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Jul)’ 11, 1950
Filed May 17, 1946
2 Sheets-Sheet 2
Patented July 11, 1950
Joseph M. Tyrner, New York, N. Y., assignor to
Air Reduction Company, Incorporated, a cor
poration of New York
Application May 17, 1946, Serial No. 670,322
2 Claims. (Cl. 200-16)
This invention relates to electric switches, and
more particularly to improvements in multiple
switches, the principal object of the invention be
ing to provide switch mechanism consisting of
parts so constructed and arranged that a single
switch operating device may be employed for
closing and opening any desired number of switch
My improved switch mechanism may be char
acterized as a multiple switch assembly compris
ing any desired number of standardized units,
each unit comprising a support for a pair of elec
trical contacts, a movable bridge contact member
for bridging each pair of contacts, and a bridge
Fig. 6 is va horizontal section view taken on
line 6-6 of Fig. 1;
Fig. 7 is a horizontal section view taken on line
1-4 of Fig. 1;
Fig. 8 is a horizontal section taken on line 8—8
of Fig. 1;
Fig. 9 is a development, on a reduced scale, of a
contact element forming a part of the mechanism
of Figs. 1-8, inclusive;
Fig. 10 is a development, on a reduced scale,
of another form of contact element employed in
‘ the apparatus of Figs. 1-8, inclusive; and
Fig. 11 is a development, on a reduced scale, of
still another form of contact member forming a
support for each bridge member. Any desired 15 part of the apparatus illustrated in Figs. 1-8, in
number of such units may be assembled in super
imposed relation so that the several bridge mem
In the typical embodiment of my invention
bers may be operated simultaneously by a com
illustrated in the accompanying ‘drawings, the
mon operating device such as the solenoid and
multiple switch mechanism comprises several
plunger or armature ordinarily employed for the 20 pairs of stationary electrical contacts I, la, lc,
etc., each pair of stationary contacts being car
purpose of operating an electromagnetic switch.
ried by a contact support 2, 2a, 20 and 2d, made of
One of the objects of this invention is to pro
any suitable insulating material. Each contact
vide an improved construction and arrangement
support, for example, the contact support shown
of the switch actuating means such that each
bridge member is moved into bridging engage
ment or contact with a corresponding pair of sta
25 at 2, may include a main contact supporting plate
3 having a central opening 4, and a separate
spacer disk 5 provided with a pair of terminal
sockets 6 for receiving terminal ?xtures (here
in yielding engagement with these contacts to as
inafter described in detail) for connecting each
sure ?rm contact regardless of irregularities in
30 of the stationary contacts to the external elec
the contact surfaces.
tric circuit leads.
Another object- of this invention is to provide
A separate bridge member shown at ‘l, 70 and
means for moving the bridge members positively
M is provided for each pair of contacts l, id and
to open circuit position, each bridge member be
lo. These bridge members are metal bars or
ing mounted between a pair of bridge supports
carrying contacts 8 at their extremities
in such a manner that positive movement of
adapted to engage the stationary contacts car
tionary contacts, the bridge member being held
each bridge member is assured, not only when
the bridge members are moved to closed cir
cuit position, but also when the switch actuating
ried by the stationary contact supports 2, 2a
and 20.
Each bridge member is provided with what may
means moves toward the open circuit position.
be called a bridge support 9 comprising a body of
A typical embodiment of my invention is illus 40
insulating material lo having an annular recess
trated in the accompanying drawings in which:
therein and a coil spring ll mounted in the re
Fig. 1 is a vertical section view of a multiple
cess of the member it and engaging the lower
switch made in accordance with my invention,
surface of the adjacent bridge member ‘I, and it
this section view being taken on line l-—! of
45 will be noted that each bridge member is mount
Fig. 3;
Fig. 2 is an elevation, partly in section, showing
ed between the bridge support engaging the low
er surface thereof and the bottom of the bridge
the switch mechanism of Fig. 1 with the switch
support directly above the bridge member.
contacts in closed circuit position;
The several stationary contact supports 2, 2a,
Fig. 3 is a bottom plan view of the multiple 50 20 and 2d are mounted in superimposed relation
switch shown in Figs. 1 and 2;
and it will be understood that any desired num
Fig. 4 is a side elevation of the switch shown in
ber of such contact supports can be arranged to
Figs. 1 and 2;
form a stack of contact support members
Fig. 5 is a section view taken on line 5-5 of
clamped together by any suitable detachable
Fig. 1;
05 means such as the through bolts l2 and I3. A
corresponding number of bridge supports, mount
tion 23" and integral sections 33 and 34, and
ed in the central openings in the several contact
supports, are likewise arranged in superimposed
relation and are ?rmly and non-yieldably secured
together by a central bolt I4 having a nut IS
in engagement with the bottom bridge support 9c.
