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Патент USA US2136699

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NOV. 15, 1938.
a H, LELAND
2,136,699
CIRCUIT CONTROLLING DEVICE
Filed Aug. 4, 1937
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NW. 15, 1938.
G. H. LELAND
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2,136,699
CIRCUIT CONTROLLING DEVICE
Filed Aug. 4, 1937
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G, H. LELAND
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2,E36,699
CIRCUIT CONTROLLING DEVICE
Filed Aug- 4, 1957
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Patented Nov. 15, 1938
UNITED STATES? PATENT OFFICE
2,136,699
CIRCUIT CONTROLLING DEVICE
George H. Leland, Dayton, Ohio, assignor to The
Leland Electric Company, Dayton, Ohio, a. cor
poration of Ohio
Application August 4, 1937, Serial No. 157,365
22 Claims.
This invention relates to a circuit controlling
device and is adapted for various uses, such as a
voltage changer, a reversing switch, or the like.
One object of the invention is to provide a cir
_5 cuit controlling device which will be simple in
' construction, compact in form and may be pro:
duced at a low cost.
A further object of the invention is to provide
it
15
such a device in which the stationary contacts
will be arranged substantially in a common plane
and the movable contactors will be rotatable into
(Cl. 200-?11)
that the invention may take various forms and
may be used for various purposes.
In that embodiment of the invention illustrated
in Figs. 1 to 6 the device comprises a base it
adapted to be mounted on a suitable support, 01
such for example as the frame of an electric motor
shown in Fig. 1. This base is provided with a cir
cumferential flange 2| extending in the direction
of its axis and providing in the outer face of the
base a circular cavity 22, the rear wall of which 10
is preferably flat. Mounted in the base and pro
circuit closing engagement with selected contacts,
jecting into the cavity are a plurality of corn
and which will have means for causing the con
tactors to ?rmly engage all of the selected con~
tacts,
2t, 25,in26,the
21 present
and 28. instance
The number
six, as and
shownv
arrange
at
tacts.
.
A further object of the invention is to provide
such a device which can be adapted to different
uses by changing the arrangement and the elec
trical connections of the stationary contacts and
without substantial structural changes.
Other objects of the invention may appear as
the device is described in detail.
In the accompanying drawings Fig. 1 is a sec
tional view of a portion of
electric motor
' showing my circuit controlling device installed
therein to function as a voltage changer; Fig. 2
is a front elevation, of the circuit controlling de?
vice; Fig. 3 is a front elevation of the base with
the movable member removed; Fig. 4 is a rear
30 elevation of the device. partly broken away; Fig.
5 is a rear elevation of the movable member; Fig.
6 is a section taken on. the line 6-?5 of Fig. 2; Fig.
7 is a diagrammatic illustration of the device as
shown in Figs. 1 to 6; Fig. 8 is a diagrammatic
' illustration of a form of the device adapted to
function as a reversing switch; Fig. 9 is a dia
grammatic illustration of another form of device
adapted to function as a. reversing switch; ?g. 10
is a diagrammatic illustration of a third form
40 of the device adapted to function as a reversing
switch; Fig. 11 is a detail view showing the bridg
ing relation of one of the contactors with one
pair of stationary contacts; Fig. 12 is a front ele
vation, partly broken away, of a modi?ed form
' of the device adapted to control a plurality of
circuits; Fig. 13 is a front elevation, partly broken
away, of another modi?ed form of the device
7 adapted to control a relatively large number of
circuits; Fig. 14 is a section taken on the line
|4--M of Fig. 13: and Fig. 15 is a section taken
on the line l5--l5 of Fig. 13.
In the drawings I have illustrated certain em
bodiments of my invention and have illustrated
the same as adapted for the most part for use
with electric motors but it will be understood
ment of these contacts is determined by the par? 15
ticular use to which the device is to be put. In
the arrangement: here shown the contacts 23 to 25
are terminal contacts rigidly mounted in the
base and provided on the rear side of the base
with binding posts 29, here shown as screws hav- a
ing their heads arranged in cavities 39 formed
in the rear side of the base. The contacts 21 and
28 are not terminal contacts but are electrically
connected one to the other. In the present in
stance they are formed integral with a bar or
jumper 3| embedded in the base. The several
contacts project into the cavity 22 substantially
uniform distances ?so that they are located sub
stantially in a common plane.
