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Патент USA US3089121

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May 7, 1963
Filed Dec. 7, 1959
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Thomas E. Kirk
The'i'r Afforney
Ma! 7, 196.3 .
Filed Deb. 7, 1959
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Louis J. Raver
By '
Thomas E. Kirk
Their Affomey
United States Patent 0 "
Patented May 7, 1963
a tap point 42 connected to one side of the Zener diode
20 and with the condenser-s 30 and 32.
Louis J. Raver and Thomas E. Kirk, Anderson, 1116., as
signors to General Motors Corporation, Detroit, Mich.,
a corporation of Delaware
Filed Dec. 7, 1959, Ser. No. 857,725
3 Claims. (Cl. 338-260)
This invention relates to resistance assemblies having a
The voltage dividing resistors 36, 38 and 40 are con
nected with the resistance assembly of this invention which
includes resistors 44, 46, 48 and 50. The resistor 36
is connected with resistor 44- by a conductor 52 and it is
seen that various tap points 54, 56, 58‘ and 60 are pro
vided which actually take the form of hollow metal rivets
as will become ‘more readily apparent hereinafter. The
plurality of taps which has particular utility in adjusting 10 base of the regulator is designated in its entirety by refer—
the operating characteristics of a voltage regulator of
ence numeral 62 and is shown in dotted lines in FIGURE
the type employed in regulating the output of a generator
1. This base is connected to ground in a motor vehicle
in a motor vehicle electrical system.
electrical system and is formed with threaded openings
One of the objects of this invention is to provide a
64, '66, 68 and 70 in a manner to be more fully described
resistance assembly for a regulator that is small in size 15 hereinafter. It can be seen from the circuit diagram of
and economical to manufacture.
Still another object of this invention is to provide a
FIGURE 1 that one side of the p11 junction semi-con
ductor recti?er 22 is connected with the base and thus to
ground as is one side of the resistor 50‘.
resistance assembly for a regulator wherein the assembly
is mounted against the metal base of the regulator and
The voltage regulator of FIGURE 1 operates to con
wherein the tap points of the resistor are selectively con 20 trol the ?eld current of the ?eld winding that is connected
nected directly to the metal base by a member termed
with terminal 12. Thus, ?eld current will be controlled
of electrically conductive material which may be shifted
by turning the transistor 14 on and oil and this transistor
from one tap point to another and when in position is
operates opposite to the conduction of transistor 16. In
supported by the base.
other words, when transistor 16 is substantially ‘fully con
A further object of this invention is to provide a resist 25 ductive, transistor 14 becomes substantially non-conduc
ance assembly for a regulator that includes an insulator
tive and vice versa.
that is wound with a resistance wire, there being a plu
rality of hollow rivets engaging the resistance wire at
controlled by a circuit network including the Zener diode
20 and the voltage which is sensed by this circuit network
The conduction of transistor 16 is
predetermined points to form tap points, and further
depends upon the resistance appearing between tap point
wherein the resistance assembly is supported by the metal 30 42 and ground. It will be appreciated that this resistance
base of the regulator in such a position that the hollow
may be varied by selectively connecting tap‘ points. 54,
rivets are located in alignment with threaded openings
56, 58 and 60 respectively with the openings 64, 66, 63
formed in the base, there being a threaded fastener that
‘and 70’ ‘formed in the regulator base 62.
may be selectively passed through a rivet and threaded
' Referring now more particularly to FIGURE 4, it is
into the base for electrically connecting a given rivet 35 seen that the resistance assembly of this invention includes
with the base member.
a sheet of insulating material 71 upon which is wound a
Further objects and advantages of the present inven
length of resistance wire vforming resistors 50, 48, 46, and
tion will be apparent {from the following description,
44. The resistance assembly is ‘fabricated by ?rst ?tting
reference being had to the accompanying drawings where
the insulator board 71 with a plurality of metal hollow
in a preferred embodiment of the present invention is
eyelet-s or rivets 72, 60‘, 58, 56 and '54. When the rivets
clearly shown.
are in place on the insulator board 71, the insulation is
In the drawings:
scraped from a portion of the wire and this portion is
‘FIGURE 1 is a ‘circuit diagram of a voltage regulator
wrapped under the eyelet 54. The wire is then wound
that employs the resistance assembly of this invention.
around the insulator 71 to form the resistor 44, is then
FIGURE 2 is a front view of a regulator having the 45 wound under eyelet 56 and so on until resistors 44, 46,
resistance assembly oat this invention.
