Distributor testing instrument

Claim 1

AN INSTRUMENT FOR TESTING DISTRIBUTORS FOR INTERNAL COMBUSTION ENGINES COMPRISING A SCALE, AN INDICATOR INCLUDING A GLOW TUBE MOUNTED FOR ROTATION IN EFFECTIVE RELATION WITH SAID SCALE, MEANS FOR ROTATING SAID INDICATOR AND THE SHAFT OF A DISTRIBUTOR UNDER TEST, A HIGH VOLTAGE DIRECT CURRENT SOURCE FOR ILLUMINATING SAID GLOW TUBE, A CONTROL CIRCUIT INCLUDING A LOW VOLTAGE DIRECT CURRENT SOURCE AND AN ELECTRON TUBE HAVING AN ANODE, CATHODE AND GRID MEANS, THE POSITIVE SIDE OF SAID LOW VOLTAGE DIRECT CURRENT SOURCE CONNECTED TO SAID GRID MEANS, ONE COOPERATING BREAKER POINT IN THE DISTRIBUTOR ADAPTED TO BE CONNECTED TO THE NEGATIVE SIDE OF SAID LOW VOLTAGE DIRECT CURRENT SOURCE AND THE OTHER COOPERATING BRAKER POINT ADAPTED TO BE CONNECTED TO SAID CATHODE WHEREBY SAID COOPERATING BREAKER POINTS ARE IN THE CIRCUIT OF SAID LOW VOLTAGE DIRECT CURRENT SOURCE SO THAT THE DISTRIBUTOR CAN BE TESTED WITHOUT REMOVING THE NORMAL DISTRIBUTOR CONDENSER AND WITHOUT HIGH VOLTAGE ARCING DAMAGE TO THE BREAKER POINTS, SAID ANODE CONNECTED TO THE POSITIVE SIDE OF SAID HIGH VOLTAGE DIRECT CURRENT SOURCE, THE TERMINALS OF SAID GLOW TUBE RESPECTIVELY CONNECTED TO THE NEGATIVE SIDE OF SAID HIGH VOLTAGE DIRECT CURRENT SOURCE AND SAID CATHODE, WHEREBY THE CLOSING OF SAID BREAKER POINTS APPLIES A POSITIVE BIAS ON SAID GRID MEANS, SAID GRID MEANS HAVING THE CONTROL CHARACTERISTICS OF CONNECTED-TOGETHER GRIDS IN A PENTAGRID CONVERTER SO WHEN SAID GRID MEANS HAS A POSITIVE BIAS IT CAUSES MASSIVE ELECTRON FLOW AND ABRUPT CONDUCTION THROUGH SAID ELECTRON TUBE, THEREBY EFFECTIVELY CONNECTING SAID HIGH VOLTAGE DIRECT CURRENT SOURCE ACROSS THE TERMINALS OF SAID GLOW TUBE TO CAUSE ABRUPT INTENSE ILLUMINATION OF SAID GLOW TUBE, THE OPENING OF SAID BREAKER POINTS REMOVING THE POSITIVE BIAS FROM SAID GRID MEANS WHEREBY THE ELECTRONS IN SAID MASSIVE ELECTRON FLOW FORM A MASSIVE SPACE CHARGE WHICH CAUSES SAID ELECTRON TUBE TO BECOME ABRUPTLY NON-CONDUCTING THEREBY COMPLETELY REMOVING HIGH VOLTAGE FROM THE TERMINALS OF SAID GLOW TUBE AND THEREBY ABRUPTLY EXTINGUISHING SAID GLOW TUBE, WHEREBY THE ROTATING GLOW TUBE TURNS ON AND OFF IN SYNCHRONISM WITH THE MOVEMENT OF SAID BREAKER POINTS AND FORMS LIGHT PATTERNS ON SAID SCALE.