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Патент USA US2137573

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Nov. 22,_ 1938.
L. KAMENAROVIÓ
2,137,573
SCREW AND NUT DEVICE
Filed March 19, 1937
7.694,3
/
W/
IHM
FL’- .4
2,137,573
Patented v Nov. 22, 1938
v UNITED
STATES
_
PATENT OFFICE
2,137,573
soEEw AND NUT DEVICE
Leone Kamenarovic, Milan, Italy, assignor to
Fabbrica. Italiana Magneti Mar-‘elli Società
Anonima, Milan, Italy, a corporation of Italy
Application March 19, 1937, Serial No. 131,970
In Italy March 28, 1936
(Cl. ’I4-424.8)
6 Claims.
This invention has for its object a holder for
pillars 6 at the sides of their open portions 6"
an inductance coil> having a magnetic core, par
and said laminae are coextensive with the axis
ticularly for high frequency electric currents, of
of the Winding 3.
The top wall I' of body I has slots ß along the
edges of said laminae ‘I adjacent thereto, to make 5
said` laminae freely yieldable with respect to
the kind in which a section of said core is ad
5 justable for varying the inductance value of
said coil.
v
‘
- In known holders of the above class the ad
wall I’ and to holder body I; said laminae ‘I are
justable section of the core is connected with the » provided each with a rib 'I' along its middle
other section thereof or with supporting means
10 for said core, by a screw engagement which pro
' vides for adjustment of said adjustable section;
however objections are found in respect of the
mounting of said adjustable core section because
difficulties are found in securing in a simple
l5 manner, a mounting which provides for ad
justing the adjustable core section without un
due effort and at the same time secures a fast
engagement of said section in its adjusted po
sition.
In accordance with this invention the adjust
able core section is screw engaged in a seat pro
- vided by screw-threaded parts which are sep
arated from each other and are carried by
yieldable members supported along edges there
g5 of extending in a direction parallel to the axis
of said seat and core section adjustable therein.
Twov embodiments of the present invention are
illustrated by way of example on the annexed
drawing and
30
Figure 1 is a vertical section of a holder of this
invention with the coil and adjustable core
therein in section on line I-I of Fig. 3;
Figure 2 is a side elevation of said holder,
Figure 3 is a top plan view thereof, and
35
Figure 4 is a top plan view of a modified em
bodiment.
In the embodiment illustrated in Figs. 1_3,
said holder includes a body I made` of insulating
material and having perforated lugs 2 for fas
40 tening it on a support; said body encloses a wind
ing 3 located within two opposite channel rings
4 and 5 which are made of a sintered >ferromag
45
longitudinal line and sections of a screw thread
are cut in said ribs ï.' the whole of the screw- 1g
threaded portions thus obtained providing a sec
tional nut.
.
.
An adjustable core section 9, which is made of
sintered ferromagnetic material, is mounted to
slide in the central bore of the mantle core ß, 15
5 and is engaged in a sleeve Ill which is screw
threaded on its outer surface and is screw-en
gaged in the screw-threaded portions >'I' of the
laminae l; said sleeve I0 has grooves Il for its
engagement by a screw-driver.
In the described holder in view of the yielding
or resilient character of the laminae 'I-‘l’ which
in their whole provide a screw-threaded seat for
the movable- section 9-I0 of the core, the said
movable section may be easily adjusted with respect to the holder and mantle core d--ä lo
cated therein; on the other hand said adjustable
section 9-I0 is satisfactorily fastened in any
adjusted position it' has. been carried into be
cause the yielding and somewhat resilient laminae l are supported along the extensive extent
of their side edges lying in the direction of the
said screwthreaded seat and they evenly engage
the adjustable section I0, 9 over their screw
threaded portions, a satisfactory engagement
being thus secured along the full extent of the
gc
25
30
35
cooperating parts.
