Electrical apparatus for determining moisture content by measurement of dielectric loss utilizing an oscillator having a resonant tank circuit
First Claim
Patent Images
1. APPARATUS FOR MEASURING THE MOISTURE CONTENT OF A TEST MATERIAL, COMPRISING:
- A CLASS C ELECTRONIC OSCILLATOR INCLUDING AN INDUCTANCE AND A CAPACITANCE ELECTRICALLY INTERCONNECTED INTO A RESONANT TANK CIRCUIT, SAID TANK CIRCUIT BEING COUPLED TO A TRANSISTOR, SAID INDUCTANCE HAVING A PLURALITY OF TAPPED AUTOTRANSFORMER OUTPUT CONNECTIONS;
CAPACITIVE ELECTRODE MEANS AND SWITCHING MEANS FOR CONNECTING A TEST MATERIAL ACROSS SELECTED PAIRS OF SAID PLURALITY OF TAPPED AUTOTRANSFORMER OUTPUT CONNECTIONS TO VARY THE POWER LOADING OF SAID OSCILLATOR AND THE ELECTRICAL CURRENT PASSING THROUGH SAID TRANSISTOR;
A SUPPLEMENTARY CAPACITANCE CONNECTED ACROSS SAID SELECTED OF SAID TAPPED OUTPUT CONNECTIONS OF SAID INDUCTANCE, THE MAGNITUDE OF SAID SUPPLEMENTARY CAPACITANCE BEING SUFFICIENTLY GREAT TO MINIMIZE THE SENSITIVITY OF SAID OSCILLATOR TO CAPACITANCE VARIATIONS IN SAID TEST MATERIAL;
SENSING MEANS FOR DERIVING A SIGNAL INDICATIVE OF THE MAGNITUDE OF SAID CURRENT PASSING THROUGH SAID TRANSISTOR;
INDICATING MEANS ELECTRICALLY CONNECTED TO SAID SENSING MEANS FOR REGISTERING THE MOISTURE CONTENT OF SAID TEST MATERIAL AS A FUNCTION OF THE CURRENT PASSING THROUGH SAID TRANSISTOR;
AND MEANS FOR AUTOMATICALLY VARYING THE SENSITIVITY OF SAID INDICATING MEANS TO CORRESPOND TO THE PARTICULAR TAPPED OUTPUT CONNECTIONS ACROSS WHICH SAID ELECTRODE MEANS ARE CONNECTED.
1 Assignment
0 Petitions
Accused Products
23 Citations
1 Claim
-
1. APPARATUS FOR MEASURING THE MOISTURE CONTENT OF A TEST MATERIAL, COMPRISING:
- A CLASS C ELECTRONIC OSCILLATOR INCLUDING AN INDUCTANCE AND A CAPACITANCE ELECTRICALLY INTERCONNECTED INTO A RESONANT TANK CIRCUIT, SAID TANK CIRCUIT BEING COUPLED TO A TRANSISTOR, SAID INDUCTANCE HAVING A PLURALITY OF TAPPED AUTOTRANSFORMER OUTPUT CONNECTIONS;
CAPACITIVE ELECTRODE MEANS AND SWITCHING MEANS FOR CONNECTING A TEST MATERIAL ACROSS SELECTED PAIRS OF SAID PLURALITY OF TAPPED AUTOTRANSFORMER OUTPUT CONNECTIONS TO VARY THE POWER LOADING OF SAID OSCILLATOR AND THE ELECTRICAL CURRENT PASSING THROUGH SAID TRANSISTOR;
A SUPPLEMENTARY CAPACITANCE CONNECTED ACROSS SAID SELECTED OF SAID TAPPED OUTPUT CONNECTIONS OF SAID INDUCTANCE, THE MAGNITUDE OF SAID SUPPLEMENTARY CAPACITANCE BEING SUFFICIENTLY GREAT TO MINIMIZE THE SENSITIVITY OF SAID OSCILLATOR TO CAPACITANCE VARIATIONS IN SAID TEST MATERIAL;
SENSING MEANS FOR DERIVING A SIGNAL INDICATIVE OF THE MAGNITUDE OF SAID CURRENT PASSING THROUGH SAID TRANSISTOR;
INDICATING MEANS ELECTRICALLY CONNECTED TO SAID SENSING MEANS FOR REGISTERING THE MOISTURE CONTENT OF SAID TEST MATERIAL AS A FUNCTION OF THE CURRENT PASSING THROUGH SAID TRANSISTOR;
AND MEANS FOR AUTOMATICALLY VARYING THE SENSITIVITY OF SAID INDICATING MEANS TO CORRESPOND TO THE PARTICULAR TAPPED OUTPUT CONNECTIONS ACROSS WHICH SAID ELECTRODE MEANS ARE CONNECTED.
- A CLASS C ELECTRONIC OSCILLATOR INCLUDING AN INDUCTANCE AND A CAPACITANCE ELECTRICALLY INTERCONNECTED INTO A RESONANT TANK CIRCUIT, SAID TANK CIRCUIT BEING COUPLED TO A TRANSISTOR, SAID INDUCTANCE HAVING A PLURALITY OF TAPPED AUTOTRANSFORMER OUTPUT CONNECTIONS;
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneePenril Corporation
-
Original AssigneeJohn W. Lundstrom
-
InventorsLundstrom, John W.
-
Application NumberUS04/209,916Time in Patent Office1,401 DaysField of SearchUS Class Current324/668CPC Class CodesG01N 27/223 for determining moisture co...
