Appeal No. 96-4196
Application No. 08/239,010
polycrystalline ferrite material and a winding
connected to the supply device,
the supply device including means for energizing
said coil for inducing a high-frequency magnetic
field which starts and maintains a discharge in
the discharge space, characterized in that the
losses in the core, when measured at room
temperature in an alternating magnetic field
with a frequency of 3 MHz and at a magnetic flux
density of 10 mT, are at most 150 mW/cm .3
10. An electrodeless low-pressure discharge lamp,
comprising:
a discharge vessel enclosing a discharge space in a
gastight manner, an ionizable filling in said discharge space,
and a coil for inducing a high-frequency magnetic field which
maintains a discharge in the discharge space, said coil
including a sintered core of polycrystalline ferrite material
and a winding around said core, characterized in that:
the losses in the core, when measured at room temperature
in an alternating magnetic field with a frequency of 3 MHz and
at a magnetic flux density of 10 mT, are at most 150 mW/cm3
The references relied on by the examiner are:
Anderson 3,521,120 July 21,
1970
Johnson et al. (Johnson) 5,138,546 Aug.
11, 1992
Philips 974,853 Nov. 11,
1964
(British patent application)
Claims 1 through 7, 10 through 13, 15 through 17, 19
through 25, 28 and 30 stand rejected under 35 U.S.C. § 103 as
3
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