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Патент USA US3092710

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June 4, 1963
3,092,700
1_ A_ COHEN
ELECTRICAL RELAYS
2 Sheets-Sheet 1
Filed July 7, 1960
6_T3
2l
59)
JNVENTOR.
/r win A. Cohen
Y
June 4, 1963
l. A. COHEN
3,092,700
ELECTRICAL RELAYS
Filed July 7, 1960
2 Sheets-Sheet 2
INVENTOR
/rw/n A. Cahen
l „ß
United States Patent O?ce
Patented June 4, 1963
2
i
extending terminal posts 28, 39, and 54 and hollow tubes
53 are disposed and secured. Thus, header assembly 31
forms an air tight closure to relay shell 30.
3,092,700
Irwin A. Cohen, Chicago, Ill., assigner to Automatic
o
3,092,700
ELECTRICAL RELAYS
The details as well as the arrangement of contact
springs 27 lare shown in FIGURE 2 and FIGURE 3.
tion of Delaware
Contact springs 27, made of resilient material and biased
Filed July 7, 1960, Ser. No. 41,297
as a result of being formed, are radially arranged about
6 Claims. (Cl. 200-87)
the axis of the relay on terminal posts 28 disposed within
glass section 32. At> one end of the generally fork shaped
My invention relates to electrical relays, .and'more
particularly to High-G or highly shock resistant relays, 10 contact spring 27 there is a mounting loop which permits
contact spring 27 to be slipped over the inwardly extend
particularlyfof the kind mounted in a cylindrical shell.
ing portion of the terminal posts 28 and welded thereto.
Prior art relays of this type encounter relatively high
At the other end of contact spring 27 is an extend-ing cen
reluctance between the armature and pole pieces ydue to
tral finger portion 33 which is engaged by a glass beaded
the air gaps between the cooperating lfaces. In addition
these relays depend solely on single contacts as opposed to 15 pin 26 extending from an actuator plate 25. Central
linger portion 33 is flanked by two cont-act por-tions 3‘4 and
twin contacts, therefore, relay `failure is incurred once the
35 having on their front and back sides contact elements
sole contact becomes contaminated or dam-aged. f ‘Fur
36. These contact elements 36 cooperate with corre
thermore, when adjusting these relays the contact springs
sponding stationary contact ele-ments 37 and 38 respec
themselves require adjusting. My invention is designed
to minimize these shortcomings.
20 tively, mounted on terminal posts 39 also disposed within
and extending from glass section 32 of header disc 31.
Therefore, »it is an object of my invention to provide a
rI'he electromagnet generally consists of elements shown
relay of the above kind having an armature of a design
in FIGUR-E 4, wherein a round magnetic core 1‘1 is posi
resulting in a minimum amount of reluctance, and thus
tioned normal to the axis of the relay casing, and support
operative with a minimum amount of electrical power.
Another object of my invention is to provide a relay 25 ed at the ends by being attached to pole pieces 12 and 13
which extend parallel to the relay axis. This assembly,
having a spring contact arrangement that will be most
comprising of pole pieces 12 and 13 and core 11, is se
reliable and sensitive.
cured within the relay casing lby mounting, with use of tie
Another object of my invention is to provide a relay
pins 16, 17, 18 and l19, a cross-bracket '15 at one end of
having a Contact spring actuating means which can be
adjusted for correct engagement with the contact springs 30 pole pieces 12 and 13 and an hour-glass bracket 14 at the
opposite end, and thereafter welding cross-bracket 15 to
thereby eliminating the more difficult adjustment on the
Electric Laboratories, Inc., Northlake, Ill., a corpora
contact springs themselves.
the casing. Therefore, hour-glass'bracket 14 which is
, My invention as herein disclosed features in general
a cylindrical shell closed at one end with a header disc,
positioned at the closed end of shell 30 supports the as
closure of the »other end.
in the relay and from any relative movement.
vsembly whereas cross-bracket 15 positioned at the opposite
holding externally protruding terminal posts forming the 35 Vend of the pole pieces ‘12 and `13 locks the assembly with
Within this shell a core holding
a coil is transversely disposed having pole pieces placed
~ Hour-glass bracket "14 which conforms to two segments
of a circular plate connected at their apex has three
at its ends so as to extend parallel to the axis of the shell.
apertures; two of which are used for the insertion of tie
Surrounding the coil is a window type >armature that ro
tates about the axis of the shell in a predetermined arc 40 pins 18 and 19, and the third used to center a bearing
between the pole pieces and a set of permanent magnets.
