Year: 1897

page_text: Date of Application, 14th July, 1897
Complete Specification Left, 5th Apr., 1898-Accepted, 7th May, 1898
I, HENRY EDMUNDS, of 39, Victoria Street, in the City of Westminster, Electrical
Engineer, do hereby declare the nature of my invention to be as follows:-
My invention has for its object to provide a device which can be very readily and
economically made and which is very efficient for electrical heating purposes.
According to my invention I take two discs or plates of copper or equivalent
material and I connect them at their centres or mid-portions by a distance piece or
button so as to leave between the discs or plates a space sufficient to accommodate the
conductor or conductors which is or are to be used for effecting the heating by
electricity the said conductor or conductors being of a description which will give the
necessary degree of resistance to convert the electricity passed through it or them
from any suitable generator into heat. One end of the conductor (or of each of the
conductors) is passed to outside one of the discs or plates which is most conveniently
effected by making a radial slit in the said disc or plate extending up to the central
distance piece or button and the conductor or conductors is or are then wound upon
the said distance piece or button and in successive convolutions until it fills or they
fill the space between the two discs or plates and the end or ends is or are brought
out at, or towards the periphery or edges of the said discs or plates. The conductor
or conductors is or are covered with asbestos or other suitable insulating material.
The peripheries or edges of the two plates or discs are then joined together or
covered by a lid or the like which may be done for example by making one disc or
plate larger than the other so that its edge extends beyond the edge of the other disc
and forms a seat for the flange of the rim of the lid which can be secured thereto
with an air tight closure. The unoccupied spaces between the discs can be filled up
with cement or other like material and the under disc may have applied to it discs or
layers of asbestos or other non-conductor of heat to allow of the heater being used
without injury to the table or article on which it may be placed.
An Improved Device to be Used for Electrical Heating Purposes.
I, HENRY EDMUNDS, of 39, Victoria Street, in the City of Westminster, Electrical
Engineer, do hereby declare the nature of my invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
My invention has for its object to provide a device which can be very readily and
economically made and which is very efficient for electrical heating purposes.

page_text: I will describe my invention with reference to the accompanying drawing which
illustrates the device in underside plan in Figure 1 and cross section in Figure 2.
According to my invention I take two discs or plates A A¹ of copper or equivalent
material and I connect them at their centres or mid-portions by a distance piece or
button B so as to leave between the discs or plates a space sufficient to accommodate
the conductor or conductors C which is or are to be used for effecting the heating by
electricity the said conductor or conductors being of a description which will give
the necessary degree of resistance to convert the electricity passed through it or
them from any suitable generator into heat. One end of the conductor c¹ (or of each
of the conductors where more than one is used) is passed to outside one of the discs
or plates which is most conveniently effected by making a radial slit D in the said
disc or plate extending up to the central distance piece or button B and the conductor
or conductors C is or are then wound upon the said distance piece or button and in
successive convolutions until it fills or they fill the space between the two discs or
plates A A¹ and the end or ends e² is or are brought out at, or towards, the periphery
or edges of the said discs or plates through the aforesaid slit. The ends c¹ c² of the
conductor Care secured to binding screws c3 by which the device can be connected
with the external circuit. The conductor or conductors, is or are covered with
asbestos or other suitable insulating material. The peripheries or edges of the two
plates or discs A A¹ are then enclosed by a plate or cover E or the like or as shewn
in the drawing by making one disc or plate A¹ larger than the other A so that its
edge extends beyond the edge of the other disc or plate and forms a seat for the
flange of the rim of the lower plate or cover E which can be secured thereto with
an air-tight closure by being brazed, rivetted or by other suitable means. The
unoccupied spaces between the discs A and A¹ and the plate or cover E can be filled
up with cement or other like materials and the under plate or cover may be provided
with feet F as shewn or it may have applied to it discs or layers of asbestos or other
non-conductor of heat to allow of the heater being used without injury to the table
or article on which it may be placed.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that what I
claim is
1. An improved device for electrical heating purposes comprising discs or plates
connected at their centres by a distance piece or button between which plates a
suitably insulated conductor or conductors is or are wound and enclosed in a cover
substantially as herein before described.
2. The combination of parts constituting an electrical heating device substantially
as hereinbefore described and illustrated by the drawings.
T
1000