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Патент USA US3047701

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July 31, 1962
R. L. SPRAGUE ETAI.
3,047,690‘
MAGNETIC swrrcn
Filed Jan. 8, 1960
28
INVENTORS
Richard L. Sprague
By Donald E Wigner
The/r Attorney
\ United. States Patent O?ice ’
1
I
3,047,690
Patented July '31,‘ 1962
2
insulating material. The tubular member 40‘ carries an
3,047,690
annular contact 42 which is made of suitable electrically
MAGNETIC SWITCH
conductive material and which isconnected to one side
Richard L. Sprague and Donald F. Wigner, Anderson,
of the ‘coil winding 34 via a lead wire 44. The other lead
Ind., assignors to General Motors Corporation, De
45 of coil winding 34 is connected with the metal spool
troit, Mich., a corporation of Delaware
'
member
36 which in turn is electrically connected with
Filed Jan. 8, 1960, Ser. No. 1,265
the case 10 of the magnetic switch via the core member
'
9 Claims. (Cl. 200-87)
32 and spring 46. A metal washer 48 formed of magnetic
This invention relates to magnetically operated switches
material is carried by the armature core member 32 and
and more particularly to a magnetic switch which'when 10 is positioned between the insulator member ‘40' and a
manually moved to a closed position is held in this posi
shoulder 50 formed on the armature core.
tion by magnetic forces generated by a coil winding.
The armature core 32 carries a manual actuator 52
One of the objects of this invention is to provide a
which passes through a metal bushing 54 formed of mag
magnetic switch which is simple in construction, economi
netic material and secured within an opening in the case 10.
cal to manufacture and durable in operation, _.
15 The bushing ‘54 slidably supports the coil and contactor
Another object of this invention is to provide a mag
assembly during its axial movement Within the case 10‘.
netic switch that includes a movable armature core that
carries a coil winding, the armature core also supporting
an electrical contactor which is adapted to complete a cir
cuit for the coil winding whenever the armature core is
cuit is illustrated employing the magnetic switch of this
manually shifted to a predetermined position.
lead wire ‘45 connected directly to ground“ The lead wire
Referring now more particularly to FIGURE 3, a cir
invention. It is seen that the coil winding 34 has one lead
wire 44 connected with the contactor 42 and has another
‘ Another object of this invention is to provide a mag
45 of FIGURE 3 corresponds to one end of the coil Wind
netic switch that includes an armature core member carry
'ing 34 which is electrically connected with the metal spool
ing a coil winding and wherein a switch contactor moves
36 and thus is electrically connected with the case Ill of
with the armature core member to complete a circuit for 25 the switch. It will be appreciated that the case 19 in the
the coil winding whenever the armature core member is
manually moved in one direction, there being a resilient
means provided for normally biasing the armature core
member in such a direction that the circuit for the coil
winding is open.
-
~
~
Further objects and advantages of the present invention
will be apparent from the following description, reference
being had to the accompanying drawings wherein a pre
ferred embodiment of the present inventionsis clearly
shown.
'
'
In the drawings:
FIGURE 1 is.-a sectional view taken along line 1—1 of
FIGURE 2 illustrating a magnetic switch made in accord
system will be at ground potential. The contact 26 is con
nected to one side of an electrical load 58, the opposite
side of the load being connected to ground as ‘shown. The
contact 22 is connected to one side of a manually operable
30 switch 60 and this switch is connected to one, side of a
_ storage battery 62. It is seen that the opposite side of the
storage battery is grounded.
,
In operation of this magnetic switch and assuming that
the manually operable switch 60is closed, the manual ac
35 tuator 52 may be grasped to move the entire coil and
‘ contactor assembly 30 leftwardly in FIGURE 1 to a posi
tion‘ wherein the contactor 42 connects the contacts 22
and 26. In this position ofthe magnetic switch, the
metal lwasher 48 engages the metal washer 28. When
'FIGURE 2 is a sectionalview taken along line; 2—2 ,
the contactor ‘42 connects the contacts 22 and 26, a cir
of FIGURE 1.
a
.
' cult is made ‘for the load 58‘ and a circuit is also made
FIGURE 3. is a schematic circuit diagram of the
for the coil winding 34. ' With, the coil winding 34 ener
ance with this invention.