A rotatable member 32 is mounted on the base 30
for rotatory movement about an axis extending '
transversely to the plane of said contacts. In the
present instance this movable member isv disk-like
in form and extends into the cavity 22. It is
provided with a central boss 33 which extends into 35
a recess 34 in the base and serves as a guide, the
end of the boss being spaced normally from the
closed end of the recess to permit the movable
member to have axial movement, as well as ro
tary movement, with relation to the base.
The 40
movable member 32 is provided on its rear or in
her surface with contactors? 35 and 3%} which, in
the present instance, are arranged on opposite
sides of the axis of the me-mber'and adapted to
be moved into bridging engagement with se
lected pairs of contacts in the cavity 22. The
movable member is yieldably pressed toward the
stationary contacts and, in the present instance,
the movable member 32 and the base are provided
with alined openings 31 and 38 through which 50
extends a tightly coiled spring 39 which is con.
nected at its outer end with a suitable part
adapted to form a stop, such as a screw 39a the
head
in theofouter
whichside
is preferably
of the movable
locatedmember.
in a recessThe
55
2
2,136,699
other end of the spring is provided with a suit
able loop or eye 4| adapted to receive a pin 42
which extends across the end of the opening 38
in the base and is preferably located in a recess
43 in the rear or inner side of the base.
In as
sembling the device the spring is inserted through
the alined openings and a suitable implement en
gaged with the eye 4| and the spring stretched
to move the eye beyond the end of the opening
10 38 and thus permit the pin to be inserted, after
which the spring is released and the pin engages
the shoulder at the rear end of the opening 38
to hold the spring under tension. This spring
forms the sole connection between the movable
15 member 32 and the base and thus serves not only
as a pressure device but also as a pivot for the
movable member. The disk-like movable mem
ber 32 is of a diameter less than the diameter of
the cavity 22 and the boss 33 is of a less diameter
than the recess 34, so as to provide a clearance
and the two windings will be connected in series.
When the contactors 35 and 36 are in the posi
tion shown in dotted lines in Fig. 7, where the
contactor 35 connects contacts 23 and 26 and
the contactor 36 connects contacts 24 and 25,
the current from the side 45 of the line will di
vide at contact 24 and a part of that current
will flow through the winding 47, contact 23, con
tactor 35, and contact 26 to the side 46 of the
line, the other part of the current will flow
through the contactor 36, contact 25, winding
48, and contact 26, to the side 46 of the line,
thus connecting the two windings in parallel.
It is desirable that the movable member should
have but two operative positions and that it
should be positively prevented from moving sub
stantially beyond either operative position. In
the present construction the ?ange 2| of the base
has a portion of its edge cut away to provide a
recess 49 and the ?nger piece 44 is provided with
between the movable member and the base which
an extension 50 which extends into that recess,
will enable the movable member to have a slight '
the ends of the recess forming stops which posi
lateral movement with relation to the base and
to tilt about an axis transverse to the axis of
rotation, in all directions, and thus permit the
contactors 35 and 36, under the in?uence of the
tively limit the rotatory movement of the movable
member 32 in both directions. Preferably the
base is provided with indicating marks, such as
the numbers 110 and 220. with which cooperates
central springr 39, to adjust themselves to the
a suitable pointer carried by the movable mem
ber and which,.in the present instance, is formed
by the tapered end 5! of the ?nger piece 44.
When the movable member is at one limit of its 30
rotatory movement the pointer will be directed to
ward the number 220. indicating that the wind
selected stationary contacts and'to engage the
respective contacts with substantially equal re
30 silient pressure. Preferably the contacts which
are to be bridged by the contactors have their
contact surfaces inclined so that they converge
toward the end wall of the cavity 22 and. as here
shown, the terminal contacts 23 to 26 have frusto
35 conical ends and the jumper contacts 2'! and 28
are in the form of lugs beveled on one edge. The
contactors 35 and 36 are of such length that
they will enter the space between the contacts
which are to be bridged and their ends are prefer
ably beveled or rounded to enable them to engage
the converging contact surfaces of the stationary
contacts with a camming or wedging action which
provides a very ?rm engagement therewith.
