Improvements in Electro Magnetic Apparatus for Operating Indicators, Valves, and other Devices.
Year: 1895

page_text: Date o Application, 2nd Mar., 1895-Accepted, 1st June, 1895
COMPLETE SPECIFICATION.
Improvements in Electro Magnetic Apparatus for Operating
Indicators, Valves, and other Devices.
1, OSCAR VON MORSTEIN of Nollendorfstrasse, Berlin Germany, Engineer, 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:-
Electro magnetic apparatus in which two electro magnets are alternately set in
action, for example for the sliding to and fro of a number card of a tableau, or for
opening and closing the cock of a gas supply pipe, have hitherto required separate
electric conductors and contacts for each electro magnet.
This invention has for object to obtain a regular alternating action of two
electro magnets with only one conductor and one contact common to both magnets,
in such a way that the apparatus sball always place automatically in the circuit
that electro magnet the action of which is required upon the next contact or circuit
closure. This close circuiting or reversal of the current is obtained by utilising
the displacements of the two main moving parts of the apparatus, for example the
electro magnet armature and the plug of a cock or the carrying rod of an object to
be moved. Tho reversal of current is completed by the falling back of the armature
after the breaking of the circuit and is attained by the two moving parts, the
displacing and the displaced, being constructed as or provided with contacts.
The Figs. 1 to 6 of the drawings are diagrammatic views of the means for
carrying out the invention.
In Figs. 1 to 2 the part to be displaced is an arm H carrying a circular
number card at its extremity, and the displacing part the armature A of the two
electro magnets O, Z. Both these moving parts are pivotted so as to be capable of
Oscillation in the same plane and the armature A is brought by gravity or by
spring force to the middle or state of rest position. To the armature A are fixed
two hook rods a, b, which upon the attraction of the armature by the electro
maguet Oor Z push the arm over to the right or to the left. Both rods a, b, are
insulated from each other and from the armature A and serve at the same time as
contacts. Rod a is in connection with the electro magnet O, and with 'Z. The
current is conducted to the arm II and according as this bears against a or the
current flows to the electro magnet O or Z. Fer the purpose of a common discharge
of the current the two bobbin ends of the electro magnets are united at K. In the
commencing position (Fig. 14) the armature A bears by its rod or stud a against
the arm H. If now the circuit is closed, for example at C (Fig. 1B) the current
will pass from the battery B through arm H to rod or stud a and to the clectro
maguet which attracts the armature A this latter by its hook rod or stud a then
pushing the arm over to the right so as to bring the number card into view, that
is to say, from a hidden to an exposed position. If the contact at C is now broken
(Fig. 1) the armature A will move back to the middle position and bear by its rod 6
against the arm H whereupon the reversal of current is finished, then upon the next
contact closure the current passes through Hand & to the electro magnet Z and
the armature A now attracted by the latter (Fig. 1º) pushes through its rod b the
arm H back again to the left to hide the number card.
Figs. 3 to 6 shew a similar arrangement applied to open and close the cock of a
gas supply pipe. The part which in this case is moved backwards and forwards is
the plug H of the cock, the displacing part again the armature A. To shew

page_text: clearly how the contacts may be changed there is in this case, inversely to that of
Figs. 1 to 2, the one contact c upon the displacing part the armature A and the
two contacts a and b upon the displaced part, the cock plug H. The current is
conducted to the armature A and to this end the gas pipe R itself may be utilised
as a conductor. The several operations are precisely the same as in the preceding
case, In Fig. 3B there is further arranged in the circuit of the opening electro
magnet a circuit breaking arrangement f, g, for the purpose of producing sparks
and which after the opening of the cock is set in action by a further attraction of
the armature A. Of course the electro maguets may be the moved parts, it being
practicable to carry out the invention in widely differing ways and for widely
differing purposes, for example, to carry off the current from contacts a, b, sliding
springs o, 2, (Figs. 34, 6) may be used. If it be desired that the apparatus after the
performance of the described function should during the same contact closure,
conduct the current to another apparatus say at I (Figs. 2 2 and 4 to 6) for
example to an alarm apparatus or to an inductor the design must be such that a
portion of the current shall flow through the corresponding electro magnet, in this
case O, in order that the release of the armature and the current reversal
corresponding thereto may be prevented. This may be accomplished in the manner,
shewn in Figs. 24, 2" and 4, 4, that in the last moment of the movement, a contact
piece (spring) d shall bear against the contact a, said contact piece d conducting
the current to the apparatus I and as a is in permanent connection with the
magnet both apparatus are now connected in parallel and the resistances of the
system can be so measured that finally only so much of the current shall flow
through the maguet O as is necessary for holding fixed the armature A.
resistances in the two parallel electric circuits may also be regulated by means of
the circuiting arrangement itself. Figs. 5 and 6 show two kinds of this arrangement
which only differ in that the respective contacts are changed. In Fig. 5 the return
conducting spring o leading to the magnet O leaves the contact a at the last moment
of the opening of the cock and places itself against a contact e which is in
connection with a through a resistance picce composed for instance of thin
German silver wire. Thereupon the spring d slides as shewn in Fig. 4B upon the
contact a said spring leading to I. The electro magnet O and the apparatus I are
now again connected in parallel but in the circuit of the magnet there is the
resistance which is so measured that comparatively little current flows through O
the greater portion passing through I. In Fig. 6, the contact piece a leaves at the
last moment the return conducting spring o and places itself against the spring p.
Between p
and O or o is connected the resistance w, of course at the same time a
also placing itself again against d. For this purpose also the method may be
variously modified by altering the contact places.
The
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 1
.claim is :-
1. The automatic alternating connection of two electro magnets in the same
circuit by means of the backward movement of the electro maguet armature or of
its equivalent, substantially as described and shewn..
2. In the arrangements referred to in connection with apparatus I, the automatio
connection of a parallel electric circuit simultaneously with the regulation of the
resistances, substantially as described and shewn.
CAPITAINE & Vox HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.