This central bolt I4 is secured to the armature
I6 of an electromagnet having a coil shown at
ill and a laminated ?eld yoke I8. A bracket I9
is secured to the bottom of the stack of contact
supports by means of the through bolts I2 and I3
the section 34 may be bent at an angle to the
contact section 23" so as to project into a
rectangular terminal ?xture 35 carrying set
screw 36, the construction and arrangement be
ing such that when the set screw 36 is tightened,
the section 34 of the contact piece Ic is clamped
against the base of the terminal ?xture 35. It
will be understood that the three set screws 29,
32 and 36 serve to connect the stationary contacts
of the switch mechanism with the external lead
and this bracket carries a coil spring 20 engag
wires (not illustrated).
ing a disk or washer 2| retained on the central
It will be understood from the foregoing de
bolt I4 by a nut 22.
scription that, as indicated by the broken lines
ri‘he operation of the switch mechanism illus
in Figs. 1 and 2, any desired number of stationary
trated in the accompanying drawings is best - contact supports, bridge members and bridge
illustrated in Figs. 1 and 2, Fig. 1 showing the
supports may be employed, these elements be
open circuit position of the several elements of
ing arranged in superimposed relation. Thus, the
the switch mechanism and Fig. 2 showing the
number of circuit connections controlled by the
closed circuit position. When current ?ows 20 switch mechanism may be readily increased by
through the magnetizing coil I1 of the electro
detaching or disconnecting the bolts I2, I3 and
magnet, the armature I6 is attracted to draw the
the central actuating bolt 84 and then adding ad
central bolt I4 upward and it will be understood
ditional contact supports, bridge members and
that this movement of the central bolt lifts the
bridge supports. In making such change, it is
several bridge supports 9-90 to move the sev 25 merely necessary to employ longer through bolts
eral bridge members 'I--'lc into engagement with
l2 and i3 and a longer central actuating bolt it,
the several pairs of stationary contacts l-ic in
to accommodate the larger number of contact
supports and bridge supports.
a direction transverse the contacting surfaces of
the stationary contacts. The parts are so con
It is to be understood that my invention is not
structed and arranged that the central actuating 30 limited to the particular embodiment thereof il
bolt l4 travels further than the several bridge
lustrated in the accompanying drawings but in
members l-lc whereby the several bridge mem
cludes such modi?cations thereof as fall within
bers are held in yielding engagement with the
the scope of the accompanying claims.
I claim:
stationary contacts by the action of the coiled
springs II. When the supply of current to the 35 1. An electric switch comprising a stack of
magnetizing coil I1 is interrupted, the spring 20
contact supports, detachable means for clamping
said supports together in superimposed relation
at the bottom of the switch mechanism causes
the central actuating bolt I4 to move downward,
whereby any desired number of contact supports
this action being assisted by gravity if the swtlch
may be clamped together, a pair of stationary
mechanism is mounted in vertical position as 40 contacts carried by each support, a separate
illustrated in the drawings. If there is any tend
bridge member for interconnecting the con
ency of the‘ bridge member contacts 8 to stick
tacts of each pair, and a common actuating
member for the several bridge members whereby
to the stationary contacts I, such sticking of
all bridge members may be moved simultaneously
these elements is prevented by the positive action
toward the said pairs of contacts, said actuating
of the several bridge support elements, the bot
member comprising a stack of bridge supports
tom portions of which strike the upper surfaces
and detachable means for clamping said bridge
of the bridge members and force these bridge
supports together whereby any desired number of
members down until they occupy the position
bridge supports may be clamped together, said
shown in Fig. 1.
In Figs. 9, 10 and 11. I have illustrated on a 50 bridge supports each comprising spring means
for engaging a bridge member, and an abutment
reduced scale, developments of three different
for engaging with another bridge member, where
forms of stationary contacts I, la and I 0. These
by each bridge member is supported between the
?gures show these contact members in an inter
abutment of one bridge support and the spring
mediate stage of manufacture, i. e., before por
tions thereof are bent to the ?nal shape which 55 member of another bridge support.
2. An electric switch comprising a stack of
is best illustrated in Fig. 4, and before the
contact supports, detachable means for clamping
threaded opening is formed in the contact piece
said supports together in superimposed relation
6 to accommodate a terminal set screw.
whereby any desired number of contact supports
Referring particularly to Figs. 4 and 9, it will
be noted that the contact piece I has a portion 60 may be clamped together, a pair of stationary
contacts carried by each support, a separate
23 which forms the electrical contact proper,
bridge member for interconnecting the contacts
adapted to be engaged by the bridge member ‘I.
of each pair, and an actuating member for si
This contact piece also has integral sections 24,
multaneously moving the several bridge mem
25, 2B, 2? and 28 which may be bent successively,
as indicated by the dotted lines in Fig. 9, to form 65 bers said actuating member comprising a plu
rality of superimposed bridge supports each hav
a box-shaped terminal ?xture as best shown in
ing an annular recess therein, a coiled spring
Fig. 4, the section 27 having a threaded opening
mounted in the recess of each bridge support for
formed therein to receive the terminal set screw
engaging a bridge member, and detachable means
29. ri‘he sections 2d and 28 may be spot welded
together as illustrated in Fig. 4. The contact 70 for clamping the several bridge supports to
gether whereby any desired number of bridge
piece Ia shown in Figs. 4 and 10, has a contact
supports may be clamped in superimposed rela
section 23' and a short extension 30 which may
be spot welded to a rectangular terminal ?xture
3i carrying a set screw 32. The contact piece to
as illustrated in Figs. e and it has a ccntact sea:
(Reterences on following page)
The tollowlng references are of record in the
?le of this patent:
McGary __________ __ Dec. 8,
Van VaJkenburg _-___ June 7,
Carpenter ______ __... Feb. 14,
Ketay _-.._..; _______ __ July 3,
1910 .
1984 10
Parsons ........... __ Aug. 4, 1936
Unwln ___________ __ Jan. 25, 1938
Glenn ___________ __ May 18, 1943 ‘
Stong ____________ __ Mar. 21, 1944
Johnson __________ __ Oct. 12, 1948
France __________ __ Sept. 17, 1920
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