When the movable member is rotated, as by
45 means of a ?nger piece 44, each movable con
tactor will ride up the inclined surface of one
of the contacts with which it is in engagement
and move across the end of that contact toward
another bridging position, and as soon as the in
50 clined ends of the contactors overlap the inclined
surfaces of the selected stationary contacts the
contactors will be moved by the spring 39 into ?rm
engagement with said inclined surfaces, with
ings are connected for operation on 220 volts. and
when the movable member is at the other limit of
its rotatory movement the pointer will be directed 35
toward the number 110. indicating that the wind
ings are connected for operation on 110 volts.
If desired, the device when installed on the motor
may be enclosed by a suitable housing which will
exclude dirt and combustible gases and is here 40
shown as a hollow cap 52 having screw threaded
connection with the motor frame.
In Fig. 8 I have illustrated an arrangement
of the device adapted for reversing the direction
of ?ow of the current through an electric motor
or other electrical power translating device. In
this embodiment the construction and arrange
ment of the base. movable member and contac
tors is substantially identical with that heretofore
described and the same number of stationary con?,
tacts are employed in substantially the same ar
rangement but have different electrical connec
tions. As there shown, the contact 54 is connect
what is in e?ect a snap action, the inclined or
ed with one side 55 of the main line and the con?
cam surfaces of the contacts serving to accurately
position the contactors with relation thereto.
In the particular embodiment illustrated in
Figs. 1 to 6 the contacts are arranged for use as
a voltage changer and are connected in circuits
60 as shown in Fig. '7. As there illustrated the con
tact 24 is connected with one side 45 of a main
current supply line and the contact 26 is con
nected with the other side 46 of said main line.
The contacts 23 and 24 are connected with the
respective ends of one of the motor windings 41
and the contacts 25 and 26 are connected with
the respective ends of a second motor winding
48. With the contactor 35 in engagement with
the contacts 23 and 21 and the contactor 36 in
engagement with the contacts 25 and 28, as shown
in full lines in Fig. 7, the current will ?ow from
the line 45 through contact 24, winding 4}?, con
tact 56 is connected with the other side 5'.? of the
main line. The contact 58 is connected with one
end of a motor winding 59 and the contact 60 is
connected with the other end of that motor wind~
ing. The contact 6| is connected with the con?
tact 60 by a ,iumper 62 and the contact 63 is con
nected with the contact 56 by a jumper 64. When
the contactors, indicated at 65 and 66, are in the
full line positions shown in Fig. 8, in which the
contact 54 is connected with the contact 58 and
tact 23, contactor 35, contact 27, jumper 3|, con
tact 28, contactor 36, contact 25, winding 48 and
contact 26 to the other side 46 of the main line
the contact 56 is connected with the contact 66,
the current from the side 55 of the line will ?ow
through the contact 54, contactor 65, contact 53,
through the winding 59 in the direction of the
full line arrow, through the contact 69, contactor
5s and contact 56 to the other side 51 of the main "
line. When the contactors are shifted to their
dotted line positions, to connect the contact 54
with the contact 6|, and the contact 56 with the
contact 63, the current will ?ow from the side 55
of the main line through contact 54, contactor
3
2,136,699
65, contact BI, jumper 62, contact 69, through the
direction, current ?owing through the main wind
winding 59 in the direction of the dotted line
arrow, contact 58, jumper 64, contact 63, con
tactor 66, contact 56 to the side 51 of the main
ing in the same direction in both positions of
the contactors. When the contactors are in
intermediate positions, in which they would re
spectively engage the contacts SI and 89 only,
line, thus causing the current to ?ow in a re
verse direction and reversing the direction of
operation of the motor.
In Fig. 9 I have shown another arrangement of
contacts in which the current may be reversed
all circuits are broken and the motor is idle.
In Fig. 12 I have shown another form of the
device which is adapted to simultaneously con
nect a plurality of contacts in selected pairs.
