Improvements in Electric Heating Apparatus.
Year: 1893

page_text: Date of Application, 31st Aug., 1893—Accepted, 2nd Dec., 1893
COMPLETE SPECIFICATION.
Improvements in Electric Heating Apparatus.
I, JAMES FINNEY MCELROY, of No. 936, Broadway, in the City and County
of Albany, State of New York, United States of America, Manufacturer, 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 :
My invention relates to improvements in heating apparatus; and the object of
my invention is to provide an electric heater particularly adapted for use in offices
or other apartments in which the resistance is placed within a casing similar in
design to a stove.
I attain this obiect by means of the mechanism illustrated in the accompanying
Fig. 4 is a plan of the plate R, and
Fig. 5 is a longitudinal section through one of the cylinders upon which the
resistance is placed showing its connection with the plate R, which is also shown in
section.
Similar letters refer to similar parts throughout the several views.
Within a suitable casing A mounted upon supports a a and supplied with a
removable cap B, I place a series of resistance coils C C supported at the top and
bottom by means of the plates R R. One of the plates R is secured to the base
of the cylinder and the other at the top thereof, and each is provided with a series
of projections P extending toward the centre of the plate, to which is secured by
means of a nut r, one end of the cylinder C¹ upon which the resistance coils C
are placed.
I arrange the cap B in connection with the casing A in such a manner that
there shall be a series of openings DD communicating with the interior of the
cylinder at the top thereof, and I raise the lower end of the cylinder above the
floor or support upon which it rests in such a manner that the air in the apartment
in which it is placed, may pass through the cylinder from the bottom upward and
out at the openings D D. A draft will be maintained through the heater when the
coils C are warmed.
Upon the cylinder C' within the casing A, I coil the resistance C, the cylinder
being constructed of a suitable substance covered with a non-conducting material,
which may be asbestos, porcelain or other non-conductor, and provided at each end
with an insulated cap E, to which is secured the contact rod by means of which
the electric fluid is conducted through the wire f to the coil C. I generally
separate the cap E from the plate R by means of a uut e.
I have shown the resistance wound about the cylinder C₁in a spiral path and
coiled in the form of a spring, as described and claimed in my U.S. Patent
No. 499,363, dated June 13th, 1893, but I do not wish to limit myself to any
particular mode of winding the resistance.
I have shown six cylinders provided with resistance coils combined in my heater.
I connect the contact rods F at each end of the heater by means of a suitable
wire W, and attach one pole of the battery to the wire connecting the upper ends
of the coils, and the opposite pole of the battery to the wire connecting the lower
ends of the coils. I carry the wire from the upper ends of the coils downward
within the casing A passing out near the floor.

page_text: 1 do not limit myself however to the number of resistance carrying cylinders
within the heater, nor to the manner of connecting the coils together.
But what do claim as my invention and desire to secure by Letters
Patent, is
1st. An electric heater consisting of a casing, a series of cylinders within said
casing, a resistance coiled about each of said cylinders, each end of said cylinders
provided with a contact rod, said contact rods connected with each other, an opening
at each end of said casing allowing for the passage of air therethrough, substan-
tially as described and for the purpose set forth.
2nd. In an electric heater, a casing open at the top and bottom, a series of
resistance pieces within said casing, said resistance pieces suitably connected with
each other at each end thereof, one end of said resistance pieces connected with
the positive and the other end with the negative pole of the battery, substantially
as described and for the purpose set forth.
3rd. In an electric heater, the combination of a casing, a resistance carrying
cylinder, a resistance coil mounted on said cylinder, communication between the
interior of said cylinder and the apartment in which it is placed at the top and at
the bottom thereof, a means for connecting each end of said resistance carrying
cylinder with the poles of a battery, substantially as described and for the purpose
set forth.
4th. In an electric heater, the combination of a resistance carrying cylinder, a
resistance placed thereon, an insulated cap at each end of the cylinder, a casing
within which said resistance carrying cylinder is placed, a plate at each end of said
casing, said resistance carrying cylinder mounted in said plate, communication
between the interior of said casing and the apartment in which it is placed at the
top and bottom of said casing, each end of said cylinder connected with the poles
of a battery, substantially as described and for the purpose set forth.
Dated this 30th day of August 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.