Патент USA US2404899код для вставки
l July 30;'1946. " 1R, BEBES cATHoDE RAY ATUB@ ASSEMBLY Filed Apk-i1 s, 19.44l jig. 1. s 2,404,899 2,404,899 Patented July 30, 1946l UNITED STATES PATENT OFFICE 2,404,899 CATHODE-RAY TUBEI ASSEMBLY John R. Beers, Briarcliiï Manor, N. Y., assignor to North American Philips Company, Inc., Dobbs Ferry, N. Y. Application April 3, 1944, Serial No` 529,350 5 Claims. (Cl. Z50-162) This invention relates to cathode ray tubes, and more particularly to the assembly of certain elements thereof. It is an object of the present invention to simplify the assembly of elements of a cathode ray tube. ' f 2 dividually and collectively, such as a second anode and two sets of deflecting plates. Preferably, this sleeve is cylindrical and slides over the top part of a cylindrical first anode whereaiter the second, `likewise cylindrical anode having the same outer diameter as the iirst anode, is inserted in the sleeve to rest in spaced relation to the iirst anode, openings such as transverse slots being provided It is another object of this invention to pro vide an assembly of the type aforesaid wherein in the sleeve for the purpose of welding supply elements are aligned automatically. to the anode. Afurther object of the invention is to im 10 conductors Two sets of longitudinal slots are arranged at prove the accuracy and stability of the align right angles to each other in the top part of the ment of elements of a cathode ray tube. sleeve to accommodate and to ñx in position both Another object of the invention is to render relative to each other and to the anode, two sets the assembly of elements of a cathode ray tube of de?lecting plates which project from the sleeve 1 more economical. . suiiiciently to have supply conductors welded to which the Other objects, and the manner in their projecting portions. In this manner, the same are attained, Will be apparent from the precise and lasting alignment of all elements, in following description. ' dividually and collectively, is insured to an extent Cathode ray tubes usually comprise an electron not heretofore obtained, at a material saving in gun, as a source of a well-defined, focussed beam 20 time and labor. of electrons or cathode rays, and deñecting In' the drawing accompanying the present means, most commonly in the form of deflecting speciñcation and forming part thereof, one em plates, for controlling or shifting such beam in bodiment of my invention is shown diagrammati dependency upon applied voltages. The electron cally by way of example. gun usually includes, apart from a cathode and 25 In the drawing, a grid arranged in front thereof, a number of Figure l shows somewhat diagrammatically a anodes, for example two, which serve as electron longitudinal section of an electron gun-deflecting optical lenses for the system and therefore are plate assembly of a cathode ray tube according instrumental in determining the path of the un 30 to the invention. deflected electron beam, and the deñecting means Fig. 2 is a transverse section taken along line usually include two pairs of deñecting plates one 2--2 of Fig.l l; while arranged in front of and at right angles to the Fig. 3 is a perspective view of a supporting other, these sets of deñeeting plates being in sleeve according to the invention. strumental in determining the path of the de: Referring now to the drawing, l denotes the 35 ñected electron beam. Evidently, the accurate and stable alignment of the two or several anodes relative to each other, of the two or several sets cathode and 2 the grid of an electron gun as sembly forming part of a cathode ray tube. A sleeve 3 mounted on the grid assembly supports of deiiecting plates relative to each other, and insulating, e. g. ceramic members 4 which, in finally, of the anodes relative to the deflecting turn, support a sleeve 5 mounting the first anode 40 plates is among the most important requirements 6. This anode is cylindrical and includes a num in cathode ray tube manufacture; yet, prior to the ber of disc-shaped insets 1 which have apertures present invention, this alignment invariably con 8 for focusing purposes. stituted a rather serious, time-consuming and un A ceramic sleeve 9, likewise cylindrical and economical operation, moreover yielding results 45 having an inner diameter hardly larger than the that left much to be desired. outer diameter of the iirst anode 6, is slid over The present invention contemplates simplify this anode to be firmly supported thereon, e. g. by ing and at the same time, improving the assembly resting on sleeve 5, and to be in perfect align of elements of a cathode ray tube and specifically, ment with the anode 6. The sleeve 9 may be insuring the accurate and stable alignment there made of Steatite, Isolantite or other suitable re 50 of, by providing, in place of the complex rod or fractory material. Two transverse slots l0 are similar supporting structure of the prior art, a provided on opposite sides of the bottom part of unitary supporting member, preferably a ceramic sleeve 9. A supply conductor Il welded to the sleeve, mounted, for example, on the first anode anode 6 passes through one of the slots I0 while and mounting in turn, in prearranged spatial a lock tab l2 welded to the anode 6, rests in the relationship, the other elements to be aligned in 2,404,899 3 other