(19)
(11) EP 0 762 447 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.08.1997 Bulletin 1997/32

(43) Date of publication A2:
12.03.1997 Bulletin 1997/11

(21) Application number: 96202377.6

(22) Date of filing: 27.08.1996
(51) International Patent Classification (IPC)6: H01F 41/06
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 25.08.1995 US 519485

(71) Applicant: Embrec Corporation
Groton, Massachusetts 01450 (US)

(72) Inventors:
  • Rechsteiner, Emil B.
    Groton, Massachusetts 01450 (US)
  • Hidden, William P.
    Wenham, Massachusetts 01984 (US)
  • Henkel, Garry N.
    Nashua, New Hampshire 03063 (US)
  • Mercier, Wilfred
    Tyngsborough, Massachusetts 01879 (US)

(74) Representative: Horton, Andrew Robert Grant et al
BOWLES HORTON Felden House Dower Mews High Street
Berkhamsted Hertfordshire HP4 2BL
Berkhamsted Hertfordshire HP4 2BL (GB)

   


(54) Improved winding apparatus for winding gap-less cores for magnetic devices


(57) An improved winding apparatus for winding a length of an element onto a form includes: a first retention cylinder which in a first position retains a first end of the length of element against a first backstop cylinder; a second retention cylinder which in a first position retains a second end of the length of element against a second backstop cylinder; means for driving the retention and backstop cylinders to rotate the length of element in a first direction through the form; means for alternately, successively moving one of the first and second retention cylinders to its second, retracted position to release the innermost loop of element to cause it to be wound onto the form as the length of element rotates; and means for returning the moved retention cylinder to its first position after the innermost loop of element is released to retain the remaining loops of element.






Search report