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Патент USA US2131942

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c, J, EVANS HAL
2,131,942
ELECTROIAGNETIC SWITCHING SYSTEM
Filed Jan. 2, 1936
2 Sheets-Sheet 1
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2,131,942
c. J. EVANS ET AL
ELECTROIAGNETIC SWITCHING SYSTEM
Filed Jan. 2, 1936
2 Sheets-Sheet 2
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2,131,942
Patented Oct. 4, 1938
UNITED STATES PATENT OFFICE
2,131,942
ELECTROMAGNETIC SWITCHING SYSTEM
Charles James Evans and Stanley Charles Evans,
Loweltolt, England
Application January 2, 1936, Serial No. 51,215
In Great Britain January 2, 1935
'lClalma (Cl. 175-375)
This invention relates to de?ecting devices actuating the
adapted to be associated with the lamps of
automobile vehicles.
Devices are known wherein provision is made
5 under the control of an electromagnet for de
?ecting the beam of light emitted by a motor
vehicle lamp to a plurality of positions, but in
these devices no provision is made ior automati
cally reducing the current consumption when the
10 beam is displaced to any one oi’ its de?ected posi
tions.
Other electromagnetic devices are known for
dipping one of a pair of lights and extinguishing
the other to avoid dazzle when two vehicles are
passing each other, wherein a supplementary
winding is brought into action by a contact de
vice at the end of the operation of the main wind
ing for reducing the current consumption, but
in these devices the beam is capable of occupying
only one dipped position.
The present invention consists of means for
causing the beam or beams of light emitted by
one or more motor vehicle lamps to occupy a
plurality of de?ected and/or dipped positions
25 with or without causing one or more other lights
to be extinguished or dimmed, controlled or actu
ated by the operation of one or more solenoids
and/or electromagnets consisting in part of one
or more slidable cores, and having means for
30 reducing current consumption when the beam
or beams of light occupy each or any one or more
35
contacts so as to control one or
more circuits whereby the current consumption
of the magnet windings is reduced with or with
out one or more other lights being extinguished
or dimmed.
The inward movement of the slidable core
may be effected by the magnetism produced when
electric current passes through one or more pri
mary windings and the core may be held in its
required position by the magnetism produced 10
when electric current passes through one or more
secondary windings with or without one or more
primary windings, a resistance being introduced
into the circuit or circuits of the primary wind
ings or the circuit or circuits of the primary wind 15
ings being interrupted. The secondary or re
sistance windings may be energized at the same
time as the primary windings, or alternatively,
they may be energized when the core has reached
its'required position.
core in contact with the magnet situated in its
path, but being insuilicient to continue its in
word movement. In order to continue the inward
movement of the core so that it occupies a second, 30
third or so energized position the magnetism of
of their de?ected and/or dipped positions.
According to a feature of-ythe invention, there
is provided an electromagnetically operated light
the magnet windings is again increased.
The invention is diagrammatically illustrated,
by way of example, in the accompanying draw
de?ecting and/or dipping mechanism comprising
ings, wherein:—
.
Figure l is a longitudinal section showing one
the combination of one or more electromagnets
consisting in part of one or more slidable cores or
convenient form of electromagnetically operated
magnetic plungers adapted to impart motion to
light de?ecting and/or dipping unit or switch, ac
means for controlling the beam of light to be de
cording to the invention,
40 ?ected and/or dipped to a plurality of‘positions,
a plurality of contacts, and means controlled or
actuated by the movement of the core or cores
for actuating the contacts and thereby reducing
the current consumption of the magnet windings
45 with or without causing one or more other lights
to be extinguished or dimmed.
