Improvements in Automatic Magnetic Oircuit Breakers.
Year: 1899

page_text: Date of Application, 4th July, 1899-Accepted, 3rd Feb., 1900
COMPLETE SPECIFICATION.
Improvements in Automatic Magnetic Oircuit Breakers.
I, CHARLES EDWIN STARR, of 117, Federal Street, Camden, New Jersey, United
States of America, Assistant Secretary, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:
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My invention relates to an improved construction of circuit breakers, wherein
the breaker is actuated to open suitable contact devices by an abnormally-excessive
flow of current through the line, said breaker being also actuated by the flow of
current through circuits other than the circuit opened by the circuit breaker
itself, means being thus provided for reducing the danger of causing an arc
between the ends of the circuit wire or contact device opened by said breaker.
Referring to the accompanying drawing:
Figure represents a side elevation, partly in section, of an automatic, magnetic
circuit breaker embodying my invention.
Figure 2 represents a side elevation of a modified construction thereof, and
Figure 3 represents, on an enlarged scale, a vertical section of a portion of
Figure 2, showing in dotted lines the different positions the parts may assume.
Like letters of reference indicate corresponding parts in the several figures.
A designates the circuit breaker, which consists of a bracket B having the
arms C and 1.
E designates a switch-carrying arm pivoted to the arm D at F, said switch-
carrying arm having an offset upper portion G, whose construction will be
understood from Figure 2, in which is located the solenoid coil or electro-
magnet H of copper or other material, which is in electrical connection with
the circuit, which actuates the electro-magnet and has the conductor leading
therethrough to a member of the contact device K, the latter consisting of thin
plates of the usual construction.
L designates the core of the magnet H, in which is located the armature M,
to which is attached the yoke N of iron or other material.
P designates a lock-nut of brass which has the adjustable screw bolt Q
passing therethrough, the head R of which is adapted to contact with the
extremity S of the lever T, said portion S being normally in such a position
that the head R rests thereon, with a clearance or free space between the lower
portion of the lever T and the adjacent face of the yoke N, thus permitting a
free and unimpeded initial movement of said yoke. The lever T is fulcrumed on
the pin U which is engaged by the recess V of the locking lever W, which is
mounted on the shaft X, the latter having its bearings in the arms C.
W designates a coil or other spring having one end attached to the lever W
and its other end secured to a suitable fixed point as an arm C, whereby the
lever W is always normally held in position as seen in full lines in Figure 3.
V designates a nose or extremity of the lever W which is adapted to be
engaged or lifted by the portion T, of the lever T when the latter is moved
upwardly as will be understood from Figure 1.

page_text: Referring now to Figures 2 and 3, Y designates an extremity of the lever T,
which is adapted to engage the recess Z of the trigger A', which latter is pivoted
at B to the lever C, which carries the weight or counter-balance D', said armı
being freely movable on the shaft X and said weight being located at one side
of the shaft X, said arm and weight thus forming a hammer. The trigger has
the lug E thereon, which is held normally between the stationary pin F¹ and
the extremity Y of the lever T, said trigger being held in its proper position
by means of said spring G.
Referring to Figures and 3 H designates allink having.'ond end pivoted at J'
to the lower portion K' of the switch-carrying arm E, while the other end of
said link is pivoted to the arm L', which is mounted on the shaft X.
M designates a roller mounted on the rod N' which is cushioned on the
spring Pl
10:
The operation is as follows:-
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C
1
The parts, normally appear as seen in Figure 1which is the preferred con-
struction, and upon any increase of the current above the normal, or on any
variation of the flow of current through, other, circuits than the circuit opened
by the circuit breaker itself, the proper connections having been made, the
armature will be drawn upwardly by the action of the magnet II, thereby
raising the yoke N and the end 'S of-the-lever T, it being noted that a free initial
movement of said yoke takes place before the latter strikes the end Sof' said
lever...
--
T.
.เล
..L.
By the above movement, the portion Twill-contact with the nose V³, thereby
disengaging the recess Vfrom the pin-U, whereupon the switch-carrying arm. E
being detached and the spring Ppressing upon the portion K through the
medium of the rod N and the roller M-swings to the right of the position seen
in the figures in the direction of the arrow ia-seen in Figures 1 and 3, whereupon
the contact is broken between the plates constituting the contact device-K.-In
the construction seen in Figures-2-and-3, the action of the magnet upon the
armature M is similar to that already-described and it will be seen that when, said
armature is raised the trigger A. will be depressed to the left of the position
seen in fullnes in Figure 3; whereupon the hammer or weight being un-
supported, falls upon the lever W, thereby lifting the opposite end out of engage-
ment with the pin U, whereupon the switch-carrying arm E being detached and
the spring P pressing on the portion through. the medium of the rod N
and roller M swings to the right and breaks the contact. as above explained.
Either the construction seen in Figure 1 or in Figures 2 and 3 may be employed
as may be desired. The link H¹ and lever L' serve, in the modification illustrated
in Figures 2 and 3 to limit the amount of rotation of the shaft X, by reason of
the connection which they afford with the arm E.
..
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st. In a circuit breaker, the combination of a switch-carrying arm, a solenoid
or magnet supported thereby, a locking lever for said arm, a lever actuated by
the armature of said magnet, a nose on said locking lever, adapted' to be engaged
by said armature actuated lever, whereby said switch-carrying arm falls when
the current actuates the electro-magnet.
I
2nd: In a circuit breaker, the combination of a switch-carrying arm, a solenoid
or magnet supported' thereby, a locking lever fulcrumed on a supporting arm, a
spring for holding said locking lever in position, a recess in said locking lever,
and a pin attached to said switch-carrying arm and engaged by said recess,, said
pin carrying a lever actuated by the armature of said magnet, and said latter lever
having a portion adapted to engage the nose of said locking lever...
-3rd: In a circuit breaker, the, combination of a hammer, a trigger carried
thereby, a locking lever, means for locking said trigger in position, and devices

