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Патент USA US2129855

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Sept. 13, 1938.
2,129,855
o. T. MGILVAINE
RELAY
Filed Oc?. 28, 1955
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Patented Sept. 13, 1938
' 2,129,855
UNITED STATES PATENT oFFicrS
2.129355
RELAY
Oran T. Mcllvaine, St. Charles, 111., assignor to
Mcllvaine Patent Corporation, St. Charles, 111.,
' > a corporation of Delaware
‘
Application 0mm 28,- 1935, Serial No.- 41,043
4 Claims. ‘ (Cl. 200-111)
My invention relates ‘to relays and includes‘
among its objects and advantages 8. high degree
of ruggedness and resistance to injury by me
chanical shock, and a minimum requirement of
5 actuating energy in proportion, to the energy‘
- characteristics of the controlled circuit.
~ In the accompanying drawing:
_
Figure 1 is a vertical section of a device ac
cording to the invention; and
'
Figure 2 isan enlarged section on line 2—2 of
10
Figure 1.
‘
-
In the embodiment of the invention selected
for illustration the movable parts are housed in
a glass shell comprising a cylindrical tube l0
v15 necked in as at l2 to form an inner supporting
shoulder and then ?ared outwardly as at l4 to
form an outward supporting shoulder. This
much of the shell is de?ned by surfaces of revo
lution except for the sealing tip 15 at the top.
Below the ?ange H the walls are brought in to
20
de?ne a flat bridge chamber "5 and two substan
. tially cylindrical wells i8 and 20 separated by
the spacing arch 22.
'
Lead wires 24 and 26 are sealed into the bot
25 toms of the~we11s 20 and I8 and immersed in the
mercury ?lling 28. The circuit closing element
is in the form of a bridge having a bight 30 at
- the top and spaced downwardly extending legs
32 and 34. In small units the entire bridge is of
30 tungsten, but it will be obvious that in larger
The lower end of the spring 48 is supported by
the abutment I2. I prefer to provide an annular
washer 5i shaped to lie against the abutment
l2 and of su?lcient vertical dimensions to avoid
danger of tipping, which washer a?ords a ?at -
seat for the lower end of the spring 48.
The solenoid 52 rests on the ?ange l4, and its
upper end is adjacent the lower end of the mag
netic portion 36 of the plunger. Depending on
the operating characteristics desired, 1 may make 10
the stud 44 of magnetic or o! non-magnetic ma
terial, and I may make the washer ii of mag
netic material such as iron, or of ceramic or
other non-magnetic material.
_
The lead wires 54 and 56 for the controlling 15
circuit have been illustrated as covered with in
sulation at 58. These lead wires pass out through
the top cover lillof the cylindrical sheet metal
casing 62, being guided through suitable aper
tures by means of the insulating bushings 64. 20
Similarly, the lead wires 24 and 26 pass out
through the bottom cover 66. These lead wires
have been illustrated as being of the'same out
side diameter as the diameter of the insulation
constructions most of, the bridge could be made
58. Accordingly, they ,are guided out by insulat 25
ing bushings 64 identical with those at the top.
The space between the glass shell and the
sheet metal casing 62 may be occupied by gas,
liquid, or solid, but for ordinary commercial uses
excellent mechanical protection as well as insu 30
lating properties may be secured by» pouring in a
of cheaper conducting material with tungsten
?lling of molten tarry insulating material which
tips at the bottoms of the legs. The bridge is
completely ?lls the casing 62 and congeals in‘
supported and actuated by a plunger built up of . placmso as to a?ord both a mechanical support
for holding the shell andlsolenoid in place and 35
a material mechanical cushioning action against’
blows received by the shell 62. It will be noted
that by varying the characteristics 01 the spring
tion 36 by slipping it. over a tip 40 of reduced~ 48 different time characteristics canbe given to
40 diameter, after which the metal of the tube 38 the movement of the bridge. When the bridge 40
an upper portion 35 oi’. magnetic material such
as iron, and a lower portion 38 of non-magnetic
material such as brass._ - I have illustrated the
portion 38 as tubular and united with the por
45
may be spun into the groove 42 at the base oi
moves up, two vertical arcs are drawn from the.
