Year: 1899

page_text: AUGUST ECKSTEIN, Electrical Engineer, Peel Works, Adelphi, Salford, Man-
chester, HERBERT JOHN COATES, Electrical Engineer, Peel Works, Adelphi, Salford
Manchester, do hereby declare the nature of this invention to be as follows:-
Our invention relates to an improved electrical indicator of that class known as
"electrical replacement" and is designed more particularly to operate a flag, sema-
phore arm, or other indicating device, in a positive manner.
In carrying our invention into practice, we employ a permanent magnet,
simple or compound, fitted with pole pieces (or having its poles suitably shaped)
to receive between them an armature, preferably either of the shuttle or the
drum type, & suitably wound with insulated wire in the usual manner, the said
armature being capable of partial rotation in the magnetic field between the poles
of the said magnet, the rotation may be limited in either direction by suitably
placed stops. Attached to the axle of the armature is the indicating device which
may be a flag, or a semaphore arm, or equivalent arrangement.
The ends of the windings are connected by means of the axle and insulated
pieces thereon to suitable brushes or springs, or by means of spiral springs or
Hexible leads joined to suitable terminals for connecting to the source of current.
Assuming that the normal position of the armature and indicating device is
to the left, and a current he sent through the armature in the proper direction,
the armature is caused to rotate and move the indicating device over to the right:
upon reversing the direction of the current, the armature rotates in the opposite
direction & restores the indicating device to the normal position.
Both positions are made positive by virtue of the attractive force exerted
between the magnet and the iron of the armature, or by the suitable disposition
of over balancing weights or springs, or by a combination thereof.
In some cases two separate windings can be employed for effecting the partial
rotation of the armature in one direction or the other. Instead of the permanent
magnet it is obvious that an electro magnet may be employed if desirable.
Dated the 20th day of November 1899.

page_text: Manchester, 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:-
Our invention relates to an improved electrical indicator of that class known
as electrical replacement, and is designed more particularly to operate a flag,
semaphore arm, or other indicating device in a positive manner.
The manner in which our invention is carried into practice we now describe
and with reference to the accompanying drawings in which Figs. 1 & 2 are front
elevations of an indicator according to our invention shewing a semaphore arm
in 2 positions, and Fig. 3 an elevation in section along line a b of Fig. 4 which
is a side elevation of the indicator. We employ a permanent single magnet or as
shewn in Fig. 4 a compound magnet c preferably fitted with pole pieces dd
or leaving its poles suitably shaped, between which, in the magnetic field, is the
armature e, pivotted so as to be capable of partial rotation, the rotation being
limited in either direction by the stop screws ff. The said armature is preferably
of the shuttle or of the drum type, and suitably wound with insulated wire in
the usual manner. Attached to the axle of the armature e is the indicating device
or semaphore arm g.
The ends of the armature windings are connected by means of the axle and
insulated pieces thereon to suitable brushes or springs, or by means of spiral
springs or flexible leads joined to terminals hh for connecting to the source of
current.
Assuming that the normal position of the armature is to the left, then the
position of the semaphore arm g will be that shewn in Fig. 1. If now a current
be sent through the armature winding in the proper direction, the armature e
rotates partially and causes the semaphore arm g to be depressed into the position
shewn in Fig. 2; when the direction of the current is reversed, the armature e
and the indicating device 9 move back to their normal position.
Both positions, i.e. the normal and indicating, are made positive by virtue of
the attractive force exerted between the magnet poles d d and the iron of the
armature e, or by the suitable disposition of over balancing weights or springs,
or by a combination thereof.
In some cases two separate windings can be employed for effecting the partial
rotation of the armature e in one direction or the other.
Instead of the permanent magnet e it is obvious that an electro-magnet may
be employed if desirable.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be informed, we declare that what we
claim is:-
The combination of an armature made to move or partially rotate in one
direction or another in a magnetic field by sending through its windings suitable
currents, with a semaphore arm, flag, or equivalent device, so as to produce an
electrical indicating apparatus, positive in action, whether moving the device to
the indicating or to the normal position substantially as described and with
reference to the accompanying drawings.
Dated the 3rd day of August 1900
AUGUST ECKSTEIN.
HERBERT JOHN COATES.