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Патент USA US2258123

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J. F. MERKEL'
RELAY
2,258,123
'
Original Filed Jan. 28, 19559
I
mwm.I/w
mr
INVENTOR
Mum
ATTORNEY
Patented Oct. 7, 1941
2,258,123
UNITED STATES PATENT OFFICE‘
RELAY
Joseph F. Merkel, Rochester, N. Y., assignor to
General Railway Signal Company, Rochester,
N. Y.
Original application January 28, 1939, Serial No.
253,383. Divided and this application June 14,
1840, Serial No. 340,551
3 Claims. (01. 175_345>
This invention relates, in general, to improve
ments in relays, and has more particular refer
ence to improvements in the so-called “Type-B”
The armature carries an operating member 23,
which is received in a slot 24, in a contact op
erator 25, for moving the contact operator, and
with it the usual movable contact ?ngers.
Referring now more particularly to Figs. 2 and
nection with railway operation.
The present application is a division of my ap
3, there is here shown the improved means for
adjusting spring 2|, which, as can be seen from
plication, Ser. No. 253,383, filed January 28, 1939,
Fig. 1, biases the armature M to its deenergized,
for Relays, now Patent No. 2,258,122, granted
or released, position. This spring 2| is sleeved
October '7, 1941.
One object of the present invention is to pro 10 on the rod 22 which, atits upper end, is threaded
as at 221, and is slotted longitudinally as at 82,
vide an improved adjusting means :for varying
from its outer end to a considerable distance in
the resilient bias on the relay armature.
wardly. This slot 82 receives a follower F, which
Further objects, purposes and characteristic
is a flat plate-like member having a lower portion
features of this invention will appear as the de
83 of a width to be received within the spring 2|,
scription progresses, reference being made to the
with diametrically opposed extending arms 84,
accompanying drawing showing, solely by way of
which extend beyond the spring 2| and bear
example, and in no manner whatsoever in a limit
against the upper end thereof. The follower F is
ing sense, one form which the invention can as
completed by an upper portion 85, which is of a
sume.
size to be received in the threaded central bore 86,
In the drawing:
in adjusting nut N, the bore 86 being threadable
Fig. 1 is a side sectional elevation, with parts
onto the end 221 of the rod. Nut N has an outer
shown in elevation of a portion of a relay embody
knurled portion 81 and a reduced inner portion 88,
ing the present invention.
of a size to be received within the spring 2|, the
Fig. 2 is a perspective, exploded, view, of the
nut being slotted by two transverse slots 89 and
armature biasing means.
90 positioned preferably at 90° from each other so
Fig. 3 is an exploded view of the armature bias
as to receive the arms 84, of follower F, in either
ing means.
of two positions.
The relay essentially comprises an insulating
With the arrangement as described just above,
base member 4, a housing 5, which is preferably
when it is desired to vary the tension of the
made of transparent material such as any usual
spring 2| , as, for example, to increase it, it is
or desired thermal plastic substance, which ?ts
necessary merely to push the follower F in its
into an annular groove 41 in the base 4. The
slot in the threaded stem, to compress the spring,
housing 5, and the base 4, are held together, and
and then to turn nut N on the threaded stem
are held onto a support by means of long through
to the proper position and permit the follower
bolts 6 which are clamped to the support and
F to be urged by the spring 2| toward the nut
carry on their outer ends, holding nuts 8.
to cause the arms 84 to enter one of the slots
Carried by ‘base member 4, by means of screws
89 or 90. In this manner, all parts are locked in
9, are two cores l0, magnetically interconnected
adjusted position and the adjustment cannot be
by a back strap II, and each carrying a winding
l 2 held in place by a leaf spring l8. At the outer 40 accidentally changed. This follows, since the
threaded stem 22 is in ?xed position, the follower
end of each core I0, is a pole shoe l3, which co
is locked to the stem by the slot in the stem and
operates in the usual manner with an armature
the nut is locked to the stem by the follower.
I4, carrying a residual pin l5, and ‘pivoted at IE,
It is obvious, of course, in' order to decrease the
to a ?xed member H. The ?xed member I1 is
tension of the spring, that the nut can be eased
held between the pole shoes l3, by means of
off, and the same general procedure followed.
screws or the like I9.
It should be noted that the locking of all of
The pivoted armature l4, carries an adjustable
the parts has been accomplished without the
stop screw 20, for determining its retracted posi
need for a wrench, or other tool, for producing
tion, and this armature is biased to its retracted,
or deenergized, position, by means of a spring 2|, 50 high degrees of friction between parts, and also
so that a subsequent adjustment can be made by
carried on a threaded rod 22, which, at its lower
hand without the use of any special tools, as a
end, is screwed into the fixed member IT. The
wrench.
means for adjusting the tension of spring 2 | , con
stitutes one of the features of the present in
Thus, a securely locked adjusting means for a
55 biasing spring for the armature has been pro
vention, and will be described in detail, below.
line of relays, for use more ‘particularly in con
52,258,123
2
vided, which has no binding parts, and which,
position, a coil spring sleeved on the stem and
for its manipulation, requires no special tools
or equipment, other than the hand.
adapted to bear at one of its ends on the armae
ture, a longitudinal slot in the free end of the
‘ The above rather speci?c description of one
stem and extending inwardly thereof a consider=
able distance, a follower freely slidable in the slot,
form of the present invention, has been given
solely by way of example, and is not intended, in
any manner whatsoever, in a limiting sense.
It
should be understood that this application is in
tended to cover all such modi?cations, adaptay
tions and variations as may prove desirable or
expedient, except insofar as they are speci?cally
excluded by a reasonable interpretation of the
appended claims.
I
arms on the follower extending outwardly to each
side well beyond the spring and bearing against
the other end of the spring, a nut threaded on
the end of the stem, the follower arms extend
ing to each side well beyond the edges of the
nut, a transverse slot in the nut for receiving
the follower arms whereby to lock the nut to
the stem, and a central boss extending inwardly
of the nut and receivable within the spring, the
Having described my invention, I now claim:
1. In a relay, an adjustable biasing means for 15 follower, below the arms, being snugly receivable
in the spring.
an armature comprising, a threaded stem ?xed
in position, a coil spring sleeved on the stem and
3. In a relay, an adjustable biasing means for
adapted to bear at one of its ends on the arma
an armature, comprising, a threaded stem ?xed
ture, a longitudinal slot in the free end of the
in position, a coil spring sleeved on the stem and
stem and extending inwardly a considerable dis
adapted _to bear at one of its ends against the
tance thereof, a follower freely slidable in the
armature, a longitudinal slot in the free end of
slot, arms on the follower extending outwardly
the stem and extending inwardly a considerable
to each side well beyond the spring and bearing
distance, a follower slidable in the slot and bear
against the other end of the spring, a nut
threaded on the end of the stem, the follower
arms extending to each side well beyond the edge
of the nut, and a transverse slot in the nut for
receiving the follower arms whereby to lock the
nut to the stem.
2. In a relay, an adjustable biasing means for
the armature comprising a threaded stem ?xed in
ing against the other’ end of the spring, a slotted
nut threaded on the stem beyond the follower,
the follower having a portion to ?t into the slot
in the nut, and having portions extending be
yond the spring and the nut on each side, where
by a quick action lockable spring tension adjust
ing means is produced.
JOSEPH F. MERKEL.
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