10 by the use of four contacts only. As there shown,
The base 29 and rotatable member 32 are sub
the contact 6'! is connected to one side of the
main line 68 and the contact 69 is connected
with the other side ?I9 of the main line. The
contact ?H is connected with one end of the
15 winding ?I2 and the contact ?I3 is connected with
the other end of that winding. When the con
tactors ?I4 and 15 are in their full line positions
the current will flow from the side 98?of the main
stantially identical with those heretofore de
scribed. The base may be provided with any
suitable number of contacts, preferably arranged
in circular series. As here shown, the contacts
line through contact 61, contactor ?I5, contact "I3,
and through the winding 12 in the direction of
the full line arrow, through contact ?II, contactor
?I4, and contact 69 to the side '19 of the main line.
When the contactors are moved to their dotted
line positions the current will ?ow from the line
68 through contact 61, contactor ?I5, contact 'II,
through the winding 12 in the direction of the
dotted line arrow, through contact 13, contactor
?I4 and contact 89 to the side ?I9 of the main line.
In Fig. 10 I have illustrated another arrange
ment constituting a reversing switch for a motor
of that type which embodies a main winding and
two starting windings, the latter being so ar
ranged that when energized one of them will
start the motor in one direction and the other
will start the motor in the other direction. In
this form the structural features are similar to
those above described, and the base 29 is again
provided with six stationary contacts. The con
tact ?I8 is connected with one end of the main
winding 19, the other end of which is connected
with one side 89 of the main line, and the con
tact BI is connected with the other side 82 of
the main line. The contact 83 is connected
with one end of the starting winding 84, the
other end of which is connected directly with the
side 89 of the main line. The contact 85 is con
nected to one end of a second starting winding 86,
the other end of which is connected directly with
the side 89 of the main line. A contact 81 is
connected by a jumper 88 with the contact ?I8
and the contact 89 is connected by a jumper 99
with the contact 8I. With the contactors 9| and
92 in the positions indicated in full lines, a part
of the current from the main line ?ows through
the main winding ?I9, contact "I8, contactor 92 and
contact 8| to side 82 of?the main line, and an
other part of the current from the side 89 of the
main line will ?ow through the starting winding
are arranged in three groups and each group in
10
15
cludes three contacts, 94, 95 and 96. The circuit
connections for the contacts are not shown as
they will vary according to the use to which the
device is to be put. The rotatable member is pro
vided with three contactors 91 arranged to coop 20
erate respectively with the several groups of sta
tionary contacts, each contactor being of such
length that it will connect the central contact
of each group with either of the other contacts
of that group. When the rotatable member is in
the position shown in Fig. 12 the contacts 94 and
95 of each group will be connected one with the
other and when the rotatable member is moved
clockwise the contacts 95 and 96 will be connected
one to the other. Obviously the number and ar
rangement of the contacts and contactors may be
varied to conform to the particular use to which
the device is to be put.
In Figs. 13, 14 and 15 I have shown a form of
the device adapted to control a relatively large
number of circuits. The base I99 is similar in
construction to the base .29 and is provided with
an outer series of contacts which, in the present
instance, includes three pairs of contacts IN,
and is also provided with an inner series of con
tacts which, as here shown, comprises six con
tacts I92 spaced equal distances apart. Two
pairs of contactors, I93 and I94, and I95 and I96
are provided to cooperate with the respective
series of stationary contacts. In order that the 45
several contactors may adjust themselves into
?rm engagement with the respective pairs of
contacts they are carried by separate rotatable
89, jumper 99, and contact BI to the side 82 of
members. As is shown the outer contactors I93
and I94 are carried by a main rotatable element
I91 which is similar to the rotatable member
heretofore described except that it is provided in
its inner side with a cavity I98. Mounted in this
cavity is a second rotatable member I99 which
is connected with the outer member I91 for rota
tion therewith, as by means of lugs II9 carried
by the inner member and extending into slots I I I
in the outer member. The contactors I93 and
I94 are arranged on diametrically opposite sides
of the axis of the outer rotatable member I 91 and
the contactors I95 and I96 are arranged on di
ametrically opposite sides of the inner rotatable
member I99. The contactors of the two pairs
are arranged in transverse alinement. It will be
obvious, however, that the several contactors may
be arranged in any desired relative positions.