These magnets are mounted at the. closed end of the
shell. Upon one of the armature cross-legs a circular
actuator plate is mounted, holding adjustable glass-beadedí
pins, which engage with the contact springs. The con
tact springs are mounted to the terminal posts and are
operative between station-ary contacts also mounted to
terminal posts.
`
These and other objects and features of my invention
will become more apparent from a more Idetailed consid
eration of its description taken in connection with the
accompanying drawings of which:
FIGURE 1 is a side elevation View of a relay em
bodying the features of this invention.
‘
.
pin lil. Furthermore, extending from hour-glass bracket
14 are two studs 40~which are used to space hour-glass
bracket 314 »from the closed end of shell 30 and thereby
provide space for rotation of a cross-leg of armature 20;
Cross+bracket 15 also has three apertures; two of which
are used for the insertion of tie pins y16 and 17, and the
third used to center the opposite bearing pin 42. More
over, cross-bracket 115 has four~ arm-s with turned-up ends
which extend to the inner surface of the casing thereby
50 providing substantial surface area for welding them to
the casing,
Mounted to core 11 and positioned between pole pieces
l12 and :13 is a coil which is hermetically sealed within
a metal cylindrical-shaped enclosure 10. Enclosure 10
rFIGURE 2 is a perspective view of a glass beaded pin 55 as shown in FIGURE 5 comprises an inner sleeve 52
carrying coil 50, an outer sleeve 57 surrounding coil 50,
of the actuator plate engaging with a -contact spring.
and end pieces 51 forming a closure thereto. Extend
FIGURE 3 is a sectional view of the header disc of the
ing from -outer sleeve `57 are two coil windings lead-out
relay as viewed from lines 3_3, with the stationary
terminals 55» through which the ends of coil winding 56
and movable contacts mounted thereon.
FIGURE 4 is an exploded perspective view of elements 60 extend. These ends are soldered within hollow tubes
of the electromagnetic device and how they relate to
53 which are strapped to terminal posts 54, both of which
are disposed within glass section 32. The hermetical
each other.
FIGURE 5 is an exploded perspective view of a coil
seal provents organic gases from escaping from the coil
and ,contaminating contact springs 27 causing thereby a
4and an enclosure therefor.
Referring now in «detail to the drawings, FIGURE l 65 possible inefficiency in the relay operation.
designates in general a relay assembly comprising the
Surrounding this hermetically sealed coil and brackets
casing, the contact springs, and the electromagnet. More
specifically, the relay casing Vconsists of an outer cylindri
14 and 15 is a window type armature 20 which rotates
about the axis of the relay casing. Armature 20 having
upright legs and cross-legs is mounted by means of the
cal shell 30 which is closed at one end :and has a flange
at the open end thereof. Mounted against this ilange is a 70 inwardly extending bearing pins 41 and 42 of the cross
corresponding flange of a header assembly 311 which has
a circular aperture ñlled with a glass section 32 wherein
legs being journaled by the center apertures of cross
bracket 15 and hour glass bracket 14. Rotational travel
3
3,092,700
of armature 20` is limited by pole pieces 12 and 13` at one
end and permanent magnet assemblies 58 and 59 at the
other end. The effect of this limitation is that faces 20A
and 20B of the two upright legs, cooperate with corre
sponding faces 12A and 513A of pole pieces 12 and 13
upon energizing of the coil, and permanent magnet as
semblies 58 and 59 cooperate with faces 20C and 20D
of one of the cross-legs upon deenergizing of the coil.
Faces 20A and `20B are parallel with each other and
equal distance from the axis of rotation.
4
Upon deenergizing of the coil the biased contact
springs 27 move to the opposite stationary contacts or
the restored position thereby moving the armature 20
against the permanent magnet elements 23 and 24.
These elements 23 and 24 prevent the armature from
rebounding and also serve as back stops.
