U.S. patent number 3,859,614 [Application Number 05/449,011] was granted by the patent office on 1975-01-07 for electrical coil assembly.
This patent grant is currently assigned to Siemens Aktiengesellschaft. Invention is credited to Egon Reithmaier.
United States Patent |
3,859,614 |
Reithmaier |
January 7, 1975 |
ELECTRICAL COIL ASSEMBLY
Abstract
An electrical coil assembly having cup core coils and a pair of
side flanges defining the coil member winding space and one of
these side flanges is radially wider than the other and exceeds the
circumference of the cup core coaxially surrounding the coil
member. The widened peripheral flange part is only connected with
the winding drum and has pliable metal studs fixed to the widened
flange part which are displaceable in a direction transverse to the
axis of the coil member.
Inventors: |
Reithmaier; Egon (Gauting,
DT) |
Assignee: |
Siemens Aktiengesellschaft
(Berlin & Munich, DT)
|
Family
ID: |
5874053 |
Appl.
No.: |
05/449,011 |
Filed: |
March 7, 1974 |
Foreign Application Priority Data
Current U.S.
Class: |
336/83; 336/198;
336/192 |
Current CPC
Class: |
H01F
17/043 (20130101); H01F 5/02 (20130101) |
Current International
Class: |
H01F
17/04 (20060101); H01F 5/02 (20060101); H01f
015/02 () |
Field of
Search: |
;336/83,212,192,198,208 |
Foreign Patent Documents
Primary Examiner: Kozma; Thomas J.
Attorney, Agent or Firm: Hill, Gross, Simpson, Van Santen,
Steadman, Chiara & Simpson
Claims
I claim as my invention:
1. An electrical coil assembly having cup core coils comprising a
winding drum having outwardly extending flanges formed at opposite
ends thereof for restriction of a core member winding space wherein
one of said flanges is relatively wider than the other and lies in
a plane transverse to the axis of said drum and exceeds the
circumference of the cup core coaxially positionable over the coil
member and wherein said widened flange provides openings for said
cup core and serves as a seat for connecting studs extending
through the flange and lying in an axis parallel to the axis of
said cup core, a pair of bridges interconnecting said widened
flange and said drum and providing the only means for
interconnecting the widened flange and said drum, wherein said cup
core extends over said drum and through the spaces between said
drum and said widened flange portion and wherein said
interconnecting studs are displaceable in a direction transverse to
the axis of said drum.
2. An electrical coil assembly constructed in accordance with claim
1 wherein said connecting studs are carried in a shouldered portion
of said flange which shouldered portion is displaced from the
surface of said widened flange serving as a restriction for one end
of the winding space of said drum and wherein said winding studs
can be bent transverse to the axis of said drum on said shouldered
support so as to lie below the plane of the remainder of said
widened flange.
3. An electrical coil assembly constructed in accordance with claim
2 wherein said pairs of bridges extend radially above said
shouldered portions of said flange providing means for guiding the
winding ends to said connecting studs.
Description
BACKGROUND OF THE INVENTION
This invention is directed to an electrical coil assembly including
a coil member carried within a cup core coil which coil member has
side flanges provided for the limitation of the coil member winding
space whereby one is radially wider than the other and exceeds the
circumference of the cup core which coaxially surrounds the coil
member. The widened flange defines openings for the cup core and
also serves as a means to support connecting studs for the ends of
the wire windings. The connecting studs are bendable but are
initially fitted in the widened flange in a direction parallel to
the axis of the coil member.
Coil members for cup core coils are required in large numbers for
use, for instance, as channel filter coils in carrier frequency
transmission systems. For the electrical connection of the coil
windings the winding ends are soldered to the connecting studs and
the studs have their ends turned away from the coil in openings of
conductor plates whereby the coil member is connected with a
carrier plate in mechanical fashion. Due to the large number of
required coils it has been found desirable to have the coil members
designed so that they can be wound automatically be mechanical
winding devices and to automatically be able to fix the winding
ends to the connecting studs.
SUMMARY OF THE INVENTION
In accordance with the present invention the widened flange herein
and above referred to and which is located outwardly of the cup
core is only connected with the inner flange part of the coil
member (that is with the winding drum) by pairs of bridges running
in a lateral direction and formed integrally with the winding drum
and with the widened flange. The bendable metal connecting studs
are fixed in the widened flange along its periphery and a shoulder
of that flange is displaced in an axial direction from the plane of
the flange itself whereby the ends of the pliable metal studs at
which the winding ends are fixed prior to winding of the coil
member can be bent in a direction transverse to the axis of the
coil member and below the plane of the widened flange itself
whereby unobstructed axis to the winding space of the coil may be
had.
In this manner an automatic connection of the winding ends at the
angular ends of the connecting studs is possible and subsequent
brazing of the winding ends to the connecting studs can be
effected.