page_text: for operating the locking, means and said trigger when the current actuates the
electro-magnet.
T
4th. In a circuit breaker, a hammer suitably supported and standing normally
at one side of its fulcrum, a trigger pivoted to said hammer, a spring common
to said hammer and to said trigger, whereby the latter is held in normal position,
a switch carrying arm, a solenoid or magnet supported thereby, a locking lever for
said arm, and a lever operated by the armature of said magnet, said lever
engaging said trigger.
5th. In a circuit breaker, a pivoted switch-carrying arm, a solenoid and
armature carried thereby, a yoke attached to said armature and operated by said
solenoid, a lever suitably fulcrumed and operated by said yoke, a hammer suitably
supported, a trigger attached to said hammer and having one end bearing on the
end of said lever, a locking lever for holding said switch-carrying arm in position,
and devices operated by said hammer for effecting the breaking of the circuit
when the current actuates the electro-magnet.
6th. In a circuit breaker, a pivoted switch-carrying arm a solenoid and
armature carried thereby, a yoke attached to said armature and operated by said
solenoid, a lever suitably fulcrumed and operated by said yoke, a hammer, a
fulcrum therefor, a trigger attached to said hummer and having a portion engaging
said lever, said hammer standing normally at one side of its fulcrum, so, that
when said lever is disconnected said hammer falls, a locking lever for holding
said switch-carrying arm in position, and means for enabling said hammer to
impact on sa locking lever when the current actuates the electro-magnet.
7th. In a circuit breaker, a pivoted switch-carrying arm, a lever pivoted therein,
a solenoid carried by said arm, connections common to the armature of said solenoid
and to said lever for operating the latter when the current actuates the electro-
magnet, a Jammer suitably supported, a trigger carried by said hammer and
having a portion thereof held between a pin or abutment and the end of the
lever operated by said solenoid, a spring for said trigger and a locking lever
adapted to be actuated by said hammer when the latter falls.
8th. In a circuit breaker, a pivoted switch-carrying arm E, an electro-magnet
and its armature supported by said arm, a lever T suitably fulcrumed, connections
common to said armature and to said lever, whereby the latter is operated when
the current actuates the electro-magnet, a hammer D supported upon its fulcrum
and at one side thereof, a trigger A¹ carried by said hammer, a spring G common
to said hammer and to said trigger, the latter having a projection of lug E,
which is held between the extremity of the lever T and the pin F¹, a locking
lever W suitably supported, a pin engaged by a recess in said locking lever, the
extremity of the latter being adapted to be depressed by the falling of said
hammer thereon when the current actuates the electro-magnet.
9th. In a circuit breaker, the combination of a hammer suitably supported,
a trigger carried by said hammer, a locking lever suitably supported and adapted
to be actuated by the impact of said hammer when said trigger is disengaged and
said hammer falls, said hammer normally standing at one side of its fulcrum,
means for locking said trigger in position, and devices for operating the locking
means and said trigger when the current actuates the electro-magnet.
1+
1 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.