Improvements in and relating to Induction Coils and Electro-magnets.
Year: 1889

page_text: Date of Application, 29th Nov., 1889
Complete Specification Left, 14th Aug., 1890-Accepted, 18th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in and relating to Induction Coils and
Electro-magnets.
We, EDWARD LOVELL LOVELL of Springfield, Castlenau, Barnes, in the County of
Surrey, Gentleman, and ARTHUR FORD LLOYD of No. 254 High Holborn, W.C.,
Engineer, do hereby declare the nature of this invention to be as follows:-
Our invention relates to that type of electro-magnets and induction coils applicable
more particularly to such as are employed in coin-freed electrical machines, telephonic
and other apparatus.
In accordance with our invention we may form an electro-magnet in the
following nanner, that is to say :-
Upon a centre formed either of a solid soft iron pin or of a bundle of soft iron
wires, we wind one or more layers of insulated wire preferably also of soft iron.
Upon this coil of wire is disposed a split tube of soft iron, or preferably a plate of
ferrotype iron, bent into a cylindrical form, which, serving as an electro-magnetic con-
denser, would be secured by a cap attached to each end of the soft iron pin above
mentioned or by equivalent means.
By the means above described of forming an electro-magnet, we are enabled to
dispense with a secondary coil, as the vibratory current obtained from the primary coil
by means of the usual make and break contact interposed in the electrical circuit
serves equally as well as the current induced in a secondary coil; although we may,
under some circumstances, employ a secondary wire, and use the same as an ordinary
induction coil.
D
1
1
COMPLETE SPECIFICATION.
Improvements in and relating to Induction Coils and
Electro-magnets.
We, EDWARD LOVELL LOVELL of Springfield, Castelnau, Barnes, in the County of
Surrey, Gentleman, and ARTHUR FORD LLOYD of 254 High Holborn, W.C.,
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:
Our invention relates to that type of electro-magnets and induction coils applicable
more particularly to such as are employed in coin-freed electrical machines, telephonic
and other apparatus.
Referring to the accompanying sheet of drawings
Figure 1 represents an electro-magnet built up or formed in accordance with our
invention;
Figure 2 is a core detached from the coil;
Figure 3 is a core made up of a bundle of soft iron wire, but with the enclosing
case removed;
Figure 4 is a soft iron rod secured to a piece of nonmagnetic material, and
Figure 5 is a plate of ferrotype the use of which will be fully described.
In accordance with our invention we form the core B of an electro-magnet A
preferably in the following manner :-
Upon a centre formed either of a solid soft iron pin C, or of a bundle of soft iron
wires D we wind one or more layers of insulated wire also of soft iron. Upon this
Price 61

page_text: coil of wire is disposed a split tube E of soft iron or preferably a plate of ferrotype
iron F bent into a cylindrical or tubular form, as shown in Figures 1 and 2, which,
serving as an electro-magnetic condenser, would be secured to a cap a attached to one
end of the soft-iron pin or rod C above mentioned, the other end being mounted upon
a rod G of nonmagnetic metal or material to allow of the core being moved within
a coil of wire A, or both ends of the core may have a cap adapted thereto as may
be desired.
By the means above described, of forming an electro-magnet, we are enabled to
dispense with a secondary coil, as the vibratory current obtained from the primary
coil by means of the usual make and break contact interposed in the electrical circuit
serves equally as well as the current induced in the secondary coil although we may
under some circumstances employ a secondary wire and use the same as an ordinary
induction coil.
:
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,
-
First: The formation and building up of an electro-magnet of a soft iron pin or
bundle of wires upon which is wound an insulated soft iron wire the whole being
enclosed in a split tube of soft iron the whole forming an electro-magnetic
condenser.
Second-In combination with a core made in the manner herein described
the employment of a secondary wire as set forth.
Dated this 19th doo Aument 1000
EDGAR GEORGE,
101, London Wall, E.C., Agent.