US706099A - Electric furnace. - Google Patents

Description

Patented Aug.5, |902.

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. No. 706,099. Patented Aug. 5, |902.

. A. PARKER.

ELECTRIC FUBNAGE.

(Application led May 8, 1901.) (lo luel.) 3 Sheds-shunt 2.

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No. 706,099. Patented Aug. 5', |902.

A. PARKER.

ELECTRIC FURNACE.

(Application tiled May 8, 1901.)

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ARTHUR PARKER, OF CHORLEY, ENGLAND.

ELECTRIC FU RNACE.

SPECIFICATION forming part of Letters Patent No.

706,099, dated August 5, 1902.

Application filed May 8, 1901. Serial No. 59,321. (No model.)

To a/ZZ whom it may concer/1,:

Be it known that I, ARTHUR PARKER, a British subject, and a resident of Chorley, in the county of Lancaster, England, have in'n vented certain new and useful Improvements in Electric Furnaces, of which the following is a specification,

This invention relates to electric furnaces for smelting or other purposes, more particuro larly for producing Carbids of the alkalineearth metals, such as calcium carbid, and is designed to secure a more Complete, perfect, and Continuous fusion of the raw material, that the fused mass in the Crucible shall be brought continually within the arc, and to avoid the clogging at present so frequent between the positive, carbon' and the mass in the Crucible.

It consists, essentially, in a special con- -Qo struction of the furnace or Crucible with a 3o form of the Crucible.

rotary or revolving movement, so as to bring every part of the bottom in turn under the positive Carbon, which is preferably made of rectangular oblong shape in cross-section.

The invention will be fully described with reference to the accompanying drawings.

Figure l is a front elevation. Fig. 2 is a transverse sectional elevation. Fig. 3 is a transverse sectional elevation of a modified Fig. 4E is a section of the carbon-holder on line an; Fig. 5, a plan of modification shown in Fig. 3.

The Crucible a is mounted or supported upon a platform or structure l), capable of rotating about its vertical axis on the fixed or stationary bed or foundation plates c, which are firmly secured to and suitably insulated upon the supporting blocks or pillars d. The platform b, which supports the crucible a, is

4o heldin position by the recessed base c, the

around or attached to the base.

foundation-plate c being made in two or more parts or sections and secured in position around the base c, and it is rotated by a worm gearing with the toothed wheel gj, formed By this or c, is slowly ro- The platform Z) other mechanism the Crucible tated about its vertical axis.

is formed with hollow sides U, forming a water-jacket for the purpose of keeping the 5o platform cool.

The carbon 71, is oblong in cross-section, either rectangular or oval, so as to extend across the crncible a in one direction and leave sufficient room at the sides for the material to fall in from the hoppers or Chutes 7c.

The carbon 7L is fitted to a sliding rack or frame m, capable of moving up and down in a slide u. When iu operation, it is slowly moved upward by the worm o and wormtoothed wheel p as the material fills up the Crucible.

The powdered material to be fused is fed into the Crucible a from the hoppers or Chutes t in a thin stream through mica or other suitable tubes arranged to direct the material so that it shall fall into or through the arc, and thus become fused before reaching the crucible itself. l'n addition to this the rotation of the Crucible a brings all the material in it successively over and over again into the range of the arc. It is, however, to be understood that the arc is struck between the positive carbon and whatever material may be in the Crucible and not between the positive carbon and the Crucible through the material. carbon 7L does not, therefore, come 4into Contact with the material throughout the whole operation. This is made possible owing to the fact that the Calcium-carbid charge becomes conductive in operation, owing to the fact of its high temperature.

The furnace or Crucible a is preferably constructed with a lining a; of carbon on the bottom and around the sides, the whole of which can be removed with each Charge as it is complete.

The invention is also applicable to smeltingfurnaces, such as shown in Fig. 3, with a taphole r for running oif the molten mass. A truck or vessel s may be provided to receive it. in other respects the furnace is construct ed as described above.

l am well aware that a rectilinear` reciprocating movement hasbeen given to an electric furnace, and such does not constitute any part of my invention.

What I claim as my invention, and desire to protect by Letters Patent, is

In an electric furnace the combination with the crucible a and positive-Carbon electrode 7L placed diametrically across the Crucible, of the rotatable supporting-platform b, the recessed base e, the supporting-plate c in two parts with recess into which the pl ai'fornnbase bs, the Worm-Wheel g around its periphery, my name in the presence of two subscribing the wolm ffelaringtvith tthe *fieei g, ie Witnesses. chutes s to e iver e ma cria irect in o Y the arc, and mechanism for raising 'the carbon ARTHUR PARKER" 5 electrode h as the Crucible iiHs substantially NVitnesses:

as described. J. OWDEN OBMEN,

In Witness whereof I have hereunto signed B. TATHAM .VOODHEAD.

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