According to another feature of the invention
the electromagneticaliy operated light de?ecting
and/or dipping unit or switch aforesaid may
50 comprise the combination of an electromagnet
consisting in part of a slidable core, one or more
electromagnets or portions of magnetic material
arranged in the path of the core each being slid
able with the movement of the core, a plurality
65 of contacts and means on the slidable core for
20
The core is held in its required positions and is
prevented from continuing its inward movement
to its full extent by reducing the magnetism of
the magnet windings when the core reaches or
almost reaches its required position, the amount
of magnetism than being su?lcient to hold the
Figure 2 is a plan view of the unit shown in
Figure 1, and
Figure 3 is an end elevation thereof, while
Figure 4 is a. wiring diagram showing one con
venient method of arranging the magnet wind~
ings and contacts of the switch shown in Fig
ure 1.
Figure 5 is a longitudinal section showing an
other Iorm of switch, or unit, and
Figure 6 is a plan view thereof, while
Figure 7 is an end elevation thereof.
Figure 8 is a wiring diagram showing one con
venient method of arranging the magnet wind
ings and contacts _oi' the switch shown in Fig
ure 5.
55
2
2,181,942
Like reference characters indicate like parts
throughout the several views.
,
Referring to the drawings, Figures 1 to 3 show
an electromagnetically operated switch |9 adapt~
ed to cause the beam oi’ light of a motor vehicle
lamp to occupy a plurality of de?ected and/or
dipped positions. This switch i9 comprises an
electromagnet 20, which may be of any conven
ient form. This electromagnet has a core or mag
10 netic plunger 2| slidable in the non-magnetic tube
22 which carries the magnet windings and is
carried by the U-shaped frame 23. The slidable
core 2| may be of any convenient form.
In the
type illustrated there is provided a shock-absorb
15 ing spring 24, held in position by the non-mag
netic washers 25 and 26, whereby the motion of
the core 2| is imparted to the non-magnetic actu
‘ating rod 21. The purpose oi’ the magnet is to
tilt the re?ector of the lamp, or cause change in
20 position of one or more re?ecting elements and/or
refracting elements and/or light sources, whereby
the beam of light emitted thereby is moved to a
plurality of de?ected and/ or dipped positions.
The bore of the tube 22 is of two different diam
25 eters, being greater at the end 28 than at the end
29, thereby producing a step 30 at the junction
of the two bores 28 and 29. Situated at the step
30 in the bore 28 is an electromagnet or cylindri
cal portion of magnetic material 3| having a bore
30 therein through which the rod 21 is free to pass.
This electromagnet or magnetic stop 3| is capable
of sliding against the return spring 32 towards a
?xed electromagnet 33 situated at the end of the
tube 22 remote from the magnet 3|. The ar~
35 rangement is such that the two magnets 3| and 33
may come into contact with each other.
The U
shaped frame 23 carries a plate 34 of insulating
material carrying on its under side three contact
pieces 35, 36 and 31, which are ?xed to the plate
40 34 at one end and are disposed parallel to each
other extending through holes in the plate 34 and
adapted to make contact with three independent
spring contact strips 39, 40 and 4| mounted on
the upper face of the plate 34 and disposed par
45 allel to each other. The contact strips 39, 40
and 4| are ?xed to the plate 34 at one end, the
strip 39 being connected to the terminal 42, the
strip 40 being connected to the terminal 43 by a
connecting strip situated below the plate 34, and
the strip 4| being connected to the terminal 44.
The negative or earth terminal of the switch is
shown at 43. The contact piece 31 is connected
to the terminal 45. The ends of the strips 39, 40
and 4| remote from their anchorage to the plate
55 34‘are curved upwards so as to allow the wedge
shaped cam 41 of insulating material carried by
the lateral projection 46 of the core 2|, to press
them upwards out of engagement with their cor
responding contact pieces 35, 36 and 31. The lat
60 eral projection 46 of the core 2| extends through
a slot in the plate 34, in the switch illustrated,
and the cam 41 is disposed above the plate 34.
The rod 21 of the switch i9 may be utilized in
any convenient manner so as to communicate mo
tion from the core 2| to the member to be actu
ated. For example‘ the switch i9 may be ?tted at
the rear of the pivoted re?ector with the rod 21
arranged so as to work in conjunction with a lat
eral projection of the rear of the re?ector and
70 thereby tilt the re?ector about its pivot axis.
