Improvements in the Manufacture of the Magnetic Parts of Electrical Apparatus
Year: 1893

page_text: Date of Application, 7th Apr., 1893
Complete Specification Left, 8th Jan., 1894-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of the Magnetic Parts of
Electrical Apparatus.
I ANTHONY GEORGE NEW of Palace Chambers Westminster in the County of
London Electrical Engineer do hereby declare the nature of this invention to be as
follows:-
The object of the present invention is to provide an improved means of manu-
facturing cores for choking coils & the magnetic parts of transformers, arc-lamp
regulators, electro-magnets, and dynamo, and other electrical machines, for use
both with direct and alternating electric currents, and which in addition to the
advantages attaching to a high degree of lamination possess also complete freedom
from the noise usually accompanying the use of ordinary laminated iron cores in
connection with alternating electric currents.
My invention also provides a useful field for the working up of all kinds of small
wrought-iron scrap such as filings, turnings, etc. economic utilization of which has
hitherto been found a difficulty.
In carrying out my invention I proceed as follows:-
The wrought-iron filings, turnings or other wrought iron refuse, is mixed with
sufficient cement, plaster of Paris, or other binding material to form the whole
into a solid mass. The mixture is then inserted or poured into a mould of the
shape which it is desired the finished part shall be, & allowed to set. The resulting
mass consisting mainly of wrought-iron will be found to possess all the properties
of an ordinary laminated iron core, while it possesses the further advantage of being.
quite noiseless when energized by an alternating current, thus rendering it specially
suitable for cores of arc-lamp regulators &c.
I may also employ cement or other binding material in a similar manner between
the plates or wires of ordinary laminated cores for the purpose of eliminating the
noise they occasion when magnetised by alternating currents.
Dated this 7th day of April 1893.
Improvements in the Manufacture of the Magnetic Parts of
Electrical Apparatus.
I, ANTHONY GEORGE NEW, of Palace Chambers, Westminster, in the County
of London, Electrical 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 :-
The object of the present invention is to provide an improved means of manu-
facturing cores for choking coils and the magnetic parts of transformers, arc-lamp
regulators, electro-magnets, and dynamo and other electrical machines, for use
both with direct and alternating electric currents and which in addition to the
advantages attaching to a high degree of lamination possess in the case of cores
complete freedom from the noise usually accompanying the use of ordinary
laminated iron cores in connection with alternating electric currents as well as
freedom from heating.

page_text: My invention also provides a useful field for the working up of all kinds of
small wrought iron scrap such as filings, turnings, and the like, the economical
utilization of which has hitherto been found a difficulty.
In carrying out my invention I proceed as follows:-
:-
The wrought iron filings, turnings or other wrought iron refuse is mixed with
sufficient cement or plaster of Paris in powder, and water is then added to form
the whole into a pasty mass.
Suitable proportions of the materials are say equal parts by bulk of the cement
or plaster and the filings though the amount of filings may be considerably
increased acccording to the capacity of the plaster or cement for receiving same
and subsequently setting. It is obvious that other binding materials may be
employed such as glue or resin, rubber or the like, but these I do not deem so
suitable.
The mass produced as above described is then poured or rammed (according to
its condition) into a mould of the shape which it is desired the finished part
should take and allowed to set. This mould in the case of a core for a choking
coil may consist of a longitudinally split tube of metal or other suitable material
the tube being kept open by inserting the ends in slate or similar caps which are
grooved or recessed such grooves or recesses being slightly larger than the tube
so that the latter is kept expanded.
The resulting mass composing the core consisting mainly of wrought iron will
be found to possess all the properties of an ordinary laminated iron core, while it
possesses the further advantage of being quite noiseless when energized by an
alternating current, thus rendering it specially suitable for cores of arc-lamp
regulators &c.
I may also employ cement or other binding material in a similar manner between
the plates or wires of ordinary laminated cores for the purpose of eliminating the
noise they occasion when magnetised by alternating currents.
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 improvements in the manufacture of cores for choking coils and the
magnetic parts of electrical apparatus consisting in forming same of iron filings,
scraps or the like, and a binding material such as plaster of Paris.
2. The improved cores or magnetic parts of electrical apparatus composed of
iron filings, scrap or the like, and a binding material such as plaster of Paris.
3. The improvements in the manufacture of the magnetic parts of electrical
apparatus substantially as described.
Dated the 6th day of January 1893.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicant.