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Патент USA US2132992

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Oct- 11, 1938.
B. MISHELEVICH HAL
2,132,992
HOLDING MEANS FOR INSTRUMENTS
‘ Filed Jan. 8, 1937
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Insulazfior?
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INVENTORS
Berg/0min
lJ/releuic/z
BY an
nkola z'c/I
THEIR ATTORNEY
Patented Oct. 11, 1938
2,132,992
UNITED STATES PATENT OFFICE
2,132,992
HOLDING MEANS FOR INSTRUMENTS
Benjamin Mishelevich, Pittsburgh, and Branko
Lazich, Penn Township, Allegheny County, Pa.,
assignors to The Union Switch & Signal Com
pany, Swissvale, Pa., a corporation of Penn
sylvania
Application January 8, 1937, Serial No. 119,656
4 Claims. (Cl. 200—104)
Our invention relates to holding means for in
shaft is biased by means of the pendulum. The
struments, and particularly to holding means counterweight 5t is arranged to be locked in an
whereby the movable member of an instrument adjusted position by means of lock nuts 5' one of
such as an electrical relay may be effectively which is screwed onto the post 5° on each side
5 locked against movement during shipment or
of the counterweight.
handling of the relay to prevent damage which
The previously referred to motor. device M for
might otherwise result from such handling or oscillating the rockshaft 4 comprises van arma
shipment.
More particularly our present invention re
lates to holding means for locking against move
ment the oscillating member of a relay of the
type known as a ?asher relay in which the rate
of oscillation of the oscillating member when the
relay is operating is controlled by a compound
15 pendulum having considerable mass.
We will describe one form of relay having ap
plied thereto one form of holding means embody
ing our invention, and will then point out the
novel features thereof in claims.
20
In the accompanying drawing, Fig. l is a view
partly in side elevation and partly in section
showing one form of relay having applied thereto
one form of holding means embodying our inven
tion. Fig, 2 is a view partly in end elevation and
25 partly in section of the relay shown in Fig. 1.
Similar reference characters refer to similar
parts in both views.
Referring to the drawing, the reference char
acter A designates an insulating top plate, which
30 top plate supports allof the operating mechanism
of the relay. Suspended from the top plate A
by means of hangers I is a cast rectangular frame
2, and journaled at its ends in suitable bearings
3 mounted in the frame 2 is a rockshaft 5. This
35 rockshaft is, biased to one position by a com
pound pendulum P, and is arranged to be oscil
lated at a predetermined frequency which de
pends upon the proportioning and adjustment of
the parts by means of a suitable motor device M~
40 which we will describe presently.
The compound pendulum P may have any suit
able form but in the form here shown, this pen
dulum comprises a cast U-shaped bracket 5 the
upwardly extending arms 5' of which are pinned
45 to the rockshaft 4 intermediate their ends, and
are provided at their upper ends with enlarged
' portions 5') to provide the desired mass. A de
pending threaded post 5° is secured at its upper
end within a boss 5'1 formed on the under side of
50 the yoke 5e of the bracket 5, and this post car
rles a counterweight 5t which is mounted eccen
trically to the post 5°, and which serves both as
a means for regulating the period-of oscillation of
the rockshaft within certain limits and also as a
55 means for varying the position to which the rock
ture 6 which is pinned to the rockshaft l at one
side of the bracket 5, and an electromagnet which
cooperates with the armature 6. This electro
magnet may have any preferred construction,
but in the form here shown, this electromagnet
comprises a winding ‘I mounted on a backstrap
8 secured to the short arms 9“ of L-shaped pole
pieces 9, the long arms 9b of which extend up 15
wardly past the opposite sides of the armature
6 and are secured to depending lugs 2a formed
on the frame 2. The angular disposition of the
armature 6 with respect to the rockshai’t 4 is
such that, when the rockshaft occupies the posi 20
tion to which it is biased by the pendulum P, the
longer axis of the armature will be inclined ver
tically at an acute angle with the magnetic field
which is set up between the pole pieces »9 when
the winding 1 is energized.
