Switching circuits

• US 3,089,082 A
• Filed: 01/10/1961
• Issued: 05/07/1963
• Est. Priority Date: 01/10/1961
• Status: Expired due to Term

• Current Assignee: Larry L. Little
• Original Assignee: Larry L. Little
• Inventors: Little, Larry L.
• Application Number:
  US04/081,785
• Time in Patent Office: 847 Days
• US Class Current: 323/297
• CPC Class Codes: B03C 3/68 Control systems therefor electricity supply or control systems for cleaning the electrodes B03C3/746, B03C3/763
• CPC Class Codes: Y10S 323/903 Precipitators

Claims

1. A SYSTEM FOR AUTOMATICALLY ADJUSTING THE IMPEDANCE IN SERIES WITH A LOAD IN ORDER TO COMPENSATE FOR ELECTRICAL DISTURBANCES IN THE LOAD WHICH REACH A PREDETERMINED LEVEL AND FREQUENCY OF OCCURENCE, SAID SYSTEM COMPRISING:

FIRST MEANS IN CIRCUIT WITH THE LOAD FOR DETECTING ELECTRICAL DISTURBANCES WHICH EXCEED SAID PREDETERMINED LEVEL;

A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES FOR RECEIVING SAID DETECTION OUTPUT SIGNAL OF SAID FIRST MEANS AT ITS BASE ELECTRODE;

A STORAGE CAPACITOR COUPLED TO THE COLLECTOR-TO-EMITTER PATH OF SAID TRANSISTOR;

MEANS IN CIRCUIT WITH SAID TRANSISTOR FOR PROVIDING A RELATIVELY FAST RATE OF CHARGING FOR SAID CAPACITOR THROUGH THE RELATIVELY LOW IMPEDANCE COLLECTOR-TO-EMITTER PATH OF SAID TRANSISTOR;

MEANS IN CIRCUIT WITH SAID TRANSISTOR FOR PROVIDING A RELATIVELY SLOW DISCHARGING FOR SAID CAPACITOR THROUGH THE RELATIVELY HIGH BASE-EMITTER PATH THROUGH SAID TRANSISTOR;

AND MEANS RESPONSIVE TO THE SIGNAL WHICH IS STORED IN SAID CAPACITOR FOR PRODUCING AN IMPEDANCE CONTROL SIGNAL.