48 and 50‘ are formed with the resistance wire passing
FIGURE 3 is a view partly in section of a portion of
around the intermediate eyelets. In each case, it is neces
the regulator illustrated in FIGURE 2.
sary to scrape the insulation ed the wire where the wire
FIGURE 4 is a perspective view of a resistance assem
is to contact an eyelet. After the wire is wound on the
bly made in accordance with this invention.
insulator board and around the eyelets, the eyelets have
FIGURE 5 is an end view of the resistance assembly
crimping pressure applied to them so as to form a tight
illustrated in FIGURE 4.
connection between a given eyelet and the resistance
Referring now to the drawings and more particularly
to FIGURE 1, a voltage regulator designated in its en
The resistance assembly illustrated in FIGURES 4
tirety by reference numeral 10‘ is illustrated which em 55
and 5 is secured to the metal base 62 of the voltage regu
ploys the resistance assembly of this invention. This
lator 10 in a manner illustrated in FIGURES 2 and 3
regulator has a terminal 34 which is adapted to be con
of the drawings. It can be seen from FIGURE 3 that
nected to one side of the battery in a motor vehicle elec
the resistance assembly illustrated in FIGURES 4 and 5
trical system. and to one side of the power source which
may be a DC. generator or could be an A.C. generator 60 is interposed between sheets of insulating material 73
and 74. A rivet 75 passing through the eyelet 72. in the
?tted with recti?ers. Without going into great detail the
resistance assembly serves to secure the resistance as
voltage regulator includes the transistors 14 and 16, a
sembly and the insulators 73 and 74 to the base of the
pn junction semi-conductor recti?er 18, a Zener diode 20,
a second pn junction semi-conductor recti?er 22, resistors 65 regulator 62. This rivet 75 also serves to electrically
connect the hollow eyelet or rivet 72 with the base mem
24, 2'6 and 28 together with condensers 30 and 32. The
ber 62 and it is thus seen that the rivet 75 serves to
regulator has a ?eld terminal 12 which is adapted to be
connect the eyelet 72 with ground potential. Rivets 76
connected with the ?eld winding of the power source
which as noted hereinbefore may be of any direct cur
are also provided which serve to hold the resistance ‘as
rent type. The voltage regulator 10 further includes a 70 sembly ?xed with respect to the base 10‘, and do not
serve any electrical function. The eyelet 54 is suitably
voltage dividing network including resistors 36, 38 and
connected with the resistor 36, which is not illustrated
40. The resistor 38 is of the potentiometer type having
in FIGURES 2 and 3, by any suitable means such as
insulating material carrying a length of resistance Wire,
a strap connector.
a plurality of metal eyelets each having a ?ange portion
located in spaced openings formed in said insulating ma
The ?anged portion 78 of the regulator base 10 is
formed with a plurality of threaded openings 64, 66, 63
and 70, the opening 68 being illustrated in FIGURE 3.
