US1879321A

US1879321A - Thermionic tube

Info

Publication number: US1879321A
Application number: US505766A
Authority: US
Inventors: Knabner Albert; Richter Johann
Original assignee: Telefunken AG
Current assignee: Telefunken AG
Priority date: 1930-01-07
Filing date: 1930-12-31
Publication date: 1932-09-27
Anticipated expiration: 1949-09-27
Also published as: DE561435C; GB366238A; NL32184C; BE373147A

Description

Sept 27, 1932. A, KNA'BNER ET AL 1,879,321

IHERMIONIC TUBE Filed. Dec. 51, 1950 INVENIORS A KNABNER BY *1? m rdmaiav Patented Sept. 27, 1932 UNITED STATES t PATENT oFFICEY. 1

ALBERT xneinvnn AND JoHAnN mcnrnn, or nnnnm, GER-MANY. ASSIGNORS mo TELEFUNKEN GESELLSCHAFT FUR DRAH'ILOSE TELEGRAPHIE M. 13.11., or BERLIN,

GERMANY, A CORPORATION OF GERMANY' THERMIONIC TUBE Application filed December 31, 1930, Serial No. 505,766, and in Germany January 6, 19 30.

Thermionic tubes have been disclosed in the prior art in which .the electrode supply leads are brought through-what is known as a squash at one end of the vacuous vessel. Thermionic tubes of this kind offer the advantage that they are easily manufactured.

The present invention discloses a method of providing tubes of this sort with sockets or holders. According to the invention, the mechanical securing of tubes upon the holder is insured by the aid of traction of the tubes against the holder produced by wires enclosed within the squash without cementing. These fused-in or sealed-in wires whereby the tubes are pulled against the base of the socket may be provided separately (dummy wires) or else may constitute the current-supply leads for the tubes. Since the wires confined in the squash are mostly lying in one plane, it is suitable to dispose the squash planar on the surface where it comes to lie against the tube holder, or, if desired, to provide it with a flange as shown in Figs. 1 and 2.

Referring to the attached drawing, S denotes the plus, I denotes insulating material in which the said pins are secured and supported.

It is moreover advantageous to provide a guide bar F or the like on the tube holder adapted to prevent tilting of the tube in relation to the holder. The construction of such guiding element turns out to be particularly simple if the tubular pins provided on the tube holder, and with which the sealedin wires are united by soldering, clamping, or the like resulting in a condition of tension, are split at the end turned towards the squash so that they result in claws (Fig. 3.). These claws may be bent around a flange provided on the squash and serve for aflordin mech anical supporting for the tube. uch tube holders, which are especially well suited for the supporting of externally controlled tubes having an oval or flat cross-sectional shape are most suitably made dissymmetric in such a way that the proper introduction of the holders into the corresponding sockets will be assured from the outset. Ifdesired, a suplementary pin may be provided, said in eing disposed dissymmetrically with re erence to the others, and serving, forinstance, for the connection of the control electrode;

trodes and having at one end an outwardly projecting press, a base comprising an insulating member fitted to said press and having contact pins connected to said electrodes, and wires sealed into said press to project outwardly with their outer ends secured to said member to produce tension in said wires, whereby said member is held in position on said press solely by said wires.

2. An electrical discharge tube compris-f ing a tubular glass envelope enclosing electrodes and having at one end an outwardly projecting press, a base comprising an insulating member shaped to fit snugly against the end of said press and provided with contact pins, and leading-in wires sealed into and extending thru said press with their inner ends connected to said electrodes, and their outer ends to said contact pins to place the outer portions of said wires under sufficient tension to hold said base in place on said press.

3. An electrical discharge tube comprising a tubular lass envelope enclosing electrodes and closed at one end by a press having an outwardly projecting flattened end, wires sealed into said press'to project outwardly from said flattened end and connected inside said enevolpe to said electrodes, and a base comprising an insulating member with a flat portion adjoining the end of said press and contact pins fixed in said member, the projecting ends of said wires being secured to said contact pins toput said wires under tension and thereby hold said base in position on said press solely by said wires.

4. An electrical discharge tube comprising a tubular glass envelope enclosing electrodes and having at one end an outwardly projecting press with a flanged outer end, leading-in wires sealed into said press to project from said end, and a base comprising an insulating member having contact pins and a clamp to engage said flanged end of V said press, said pins being secured to said leading-in wires to put them under sufficient tension to hold said base inposition.

5. An electrical discharge tube comprising a tubular glass enevolpe enclosing electrodes and having at one end an outwardly projecting press with a flanged outer end, a base comprising an insulating member and a tubular contact pin fixed in said member, ;the inner end of said contact pin being split to form a claw for engaging the flanged outer end of the press, and a wire sealed into said press to project outwardly with its outer end secured to said pin.

ALBERT KNABNEZR.

J OHANN RICHTER.