US1326794A - sinding-larsen - Google Patents

Description

A. SINDING-LARSEN. METHOD AND MEANS FOR THE UTILIZATION OF THE THERMIC EFFECT OF CATHODE RAYS.

, APPLICATION FILED OCT. 30 I918.

Patented Dec. 30, 1919.

2 SHEETS-SHEET I.

4 A. SINDING-LARSEN. METHOD AND MEANS FOR THE UTILIZATION OF THE THERMIC EFFECT OF CA APPLICATION FILED ocr so. 191s.

THODE RAYS.

1,326,794. Patented vDec. 30,1919.

2 SHEETS-SHEET 2.

aeenea.

res are onrron.

ALF SIINDING-LARSEN, OF VESTRE AKER, NEAR CHRISTIANIA, NORWAY.

METHOD AND MEANS FOR, THE UTILIZATION OF THE THERMI C EFFECT OF GATHODIL RAYS.

Specification of Letters latent. Pate t d D643. 3% 1919 Application filed October 80, 1918. Serial No. 260,407.

ments in Methods and Means for the Utilization of the Thermic Effect of Cathode-Rays; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon,

which form a part of this specification.

This invention has for its object a method as well as means for the utilization of the thermic efiect of cathode rays.

According to the present invention an effi cient utilization of the thermic effect of cathode rays is obtained by means of collecting the rays by some known means so as to form a narrow pencil of a greater or less extension.

The object of this arrangement is not only to produce a concentrated action of the thermal power of the rays, but more particularly to allow of passing the rays from the comparatively wide space in which the cathode is arranged through a narrow opening to the space where the heat is to be uti-' a crucible.

lized for instance for the purpose of heating This arrangement enables the object to be heated of being placed in a compartment, which is efficiently insulated against loss of heat by radiation, so that substantially all the heat produced by the rays is taken up by the object to be heated, while comparatively only a small quantity of .heat can be given off by radiationthree cathods being provided. Each of the said cathodes is connected to its phase of the current. It is obvious however, that any other type of current may be used for carrying the invention into effect.

In the drawings Figure 1 is a vertical section of a furnace, and Fig. 2 is a horizontal section.

In the drawing A is the brickwork of the furnace inclosed in a casing B. In the top of the furnace is centrally arranged a heating compartment E, in which a crucible may forinstance be placed. The compartment is closed by means of a block D, on which is placed a cover C.

The lower part of the furnace is divided by three partitions in three compartments communicating with each other and inclose the electrodes G, which comprise concave plates carried at the end of insulators introduced through the brickwork. in the axial direction of the electrodes a narrow opening F is provided between the said heating compartment E and the electrode compartments, the concavity of the electrode surfaces being sov adapted as to cause the rays to cross one another or focus just in this narrow opening. The rear surfaces of the electrodes may be insulated and may be provided with cooling means. J is a tube with a mirror H inserted in the upper part of the brickwork. Through this tube the openings and their surroundings can be inspected so that the cathodes may be adjusted if the rays happen not to project exactly into the opening. N is a pipe with a valve 0, communicating with a large vacuum container, in which a vacuum maintained by means of a pump. The vacuum container is of such large volume as to'compensate for accidental evolutions of gas in the cathode compartments.

In the illustrated example and also when other alternating current is made use of the electrodes alternately serve as cathodes and as anodes, special anodes being thus not 1. Method of utilizing the thermic effect rays, so as to produce a narrow pencil of rays passmgthe so condensed rays through a narrow opening .into a heat' insulating chamber for incloslng the object to be heated and causing the rays to at upon the said ob- Jct;

2. Apparatus for the utilization of the I thermic effect of cathode rays comprising means for producing cathgde rays, means for thecollection of the rays so as to produce a narrow pencil of rays, a heat insulating body inclosing the object to be heated, a narrow-opening in this heat insulating body and means to cause the pencil of rays to project through this narrow opening and on tothe object: to be heated.

nected to'a vacuum pump through a pipe in which is inserted a vacuum container of such a volume as to allow of an instantaneous compensation for 'accidental evolutions of 5. Apparatus for .the ut1l1zat1on of cathode rays as defined in claim 2 in which the cathodes producing the rays are constructed as concave mlrrors.

6. Apparatus constructed in accordance with claim 2 in which the back of the electrode is electrically insulated and provided with a cooling arrangement 7. Apparatus for the utilization of the thermic efi'ect'of cathode rays, comprising ak furnace having an electrode chamber,

means in said chamber for focusing cathode rays, a melting chamber separated from'the electrode chamber and connected thereto by a smalLdireot opening and said rays being focuse diin said opening.

Apparatus for the utilization of the thermic effect of cathode rays, comprising a furnace having a plurality .of connected chambers, means in each chamber for focus ing cathode rays, a heating and melting chamber separated from said connected chambers and having a direct opening connecting said heating and melting chamber with each furnace chamber, the cathode rays being focused in said openings.

9. Apparatus for the utilization of the thermic efiect of cathode rays, comprising a furnace having a plurality of connected chambers, means in each chamber for focusing cathode rays, a heating and melting chamber separated from, said connected chambers and having a direct opening connecting said heating and melting chamber with each furnace chamber, the cathoderays being focused in said openings, and means to maintain exhaustion chambers. I

10. The method of utilizing'vthe thermic efiI'ect of cathode rays, which comprises separately focusing the rays emanating from a plurality of electrodes through separate of the connected openings into a chamber containing the ob-,

ject to be heated.

11. The method of utilizing the thermic effect of cathode rays, which comprises maintaining electrodes in'separate communicating exhausted chambers and separately focusing the rays from each electrode through a narrow opening into a closed chamber containing the object to be heated.

12. The method of utilizing the ,thermic effect of cathode rays, which com rises focusing the cathode rays at a smal opening 1 in the heating chamber, and heating an object in said chamber beyond the focus of therays. 4

In testimony that I claim the foregoing as my invention, l. have signed my name in presence of two subscribing witnesses.

' ALF SINDING-LARSEN.

. Witnesses:

. C. FABRICIUS HANsEN,

EMAR W. DIESERUD.

Images