The magnet windings and contacts of the switch
or switches may be arranged in any convenient
manner, one convenient method of arranging
those of the switch I9 is shown in the wiring dia~
75 gram illustrated in Figure 4.
Referring to this
Figure 4, the contact pieces are represented at 33,
36 and 31 respectively, whilst the spring contact
strips are represented at", 40 and 4|, respec
tively. The primary coil oi.’ the magnet windings
2|] is represented at 49, the secondary or resistance
coil of the magnet windings 2|) at 60, the source
of current at SI and the fuse at 32. At 33 is rep
resented the switch (or controlling the circuits of
the magnet windings which is arranged to supply
electric current either to the terminal 43 or to the 10
terminals 42 and 43, whilst the switch for control
ling the lights is represented at 64. In this fig
ure, the contact piece 31 and the spring contact
strip 4| are arranged in the circuit of the head—
light 55 to be extinguished, the headlight that is
de?ected and/or dipped being represented at 36.
The contact piece 31 and the spring contact strip
4| may be omitted when extinguishing the light
55 is not required, or extra contacts may be added
when other lights are required to be extinguished. 20
In the switch l9 illustrated the spring contact
strips 40 and 4| are longer than the strip 39 being
arranged so that when the core 2| is in ccntact
with the magnet 3| the strips 40 and 4| are out
of engagement with the contact pieces 36 and 31 -
respectively, whilst the contact strip 39 is still in
contact with the contact piece 36. When the
magnet 3| is pushed into contact with the mag
net 33 by the core 2|, then the spring contact
strip 39 is out of engagement with the contact 80
piece 35.
In Figures 2 and 4 the terminal for the ?rst
de?ected and/or dipped position is represented
at 43 and the terminal for the second de?ected
and/or dipped position is represented at 42. Thus 35
when current is supplied to the terminal 43 it
is supplied direct to the primary coil 49 since the
secondary coil 69 is short circuited by the con
tacts 36 and 40. This causes the core 2| to be
drawn inwards until the contacts 38 and 40 are 40
disconnected which introduces the secondary or
resistance coil 50 into the circuit 01 the primary
coil 49, and reduces the current consumption and
magnetism of the magnet windings and ceases the
inward movement of the core. When the core 45
has reached this position the reduced magnetism
of the magnet 3| is su?icient to hold the core in
contact therewith. When current is supplied to
the terminal 42 the terminal 43 remaining con
nected to the current supply, the primary coil 43 50
is again connected direct to the source, the cur
rent being conveyed by the contacts 35 and 39.
thereby short circuiting the secondary coil 30.
This again increases the magnetism and causes
the core 2| to be drawn still further within the
solenoid until the magnets 3| and 33 are in con
tact. When this occurs the contacts 35 and 3t‘
are disconnected thereby introducing the second
ary coil 50 into the circuit of the primary coil 43,
which reduces the current consumption and mag
netism of the magnet windings to an amount su?i
cient to hold the core in its inner position. It
will be noticed that the switch l9 arranged as
shown in Figure 4 has a delayed return to normal,
the said return to normal being effected by means
of a return spring (not shown) which is associ
ated with the lamp and causes the same to exert
pressure on the member 21 in the opposite direc
tion from that in which the core is adapted to
move under the in?uence of the magnetic ?eld
due to the energizing oi’ the solenoid, so that after
causing the beam to occupy its second, third or
so de?ected or dipped position by supplying cur
rent ?rst to the terminal for the ?rst position
and then to the terminal for the second or third
55
00
66
70
76
2,181,049
or so position, the current supply has to be dis
connected from] both or all of the said terminals
before any return movement of the beam occurs.
The magnet windings may comprise any number
of coils and any other convenient method of ar
ranging the magnet windings and contacts may
be employed.
