A Polarised Electrical Indicator.
Year: 1891

page_text: Date of Application, 6th Nov., 1891
Complete Specification Left, 27th July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
A Polarised Electrical Indicator.
We, SIEMENS BROTHERS & Co. LIMITED, of 12 Queen Anne's Gate, West-
minster in the County of Middlesex, and ALEXANDER SELGIUS SCHLOEMER, of
No. 1, Fair Field, Old Charlton, in the County of Kent, Electrical Engineers,
do hereby declare the nature of this invention to be as follows:-
This invention relates to a simple form of polarised indicator which, when acted
on by electrical currents transmitted from a distance, presents through a hole in a
dial or screen marks distinguished in colour, form or number serving to indicate
predetermined signals. For this purpose, a soft iron armature is made consisting
of an axis from which project two arms each terminating in a cylindrical segment
extending about one quarter round. This armature is mounted between the poles
of a magnet, which may be of horse shoe form, or may consist of a pair of parallel
bar magnets having the poles facing each other opposite, in which case it is pre-
ferred to employ two armatures, one mounted between each pair of poles. Several
coils of insulated wire are wound on the arms of the armature, this wire being
connected to the line from a distant station.
Normally, the armature being magnetised by induction from the magnet or
magnets (which may be either permanent or electromagnets of constant polarity)
is held with its cylindrical segments presented towards the poles, but when an
electrical current is transmitted through its coil, it is caused to turn partly round
its axis in the one direction or the other according to the direction of the current.
Instead of making the armature of soft iron, it may itself be a magnet, the magnet
or magnets between the poles of which it is mounted being electromagnets having
their coils connected to the line from a distance.
In either case, the armature can be enclosed in a non-magnetic cylindrical casing
having on it marks which are presented through a hole in a screen or dial to serve
as signals. Or the axis of the armature may carry a disc with signal marks on it,
or an index moving over a dial. If desired, the current which actuates the
indicator may be made also to cause a gong or bell to sound calling attention to
the signal.
On cessation of the current which causes deflection of the armature, the indicator
retains the position to which the current moves it; it is reset to normal position by
transmitting a reverse current.
Dated this 6th day of November 1891.
ABEL & IMRA
Agents for the Applicants.
COMPLETE SPECIFICATION.
A Polarised Electrical Indicator.
We, SIEMENS BROTHERS & Co. LIMITED of 12 Queen Anne's Gate, West-
minster in the County of Middlesex, and ALEXANDER SELGIUS SCHLOEMER of
No. Fair Field, Old Charlton in the County of Kent, Electrical Engineers, 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 :-
This invention relates to a simple form of polarised indicator which, when acted
on by electrical currents transmitted from a distance, presents through a hole in a
dial or screen marks distinguished in colour, form or number, serving to indicate
predetermined signals

page_text: For this purpose, a soft iron armature is made consisting of an axis from which
project two arms each terminating in a cylindrical segment extending about one
quarter round. This armature is mounted between the poles of a magnet, which
may be of horse shoe form, or may consist of a pair of parallel bar magnets having
the poles facing each other opposite, in which case it is preferred to employ two
armatures, one mounted between each pair of poles. Several coils of insulated
wire are wound on the arms of the armature, this wire being connected to the line
from a distant station.
Normally the armature being magnetised by induction from the magnet or
magnets (which may be either permanent or electromagnets of constant polarity)
is held with its cylindrical segments presented towards the poles, but when an
electrical current is transmitted through its coil, it is caused to turn partly round
its axis and take a position opposite to that which is held, until it is turned back
by transmission of a reverse current. Instead of making the armature of soft
iron, it may itself be a magnet, the magnet or magnets between the poles of which
it is mounted being electro magnets having their coils connected to the line from a
distance.
In either case, the armature can be enclosed in a non-magnetic casing having on
it marks which are presented through a hole in a screen or dial to serve as signals.
Or the axis of the armature may carry a disc with signal marks on it, or an index
moving over a dial. If desired, the current which actuates the indicator may be
made also to cause a gong or bell to sound calling attention to the signal.
On cessation of the current which causes deflection of the armature, the indicator
retains the position to which the current moves it; it is reset to normal position by
transmitting a reverse current.
Figure 1 of the accompanying drawings is a perspective view shewing the soft
iron armature A mounted between the poles N S of a permanent horse shoe magnet.
The middle of the armature is wound with insulated wire to and from which currents
are transmitted by the leads L L.
Figure 2 shews the armature A; itself a permanent magnet with cylindrical
polar terminations N S mounted in the gap of a piece of soft iron of horse
shoe shape having its limbs wound with insulated wire constituting it an electro
magnet.
Figure 3 is a front view of the screen B behind which the armature is mounted,
a hole H being provided through the screen through which can be seen the words
or marks on the cylindrical casing C of the armature A.
Figure 4 is a section of the instrument when the parts are as shewn in Figure 1.
As shewn in Figure 5 the indications are on a disc D which is fixed on the axis
of the armature behind a screen B with segmental hole H.
The instrument may be duplicated to operate within a signal box such as is
shewn in Figure 6, there being as shown in Figure 7 two armatures A A' mounted
between two permanent magnets N. S.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
A polarised electrical indicator wherein an armature either electrically or per-
manently magnetised and made with cylindrical segments is mounted between poles
of a permanent or electro magnet so as to be turned partly round when an electric
current is transmitted through the coils of the armature or magnet, thus presenting
a changed indication and to be turned back to its former position when a reverse
current is transmitted substantially as described.
Dated this 27th day of July 1892.
ABEL & IMRAY,
Agents for the Applicants.