The outer member I0?! is connected with the base
I99 by a coiled spring H2 and the inner member
I99 is connected with the base by a coiled spring
the main line. Thus when the contactors are in
one position the current will flow through one
starting winding to start the motor in one direc
tion and when the contactors are in another posi
II3 of larger diameter than the spring H2 and 70
arranged about the same, both being connected
with the pin I I4 which holds them under tension,
thereby causing each rotatable member to be
tion the current will flow through the other
starting winding to start the motor in the other
separately pressed toward the respective station
86, contact 85. contactor 9|, contact 89, jumper
(50 99 and contact 8! to the side 82 of the vmain line.
When the contactors are moved clockwise to their
dotted line positions a part of the current will
flow from the side. 89 of the mainline through
the main winding ?I9, contact ?I8, jumper 88, con
tact 81, contactor 92 and contact 8! to the side
82 of the main line, and another part of the cur
rent from the line 89 will flow through the start
ing winding 84, contact 83, contactor 9|, contact
ary contacts.
50
55
60
65
The outer rotatable member is or? 75
4
2,136,699
carried by the other of said members, there being
such size as to provide clearance between the same
and the base and thus permit it to tilt in the
manner heretofore described. The inner mem
not less than two or more than three such con
ber I09 is of slightly smaller diameter than the
cavity #08 and the lugs H0 are of smaller size
than the recesses I ll, thereby providing a clear
ance between the two members and permitting
gagement with selected pairs of contacts, each
contactor being arranged to have lateral wedging
both members to tilt with relation one to the
other and with relation to the base, whereby the
10 contactors will automatically adjust themselves
into ?rm engagement with the selected pairs of
contacts.
In the arrangement shown the rotatable mem
bers may be actuated to move one or the other
of the outer contactors � or � into bridging
relation to one or the other or" the outer pairs of
contacts [I]! and when so positioned there will
be no connection between any of the contacts
of the inner series. When adjusted to other posi
tions the inner contactors I85 and $06 will simul
taneously bridge two pairs of contacts [02 of the
inner series and none of the contacts of the outer
series will be connected. It will be understood
of course that the nLLnber and arrangement of
the contacts and contactors may be varied ac
cording to the use to which the device is to be put.
While I have shown and described certain em
bodiments of my invention I wish it to be under
stood that I do not desire to be limited to the de
tails thereof as various modi?cations may occur
to a person skilled in the art.
Having now fully described my invention, what
I claim as new and desire to secure by Letters
Patent, is:
1. In a circuit controlling device, two rigid
members at least one of which is biased toward
the other and one of which is tiltable with rela
tion to the other, a plurality of contacts carried
by one of said members in opposed relation to the
40 other member and adapted to be connected in
pairs, and a plurality of contacts carried by the
other member and provided with not less than
two or more than three pairs of contact surfaces
arranged to engage a corresponding number of
45 pairs of the ?rst mentioned contacts, said con
tacts being shaped and arranged to cause the
contacts on said tiltable member to be wedged
into lateral engagement with the cooperating
contacts on the other member and to permit said
50 tiltable member to have pivotal movement about
two axes with relation to said cooperating con
tacts.
2. In a circuit controlling device, two opposed
rigid members at least one of which is biased
toward the other, a plurality of contacts carried
by one of said members and adapted to be selec
tively connected in pairs, a plurality of contactors
carried by the other of said members, there being
not less than two or more than three such con
60 tactors, one of said members being tiltable to
enable said contactors to have simultaneous en
gagement with selected pairs of contacts, said
contactors and said contacts being shaped and
arranged to permit each contactor to have both
lateral movement and pivotal movement to cause
the same to ?rmly engage both contacts of the
selected pair of contacts, and to permit said con
tactor to have pivotal movement about a second
axis transverse to the axis of the ?rst mentioned
pivotal movement.