The switch 51 shown in Figures 5 to '7 is similar
to the switch l9, but diifers therefrom in that
10 the core has three energized positions, for which
purpose there is provided two slidable magnets
3| and 58 ‘separated by the spring 82. The mag
net 58 is separated from'the ?xed magnet I! by
the spring 59 which is of higher tension than that
15 of the spring 32. The tube 22 has two steps 30
and 60 for the two magnets 3| and 58, respectively.
In this switch 51 there is provided for the third
de?ected and/or dipped position an extra contact
piece 6i ?tted below the plate 34 and working in
20 conjunction with a spring contact strip l2 ?tted
above the plate 34, the strip 62 being shorter than
the strip 39 and the strip 35 being shorter than
the strips 40 and ‘I. The terminal for the third
deflected and/or dipped position is shown at 63.
The wiring diagram shown in Figure 8 is sim
25
ilar to that shown in Figure 4, the contacts 6i and
62 are arranged similarly to the contacts 86 and
39, respectively, so, that when electric current is
supplied to the terminal 63, terminals 42 and 43
remaining connected to the current supply, cur
rent is supplied direct to the primary coil ll, be
ing conducted by the contacts SI and 82 thus short
circuiting the secondary coil 50 until the core
reaches its innermost position. When it reaches
this position the contacts 6! and 82 are discon~
nected thereby introducing the secondary coil
again into the circuit of the primary coil.
Any desired number of electromagnets or por
tions of magnetic material may be similarly ar
40 ranged in the path of the core, and any number
of contacts may be arranged to be actuated ac
cording to the position of the core, so as to obtain
any desired number of de?ected and/or dipped
positions of the beam of light.
Having now described our invention, what we
claim as new and desire to secure by Letters Pat
ent is:
1. An electro-magnetic switching system com
prising a bascplate, a solenoid rigidly supported
50 thereon, a core slidably engaged in the solenoid,
a displaceable member rigidly connected with the
core and adapted as a consequence of the slidable
movement thereof to be moved into a plurality
of positions. a control switch having a movable
contact and a plurality of fixed contacts corre
spending in number with the said number of posi
tions. means adapted upon movement of the mov
able contact of said control switch into engage
ment with any one of the ?xed contacts to cause
60 the solenoid to be energized at a relatively high
rate of current consumption whereby the core is
caused to move the displaceable member into one
of the said positions, stops adapted to retain the
core in any one of the positions into which it may
; be moved as long as the movable contactoi the
said control switch is maintained in engagement
with the corresponding ?xed contact, and switch
ing means secured to the base plate adapted as
the core approaches any one of the said positions
70 to be actuated by the displaceable member to
reduce the current consumption of the solenoid.
2. An electro-rnagnetic switching system com
prising a base plate, a solenoid rigidly supported
thereon, a core slidably engaged in the solenoid,
a displaceable member rigidly connected with
3
the core and adapted as a consequence of the
slidable movement thereof to be moved into a
plurality of positions, a control switch having a
movable contact and a plurality of ?xed con
tacts corresponding in number with the said
number of positions, means adapted upon move
ment of the movable contact of said control
switch into engagement with one of the ?xed
contacts to cause the solenoid to be energized at
a relatively high rate of current consumption 10
whereby the core is caused to move the displace
able member into one of the said positions, an
axially movable stop within the solenoid adapted
to retain the core in the said position as long as the
movable contact of the switch is maintained in 15
engagement with the said contact, means adapt
ed as the core approaches the said position auto
matically to reduce the current consumption of
the solenoid, means adapted upon movement of
the movable contact into engagement with a fur 20
ther ?xed contact to cause the solenoid again to
be energized at a relatively high rate of current
consumption whereby the core and the displace
able member are moved into another position, a
stop adapted to retain the core in the second men 25
tioned position as long as the movable contact of
the switch is maintained in engagement with the
second mentioned ?xed contact, and switching
means secured to the base plate adapted as the
core approaches the said other position to be 30
actuated by the displaceable member to reduce
again the current consumption of the solenoid.
