN SAID PASSAGE AND TOWARD THE LOWERMOST OF SAID BLIND ENDS IN RESPONSE TO ACTUATION OF SAID GATE MEANS TO OPEN SAID PASSAGEWAY, SAID CALCULATOR ALSO INCLUDING INDICATOR MEANS IN SAID BASE AND SELECTIVELY OPERABLE IN RESPONSE TO ACTUATION OF SAID GATE MEANS FOR INDICATING THE NUMBER OF ACTUATIONS OF SAID GATE MEANS.