slot- I0 to assistin preventing displacement ' ' ¿il Í; Í j ~ 4 , of’slots in said hollow-insulatingmemben and deílecting.v plates _extending >through. and mounted in'proper alignment by said slots. n of anode 6 relative to sleeve 9, .A second anode I3 of the same cylindrical con figuration and the same outside diameter as the 2. In a cathode ray tube, in combination, a . ñrst anode, and provided with disc-shaped insets I4 having apertures I5, is inserted in sleeve 9 cathode and grid assembly, insulating means abovethe first anode so as to be positioned in the center portion of sleeve 9, >Two transverse mounted on said assembly, a ñrst focussing means mounted on said insulating means, a hollow and welded to the second anodeV I3, while a lock tab I8 welded to the anode I3 rests >in the other slot I IJ to assist _in preventing displacement of sets of slots in said> hollow insulating member. one set arranged above and at right angles to the other, and’two pairs of dei‘lecting plates eX insulating member mounted on _said nrst fo slots It are provided on opposite sides of the cussing means, a second vfocussing means mount center portion of thesleeve and a supply con ductor i7 is passed through one of the slots I 6 ,10, ed inside said hollow insulating member, two anode I 3 relative to sleeve 9. 15 The bottom and center sections of sleeve 9 are tendingthrough and mounted in proper align ment by said slots' ground to accommodate the cylindrical `anodes 6 and I3 while the top section of sleeve 9 is not ground, a step I9 being thus provided between cathode and grid assembly, insulating means the ground and unground sections which serves4 as an abutment or stop for the second anode I3. The top portion of sleeve 9 comprises a set of longitudinal slots 2i! arranged above the second anode I3 and accommodating a pair of deñecting ‘3. `Ina cathode ray tube, in combination, a mounted 0n said assembly, a first focussing means mounted on said insulating means, a hollow insu lating member mounted on said ñrst focussing means, a second'focussing means mounted inside said hollow insulating member,- at least one pair of slots in said hollow insulating/member, deílect ing plates extending through andmounted in plates 2I, and another set `of similar'slots‘22 ar ranged above the slots Zû and at right angles 25 proper alignment by said slots, and means sur rounding said hollow insulating member andhavl thereto; and accommodating deilecting plates 23. g The slots ‘Ziîandjzlsserve to; properlyposition.` the ingslotswhereby tov engage 'saidde?lecting plates. . platestwhi'chrnayfbe fastened .in-thel slots in'any Inaca'thode ray tube, `,in combination,l a , _cathode’and-grid assembly, insulating means vfïn; `an preferred embodiment of' the> invention, 30 mounted on said assemblmïa ñrst'focussing means mounted on said insulating means,> a hollow in, two mica discs 24 Vhaving’accurately punched slots vconventional manner. ` ` ’ sulating member moun’tedfon said first focussing 25 to vrigidly hold the ’plates are slipped »over the means, asecond focussing means mounted inside top of the sleeve T9 and anchoredin position to assist in' " the proper alignr’nentv and spacing of of said slots ,plates hollow in said extending' V'insulating hollow insulating. throughmember,A a-nd'niountedvin membendeilect-L atleast one- pair ’ theiplates. : Matching eyelets 26fin the mica 4discs 35 " ing 2e permit, them'A to -berigi'dly «fastened to `each proper alignment'byl said slots, and an'annular other,` at the desired spacing, with upright nickel rods or `wiresA 21 which', apart l»from acting ' as insulating means having corresponding slots slid > over lsaid‘hollow insulating 'meinberto hold said connectors', also serveas conductorsinpthe weld-` ' 5 , ., i ing to the stem leads (not shownî in the draws 40 deiiecting plates in place. ing).v Metal or mica snubbersv (not shown) based on the mica discs may be provided to supportthe assembly in the bulb neck of the cathode ray tube. I> wish it to be understood that I donot desire to be limited to the exact details of construction and design shown ’and described, as'various modi ñcatìons within the scope ofthe appended claims may suggest themselvesto a person skilled in the art. Iolaim: ` ‘ ‘ ` ' ' ' ' ~ l. In a cathode ray tube, in combination, a Cathode and grid assembly, insulating means mounted on said assembly, a first focussing means ^ 5; In a cathode ray tube,- in*- combination, î`a cathode and. grid assembly, insulating .means mounted on said assembly, a ñrst focussing means mounted onsaid insulating means, a hollow insu' lating member-mounted on- said ii'rstïfocussing means, a second focussing means mounted‘inside said hollow insulating member, two -sets of slots in said> hollow insulating member one set var ranged above‘and at right angles to the other, 50 two pairsv of deilecting plates extending through and mounted in proper alignment by saidslots, two annular insulating means having slots where. by to engage and hold in place said deilecting plates, mounted on said ‘hollow insulating mem-. mounted on said insulating means, a hollow in sulating member mounted on said iirst focussing 55 ber, and means connecting and spacing said an, nular insulating means; ' means, a second focussing means mounted inside said'hollow insulating member, at least one pair « . Y JOHN R. BEERS.