My invention has been described in detail, however,
it is understood that the present disclosure has been made
only by way of example and that numerous changes in
They are so 10 the detail and structure may be made without depart
formed t-o remain substantially parallel with faces 12A
ing from the scope of my invention as hereinafter claimed.
and `13A over the entire arc of travel. Moreover, outer
What is claimed is:
faces 20F also of the upright legs conform to the relay
casings inside periphery to enable the upright legs to be
a maximum distance away from the axis of rotation thus
providing a maximum torque upon the armature for a
given amount of magnetic pull.
1. In an electrical relay the combination comprising;
a cylindrical shell closed at one end, a header ldisc form
ing a closure for the other end of said shell; a magnetic
core transversely disposed within said shell, a coil assem
bly mounted on said core, means for sealing said coil
Permanent magnet assemblies r58 and 59, each con
assembly pole pieces of magnetic material attached to
sisting of a mounting bracket 21 and 22 and a permanent
the ends of said core and extending transverse to the
magnet element 23 and 24, serve to counteract rebound 20 axis thereof, a window frame type armature surrounding
vtendencies incurred from inherently bias contact springs
-27 moving armature 20 against permanent magnet ele
said coil mounted `for rotation about the axis of said shell
ments 23 and 24 with considerable velocity and impact.
cross legs extending normal to said axis, said cross legs
and having side legs extending parallel to said axis and
This impact is :dissipated throughout the shell structure
and said pole pieces having faces which magnetically
by virtue of the permanent magnet elements’ mounting 25 cooperate upon energizing of said coil, permanent mag
brackets 21 and 22 extending and conforming to the in
ner surface of the relay casing.
Secured to face 20E of one of the cross-legs is a circu
nets acting -upon one of said cross-legs to aid in restor
ing said armature to normal position upon deenergizing
of said coil, said magnets are mounted to two mounting
lar actuator plate 25 holding the six individually adjust
bases attached to the closed end of said shell, said mount~
able radially arranged glass beaded pins 26'. These pins 30 ing bases conforming to the inner cylindrical surface of
are located at the periphery of actuator plate 25 or a
said shell, a plurality of spring biased contact springs
maximum distance away from the axis of rotation, and
generally radially extending from said axis and mounted
therefore the pins move in an arc a suflicient amount to
to terminal posts disposed within said header disc, and
means operated by said armature for actuating said
a minimum amount.
35 contact springs against their bias.
Adjustment of the glass beaded pins 26 with the con
2. In an electrical relay the combination comprising;
tact springs 27 is made by individually adjusting pins
a cylindrical shell closed at one end, a header disc form
actuate spring contacts 27, although armature 20 rotates
26 with a long nose plier or a similar tool. This adjust
ment is made as opposed to the more difficult and skill
ing a closure for the other end of said shell, a magnetic
core transversely disposed Within said shell, a coil as
40 sembly mounted on said core, means for sealing said coil
ful adjustment of the contact springs 27.
The described elements operate upon energizing and
assembly pole pieces of magnetic material attached to the
deenergizing of coil 50 Within casing 10, therefore the
ends of said core and extending transverse to the axis
relay is responsive to electrical power furnished at termi
thereof, a window frame type armature surrounding said
nal post 54. Upon energizing coil 50 a magnetic ñeld
coil mounted for rotation about the axis of said shell and
is set up through the magnetic structure of the relay con 45 having side legs extending parallel to said axis and upper
sisting primarily of core 11, pole pieces 12 and 13, and
and lower cross legs extending transversely to said axis,
armature 20. This field attracts the Irotatable amature
said armature legs and said pole pieces having faces mag
20 at faces 20A and 20B to faces 12A and 13A of pole
netically cooperating upon energizing of said coil, per
pieces 12 and 13l respectively. These faces in their re
manent magnets cooperating with said lower cross-leg of
stored position are separated by a minimum air gap, -thus 50 said armature upon tdeenergizing of said coil, an actuator
the magnetic ñeld is required to overcome a minimum
plate carried on the upper cross-leg of said armature
reluctance set up by the air gap. To facilitate this opera
having glass beaded actuator pins extending therefrom, a
tion the faces as a result of their configuration, remain
plurality of contact springs generally radially extending
substantially parallel in the restored position as Well as .