the tip 40. The all tungsten bridge illustrated is
mercury 28, and the‘ magnetic ?eld of vthe cur
welded to a shank '44 provided with a similar tip
rent tends to move these arcs away from each
46 entering the bottom of the tube 38.~
The plunger and tube are normally supported
in the position illustrated by a compression
spring 48. Near the upper end of the magnetic
portion 36 Iiorm an annular groove Ill and the
other and ‘thus assist in their extinguishment.
upper end turns of the spring 48 are of gently
ance to the ?ow of current in an are within the
50 decreasing diameter down to a diameter slightly
vsmaller than that of the groove 50. Thus the
plunger can be thrust inside the spring and the
end turn will be resiliently expanded‘ to slide
down over the plunger portion 36 until it comes
55 to the groove 5|] and snaps into place.
When the ?lling 2B is of mercury, I prefer to ?ll -45
the shell before sealing, with hydrogen. The use
of a hydrogen ?lling material in excess of at
mospheric pressure greatly increases the resist
shell.
'
‘
50
Devices according to the ‘invention may be de
signed ior an‘ extremely-wide range of current
varying capacities. At all capacities I ?nd it
possible to employ an unusually small amount of
energy in the solenoid 52 compared with the en 65
2
2,129,855
ergy characteristics of the controlled circuit. It
will be obvious that the embodiment disclosed is
primarily suitable for controlled circuits that are
open most of the time. ‘ However, for controlling
circuits that are normally closed, it will be obvi
pus that the plunger portions 36 and 38 could be
interchanged and the solenoid 52 moved up to
shell comprising a tubular portion telescoped in
said solenoid arid housing said plunger ' and
spring, a spring abutment shoulder near the bot
tom of said tubular portion, an outwardly ex
tending ?ange underlying saidsolenold, a bridged
chamber below said ?ange, and spaced wells at
the bottom of said chamber for receiving said
the top of the sleeve ill, with the spring 48 en- ' legs; said chamber being ?attened to guide said
tirely omitted and the bridge normally resting legs into said wells; lead conductors for the con
10 with its legs in the wells.
trolled circuit entering the bottoms of said wells;
Without further elaboration the foregoing will lead conductors for the controlling circuit ex
so fully explain my invention that others may, by tending out from said solenoid; a ?lling of mer
applying knowledge current at the time of ap
cury in said wells; and a ?lling of hydrogen oc
plication, readily adapt the same for use under cupying the rest of the space inside said shell.
various conditions oi!‘ service.
3. In a relay, in combination: a vertical bridge
I claim:
having its bight uppermost and its legs project
1. In a relay, in combination: a vertical bridge _ ing downward; an actuating plunger extending
having its bight uppermost and its legs projecting
20
downward; an actuating plunger extending ver
vertically upward from said bridge and integrally
united therewith; a helical compression spring
tically upward from said bridge and integrally
united therewith; a helical compression spring
encircling said plunger and normally holding
said plunger and bridge elevated and the relay
encircling said plunger and normally holding said _ open; said plunger being built up of an upper
plunger and bridge elevated and the relay open;
portion of magnetic material and a lower por—
said plunger being built up of an upper portion tion of non~magnetic material; an annular sole
' of magnetic material and a lower portion of non
magnetic material; an annular solenoid winding
adjacent said non-magnetic plunger portion for
attracting the magnetic plunger portion to move
into the position normally’ occupied by the non
30 magnetic plunger portion and close said relay;
a hermetically sealed non-conducting enclosing
shell comprising a tubular portion telescoped in
said solenoid and housing .said, plunger and
spring, a spring abutment shoulder near the bot
no U! tom of said tubular portion, an outwardly ex
tending ?ange underlying said solenoid, a bridged
chamber below said ?ange, and spaced wells at
the bottom of said chamber for receiving said
legs; said chamber being ?attened to guide said
40 legs into said wells; lead conductors for the con
trolled circuit entering the bottoms of said wells;
lead conductors for the controlling circuit ex
tending up from said solenoid; a sheet metal
casing enclosing said shell and spaced therefrom
45 throughout; insulating bushings for said leads
in the top and bottom of said casing; a filling of
mercury in said wells; a ?lling of hydrogen at
more than atmospheric pressurev occupying the
rest of the'space inside said shell; and a filling
of solid insulating material congealed inside said
casing‘ and a?ording mechanical support and
protection to said shell; said shell being shaped
throughout so that the mercury ?lling for the
wells can drain back into the wells from any por
55 tion of the shell.