erial, said eyelets being connected with spaced points of
said resistance wire with portions of said resistance wire
being wedged between said ?ange portion of the eyelet
These openings 64, 66, 6S and 70 are located respec
‘and the said insulating material at said spaced points,
tively in alignment with the hollow eyelets or rivets 54,
means for supporting said resistance assembly in such a
56, 58 and 60. When it is desired to connect a particular
position that said eyelets are in alignment with said
eyelet with the base member 62, a screw 80 is passed
through one of the eyelets ‘and is threaded into one of 10 threaded openings, means for insulating opposite sides
of said resistance assembly including a pair of insulating
the threaded openings formed in the ?anged portion 78
sheets, means for supporting said resistance assembly
of the base 62. In FIGURE 3, the screw 80 is shown
from said side ?ange including an electrically conductive
connecting the eyelet 58 with the base member, the screw
rivet which passes through one of said eyelets to elec
being threaded into the threaded opening 68. It will be
appreciated that the screw 81} may be shifted from one 15 trically connect said one eyelet with said metal base mem
her, and a fastener formed of electrically conductive ma
eyelet to another to provide a predetermined voltage
terial adapted to pass through one of said eyelets and into
adjustment for the voltage regulator 10. It thus can
one of said threaded openings, said fastener having a
be seen that if it is desired to change the voltage ad
head portion engageable with a ?ange portion of the eye
justment of the regulator, it is only necessary to un
screw the ‘fastener 80 from its position in the threaded 20 let with which it is ‘associated.
3. In combination, a metal base member having a side
opening 68 ‘and then pass the screw through another eye—
?ange, a sheet of insulating material having a plurality
let and into another threaded opening. This provides
of spaced openings, a metal eyelet in each opening hav
for simple and accurate adjustment of the voltage regu
ing ?ange portions connected by a tubular portion that
lator and does not greatly increase the size of the regu
lator since the resistance assembly is relatively small in 25 passes through a respective opening, a length of resist
ance Wire carried by said sheet of insulating material,
width and is mounted in compact relationship with the
said wire being Wound around said sheet of insulating
side ?ange 78 of the base member 62.
material in at least one complete turn at points located
While the embodiments of the present invention as
between said eyelets and being wound partially around
herein disclosed constitute preferred forms, it is to be
the tubular portions of said eyelets in half turns, at least
understood that other forms might be adopted.
a portion of said half turn being wedged between a
What is claimed is as follows:
?ange portion of said eyelets and said sheet of insulat
1. In combination, a metal base formed with a side
ing material, one of said eyelets being connected with
?ange, said side ?ange having ‘a plurality of spaced
the end of said length of said resistance wire, a plu
threaded openings, a resistance ‘assembly supported by
said side ?ange including a sheet of insulating material 35 rality of threaded openings in said side ?ange aligned
with said eyelets, an electrically conductive fastener hav
upon which is wound a length of resistance wire, a plu
ing a shank portion passing through another of said
rality of eyelets located in spaced openings in said insu
lating material and connected With spaced points of said
eyelets and threaded into one of the threaded openings
in said side ?ange, said fastener having a portion of
resistance wire, one of said eyelets being connected with
the end of the length of said resistance Wire, said eye 40 larger diameter than said shank portion that engages a
?ange portion of the eyelet it is associated with, and a
lets being located respectively in alignment with the
threaded openings formed in said side ?ange, ?rst and
rivet passing through said one of said eyelets and en
gaging said side ?ange to electrically connect said one
eyelet with said side ?ange and to mechanically support
second sheets of insulating material one of which is po
sitioned between said resistance assembly and said side
?ange and the other of which is Positioned on the oppo
site side of said resistance assembly, an electrically con
ductive rivet passing through said one eyelet and engag
the sheet of insulating material from said side ?ange.
References Cited in the ?le of this patent
ing said side ?ange for electrically connecting said one
eyelet with said side ?ange and for mechanically sup
porting said resistance assembly and said sheets of in
sulating material from said side ?ange, and a screw
adapted to be passed through another of said eyelets and
threaded into one of said threaded openings for elec
trically connecting another of said eyelets with said side
2. In combination, a metal base formed with a side
?ange, a plurality of threaded openings in said side
?ange, a resistance assembly formed of a thin sheet of
Cl Cl
Grigsby _____________ __ Nov. 14,
Gill _________________ __ May 21,
Reimers et a1 ___________ __ May 1,
Hastings ____________ __ Nov. 19,
Law ________________ __ Mar. 23, 1943
Geiger _______________ __ ‘Oct. 7,
Gribble ______________ __ Dec. 6,
Grinstead et a1 _________ __ Dec. 11,
M-aly ________________ __ May 27,
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