'
magnetic switch of this invention, the switch being shown
for use. in controlling the application of power from a
gized,.the switch is held in a circuit closed position by
reason of the magnetic flux produced by thecoil winding
45 34. Thus, the washer 48 will be held to the washer 28
battery to a load. .
Referring now to the drawings and more particularly ' when the coil winding 34 is energized. and the contactor
to FIGURE 1, it is seen that the magnetic switch. of this
'42 will continue to connect the contacts 22 and 26, The
magnetic switch will now maintain the circuit closed be
secured to a base member 12 by staking over the hous
tween the battery .62 and load_58 as long as the switch
ing-10 as at 14. The base member 12 is formed of a suit 50 60 is closed. Whenthe switch 60 is opened, the circuit
able electrical insulating material and carries a pair of ' for the coil winding 34 is opened and the spring 46 shifts
male terminals 16 and 18 which are adapted to be. con
the coil and contactor assembly 30 back to its position
nected to a ‘female type of connector. The terminal 16 is
illustrated in FIGURE 1 wherein thecontactor 42 is out
of contact with the contacts 22 and 26. The magnetic
held to the base member 12 by a ‘rivet, 20 which also holds
a contactor 22 in place. A .similar rivet 24 holds the 55 switch may also be opened by grasping the manual actui
terminal 18 and a second contactor 26 ?xed with respect
at’or 52 and shifting it rightwardly in FIGURE'l to cause
contactor 42 to be shifted out of engagement with contacts’
v to the base 12. The contactors 22 and 26 are formed of
22 and 26. This will break the circuit for coil winding
spring, metal materialrand are electrically connected re
34 so that the switch will remain open until contactor
spectively with male terminals 16 and 18 through the
rivets 20 and 24. A washer member 28 formed of mag 60 42 is once more caused to engage contacts 22 and 26.
invention includes a metal case or housing 10 which is .
netic material is interposed between a ?anged portion of
In the FIGURE 1 position of the switch, the end of the
the housing 10 and the base member 12 as is clearly ap
extension 38 contacts the base member 12 to prevent fur
ther rightward movement of the contactor and coil as
parent from FIGURE 1.
'
sembly 30. When the switch is pulled leftwardly manual
and contactor assembly which is generally'designated by 65 ly, the bushing 54 serves to guide the switch and in the
closed position of the switch, the magnetic attraction be
reference numeral 30 and which includes the armature .
tween plates 28 and 48 aids in supporting the coil and
' core member 32 and the coil winding 34. A metal spool
contactor assembly 30. The coil and contactor assembly
36 carries the coil winding and this spool is press ?tted to
> The magnetic, switch of this invention includes a coil
the armature core member 32. The core member 32 is 70 30 is thus adequately supported by use of a Single bush
ing 54 by the base member 12 when the magnetic switch
formed of a suitable magnetic material and has an exten
is in the 'position‘of FIGURE 1 and by the magnetic at
sion 38 which carries a tubular member 40 formed of
3,047,690
3
it
traction of plates 28 and 48 when the magnetic switch
of magnetic material and an electrical contactor, a con
is shifted to a position wherein the contactor 42 connects
the contacts 22. and 26.
While the embodiment of the present invention as here
in disclosed constitutes a preferred form, it is to be under
stood th-at other forms might be adopted.
'
What is claimed is as follows:
ductor connecting one end of said coil winding with said
contactor and shiftable with said assembly, means con
necting the other end of said coil winding withv said core
member, a pair of ?xed electrical contacts adapted to
be engaged by said contactor when said shiftable assem
bly is shifted, a plate member formed of magnetic mate
rial ?xed with respect to- said shiftable assembly, and re
1. A magnetic switch comprising, a shiftable assembly
including; an armature core, a coil winding and a con
silient means for biasing said shiftable assembly in one
tactor all movable together as a unit, a pair of ?xed con 10
direction.
tacts adapted to be engaged by said contactor, one of
6. A magnetic switch comprising, a housing, a shift
able assembly including; ‘a coil winding and an electrical
contactor slidably supported in cantilever fashion by
said housing, resilient means ‘for biasing said shiftable
which is adapted to be connected to a power source and
" the other of which is adapted to be connected to a load,
and a lead Wire shiftable with said assembly connecting
said coil winding wtih said contactor.
