Improvements in or relating to Shields or Guards for the Carbon Pencils Used in Electric Furnaces.
Year: 1898

page_text: Date of Application, 8th Sept., 1898
Complete Specification Left, 8th June, 1899-Accepted, 22nd July, 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Shields or Guards for the Carbon
Pencils Used in Electric Furnaces.
I, JOSEPH BASTICK, of 110, Golden Hillock Road, Small Heath, Birmingham,
in the County of Warwick, Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in shields or guards for protecting the
carbon pencils employed in electric furnaces that are used for smelting and
refining purposes.
Its object is to provide an adjustable guard or shield that will protect the
carbon pencil from the action of the electric current or gases of the furnace,
except at the point of fusion.
According to this invention the guard or shield may be made of metal, such
as wrought or cast iron, or gun metal, or a combination of the two or more of
such materials; and it is filled with any suitable non-conducting material or
materials such as asbestos or fireclay, or the like.
The shield or guard may be suitably connected to the carbon pencil holder
so as to be moved up and down or rotate or move with it. But in addition to
the just named movement or movements the shield or guard may be arranged
so as to be capable of independent adjustment on or about the carbon pencil by
any suitable and convenient mechanical means, such as, say, a slide, rack and
pinion and hand wheel, or by gearing, or screw, or screws or the like so that
the carbon pencil is only exposed at the point of fusion.
Carbon pencils provided with guards or shields as described, are protected
from the action of the electric current and gases generated or set free in the
furnace, and will last longer than those used in the ordinary manner.
Dated this Seventh day of September 1898.
JOSEPH BASTICK,
By W. Fairburn-Hart,
Agent.
Improvements in or relating to Shields or Guards for the Carbon
Pencils Used in Electric Furnaces.
I, JOSEPH BASTICK, of 110, Golden Hillock Road, Small Heath, Birminghair,
in the County of Warwick, Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This infantion molator to imunomoments in abielle on cuands for pratacting the

page_text: carbon pencils employed in electric furnaces that are used for smelting and
refining purposes.
Its object is to provide an adjustable guard or shield that will protect the
carbon pencil from the action of the electric current or gases of the furnace,
except at the point of fusion.
In the drawings hereunto annexed ;-
Fig. 1 is a sectional elevation of an electric furnace with this invention applied.
Fig. 2 an enlarged part sectional elevation of a carbon pencil and its holder
with a shield or guard applied.
Fig. 3 an elevation of same drawn at a right angle to Fig. 2.
Fig. 4 a plan of same looking at the top.
At Fig. I have shown the invention applied to an electric furnace similar
to that described and illustrated in the Specification of Letters Patent to William
Arthur Thornton and myself the eighth day of December 1897, No. 29011, but
I would have it understood that the invention may be applied to the carbon
pencils of other electric furnaces.
A is the brickwork of the electric furnace, B the flues, C the carbide box
receiving a reciprocating motion from worm wheel D. E the carbon pencil
mounted in the holder F and retained in position therein by, say, wedges G.
The carbon pencil E, in addition to being raised and lowered is capable of being
independently rotated by means of worm gearing I. J the boxes or trucks for
receiving the calcium carbide as it leaves box C.
All the above described parts, as well as those not herein described or shown,
may be of a similar description and operated in a like manner to those described
in the herein before mentioned specification.
According to this invention the guard or shield K may be made of any desired
size, shape, and length, say, square as shown, and of metal, such as, say, wrought
or cast iron, or gun metal, or a combination of two or more of such materials;
and it is filled or lined with any suitable non-conducting material or materials L
such as asbestos or fireclay, or the like.
The shield or guard K may be suitably connected to the carbon pencil holder
F, by, say, a stud M and nut N, or set screw arranged to work in a slot 0,-
so as to be moved up and down or rotate or move with the carbon pencil E and
its holder F. But in addition to the just named movement or movements the
shield or guard K may be arranged so as to be capable of independent adjustment
on or about the carbon pencil E by any suitable and convenient mechanical
means, such as, say, a slide, or as shown in the drawings by a rack P on the
shield and pinion Q (gearing with the rack) mounted on shaft R, carried by the
bearing lugs S fixed to the carbon pencil holder F, and arranged to work in
slots T formed for their reception in the shield or guard K. A rotary motion is
imparted to shaft R by a hand wheel U mounted thereon. Or the shield K may
be adjusted by worm or other gearing, or by screw, or screws or the like so that
the carbon pencil E is only exposed at or about the point of fusion.
Carbon pencils provided with guards or shields as described, are protected
from the action of the electric current and gases generated or set free in the
furnace, and will last longer than those used in the ordinary manner.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I would have it
understood that I am aware that electric furnaces have been employed for many
years prior to the date of this application for the reduction of metals, in which
processes coke and lime have been used, also that calcium carbide has been
previously produced by the fusion of coke and lime in the electric furnace, in
which carbon pencils have been used, I therefore do not broadly claim the use
of such carbon pencils for the purposes named except when formed and arranged
in the manner herein before described, but what I do claim is:-
1. A shield or guard, such as herein described and illustrated, for carbon

page_text: pencils used in electric furnaces, said shields or guards being mounted upon the
carbon pencil and its holder so as to be capable of being moved with it, but at
the same time independently adjusted thereon, as and for the purposes described.
2. The combination with the carbon pencil or pencils of an electric furnace of
a protecting shield or guard having a filling of non-metallic material interposed
between it and the carbon pencil or pencils, and the means described for adjusting
the shield upon the said pencil or pencils independently of any movement that
may be imparted to the latter, all arranged substantially as and for the purposes
herein described and illustrated.
Taal 1:41.
eT
1000