Note: Descriptions are shown in the official language in which they were submitted.
BACKGROUND OF THE INVENTION
Generally speaking, the present invention pertains to a coil bobbin
comprising a cylinder having an outer surface upon which wire may be
wound; oppositely disposed flanges extending outwardly from opposed ends
of the cylinder providing an annulus receiving the wire; a housing carried
on one of the flanges; a slit disposed with the one flange extending along
a perimeter thereof beneath and at least to opposed sides of the housing;
a pair of apertures in a base of the housing extending through the one
flange to the slit, a pair of exits from the slit to the annulus, one
at an end of the slit, the other beneath the housing in line with the
pair of apertures; and a partition extending from the one flange between
the pair of apertures to the exit beneath the housing.
The present invention pertains to a coil bobbin and more particularly
to a coil bobbin having a means for terminating the ends of wire wound
on the bobbin.
The termination of small magnet wire has presented numerous
difficulties largely because of the fineness and the inherent frailties
of the wire. Particularly troublesome are the very small gauge magnet
wires employed on coils employed in small synchronous motors used in
appliance timers. Not only are the wires difficult to handle but
there must also be a means to terminate the wires in a manner that provides
good electrical insulation. One such method utilized a tape over the
electrical connection. Such a method was at best somewhat unreliable
and in addition added fabrication difficulties. The present invention,
therefore, is directed to a coil bobbin having improved means to terminate
the ends of the wire carried by the bobbln.
OBJECTS OR FEATURES OF THE INVENTION
It is, therefore, a feature of the invention to provide a coil
bobbin having a means to terminate the ends of a wire carried by the
bobbin. Another feature of the invention is to provide such a coil
bobbin wherein the means to terminate the wires effectively provides
`J~
good electrical insulatlorl. Another feature of the invention is to
provide such a coil bobbin having a cylinder for carrying the wire,
oppositely disposed flanges extending from the cylinder and a slit
within one of the flanges for receiving electrical terminals carried
by the bobbin. Still another feature of the inventiorl is to provide
such a coil bobbin wherein the slit is disposed beneath a housing for
the electrical terminals and carried on the flange containing the slit.
Yet another feature of the invention is to provide such a coil bobbin
wherein there is a pair of exits from the slit to the wire carried
by the bobbin. These and other features of the invention will become
apparent from the following description taken in conjunction with the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a view showing a complete coil bobbin employing the
features of the invention.
Figure 2 is a view showing the bobbin with wire wound on the
bobbin.
Flgure 3 is an enlarged view of a portion of the bobbin of Figure
2 showing the means to terminate and electrically insulate the wire
terminations.
Figure 4 is a section taken along the line 4-4 of Figure 2.
DETAILED_DESCRIPTION OF THE INVENTION
Referring now to the drawings, there is shown a coil bobbin lO
which includes a cylinder 12 having an outer surface 12' upon which a
coil of wire 14 may be wound. The bobbin is fabricated from an
electrically insulative material such as a suitable plastic. Flanges
16 and 18 extend outwardly from opposed ends of the cylinder to
provide an annulus 20 for carrying -the wire 14. A housing 22 is carried
on one of the flanges to receive a pair of electrical terminals 24 and
26, each of the terminals beiny carried in separate compartments 28 and
30 of the housing.
In accordance with the invention, a slit 32 is provided in flange
16 which extends along a perimeter of the flange beneath the housing 22
to at least the opposed sides 34 and 36 of the housing. A pair of
apertures 38 and 40 extend through the base of the housing and through
an exit 42, the flange 16 to open to the annulus 20. As shown, a
partition 44 separates exit 42 into two separate openings ~2 and 54.
As can be clearly seen in Figure 2, terminals 24 and 26 extend from
housing 22 through the apertures 38 and 40 and through the slit 32 to
the anrlulus 20. There is another exit 46 at the end of the slit 32.
To wind the wire on the bobbin and terminate its ends in accordance
with the invention, the terminals 24 and 26 are inserted into their
respective compartments of housing 22 with the ends 24' and 26' of
the terminals being extended through apertures 38 and 40 of the flange
and through openings 52 and 54 and then, as shown in Figures 2 and 4,
the ends of the terminals are bent up to be substantially normal to
the axis of the bobbin. The wire is then wound on the bobbin by first
attaching the start end 50 of the wire first being wound on the end 26'
of the terminals and finally the finish end being wound on terminal
24'. As shown in Figure 3, the terminals are then bent over and fitted
into the slit 32 with the start end 50 being fed out exit 46 and the
finish end 56 being fed through opening 52. Apertures 38 and 40 are of
sufficient size to permit the terminals ends 24' and 26' to be twisted
and bent into the slit without breakage. The wire has now been completely
wound on the bobbin and its ends electrically insulated from each
other.
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