US2222669A

US2222669A - Electrode structure

Info

Publication number: US2222669A
Application number: US303561A
Authority: US
Inventors: Kurtz Jacob
Original assignee: EISLER ELECTRIC CORP
Current assignee: EISLER ELECTRIC Corp
Priority date: 1939-11-09
Filing date: 1939-11-09
Publication date: 1940-11-26
Anticipated expiration: 1957-11-26

Description

Nov. 26, 1940. J. KURTZ 2,222,669

ELECTRODE STRUCTURE Filed Nov. 9, 1959 14 3 I a 1! 15 vi15 INVENTOR JZzoofifiizrZz ATTORNEY Patented Nov. 26, 1940 PATENT OFFICE .222.069 ammonia srnucruaa I JaoobKurtn'leanechN.J.,amignortoEisler Electric Oorporaflon, Union City, N. 1., a corporation of Delaware Application November 9, i939, No. 303,561

4 Claims. (01- 176-126) This invention relates to new and useful improvements in electrode structures for electrical discharge devices.

The object o! the invention is. an electrode assembly which may be mounted in an envelope without any special centering or spacing devices other than wires serving as leading-in conductors.

With this object in view, three embodiments will be described for the-purpose of exemplifying m the invention.

In the drawing Fig. 1 is aside elevation of a discharge tube of a conventional type in which the electrode structures of the present invention may be mounted;

it and Figs. 2, 3 and 4 are perspective views of three embodiments of the present invention.

Referring to Fig. 1, I is a glass envelope enclosing electrodes 2 and '2'. The electrodes are metal go cylinders closed at the bottom where lead-in wires such as 3 and 4 are welded thereto.

Wires

3 and 4 are either of the same kind of metal as the electrodes or of one which maybe readily welded thereto and are sealable into the wall of the glass as envelope as indicated at 5. The bottom of the electrode should be as close as possible to the "press 5. By virtue of the construction to be presently described, the

conductors

3 and 4 serve not only as lead-in wires but also as the sole supports for the electrode and the sole means for properly positioning it, e. g., with respect to the envelope I. I

As shown in Fig. 2. the lead-in

conductors

3 and 4 are constituted by a single wire bent into a 35 U the connecting portion of which is flattened as shown at 6. The closed bottom of the electrode is welded to the flattened portion at two points 1.

This will insure a firm support for the electrode in axial alignment with the

legs

3 and 4 of the U.

Q When

legs

3 and 4 are sealed at 5 into the envelope, the electrode 2 will be centered within the glass tube l and it will not be necessary to provide special centering means or protectors to prevent contact between the electrode and the 45 glass envelope. This is insured by the securing of the electrodeto a flat instead of a rounded surface and by the provision of a plurality of leading-in wires for each electrode.

Current supply may be eflected through either 50

leg

3 or 4.

The embodiment shownin Fi 3 is like the one in Fig. 2. However, in order to insure the stability of the electrode assembly against distortion transversely to the plane in which the lead- 55 ing-in wires lie, corrugations Ill and I II are formed in

legs

3 and 3 oi the U. These corrugations point in opposite directions at right angles to theplanethroughland 3. i

In the'structure shown in Fig. 4 the arrangement of Fig. 3 is substantially duplicatedat I4, 5 i5, I, ll, corresponding to 3, 8, II, II. However.

. legs l4 and I! are connected with leading-in wires l2, l3. Legs l4 and II or I! and 13, or both,may be sealed in the walls of the glass envelope. This arrangement is particularly useful in lamps re-' quiring copper-clad leading-in wire or the like which is not rigid enough to serve as the sole electrode support or which can not be readily welded to the electrode. i2 and I3 are such leading-in wires. Through two or three steps welds, l8 and is, these leading-in wires may be secured to nickel, nickel alloy or the like wires l4,

I! which possess the necessary characteristics for acting as the sole electrode support.

What is claimed 18! 2 1. In an electrode structure for electric 'discharge device having an envelope, 9. metal cylinder, a U shaped wire the connecting piece of which is secured to the cylinder and the two less of which pass through and are sealed into the wall of the envelope, and a corrugation formed in each leg between the seal and the connecting piece pointing in opposite directions at right angles to a plane passing through the legs.

2. In an electrode structure Ior electric discharge device having an envelope, 9. metal cylinder, a U shaped wire the connecting piece of which is flattened and fastened to the cylinder and the two legs of which pass through and are sealed into the wall of the envelope, and a corrugation formed in each leg between the seal and the connecting piece pointing in opposite directions at right angles to a plane passing through the legs.

3. In an electrode structure for electric disv charge device having a glass tube envelope, a metal cylinder closed at one and open at the opposite end, a support for said cylinder consisting solely of a U shaped wire of a metal that may be readily welded thereto, the connecting piece of the U being flattened and welded at a plurality of points to the closed end of the cylinder, the two legs of the U passing through and sealed into the 7 wall of the glass tube, and a corrugation formed in each leg between the seal and the connecting go piece pointing in opposite directions at right angles to a plane passing through the legs.

4. In an electrode structure for anelectric discharge device having a glass tube envelope, a metal cylinder closed at one and open at the I opposite end, a' support for said cylinder consisting solely or a. U shaped wire of a metal that may be readily welded thereto, the connecting piece of the U being flattened and welded at a plurality of points to the closed end 01' the cylinder, and the two legs of the U passing through and sealed into the wall 01' the glass tube, a. corrugation ionned'in each leg between the seal and the connecting piece pointing in opposite directions at right angles to a plane passing through the legs, leading-in wires of a. diflerent material, and multi-ltep welds connecting the legs of the U with the leading-in wires.

JACOB KURTZ.