Патент USA US2113005код для вставки
Ap ' 5, 1938. 2,113,005 _ N. R. SMITH MOUNT Eon ELECTRON DISCHARGE DEVICES Fiied July 31, 1936 INVENTOR NEWELL R. SMITH '&4M»W TTORNEY Patented Apr. s, 1938 2,113,005 UNITED STATES PATENT OFFICE 2,113,005 MOUNT FOR ELECTRON DISCHARGE ‘ DEVICES Newell R. Smith, Bloomfield, N. J., assignor, by mesne assignments, to Radio Corporation of America, a corporation of Delaware Application July 31, 1936, Serial No. 93,534 7 Claims. (o1. cam-27.5) My invention relates to mounts for electron shield from the lower ends of the electrode side discharge devices, particularly to multi-purpose' rods of the upper section. A rectangular in devices employing two or more independent elec sulating plate or spacer 22 bears snugly in the trode assemblies in one envelope. 5 The conventional multi-unit radio tube com prises one self contained electrode assembly, or section, usually of the unit mount type of con— struction, supported upon the upper end of longi— tudinal' support rods rising from the stem and 10 with another electrode assembly or section at the lower end of the envelope supported directly on the stem. The electrodes ‘and shields of the lower section which usually are individually supported upon lead-in wires extending through the press 1 5 are di?icult to assemble and to maintain in ?xed spaced relation. ' According to my invention the elements of the lower section, which may for convenience be referred to as a double diode, is constructed as _,0 a unitary assembly of electrodes and shielding " means. A box-like shield receives the electrodes and insulating spacers and is adapted to be easily ' and economically assembled in the mount. My invention is de?ned with particularity in the appended claims, but one embodiment thereof is described in detail in the following speci?ca tion and accompanying drawing in which: ‘ Figure 1 is a front elevation, partially in sec tion, of an electron discharge device embodying 30 my invention, and Figure 2 is an exploded perspective View, partly in section, of a double diode assembly embodying 35 40 ' .15 5;) 55 upper portion of the shield against recessed por tion 2| and insulating plate or spacer 23, slightly longer in one dimension than the shield, is at tached 'to the lower edge thereof by ear ‘exten sions 24 from the box. In the bottom of recess 2| and in lower spacer 23,are registering openings 25 and 26 to receive the lower end of the cathode 10 with emitting surface l0. 'I'wo coaxial tubular anodes 21 and 28 are each positioned concentric with emitting surface l0 and held upon two pairs of support rods 29 and 30 between the insulating spacers. For convenient attachment to the sup- 15 port rods the anodes may have integral exten sions 3| and 32, notched to provide offset por tions so the extensions of one anode may if de sired lie in one plane and at an angle to the plane of the other anode extensions and be at- 20 tached to diagonally opposite support rods. To longitudinally space the two coaxial anodes, each extension may conveniently be of a width at its end adjacent the support rods slightly greater than the total length of the two coaxial anodes. 25 Each anode is thus securely held in place upon two opposed support rods which are held in ?xed spaced relation to the cathode and to the sides of the box shield. Each anode is connected through one of its support rods to a lead-in wire of the 30 header. This assembly of anodes is not only rugged in construction but is easily manufactured my invention. ' and assembled with the upper section -of the The mount assembly shown in Figure 1, which . mount. In assembling the mount, the shield is particularly adapted for a metal envelope, containing the diode anodes and their insulating 35 comprises a stem or metal header I with electrode spacers, is attached to support rods 9 near the ' lead-in wires 2 sealed gas tight in glass beads in stem, preferably by welding opposite faces or eyelets 3. The upper electrode assembly com extensions from the faces of the shield to the prises insulating spacers ! and 5 which support rods, and the upper assembly of electrodes is between them the cooperating cathode 6, grid 1 then added by threading rods 9 through holes in 40 and anode 8, and which are mounted upon sup~ insulating spacers 4 and 5 and inserting cathode 6 port rods 9 joined‘ at their lower ends to the the proper distance to bring emitting surface I0 header. In this tube the cathode of the indirectly in registry with the diode anodes, the lower heated type extends below lower spacer 5 and is spacer 5 coming into fiat engagement with the coated at ID with electron emitting material for upper face of the shield. In addition to rugged- 45 supplying space current to an assembly of elec ness-and simplicity of manufacture the electrode trodes constructed and supported in accordance assemblies constructed in accordance with my with my invention. invention are e?’ectively shielded electrostatically, An assembly of diode plates adapted to cooper— and electronically to reduce interaction between ate with electron emitting surface l0 and better the two sections of the mount. 