2. In a relay, in combination: a vertical bridge
having its bight uppermost and its legs project
noid winding adjacent said non-magnetic plung~ - ,
er portion, for attracting the magnetic plunger
portion to move into the position normally oc
cupied by the non-magnetic plunger portion and
close said relay; a hermetically sealed non-com
ducting enclosing shell comprising a tubular
portion telescoped in said solenoid and housing
said plunger and spring, a spring abutment shoul
der near the bottom of said tubular portion. an
outwardly extending ?ange underlying said sole
noid, a bridged chamber below said ?ange, and ;
spaced wells at the bottom of said chamber [or
receiving said legs; said chamber being flattened
to guide said legs into said wells; lead conductors
for the controlled circuit entering the bottoms
of said wells; lead conductors for the controlling 40
circuit extending out from. said solenoid; and a
?lling of conducting liquid in said wells.
4. In a relay, in combination: a vertical bridge
having its bight uppermost and its legs project
ing downward; an actuating plunger extending
vertically upward from said bridge and integral
ly united therewith; a helical compression spring
encircling said plunger and normally holding
said plunger and bridge elevated and the relay
open; said plunger being built up of an upper
portion of magnetic material and a lower por
tion of non-magnetic material; an annular sole~
noid winding adjacent said non-magnetic plunger
portion for attracting the magnetic plunger por
tion to move into the position normally occu
pied by the non-magnetic_plunger portion and
close said relay; a hermetically sealed non-con
ing downward; an actuating plunger extending ‘ ducting enclosing shell comprising a tubular por
vertically upward from said bridge and integral
60 ly united therewith; a helical compression spring
encircling said plunger and normally holding said
plunger and bridge elevated and the relay open;
said plunger being built up of an upper portion
- of magnetic material and a lower portion of non
65 magnetic material; an annular solenoid winding
adjacent said‘non-magnetic plunger portion, for
attracting the magnetic plunger portion to move
into the position normally occupied by the non
magnetic plunger portion and close said relay;
70 a hermetically sealed non-conducting enclosing
tion telescoped in said solenoid and housing said
plunger and spring, a spring abutment shoulder 00
near the bottom of said tubular portion, an out
wardly extending ?ange underlying said solenoid,
a bridged chamber below said ?ange, and spaced
wells at the bottom of said chamber for receiv
ing said legs; said chamber being ?attened to
guide said legs into said wells; and contacts in
said wells to engage said legs when said bridge
is lowered by said solenoid.
ORAN T. MCILVAINE.
v
w
‘
CERTIFICATE
Patent No. 2,129,855,,
'
OF
CORRECTIONO -
‘
A
September 15, 1958.
‘
ORAN
11;
McILVAINT'
'
'
_
It is hereby certifie? that error appears in the printed spec?ication
of the above vmnnberecipatént requiring correction as follows: Page 1 , second
column, line 55, for the word “varying” rea€ carrying; ahd that the said
Letters Patent shouldbe read/with this‘ corrqction‘the'rein that the‘samé
may conform to the record of the cage. in. the Pateht O?fltéo
Signed: and sealed this 15th day of‘ November, A. D.’ 19138»
Henry Vart Arsdala
(Sqal)
-
'
I
'
Actjng Commissioner of Patents.
_
.
CERTIFICATE OF CORREC'I‘IOIIIo -
Patent ‘No. 2,129,855;
'
‘
September 15, 1938.
‘ ‘ORAN
1';
McILvAIm
_
It is hereby certified {that errorepp'ears in the printed spec'ificatiiion
of the above numbered patent requiring cornegtion es follows: Page 1 , second
column, line 55, for the word "varying" read-carrying‘; vand that the said
Letters Patent should be read‘with this‘ cori'ectionthe’rein that the'same;
may conform to the record of the cese. in the Patent Ofi‘io'e,
Signed: and‘ sealed this 15% day, of‘ November‘, A. b.1958,
Henry Van Arsdale
(Seal)
-
‘
'
‘
'
Acting Commissioner of Patents.’
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