Control apparatus for advancing web of filter medium through a filtering zone

• US 3,175,775 A
• Filed: 07/24/1963
• Issued: 03/30/1965
• Est. Priority Date: 07/24/1963
• Status: Expired due to Term

• Current Assignee: Continental Filter Corporation
• Original Assignee: James E. Wooldridge, Oscar A. Wurtenberg
• Inventors: Wurtenberg, Oscar A., Wooldridge, James E.
• Application Number:
  US04/297,317
• Time in Patent Office: 615 Days
• US Class Current: 242/534
• CPC Class Codes: B01D 46/18 Particle separators, e.g. dust precipitators, using filtering belts
• CPC Class Codes: Y10S 55/34 Indicator and controllers

Claims

1. IN A CONTROL APPARATUS FOR ADVANCING A WEB OF FILTER MEDIUM IN AN AIR FILTER HAVING A REWIND ROLL FOR STORING THE SPENT WEB FED THROUGH THE FILTERING ZONE AND A MOTOR FOR DRIVING SAID ROLL;

THE IMPROVEMENT COMPRISING, A SELFRESETTING TIMER HAVING A TIMER MOTOR, A SWITCH-OPERATING MEANS ACTUATED IN DEPENDENCE UPON THE LINEAR ADVANCE OF SAID WEB, A FIRST SWITCH ACTUATED BY SAID MEANS AND MOVABLE BETWEEN A NORMAL FIRST POSITION ESTABLISHING A TIMER MOTOR CIRCUIT AND A SECOND POSITION ESTABLISHING A CIRCUIT TO SAID ROLL-DRIVING MOTOR AND SIMULTANEOUSLY INTERRUPTING THE TIMER MOTOR CIRCUIT, SAID FIRST-SWITCH SERVINT TO CONDUCT CURRENT WHEN OCCUPYING EACH OF ITS RESPECTIVE FIRST AND SECOND POSITIONS, AND A SECOND SWITCH ACTUATED BY SAID TIMER AND MOVABLE BETWEEN A FIRST POSITION ESTABLISHING A STARTING CIRCUIT TO SAID ROLL-DRIVING MOTOR AND A NORMAL SECOND POSITION INTERRUPTING SAID STARTING CIRCUIT, SAID FIRST SWITCH BEING ARRANGED TO OCCUPY SEQUENTIALLY ITS FIRST POSITION CORRESPONDING TO A CONDITION OF REST OF SAID WEB WHILE SAID SECOND SWITCH IS OCCUPYING ITS RESPECTIVE SECOND POSITION PRIOR TO ESTABLISHING SAID STARTING CIRCUIT, THEN TO MOVE TO AND OCCUPY ITS SECOND POSITION CORRESPONDING TO A CONDITION OF ADVANCING MOVEMENT OF SAID WEB AFTER SAID SECOND SWITCH HAS MOVED TO ITS RESPECTIVE SECOND POSITION TO ESTABLISH SAID STARTING CIRCUIT, AND THEN TO RETURN TO ITS FIRST POSITION WHILE SAID SECOND SWITCH IS AGAIN OCCUPYING ITS RESPECTIVE SECOND POSITION, SAID TIMER UPON INTERRUPTION OF ITS MOTOR CIRCUIT AUTOMATICALLY RESETTING ITSELF FOR THE NEXT CYCLE OF WEB ADVANCE AND RETURNING SAID SECOND SWITCH TO ITS SECOND POSITION.