Improvements in Electrical Transformers.
Year: 1891

page_text: Date of Application, 4th Feb.; 1891
Complete Specification Left, 2nd Nov.; 1891-Accepted; 5th Dec., 1891
ΥΠΟ
ONAL SPECI ATION.
Improvements in Electrical Transformers.
Wé, CASPER BAUr, Ph. D.. of Grove Cottage, Fairfield Road, Old Charlton,
in the County of Kent, and WILHELM DIESELHORST, of 28 Wellington, Road,
Old Charlton, in the County of Kent, both Electrical Engineers, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to a construction of éléctrical transformers in such a
manner as to afford facilities for their manufacture and to produce them in a
convenient form for use.
For this purpose we first make a length of flexible stranded rope of soft iron
wire; and we cover this with insulating material. On this as a core we place in
several ways the primary and secondary wires required for the transformer.
According to one arrangement, we wind, in one layer or in several layers an
insulated wire or other conductor over the insulating material of the core, we
cover this again with insulating material, and on this we wind in one layer or in
several layers another insulated conductor which we also cover with insulating
material. Either of the two conductors may be used as primary or as secondary,
being suitably proportioned according to the purpose for which the transformer is
required. The second conductor, instead of being wound on the insulating covering
of the first conductor, may be wound in bobbins which can be strung on this
covering. Also, both conductors may be wound on bobbins and these can be strung
on the insulating covering of the iron core, the conductors of the various bobbins
being connected so that the one set of them form the primary and the other set form
the secondary coil.
Instead of thus winding the primary and secondary conductor on separate bobbins,
both conductors may be wound on one bobbin, and a number of these bobbins can
be strung on the core.
Dated this 4th day of February 1891.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Electrical Transformers.
We, CASPER BAUR, Ph. D. of Grove Cottage, Fairfield Road, Old Charlton,
in the County of Kent, and WILHELM DIESELHORST, of 28 Wellington Road,
Old Charlton, in the County of Kent, both 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 :-
Our invention relates to a construction of electrical transformers in such a
manner as to afford facilities for their manufacture and to produce them in a
convenient form for use.
For this purpose, we make as a core a length, preferably a considerable length,
of flexible stranded rope of soft iron wire, and we cover this with insulating
material, on which we wind in one layer or in several layers an insulated wire or
other conductor. We cover these windings with insulating material, on which we
again wind insulated wires or other conductors, finally covering these with insulating
material. Both coils are preferably wound in close convolutions uniformly
distributed along the core.
Either of the two sets of windings may be used as primary or as secondary coil,

page_text: the sectional area of the wire or conductor being in each case suited to the current
which it has to carry. In some cases it is of advantage to wind one of the coils in
sections with intervals between them, all these sections being connected in series.
A transformer constructed as above described can be readily made by machinery
requiring scarcely any manipulation, and in its finished condition it can be bent or
coiled as required to suit the position which it may have to occupy.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
An electrical transformer consisting of soft iron rope as core insulated and
wound with two coils of insulated wires or other conductors, substantially as
described.
Dated this and day of November 1901
ABEL & IMRAY,
Agents for the Applicants.