One feature of the invention pertains to the arrangement wherein
the bridge pairs are extended outwardly so as to provide
projections or noses which overhang the axially displaced shoulder
supporting the connecting studs so that the winding ends can be
held between these pairs of noses or projections and kept out of
the cup core spaces by the winding drum and the enlarged flange.
This feature assures a secure guiding of the winding ends from the
winding spaces of the coil member to the connecting stud so that
during closure of the cup core over the coil member a winding wire
cannot be jammed, torn off or damaged. The projecting parts of the
coil member moreover make it possible to attach a plastic housing
between two such coil members in a simple manner with a conductor
plate by having the projections extend to corresponding recesses in
the base plate of a housing.
It is therefore an object of the present invention to provide a
coil member of the type herein described wherein the coil member
can be automatically wound and the winding ends can be
automatically fixed to connecting studs and wherein cup core coils
can be readily fitted over the coil member.
It is a further object of the invention to provide such a coil
assembly wherein the connecting studs can be bent over it at an
angle transverse to the axis of the coil forming a shouldered
support below the plane of one of the two flanges of the winding
drum thereby to give unobstructed access to the wire drum.
A still further object of the invention resides in the provision of
a coil assembly herein described wherein pairs of bridges run in a
direction transverse to the axis of the wire drum and project
slightly above the stud support shoulder to provide a means for
guiding the winding ends from the drum to the connecting studs
while maintaining the windings out of the cup core space.
These and other objects, advantages and features of the present
invention will be discussed in further detail with reference to the
drawing.
The drawing submitted herewith illustrates in perspective, exploded
fashion an electrical coil assembly constructed in accordance with
the principles of this invention.
With reference to the drawing, a spool type coil member 8 is shown
as having a winding drum 10 providing a winding space for accepting
the spirally wound wires 11. The winding space is defined at its
upper and lower ends by side flanges 9 and 1, respectively. The
side flanges and the winding drum itself consist of a plastic
injection molded part and all three elements are integral with one
another. The coil member 8 is designed so that it can be enclosed
by a cup core which is coaxial with it and which is shown in the
drawing as consisting of two core parts 12 and 13.
The lower flange 1 is coplaner with an enlarged flange portion 22
and is connected therewith by at least one pair of bridges 3 and
cooperates with the innermost lower flange 1 to define an annular
cup core opening 17. A stepped shoulder 15 is formed integrally
with the enlarged flange portion 22 but is displaced axially below
it and provides a support having a series of connecting pairs or
studs 5. The connecting studs normally extend in a direction
parallel to the axis of the winding core and are bendable in the
fashion shown by the left-hand most pair in the drawing. The
connecting studs 5 extend through the shoulder 15 and are adapted
to be electrically connected with a conductor plate.
Preferably, the innermost flange 1 is interconnected with the
enlarged flange portion 22 via two pairs of bridges 3 (only one
being visible in the drawing) and consequently the cup core half 13
is provided with only two slot-like recesses 14 which are
dimensioned so as to fit snugly over the bridge pairs. Likewise,
the thickness of the arcuate walls in cup core 13 corresponds to
the thickness of the slots 17.
In order to achieve unobstructed access to the winding space 10 of
the coil member during winding operation the studs 5 are supported
by the shoulder 15 which lies in a place displaced axially from the
surface of flange 22 so that when the studs are bent over as shown
in the drawing the entire stud end will lie below the plane of
flange 22.
The bridges 3 of each bridge pair provide restricted wire guide
channels 4 for routing the wires from the winding position to the
connecting studs in order to assure that no wires will accidentally
be positioned within the area of the arcuate core opening 17 in
order to assure that the wire will not be damaged when the two core
parts are mated together.
In addition, the bridges 3 have their outermost ends extending a
small amount above the shoulder 15 (to define small noses or
projections) so that the wire ends will be held within the
restricted channels 4 as they are guided to the respective
studs.
As already observed, the stud ends extending below the flange 22
are adapted to extend into openings of a conductor plate (not
illustrated) which is seated in section 19 of the base plate 20
which may, for instance, comprise a portion of the housing 21 for
mechanical swing elements so that during the attachment of the coil
member at a conductor plate the coil member at the same time
constitutes the attached member for an additional housing.
In the down turned position of the stud ends (that is when they are
displaced transversely to the axis of the coil) a simple attachment
of the winding ends is made posible, for instance, by means of the
same winding device used for the winding of the coil member itself.
The angular ends of the connecting studs can subsequently be
submerged into a solder bath whereby the winding ends are soldered
to the connecting studs. If the bent ends of the connecting studs
are thereafter bent back to a position parallel to the axis of the
coil, the winding ends now soldered to the connecting studs will
run entirely tension free to the coil member.
* * * * *