(19)
(11) EP 0 307 372 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.01.1990 Bulletin 1990/03

(43) Date of publication A2:
15.03.1989 Bulletin 1989/11

(21) Application number: 88830360.9

(22) Date of filing: 07.09.1988
(51) International Patent Classification (IPC)4: H01C 3/12
(84) Designated Contracting States:
DE FR GB

(30) Priority: 11.09.1987 IT 2188787

(71) Applicant: TELEMA S.P.A.
I-29020 Torre di Quarto (Piacenza) (IT)

(72) Inventor:
  • Fornari, Giovanni
    Milano (IT)

(74) Representative: Rapisardi, Mariacristina, Dr. Proc. 
STUDIO TECNICO LEGALE RAPISARDI, Largo V Alpini 15
20145 Milano
20145 Milano (IT)


(56) References cited: : 
   
     
    Remarks:
    The title of the invention has been amended (Guidelines for Examination in the EPO, A-III, 7.3).
     


    (54) Electric power resistor


    (57) The electric power resistor (1) particularly usable for electric resistances in general comprises a metallic plate (2) which has a plurality of cutouts (4,5) defining a plurality of non-encapsulated and mutually co-planar coils (3); the cutouts are arranged symmetrically with respect to the metallic plate and have, at their ends, an expanded region (6) having a substantially circular configuration adapted to allow an increase in the cross section affected by the flow of current between one coil and the next, drastically reducing the temperature of the so-called "hotpoints" together with the uniform longitudinal expansion of said metallic plate.







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