Apparatus for controlling the tension in a flexible material as it is being wound onto or unwound from a drum

• US 3,233,397 A
• Filed: 07/02/1963
• Issued: 02/08/1966
• Est. Priority Date: 07/05/1962
• Status: Expired due to Term

• Current Assignee: Zbigniew Bonikowski
• Original Assignee: Zbigniew Bonikowski
• Inventors: ZBIGNIEW BONIKOWSKI
• Application Number:
  US04/292,376
• Time in Patent Office: 952 Days
• US Class Current: 57/13
• CPC Class Codes: B21C 1/12 Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
• CPC Class Codes: B21C 47/003 Regulation of tension or speed; Braking
• CPC Class Codes: B65H 23/1806 in reel-to-reel type web winding and unwinding mechanism, e.g. mechanism acting on web-roll spindle
• CPC Class Codes: B65H 2701/31 Textiles threads or artificial strands of filaments
• CPC Class Codes: B65H 59/38 by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
• CPC Class Codes: G11B 15/43 Control or regulation of mechanical tension of record carrier, e.g. tape tension

Claims

10. A LAPPING HEAD FOR APPLYING A FLEXIBLE INSULATING TAPE TO AN ELECTRIC CONDUCTOR COMPRISING (A) MEANS FOR ROTATING A PAD OF SAID TAPE AROUND SAID CONDUCTOR, (B) MEANS FOR GUIDING SAID TAPE FROM THE PAD ON TO THE CONDUCTOR, AND (C) A REVERSIBLE ELECTRIC MOTOR COUPLED TO THE PAD IN SUCH A WAY AS TO DRIVE THE PAD, (D) A SENSING DEVICE RESPONSIVE TO CHANGES IN TENSION OF THE INSULATING TAPE IN ITS PATH BETWEEN THE PAD AND THE CONDUCTOR, (E) A VARIABLE RESISTANCE COUPLED TO THE SENSING DEVICE IN SUCH A WAY THAT VARIATIONS IN THE RESPONSE OF SAID DEVICE VARY THE VALUE OF THE RESISTANCE, (F) A MULTI-STAGE HIGH GAIN D.C. AMPLIFIER CONSISTING ESSENTIALLY OF A SUCCESSION OF TRANSISTOR AMPLIFYING STAGES CONNECTED IN CASCADE HAVING THE VARIABLE RESISTANCE IN THE INPUT CIRCUIT OF THE LAST OF SAID STAGES AND HAVING THE OUTPUT CIRCUIT OF THE LAST OF SAID STAGES CONNECTED TO THE REVERSIBLE MOTOR TO SUPPLY SUBSTANTIALLY THE WHOLE CURRENT FOR AT LEAST ONE ELEMENT OF THE MOTOR, THE ELEMENTS CONSISTING OF THE ARMATURE AND FIELD, TO DRIVE THE MOTOR IN ONE DIRECTION WHEN THE VARIABLE RESISTANCE IS ABOVE A PREDETERMINED VALUE AND IN THE REVERSE DIRECTION WHEN IT IS BELOW SAID VALUE, WITH A TORQUE DEPENDENT ON THE VALUE OF SAID RESISTANCE, AND (G) A RESISTANCE/CAPACITANCE STABILISATION NETWORK, DESIGNED TO INHIBIT HUNTING IN THE SYSTEM, CONNECTED IN THE INPUT CIRCUIT OF THE FIRST OF SAID AMPLIFIER STAGES.