The embodiment illustrated in Fig. 4 is similar
to the above described one, but it includes only
two facing screw-threaded portions 1', 1' which 40
are provided in laminae 1; the laminae 'I are free
fromthe transverse wall I' of the holder I by
netic material and in their whole provide a hol
effect of slots 8 therein and are supported -by ar
low mantle core.
cuated intermediate portions 6' connected with
Hollow pillars 6 rise from the top wall I’ `of the
body l. Said pillars extend substantially in the
said top wall I’.
45
The described holder conveniently consists of
an integral member made of insulating material
having a proper resilient or yielding material, but
of ‘course it may be made of any/appropriate ma
terial and may consist of a number of separate 50`
direction of the axis of the winding 3 and are
arranged each in register with one vertex of a
polygon having its centre on said winding axis;
50 further said pillars are open in their region fac
ing the winding axis, as shown at 6".
Intermediate the pillars »6 oi each pair pro
vided by adjacent ones, laminae 1 are located;
the axially extending edges of said laminae ‘I
ß are connected with adjacent edges of saidv hollow
parts properly interconnected.
What I claim as my invention and desire to
secure by United States Letters Patent is:
1. A holder .for an adjustable screw threaded
member, comprising a body, parts extending from 55
2
2,137,573
said body parallel with and spaced from each
spaced from each other around an axis inter
each lying in a plane parallel with said axis and
having edges coextensive and connected with
mediate them, laminae separate from said body
two adjacent ones of said parts, and screw
threaded means on the inner faces of said lam
inae providing a sectional screw-threaded seat
and each lying in a plane parallel with said axis
and having edges coextensive and connected with
two adjacent ones of said parts, and screw
threaded means on the inner faces of said lam
from each other around an axis intermediate
inae providing a sectional screw-threaded seat in
the space enclosed by said laminae, said seat
being adapted to receive said adjustable member.
5. A holder for an adjustable screw-threaded
member, comprising a body, parts integral with
and extending from said body parallel with and
them, lai iinae each lying in a plane parallel with
said axis and having edges coextensive and con
nected v.' th the lateral edges of two adjacent
ones of .aid parts, and screw-threaded means
mediate them, laminae separate from said body
and each lying in a plane paraHel with said axis
and having edges coextensive and integral with
in the space enclosed by said laminae, said seat
being adapted to receive said adjustable member.
2. A holder for an adjustable screw-threaded
member, comprising a body, channel section parts
extending from said body parallel with and spaced
spaced from each other around an axis inter
on the ir ner faces of said laminae providing a
sectional screwthreaded seat in the space en
two adjacent ones oi said parts, and screw
closed by said laminae, said seat being adapted
to receive said adjustable member.
inae providing in the space enclosed by said lam
inae a sectional screw-threaded seat adapted to
receive said adjustable member.
6. A holder for an adjustable screw-threaded
member, comprising a body of insulating ma»
3. A holder lor an adjustable screw-threaded
member, comprising a body, channel section parts
extending from said body parallel with and spaced
from each other around an axis intermediate
them, said parts „being open towards said inter
mediate axis, laminae each lying in a plane par
allel with said axis and having edges coextensive
and connected with the lateral edges of two ad
jacent ones of lsaid parts, and screw-threaded
means on the inner faces of said laminae pro
viding a sectional screw-threaded seat in the
space enclosed by said laminae, said seat being
adapted to receive said adjustable member.
35
and extending from said body parallel with and
other around an axis intermediate them, laminae
4. A holder for an adjustable screw-threaded
member, comprising a body, parts integral with
threaded means on the inner faces of said lam
terial, parts integral with and extending from
said body parallel with and spaced from each
other around an axis intermediate them, laminae
separate from said body and each lying in a
plane parallel with said axis and having edges
cocxtensíve and integral with two adjacent ones 30
of said parts, and screw-threaded means on the
inner faces of said laminae providing in the
space enclosed by said laminae a sectional screw
threaded seat adapted to receive said adjustable
member.
35
LEONE KAMENAROVIÓ.
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