The relay also comprises a plurality of contacts
I0 of the well-known mercury type comprising a
pair of electrodes disposed in an evacuated glass
bulb containing a quantity of mercury which
?ows into or out of engagement with the elec 30
trodes to make or break a circuit passing through
the electrodes. These contacts of which only
four are visible in the drawing are mounted in
clips il secured to the yoke 5° of the bracket 5,
in such manner that oscillation of the rockshaft 35
through its intended amplitude will cause these
contacts to become alternately opened and
closed. To facilitate making electrical connec
tion with the contacts, the electrodes of the con
tacts are connected by means of ?exible con 40
nectors I2 to terminal posts i3 mounted on the
top ‘plate A, the connections being held in the
proper spaced relation adjacent their lower ends
by insulating members l4, l5, and I6 in the man
ner shown.
Two of the contacts l0 which are disposed on
45
opposite sides of the rockshaft 4 constitute the
operating contacts of the relay, and these con
tacts are so arranged that, if they are connected
in series with the winding ‘I in a control circuit
for the relay, the electromagnet will become al
ternately energized and deenergized in a manner
to cause the rockshaft to oscillate at a constant
predetermined frequency which depends upon the
adjustment of the counterweight 5’.
55
2,132,992
Two metal stops [1 are secured to the opposite
Sides of the frame 2 directly opposite the one
arm 5a of the bracket 5, and these stops cooper
ate with the enlarged portion 5b of the arm to
limit the extreme positions to which the rock
post 5° is within the cup in the locking member,
all of the oscillating parts of the relay will then
be securely held in the positions which they then
occupy, so that damage to these parts caused
by handling of the relay will be effectively'pre
shaft 4 is free to rotate.
vented.
.
>
I
The operating ‘mechanism of the relay is all
'
One advantage of holding means embodying
our'invention is that it provides a simple and
enclosed within‘ a suitable casing 20 which in
the form here shown is a box-like- metal casting, effective method for protecting the relay during
l0
10 three of the sides of which are provided with glass ‘ shipment.
windows 2! through which the operating mecha
nism may be viewed. The casing is held in posi
tion against the under side of the top plate A by
Another advantage of holding means embody
ing our invention is that, when the relay is placed
in service, the locking member remains attached
means of screws 23 which pass through clearance
to the relay where it is always available for use
holes provided in the bottom of the casing, ‘and
are screwed into tapped holes provided in the
lower ends of depending legs 24, the upper ends
whenever the relay is to be transported.
‘A further advantage of holding means embody
of which are secured to? the under side of the
‘I ber remains in the, hole 26 in the case when the
15
ing our invention‘is that, since the locking mem
relay is in service, it is impossible for dirt to enter
2.
'
1
The ?asher relay thus far described is disclosed ‘ the relay through the hole which is provided for 20
frame
20
' and claimed in the copending application for
Letters ‘Patent of the United States, Serial No.
182,506, ?led by Arthur W. Fisher and Benjamin
Mishelevich, on December 30, 1937.
As will be apparent from the foregoing de
.25
scription', the various parts of the relay which
are mounted on the rockshaft 4 possess consider
able mass, and unless some means are provided
for preventing the rockshaft from swinging dur
2-30 inghandling of the relay, damage is likely to
result to the bearings which support the rock
shaft, to the mercury contacts ID, or to the other
parts of the relay. The means here shown for
the. locking means. .
. ' Although we have herein shown and described
only one form of holding means embodying our
invention, it is understood that various changes
and modi?cations may be made therein within 25
the scope of the appended claims without de
parting from the spirit and scope of our inven
tion.
