US1919988A

US1919988A - Rectifier

Info

Publication number: US1919988A
Authority: US
Publication date: 1933-07-25
Anticipated expiration: 1950-07-25

Description

July 25, 1933. RUPP 1,1,988

RECTIFIER Filed Jan. 31, 1950 fH/fl for Emil Rap v Patented July 25, 1933 I UNITED STATES PATENT OFFICE EMIL RUPP, OF BERLIN-FROHNAU, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK RECTIFIER Application filed January 31, 1930, Serial No. 424,997, and in Germany February 8, 1929.

My invention relates to rectifiers and more particularly to dry rectifiers comprising layers of metals, such as copper, iron, manga nose or the like, and metal-compounds, such as copper oxide, lead sulfide or the like contacting with each other.

It is an object of my invention to provide a dry rectifier of the kind aforesaid in which the electrical resistance of the contact surfaces of the layers and the resistance of the metal compound layer is very small.

It is a further object of my invention to provide means whereby dry rectifiers with small resistances of the contact surfaces of the metal compound layers and the metal layers and of the metal compound layer may be roduced. p

t is still another object of my invention to produce layers of metal or of metal compound by depositing the metal or the metal compound from the vapor state in a high vacuum on a base or carrier, such as a metal plate or a metal layer deposited in the same manner. By this method a very thin layer of a metal composition may be deposited on a metal, so that the contact resistance and the resistance of the layer are very small.

In the drawing afiixed to this specification and forming part thereof a rectifier embodying m invention is illustrated diagrammatically by way of example at a greatly exaggerated scale. a

1 is a support, for instance a metal plate consisting in the preferred form of my invention of copper. 2 is a layer of metal, for instance-also copper. 3 is a layer of a metal compound, such as, for instance, copper oxide or lead sulfide orthe like, and 4 is a layer of some other metal, such as iron or 4 manganese. The layer 2 is arranged on the copper plate 1 by depositing the metal (copper) from copper vapor in a high vacuum. The layer 3 is arranged on the layer 2 in a similar manner by depositing the metal compound, (copper oxide or lead sulfide) from the vapor state in a high vacuum. The layer 4 conslsting of iron, manganese or the like is deposited upon the layer 3 in the same manner. Upon the layer 4 a layer 12 of the same metal as layer 2 1s deposited and so on.

The layers 13, 14, 22, 23, 24, 32, 33 and 34 are deposited in the same manner. The rate of depositing may be controlled so that the thickness of the layers may be made very small. The thickness of each of the layers 3, 13, 23, and 33 is preferably about 0.001 nuns, and the thickness of the metal layers 2, 4, 12, 14, 22, 24 and 32 about 0.01 mms. The metal from which the uppermost layer 34 is made is deposited upon the layer 33 to a thickness of about 0.1 mm, so that a wire 5 or the like may be fixed to it.

In this manner a rectifier column comprising a large number of layers is obtained. which is particularly adapted for the rectification of high alternating voltages.

In some cases a single layer of each kind will be suflicient, so that the rectifying device then comprises merely the layers 2, 3, 4.

If the support 1' consists of the same metal as the layers 2, 12, 22, and 32, the layer 3 may be deposited directly on the support 1.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for 'obvious modifications will occur to a person skilled in the art. i

In the claims affixed to this specification no selection of any particular modification of the invention is intended to the exclusion 8 of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

I claim 1. A dry rectifier comprisin a plurality of superposed layers, said plura ity of layers including two layers, one of said two layers being a layer of a metal compound and the other being a layer of metal, each succeeding layer of said two layers being deposited on the-preceding layer in vacuo from the vapor state.

2. A dry rectifier comprising a metal layer, a second metal layer of another metal and a layer consisting of a metal compound arranged between said" metal layers, said metal compound layer and said second met- :11 layer being deposited from the vapor state in vacuo.

10 layer of copper oxide arranged between said copper and manganese layers, the copper oxide layer being deposited on said copper layer and the manganese layer on said per oxide layer from the vapor state 1n l5 vacuo. 5. In-the method of producinga dry rectifier composed of a layer of a metal comof depositing pound and a layer of a metal the step of depositing said layer. of a metal compound from the vapor state in vacuoand the step said layer of metal from the vapor state m vacuo.

6. A dry rectifier comprising a copper metal layer, a layer. composed of another metali and a layer composed of a metal comarranged between said copper metal I oun lllyer and'sald layer com sed of another metal said layer com oseri poun being eposite on said copper layer and said layer composed of another metal on said layer composed of a metal compound from the vapor state in vacuo.

EMIL RUPP.

of a metal com-