US1675585A - Electron-discharge apparatus - Google Patents

Description

July 3, 1928. I 1,675,585 w. c. WHITE ELECTRON DISCHARGE APPARATUS Filed June 5. 1922 Inventor WiHiam C.White,

His Atnoheg Patented July 3, 19 28.

-UNITED" STATES 1,675,585. PATENT I OFFICE.

WILLIAM 0. WHITE, 01' SOHENECTADY, NEW YORK, ASSIGNOB TO G IEFNEBAIIZ: ELECTRIC COMPANY,A CORPORATION OF NEW YORK.

' ELECTRON-DISCHARGE APPARATUS:

Application filed Tune 5,

- My present invention relates to electron discharge devices and means .for supporting such devices and supplying current thereto.

One of the objects of my invent on is to 5 provide asimple construction for electron discharge devices, particularly of the three- A electrode "type, and a mounting for such devices whic'hwill hold them securely m the "desired :operating position and serve W to provide electrical connections for supplyingv currentfor their operation.

In the operation of electron discharge devices of the type here involved, particularly for the amplification of high fre uency currents, difiiculty is expenenced ecause of the capacity which is present between the grid andanode electrodes. By reason of this capacity the efiiciencv 'of such devices for amplifying purposes when employed 1n the usual manner is greatly reduced. A further object of my invention is to provide a construction which will reduce to a minimum the capacity between these two ele ments; thereby permitting their operation at a higher efiiciency than has heretofore been possible;

It has been customary in the past to bring all of the leading-in conductors which supply current to the electrodes out' at .one end of the receptacle in which the electrodes are enclosed and-to provide a base for the receptacle consisting of a metal shell which encloses a disc of insulating material in which the contacts through which current is supplied to the device are mounted. .The

addition of this base to the device results inan appreciable increase in the capacit between 'anode and grid electrodes, whic is objectionable for the reasonabove set I 4? forth.

In carrying my invention into efiect I eliminate this objectionable feature in the present "form of the three-electrode electron discharge device. This is accomplished by extending v the leading-in conductors which supply current to the electrodes only a short distance outside of the tubeand arranging them in such a way that the ends of the leading-in conductors are adapted to make direct contact with contact members through which current may be supplied.

I also. bring the leading-in conductor which supplies current to the anode out of one end of the-tube and the leading-in conductors which supplies. our- 1922. Serial No. @024.

, enough to serve also as supports-for the tube and it will be possible to securely support the tubes from suitable contacts so positioned as to make contact with the leadingin conductors extending from the opposite ends of the tube.

The novel features which I believe to be characteristic of my invention are set forth in the appended claim, the invention itself however both as to its organization and method of operation will best be understood by reference to the following description taken in connection with the accompanying drawing in which Fig. 1 is a perspective view of an electron discharge device con structed in accordance with my invention and mounted in a suitable holder, and Fig.

' 2 is a plan view of the same with a portion.

of the holder cut away. As indicated in the drawing the electron discharge device comprises a tubular receptacle 1 containing a cylindrical anode 2 and grid and filament or cathode electrodes within this anode. The filament, which is not shown, is supported from its opposite ends by the supporting members 3 and 4. A

1 leading-in conductor 5 is connected to the supporting member 3 through a spring 6,

which provides the desired tension on the filament, and leading-in conductor 7 is connected to supporting member 4.- through a transverse arm 8. A leadin -in conductor 9 supplies current to the gri whichis not shown, but whichis sup orted on a rod. 10.

The anode 2 is supporte from its two ends by the arms 11 and 12. The arm ll'is attached to the transverse arm 8 but insulated therefrom byimeans of a head 13 of insulatin material and arm 12 is attached to a bridge 14 of insulating material through which the leading-in conductors 5, 7 and 9 pass.

By this construction it is possible to assemble the three electrodes of the device in their desired spaced relation before they are sealed into the tube. Current is supplied to the anode by means of a leading-in conductor 15, which is connected to the arm 11 through a flexible connection 16. The leading-in conductors 5, 7, 9 and 15 are made to extend only a short distance outside of the receptacle 1. In this way even though the leading-in conductors are comparatively flexible, the portion extending outside of the receptacle 1 will be sufiiciently rigid to securely support the device.

have shown in the drawing as a supportin means for the device described a base 1 having mounted thereon two flexible contact members 18 and 19 positioned just far enough apart so that when the receptacle l is placed between them the leading-in conductors 9 and 15 will make. contact with both of these s ring members. An upright support member 20, which is mounted on the basewl 'ii carries the two,

spring contact member-s21 and 22, which are preferably the 'same plane as contact 1 member 19, and these'oontact members 21 and 22 are arranged so as to make contact with the ends of the leading-in conductors 5 and 7 through which currentis supplied to the filament. The upright member- 20 is provided with an opening 23, which serves as a guide for the insertion of one end of the device into the holder; The guide member 24: is also provided'for convenience in guiding the opposite end of the device so that the leading-in conductor 15 will make contact with the contact member 18. The

contact members 18, 19, 20, 21 and 22 "are provided with suitable binding posts 25 for connecting the device in the circuit in which it is to be employed. V

While I have shown and described the preferred embodiment of my invention it Q will be apparent that my invention is by y no means limited to the particular embodh ment shown and described but that many" modifications in the .form and arrangement of the electrodes of the electron discharge device as well as in the manner in which the contact members are arranged, may be in conductors for. said cathode and grid electrodes extending from one end. of said device, a leading-m conductor for said anode extending from the opposite end of said device and a plurality of spring contact members extending into one plane adapted to make contact with the ends of the lea in in conductors for the grid and oath leading-in conductors, and a single contact member extending in a parallel plane and 4 th in theappended.

adapted to make contact with the endof the leading-in conductor for the anode.

Inv witness whereof, I have hereunto set my hand this second day of June, 1922.

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