50 shown in the exploded view of Figure 2 comprises Since many modi?cations may be made in an a box-like shield 20 which may as desired be electrode assembly constructed according to my either open or closed on its sides is preferably invention without departing from the scope there of nickel, and has an indented or recessed por of, it is desired that my invention be limited only tion 2|, which serves to space the top of the by the prior art and by the appended claims. 55 2 2,118,005 I claim: spacers attached to said support rods, a cathode 1. In combination in an electron discharge de extending between said spacers and below the vice, an envelope. a stem closing one end of said envelope, parallel support rods attached to and projecting from said stem into said envelope, a box-like shield with opposite ends secured to said rods and having an opening in the top, an elec trode assembly resting on the top of said shield and secured to said rods, said assembly having a cathode with its lower end pro] ecting through said opening into said shield, and a tubular anode in said shield concentric with the lower end of said cathode, said anode having radial extensions, said extensions being insulatingly secured to the top and bottom of said box. 2. An electron discharge device comprising a‘ stem, two support rods projecting from the stem, 9. box-like shield secured to said support rods near the stem and having an opening in its top, an electrode assembly mounted on said support rods and comprising a spacer resting on the top of said shield, and a cathode with an electron emitting surface projecting into said box through said opening, spaced insulating discs held in said 25 shield, a tubular anode in said shield concentric with said emitting surface of the cathode, and means for securing said anode to said insulating discs. 3. An electron discharge device comprising in combination a stem, parallel support rods pro 30 ‘ jecting from the stem,'a rectangular sheet metal box with its ends secured to said support rods and having an opening in the top, an electrode assembly attached to said support rods and rest lower spacer, a rectangular box-like shield at tached at opposite ends to said support rods and bearing at its upper side against said lower spacer, two insulating discs in said shield transverse to said rods, two anodes surrounding the lower end of said cathode and secured in spaced relation to said insulating discs. 5. An electrode assembly comprising a metal 10 box-like shield, two insulating spacers at oppo site sides of said shield, a cathode between said spacers, two tubular coaxial anodes surround ing the cathode between the spacers and each having two radial extensions, each extension be ing as wide at the ends as the distance be tween said spacers, and means for securing said extensions to said spacers, the'plane oi‘ the ex tensions of one anode being at an angle to the plane of the extensions of the other anode. _6. In combination in an electron discharge device, a rectangular metal box, two insulating plates secured to opposite sides of said box, reg istering openings in said plates and the sides oi’ said box, a cathode extending between and titted in said openings, two coaxial anodes held in spaced concentric relation around said cathode between said plates, and two pairs of side rods, each rod being parallel to said cathode and en gaging said plates at its ends and spaced around 30 said openings, each anode being secured to al terhate rods. 7. In an electron discharge device having in combination a rectangular metal box, two insu ing on the platform formed by the top of said lating plates secured to opposite sides of said .box, box and comprising a cathode with and an emit registering openings in said plates and the sides of said box, a cathode ?tted in said openings, two coaxial anodes held in spaced concentric re lation around said cathode between said plates, and two'pairs of fastening means for securing each anode to said plates at spaced points around said openings, each anode being secured to al ting surface projecting into said box ‘through said opening, an anode in said box concentric with said electron emitting surface of the oath 40 ode, said anode having extensions insulatingly secured to the walls of said box. 4. A_multi-unit mount for electron discharge devices comprising a stem and two upstanding support rods, two transversely spaced electrode ternate fastening means. _ NEWELL R. SMITH.