3. In a circuit controlling device, two opposed
rigid members at least one of which is biased
toward the other, a plurality of contacts carried
by one of said members and adapted to be selec
75 tively connected in pairs, a plurality of contactors
tactors, one of said members being tiltable to
enable said contactors to have simultaneous en
engagement with the contacts of the selected
pair of contacts and the cooperating contact sur
faces being shaped to permit said contactor to
have pivotal movement about two axes with rela 10
tion to said pair of contacts.
4. In a circuit controlling device, a non-rotata
ble rigid member, a rotatable rigid member
mounted in opposed relation to said non-rotata
ble member for tilting movement with relation 15
thereto, at least one of said members being biased
toward the other member, a plurality of con
tacts carried by said non-rotatable member and
adapted to be connected in pairs, a plurality of
contactors carried by said rotatable member and
each adapted to bridge a pair of said contacts
and each contactor being arranged to have lat
eral wedging engagement with the bridged con
tacts at points spaced from the bottoms thereof
and having its contact surfaces curved substan 25
tially about a common axis transverse to the axis
of rotation of said rotatable member.
5. In a circuit controlling device, two opposed
rigid members biased one toward the other, con
tacts carried by one of said members, contractors 30
carried by the other member and each adapted to
bridge a pair of contacts on the ?rst mentioned
member, one of said members being tiltable with
relation to the other member and said contacts
and said contactors being so shaped that each
point of engagement will comprise a narrow
arcuate surface arranged to permit said tiltable
member to move about two intersecting axes,
whereby all of said contactors may be brought
into ?rm engagement with both contacts of the 40
respective pairs of contacts.
6. In a circuit controlling device, a base, a plu
rality of stationary contacts mounted on said base
and arranged to be connected in pairs, a member
biased toward said base and mounted for rotary 45
movement and for axial movement with relation
thereto, and contactors carried by said member
and movable thereby into bridging relation re
spectively with selected pairs of stationary con
tacts, the stationary contacts of each pair being 50
arranged to permit the bridging contactor to en
ter the space between them and said member
being tiltable about a plurality of axes to cause
said contactors to engage the respective contacts
with substantially equal pressure.
?7. In a circuit controlling device, a base, a plu
rality of stationery contacts mounted on said base
substantially in a common plane and arranged
to be connected in pairs, the contacts of each pair
having surfaces converging toward said base, a 60
member mounted on said base for both rotatory
and axial movement with relation thereto, con
tactors mounted on said member and movable
thereby into a position between and in engage
ment with the converging surfaces of selected 65
pairs of contacts, and means for yieldably press
ing said member toward said base, said member
being free to so adjust itself that said contactors
will have ?rm engagement with each contact of
the respective pairs of contacts.
8. In a circuit controlling device, a base. a plu
rality of stationary contacts mounted on said base
substantially in a common plane and arranged to
be connected in pairs, the contacts of each pair
having contact surfaces converging toward said
2,136,699
base, a member mounted on said base for both
?rotatory movement and axial movement with
relation thereto, a plurality of contactors carried
by said member and movable thereby into engage
ment respectively with the converging surfaces
of selected pairs of contacts, said member being
5
respectively with different parts of the motor
circuit, a third pair of contacts mounted on said
base and connected one with the other, a member
mounted on said base for rotatory movement
with relation thereto, and contactors carried by
said member and movable by the rotation of said
tiltable about a plurality of transverse axes to
enable said contactors to have simultaneous en
vmember into a position to connect the two con
gagement with the contacts of the respective pairs
the other, or into a position to connect one con
tact of each of said ?rst mentioned pairs with the 10
10 of contacts, and a spring acting on said member
to press said contactors toward said contacts.
9. In a circuit controlling device, a base, a plu
rality of contacts mounted on said base, a mem
ber mounted on said base for? limited rotatory,
axial and lateral movement with relation thereto
and for tilting movement about a plurality of
transverse axes, contactors carried by said mem
ber and movable thereby respectively intobridg
ing relation to selected pairs of contacts, the con
20 tacts of each pair being arranged to enable the
bridging contactor to engage the same with a
Wedging action to move about two intersecting
?axes with relation thereto, and yieldable means
for pressing said member toward said base and
imparting, thereto such lateral and tilting move
ments as may be required to provide substantially
equal contact pressure of said contactors on each
contact. of the selected pairs of contacts.