from said axis, mounted to terminal posts disposed with
in the energized position, although the armature moves 55 in said Iheader disc, and said contact springs haivng a
in an arc as opposed to a straight line. The effect of this
central linger portion actuated by said actuator pins.
magnetic cooperation is that a minimum amount of power
is required to close the air gap between the faces based
on the fact that the smaller is the distance between the
faces the greater is the attracting force.
in claim l wherein said central ñnger portion is ilanked
by two contact portions of equal length, each of said
Furthermore, upon energizing the coil, glass beaded
3. In an electrical relay the combination as set forth
contact portions having »a 'contact element on front and
pins 26 of actuator plate 25 engage with the extended
back side, and -front and back contacts mounted to ter
minal posts also ‘disposed within said header disc which
central linger portions 33 moving thereby the contact
cooperate with said contact elements respectively.
portions 34 and 35 from one stationary contact to an
4. In .an electrical relay the combination comprising: a
other stationary contact or from the restored position to 65 cylindrical shell yclosed at one end; a header disc forming
the energized position. Thusly, is the break-make con
a Iclosure -for the other end of said shell; a magnetic core
tact operation of the relay completed. To insure that
transversely disposed within said shell; a sealed casing
the contact elements 36 make with the stationary contact
having an inner sleeve extending therethrough which re
elements '37 and 38 the glass beaded pins 26 do not reach
ceives said magnetic core; a `coil assembly positioned With
the end of their travel until after contact elements 36 are 70 in said sealed casing and hermetically sealed thereby; a
in contact with the stationary contacts 37 and 38. In
pair of lpole pieces made of magnetic material each at~
addition, to insure contact the contact springs 27 as Well
tached to an end of said core adjacent said sealed casing
as corresponding stationary contacts 37 and 38 are of
and having a first face; an armature mounted for rotation
the twin contact type. This, for instance, insures con
about the axis of said shell and having a second face
tact even though one contact may be contaminated. v
75 positioned so as to be in a cooperating relationship to said
3,092,700
5
ñrst face; a plurality of contact springs generally radially
extending from the axis towards the circumference of said
shell and mounted through terminal posts disposed within
said header disc; and means operated by said armature for
actuating said contact springs.
5. In an electrical relay the combination comprising: a
cylindrical shell closed at one end; a header disc forming
a closure for the other end of said shell; a magnetic core
transversely disposed within said shell; a sealed casing
having an outer sleeve an inner receiving said magnetic
core and two end pieces forming a closure to said sleeves;
a coil assembly positioned Within said sealed casing and
hermetically sealed thereby; a pair of pole pieces made
of magnetic material each attached to an end of said core
transversely `to the axis of said core and adjacent said end 15
pieces; a window frame type armature receiving said
sealed casing and mounted for rotation about the axis of
said shell, said armature having two side legs extending
parallel to said axis and an upper and lower cross leg
which extend through said axis in a plane normal thereto, 20
said side legs and said pole pieces having magnetically
cooperating faces, said cooperating faces lie in two planes
6
substantially parallel to each other and equal distance
from the :axis of said shell; a plurality of contact springs
gener-ally radially extending from the axis towards the
`circumference of said shell and `mounted to terminal posts
disposed Within said header disc, and Ámeans openated by
said armature for 4actuating said contact springs.
6. In an electrical relay the combination as set forth in
claim 5 wherein the outer yfaces of said side legs conform
to the inner cylindrical surface of said shell.
References Cited in the ñle of this patent
’
UNITED STATES PATENTS
2,805,301
Shaw ________________ __ Sept. 3, 1957
2,854,545
Nemetll ______________ __ Sept. 30, 195‘8
2,923,794
2,927,177
2,951,134
2,952,755
2,960,583
2,976,379
3,005,071
3,042,773
Keeran ______________ __ Feb. 2, 1960
Nemeth ______________ __ Mal'. l, 1960
Lazich _______________ _.. Aug. 30,
Brinker et al __________ __ Sept. 13,
Fisher _______________ __ NOV. 15,
Rhodes ______________ __ Mer. 21,
Brunicardi ____________ __ Oct. 17,
Keller et al. __________ __ July 3,
1960
19‘60
1960
1961
1961
1962
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