15
.
assemlby into engagement with a portion of said housing,
a pair of ?xed contacts positioned to be engaged by said
contactor when said shiftable assembly is shifted, and a
conductor connecting one end of said coil winding with
2. A magnetic switch comprising, a shiftable assembly
including; an armature core, a coil winding and an elec
‘ trical contactor, manually operable means for shifting said
said contactor.
t
- - i
,' E l
shiftable assembly, a pair of ?xed contacts one of which
7. A magnetic switch comprising, housing means d —
is adapted to be connected to a power source and the 20
?ning an enclosed chamber, a shiftable assembly posi
other of which is adapted to be connected to a load, said
contacts being positioned to be engaged by said contactor
tioned within said housing means including; an armature
when said shiftable assembly is shifted, and a conductor
connecting said coil winding with said contactor and shift
core member, a coil winding, and a contactor, means con
necting one end of said coil winding with said contactor,
25 means slidably supporting said shiftable assembly in said
able with said assembly.
housing means, a pair of ?xed contacts adapted to be en
3. A magnetic switch comprising, a shiftable assembly
gaged by said contactor, and resilient means normally
including; an armature core, a coil winding, a plate mem
urging one end of said shiftable assembly into engage~
ber formed of magnetic ‘material and an electrical con
ment with a portion of said housing means.
tactor insulated ‘from said core member, a relatively ?xed
plate member formed of magnetic material spaced ‘from
the plate member carried by said shiftable assembly, a
30
8. A magnetic switch comprising, a shiftable assembly
pair of electrical contacts one of which is adapted to be
including; an armature core, a coil winding and a con
tactor all movable together as a unit and shiftable in two
connected to a power source and the other of which is
adapted to be connected to a load, said electrical con
directions, a pair of ?xed contacts adapted to be engaged
by said contactor when said assembly is shifted in one
tacts being positioned ‘for engagement with said contactor
when said shiftab-le assembly is shifted, an electrical con
direction, one of which is adapted to be connected to a
ductor connecting said coil winding with said contactor,
connected to a load, a lead wire shiftable with said as
and resilient means biasing said shiftable assembly to a
sembly connecting said coil winding with said contactor,
position wherein said magnetic plate members are spaced
and resilient means biasing said shiftable assembly in an
apart and said contactor is spaced from said contacts.
4. A magnetic switch comprising, a base member
formed of insulating material carrying a pair of ?xed elec
trical contacts, one of which is adapted to be connected
power source and the other of which is adapted to be
opposite direction, said assembly and contactor being
manually shiftable out of engagement with said ?xed con
tacts' against the magnetic attraction of said coil wind—
ings when it is energized and being shiftable out of en;
gagement with said ?xed contacts by said resilient means
to a power source and the other of which is adapted to
be connected to a load, a housing secured to said base 45 when said coil winding is deenergized.
member ‘formed of magnetic material, a bushing carried
by said housing, a plate member formed of magnetic ma
terial carried by said housing, a shiftable assembly in
cluding an armature core member having a portion slid
9. A magnetic switch comprising, a shiftable assembly
including; an armature core, 'a coil winding and contactor
all movable together as a unit, at least one ?xed contact
adapted to be engaged by said contactor, and a lead wire
able through said bushing, a coil winding, a second plate
shiftable with said assembly connecting said coil winding
member formed of magnetic material and a contactor,
said contactor being adapted to engage said ?xed contacts
with said contactor.
"
References Cited in the ?le of this patent
when shiftable assembly is shifted and said second plate
member being adapted to contact said ?rst plate member 55
UNITED STATES PATENTS
when said shiftable assembly is shifted, resilient means
1,839,629
Williams ______________ __ Jan. 5, 1932
interposed between said shiftable assembly and said hous
1,934,320
Nowosielski ___________ __ Nov. 7, 1933
ing and an electrical conductor connecting said coil wind
2,283,340
Ray ________ __- _______ __ May 19, 1942
ing with said contactor.
2,298,068
Pierce ________________ .. Oct. 6, 1942
5. A magnetic switch comprising, a shiftable assembly 60 2,648,735
Marshall _____________ __ Aug. 11, 1953
including; an armature core memberv formed of magnetic
material carrying a coil winding, a plate member formed
2,661,412
2,663,804
Dreyfus ______________ __ Dec. 1, 1953
Wolf __ ________ __________ Dec. 22, 1953
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