10. In an electric switch of the conventional
multiple pole double throw type, two elements
arranged in operative relation one to the other,
a plurality of contacts rigidly secured to each
element, the contacts on at least one of said ele
ments having inclined contact surfaces, said ele
ments being biased one toward the other and
tacts of each of the ?rst mentioned pairs one with
respective contacts of said'third pair, said mem
ber and said base having parts cooperating to
positively prevent the movement of said mem
ber beyond either of said positions.
14. In a voltage changer for an electric motor 15
or the like, a base, a plurality of contacts mount
ed on said? base substantially in a common plane,
a part of said contacts having means for con
necting the same in a motor circuit, and a part
of said contacts being permanently connected
one with the other, a member mounted on said
base for rotatory movement
verse to said plane, and
carried by said member and
tion thereof into bridging
about an axis trans
bridging contactors
movable by the rota
relation to selected 25
pairs of contacts, said ?contactors being movable
transversely to said plane with relation one to
the other to enable each contractor to ?rmly
engage said contacts.
15. In a voltage changer for an electric motor 30
or the like, a base, a plurality of contacts mounted
on said base substantially in a common plane, a
part of said contacts having means for connecting
the same with the motor circuit, and a part of said
contacts being permanently connected one with 35
being relatively movable to effect selective engage
ment between the contacts carried by the respec
the other, a member mounted on said base for
rotatory movement about an axis transverse to
tive elements, one of said elements being tiltable
about a plurality of transverse axes to enable said
engagement to be e?ected with substantially
equal pressure at each point of contact engage
ment.
11. In an electric switch of the conventional
. multiple pole double throw type, a normally sta
ber being tiltable with relation to said base and
the contacts of each pair being arranged to per
tionary element, a plurality of pairs of contacts
rigidly secured to said, element, a second element,
and a plurality of contactors secured to said sec
ond element, saidsecond element being rotatable
to engage said contactors with selected pairs of
contacts on said stationary element, the contacts
of each pair being arranged to permit the en
gaging contactor to? enter the space between the
same and said second element being biased to
ward said stationary element, one of said elements
being tiltable about a plurality of transverse axes
to cause said contactors to engage each contact
of the selected pairs of contacts with substantially
equal pressure.
12. In a voltage changer for an electric motor
60 or the like, two pairs of contacts mounted on said
base and having means for connecting the same
respectively with different parts of the motor
circuit, a third pair of contacts mounted on said
base and connected one with the other, a member
mounted on said base for rotatory movement with
relation thereto, and contactors carried by said
member and movable by the rotation of said
member into a position to connect the two con
tacts of each of the ?rst mentioned pairs one
70 With the other, or into a position to connect one
contact of each of said ?rst mentioned pairs with
the respective contacts of said third pair.
13. In a voltage changer for an electric motor
or the like, two pairs of contacts mounted on said
base and having means for connecting the same
said plane, contactors carried by said member
and movable by the rotation thereof into bridging
relation'to selected pairs of contacts, said mem
mit thebridging contactor to enter the space be
tween the same, and a spring acting on said
member to press the latter into engagement with
the respective contacts.
16. In a reversing switch, a base, a plurality
of contacts mounted on said base substantially
in a common plane, part of said contacts having
means for connecting the same ina circuit, and
another part of said contacts each being perma
nently connected with another contact,~a mem
ber mounted on said base for rotation about an
axis transverse to said plane, contactors carried
by said member and movable by the rotation 55
thereof either into positions to connect the ?rst
mentioned contacts in pairs independently of the
last mentioned contacts, or into positions to con
nect the last mentioned contacts respectively with
contacts of the ?rst mentioned part, and means 60
for maintaining said contactors in ?rm engage
ment with selected contacts.
