Improvements in Electro-magnétic Telegraph Apparatus.
Year: 1889

page_text: Date of Application, 30th Oct., 1889
Complete Specification Left, 30th July, 1890-Accepted, 30th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Electro-magnétic Telegraph Apparatus.
I, FRANZ XAVER BACHMANN, of Wahring, near Vienna, Herrengasse 15, in the
Austrian Empire Electrician, do hereby declare the nature of this invention to be
as follows:-
My invention relates to improvements in electro magnetic telegraph apparatus ;
and its objects are to increase the utility of the magnetic field, to simplify the
apparatus by the application of a spiral spring regulating device upon a metal base,
and to make them less subject to climatic influence.
In carrying my invention into effect, I provide a core connected to or made in one
piece with the two pole-pieces. The core is wound with a fine wire. The pole-pieces
rest upon a metal bar lying parallel with the axis of the core.
The armature is pivotted to move in a plane parallel with the axis of the core, and
at a point therein equidistant between the two pole-pieces.
The latter are recessed to receive the ends of the armature.
The armature may be either a soft iron bar, a permanent magnet or an electro
magnet.
The apparatus above described is fixed by the bridge to a metal base. Two standards
are provided, preferably by punching tongues in the said plate and turning them up.
Through these standards a square screw is adapted to be moved backwards and
forwards by means of a milled head between the standards bored. and tapped to fit the
said screw.
A spiral spring connects one arm of the armature to the screw, being thereby
adapted to return the same after the current has ceased.
When the armature is a permanent magnet, my invention may be operated by an
intermittent current.
Dated this 29th day of October 1889.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Electro-magnetic Telegraph Apparatus.
I, FRANZ XAVER BACHMANN, of Wahring, near Vienna, Herrengasse, 15, in the
Austrian Empire, Electrician, 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 improvements in electro magnetic telegraph apparatus,
and its objects are to increase the efficiency of the magnetic field; to simplify the
apparatus by the application of a spiral spring regulating device upon a metal base,
and to make them less subject to climatic influence.
It has hitherto been the custom to use two coils, but according to my present
invention I use only one coil, and in combination with it, a single armature pivotted
by its centre so as to move in a plane parallel with the axis of the coil, and a special
spring device for regulating the action of the armature.
Referring to the accompanying drawings which are to be taken as part of this
specification,
Bio is a side elevation ·

page_text: Fig. 4 is an inverted plan after the removal of the base plate :
Fig. 5 is also an inverted plan shewing the use of a permanent armature :
Fig. 6 is the same, but with an electro magnetic armature:
Fig. 7 is a plan of the invention :
Fig. 8 is a perspective view of the standards of the spring regulating device;
and
Fig. 9 is a side view of the invention.
K is a core, either in one piece with, or firmly connected to, the pole-pieces P, P¹.
The core is wound with a fine copper wire, thereby producing the relay coil or
magnet M.
The two pole-pieces rest on the bridge-piece V.
Their opposite sides are bevelled, as shewn in Fig. 4, producing the two plane
surfaces, n. The armature A A' is pivotted at g so that its ends can come into
close contact with the said surfaces, thereby forming a very powerful field.
The said armature may be either a soft iron bar, as illustrated in Figs. 1 to 4, a
permanent magnet as in Fig. 5; or an electro-magnet as in Fig. 7.
My improved armature having its pivot at g forms a double lever of equal lengths,
and consequently the pole-pieces act upon it with equal energies in equal times.
My improved relay with the bridge piece is fastened to a metal base plate Q by
screws.
Referring to Figs. 7, 8, and 9, y, y are a pair of standards produced by stamping
them along their sides and outer ends out of the base plate Q, and turning them up.
The standards are perforated to receive a screwed square rod i, and, as the holes in the
standards are also square, the screwed rod can only move backwards and forwards
through them, and as the milled nut m on the said rod is turned.
R is a spring connecting the rod end and the armature, and is thereby adapted to
return the latter after the cessation of the current.
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 I
claim is :-
:-
1. The combination of a single magnet and a single centrally pivotted armature,
as and for the purpose set forth.
2. The combination of metal base plate, standards produced out of the said plate,
and the spring regulating device, as set forth.
3. The use of the combination claimed in the first claim having a permanent
magnet with a reversed or intermittent current.
Dated this 30th day of July 1890.
1
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.