(19)
(11) EP 0 805 505 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.11.1997 Bulletin 1997/47

(43) Date of publication A2:
05.11.1997 Bulletin 1997/45

(21) Application number: 97111214.9

(22) Date of filing: 08.03.1993
(51) International Patent Classification (IPC)6: H01Q 1/12
(84) Designated Contracting States:
DE ES FR GB IT SE

(30) Priority: 08.04.1992 GB 9207620

(62) Application number of the earlier application in accordance with Art. 76 EPC:
93905538.0 / 0635165

(71) Applicant: BSH INDUSTRIES LIMITED
Swinton, Manchester M27 2AU (GB)

(72) Inventors:
  • Easter, Brian
    Llangefni, Gwynedd LL77 7RP (GB)
  • Kropielnicki, Jerzy Jacek
    Knutsford, Cheshire WA16 9DZ (GB)
  • Twort, Keith Jeremy
    Stockport, Cheshire SK2 6BN (GB)

(74) Representative: Hamilton, Alistair et al
Mewburn Ellis, York House, 23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB)

 
Remarks:
This application was filed on 03 - 07 - 1997 as a divisional application to the application mentioned under INID code 62.
 


(54) Coil construction


(57) A bifilar soil construction is used for isolating radio signals picked up by a motor vehicle window heating element from the power supply circuit for the heating element. The coil construction has two separate windings (9, 10) which are arranged bodily alongisde each other. In one embodiment there is an inner cylindrical winding (9) within and in contact with an outer cylindrical winding (10), and a two part pot core (15, 16) is clamped within and around the windings 9, 10). In another embodiment, the coils are flat, and disposed one on top of the other.






Search report