17. In a reversing switch, a base, a plurality of
pairs of contacts mounted on said base substan
tially in a common plane, two pairs of said con, 65
tacts having means for connecting the same in a
circuit and a third pair of said contacts being
permanently connected with contacts of the re
spective ?rst mentioned pairs, a member mounted
on said base for rotation about an axis transverse
to said plane, contactors carried by said mem
ber and movable by the rotation thereof either
into bridging relation to the contacts of the re
spective ?rst mentioned pairs or into bridging re
lation with one contact of each of the ?rst men 75
6
2,136,699
tioned pairs and the respective contacts of said
thereby into bridging relation to selected contacts
third pair, and means for maintaining said con
tactors in ?rm engagement with selected contacts.
18. In a reversing switch, a base, a plurality of
pairs of contacts mounted on said base substan
tially in a Common plane, two pairs of said con
tacts having means for connecting the same in a
circuit and a third pair of said contacts being
permanently connected with contacts of the re
of one series, a second member mounted on said
base and connected with the first mentioned
member for rotatory movement therewith, and _
spective ?rst mentioned pairs?, a member mounted
on said base for rotation about an axis transverse
to said plane, contactors carried by said member
and movable by the rotation thereof either into
bridging relation to the contacts of the respective
?rst mentioned pairs or into bridging relation with
one contact of each of the ?rst mentioned pairs
and the respective contacts of said third pair, said
member being tiltable with relation to said base
and said contacts being arranged to permit the
bridging contactor to enter the spaces between the
same, and means for yieldably pressing said mem
ber toward said contacts.
19. In a reversing switch, a base, three pairs of
contactors carried by said second member for
movement thereby into bridging relation to se
lected contacts of the other series, said members
being biased toward base and being separately
tiltable with relation to said base, and said con
tactors and said contacts being shaped and ar
ranged to cause said contactors to engage the
respective contacts with a lateral wedging action
which will permit the contactor to move about
two intersecting axes.
21. In a circuit controlling device, a base, a Q?
plurality of contacts mounted on said base and
arranged in two series, a member mounted on
said base for rotatory movement with relation
thereto, contactors carried by said member and,
movable thereby by bridging relation to selected
contacts of one series, a second member mounted
on said base and connected with the ?rst men
contacts mounted on said base, the ?rst and sec
tioned member for rotatory movement therewith,
contactors carried by said second member for_
ond pairs of contacts having means for connect
movement thereby into bridging relation to se- ~'
ing the same in a circuit and the contacts of the
lected contacts of the other series, said members
third pair being separately and permanently
connected with the respective contacts of the
being tiltable with relation one to the other and
?rst pair, a member mounted for rotatory move
pressing said members toward the contacts of the
30 ment with relation to said base, two contactors
carried by said member and movable thereby into
bridging relation to selected contacts, said con
tacts being so arranged that when said member
is in one position one of said contactors will con
nect the contacts of the ?rst pair one to the other
and the other contactor will connect one contact
of the third pair with one contact of the second
pair, and when said member is in another position
the last mentioned contactor will connect said
contact of the third pair with the other contact
of the second pair and the first mentioned con
tactor will connect with the other contact of
the third pair with that contact of the ?rst pair
with which it is not permanently connected, and
means acting on said member to cause said con
tactors to engage each of said contacts with sub
stantially equal pressure.
20. In a circuit controlling device, a base, a plu
rality of contacts mounted on said base and ar
ranged in two series, a member mounted on said
base for rotatory movement with relation thereto,
contactors carried by said member and movable
with relation to said base, and spring means for
respective series.
22. In a circuit controlling device, a base pro
vided in one side thereof with a circular cavity,
two series of contacts mounted on said base and
extending into said cavity, a disk-like member
mounted in said cavity for rotatory movement,
axial movement and tilting movement with rela
tion to said base, said member having a cavity
in its inner side, contactors carried by said mem
her and movable thereby into bridging engage
ment with selected contacts of one series, a second =10
member mounted in the cavity in the ?rst men
tioned member for axial and tilting movement
with relation to said ?rst mentioned member and
to said base and connected with said ?rst men
tioned member for rotatory movement therewith,
contactors carried by said second member and
movable thereby into bridging engagement with
selected contacts of the other series, and separate
springs acting on the respective members to press
the same toward said contacts.
GEORGE H. LELAND.
50
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