Having thus described our invention, what we
claim is:
V
1. In combination, an instrument having a
‘?xed part provided with a screw threaded hole
and a movable part provided with a. projecting
post, a screw threaded member screwed through
the hole in the ?xed part and provided with a
cup which is adapted to receive one end of said
?ange 25a'and with an axially disposed opening post when said member is screwed to one posi
25“ which forms a cup, and the lower end of . tion to lock the movable part in a ?xed position,
- preventing movement of the rockshaft comprises
'35‘ an externally screw threaded locking member
' ‘25 the upper end of which is provided with a
‘which is. provided with a saw kerf 25° for the
reception of a screw driver to facilitate rotation
of the member 25. The member 25 is screwed
through a tapped hole 26 formed in the base of
the casing 2|, in such a position that the axis of
the opening 25* will align with the axis of the
45 post 56 when the rockshaft ll occupies the posi
tion to whichit is biased by the pendulum P, and
and a lock nut screwed onto said screw threaded
member to lock said member-against rotation. 40
2. In combination, an instrument having a
?xed part provided with a screw threaded hole
and a movable part provided with a projecting
post, a locking member screwed through the hole
in the ?xed part and provided in one end with a 145
‘cup and in the other end with a saw kerf for
mounted on the locking member on the under
rotating said member, said locking member be
iside'of the base of the casing 2! is a jam nut 27
by means of which the member 25 may be locked
ing rotatable between a locking position in
which the cup receives one end of said post and‘
an unlocking position in- which said member is
out of the path of movement of said post, and a
lock nut on said locking member for securing
said member in a ?xed position relative to said
'50 ‘in the position to which it is rotated. To prevent
removal of the nut 26 after the locking member
7 ‘25' is assembled within the hole 26, the-threads
at the~lower end of the member 26 will usually
be jammed.
‘55 g The operation of the holding means embodying
our invention is as follows: When it is desired
?xed part. 1
3. The combination with a. relay comprising a"
an oscillatable shaft, a pendulum secured to said
‘shaft for timing said shaft and having a project
‘25 is screwed downwardly to the position in ' ing post carrying a counterweight for varying
‘which the ?ange 25a engages the base of the the period of said pendulum, motor means'for
oscillating said shaft, and contacts controlled by £60
60 ‘casing 2|, in which position it is shown in the
drawing, and the jam nut 21 is then tightened the oscillation of said shaft all enclosed in a
to secure the locking member in this position, casing, of means for preventing movement of
the parts being so proportioned that, when the ‘said shaft during shipment comprising a locking
locking member occupies this position, it will not .member screwed through "a threaded hole formed
interfere with the normal operation of the relay. in said housing, said member being provided in 365
When, however, it is desired to move the relay its upper end with a cup for at times receiving
about, as inv shipment, the jam nut 27 is ?rst the free end of said post and being movable be
backed off until it engages the jammed threads tween a locking position in which said cup re
at the lower end of the locking member, and the ceives said post and an unlocking position in '
which said locking member is out of engagement
70 locking member is then screwed upwardly to the
-to- place the relay in service, the locking member
position in which the cup formed by the opening
with said post.
25b receives the lower end of the post 5°, where
upon the jam nut 21 is again tightened to hold
' 4. The combination with a relay comprising an
the locking member in the locking position which
75 it then occupies. vIt is obvious that, when the
7
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'oscillatable shaft, a'pendulum' secured to said
shaft for timingsaid shaft and having a project
ing post carrying a counterweight for varying 75
2,132,992
the period of said pendulum, motor means for
oscillating said shaft, contacts controlled by the
oscillation of said shaft all enclosed in a casing,
of means for preventing movement of said shaft
during shipment comprising a. locking member
screwed through a threaded hole formed in said
housing, said member being provided in its upper
end with a cup for at times receiving the free
3
end of said post and being movable between a
locking position in which said cup receives said
post and an unlocking position in which said
locking member is out of engagement with said
post, and a jam nut screwed on said member for
securing said member against rotation.
BENJAMIN MISHELEVICH.
BRANKO LAZICH.
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