3. An electro-magnetic switching system as
claimed in claim 1, in which the solenoid is con
stituted by a primary winding and a secondary
winding having a connection between one end
of the primary winding and one end of the sec
ondary winding. and in which the said switching
means adapted to be actuated by the displaceable
member comprises further switches correspond
ing in number with the said number of positions,
each of the said further switches having one con
tact thereof connected with the point of connec
tion between the primary and secondary windings
and the other contact thereof connected with one
of the ?xed contacts of the said control switch,
a lead connecting that end of the secondary wind
ing remote from its connection with the primary
winding with the ?rst of the ?xed contacts of
the control switch, a source of electrical energy 60
having one pole thereof connected with the mov
able contact of the control switch and the other
pole thereof connected with that end of the pri
mary winding remote from its connection with
the secondary winding, whereby asra consequence 65
of movement of the core under the influence of
the magnetic field set up in the primary winding
by a relatively high rate of current consumption
when the movable contact of the control switch
is brought into engagement with one of its ?xed
contacts the said displaceable member is caused
to open the contacts of one of the said further
switches thereby placing the secondary winding
in series with the primary winding and maintain
ing the current consumption at a reduced value
as long as the movable contact of the control
switch is retained in engagement with the said
?xed contact thereof.
4. An electro-magnetic switching system com
prising a base plate, a solenoid rigidly supported 70
thereon, a core slidably engaged in the solenoid, a
displaceable member rigidly connected with the
core and adapted as a consequence of the slid
able movement thereof to be moved into a plu
rality of positions, a control switch having a mov
75
4
2,131,042
able contact and a plurality of ?xed contacts
corresponding in number with the said number
of positions, means adapted upon movement of
the movable contact of the control switch into
engagement with any one oi.’ the ?xed contacts to
cause the solenoid to be energized at a relatively
high rate of current consumption whereby the
core is caused to move the displaceable member
into one of the said positions, axially movable
10 stops in the solenoid arranged in the path of
travel of the core and spaced apart at positions
corresponding with the distances through which
the core is displaced when moving from one posi
tion into an adjacent position, the said stops be
ing adapted to retain the core in any one of the
positions into which it may be moved as long as
the movable contact of the switch is maintained
in engagement with the corresponding fixed con
tact, and means adapted as the core approaches
20 any one of the said positions automatically to
reduce the current consumption of the solenoid.
5. An electro-magnetic switching system as
claimed in claim 4 comprising a tubular element
upon which the solenoid is supported, and shoul
ders therein forming abutments for locating the
stops in their normal position.
6. An electro-magnetic switching system as
claimed in claim 4 comprising means adapted
resiliently to urge the stops towards their normal
30
positions.
7. An electro-magnetic switching system as
claimed in claim 1, in 'a'hich the solenoid is con
stituted by a primary winding and a secondary
winding having a connection between one end of
35 the primary winding and one end of the second;
ary winding, and in which the said switching
means adapted to be actuated by the displaceable
member comprises further switches correspond
ing in number with the said number of positions,
each oi the said further switches having a hex
lble movable contact secured to the base plate
and connected with the point of connection be
tween the primary and secondary windings, and
a ?xed contact connected with one or the ?xed
contacts of the said control switch, a lead con 10
necting that end of the secondary winding remote
from its connection with the primary winding
with the ?rst of the ?xed contacts of the control
switch, a source of electrical energy having one
pole thereof connected with the movable con 15
tact of the control switch and the other pole
thereof connected with that end of the primary
winding remote from its connection with the sec
ondary winding, whereby as a consequence of
movement or the core under the in?uence of the 20
‘magnetic ?eld set up in the primary winding by a
relatively high rate of current consumption when
the movable contact oi’ the control switch is
brought into engagement with one of its ?xed
contacts the said displaceable member is caused 25
to open the movable and ?xed contacts of one of
the said i'urther switches thereby placing the sec
ondary winding in series with the primary wind
ing and maintaining the current consumption at
a reduced value as long as the movable contact
of the control switch is retained in engagement
with the said ?xed contact thereof.
CHARLES JAMES, EVANS.
STANLEY CHARLES EVANS.
35
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