US2372649A - Radio tube - Google Patents

Description

April 3,

A. BINNEWEG, JR

RADIO TUBE Filed July 50, 1942 Patented Apr. 3, 41945 UNITED STATES PATENT OFFICE RADIO TUBE Abraham Binnewex, Jr., Oakland, Calif. Application July 30, 1942, Serial No. 452,855 9 Claims. (Cl. Z50-27.5)

My invention relates to improvements in vacuum tubes for radio and the object of my improvement is to provide an electronic tube for general radio purposes of suitable plastic material. Further objects are to provide a tube wall cooled by circulating water, air, or other iluid thereagainst;

to provide simple quick means for assembling, taking apart, and element replacement; to provide means for sealing the tube and also to provide a method of assembly. Further objects will appear from the following drawing and description.

In the drawing, Figure I is a vertical section of the tube, and Figure II a top view with part of the cap removed.

The tube consists of a. base I oi' porcelain or oi polystyrene or other plastic material, provided with holes 2 for attachment to a radio chassis or base, a shell 3, fastened to the base I by bolts 4 and 5, and a cap 6 attached' or sealed to the top oi' the shell or case 3 by bolts 1. 'Ihe shell or case 3 is provided with a hollow space 8 within the shell wall for the circulation of cooling liquids or gases which may enter at the orliice through screw 9, circulate against the walls passing out through the hollow screw III. The outer wall could also be grooved i! no cooling chamber is used. The top. shell, and ybase need not be of the same plastic material.

Within the shell is a thin, metallic, hollow, cylindrical or square electronic plate II of ordinary construction, preferably open at both ends, and within this plate is a cylindrical or square grid consisting of a plurality of vertical wires I2 encircled by a wire helix I3, or by loops. Within this grid is a hollow cathode I4, and within the cathode a heater iilament I5.

Wires lead from the various elements for electrical connection: grid lead Il, plate lead I8, cathode lead Ii. and filament leads I9. These leads, one or more to each element, pass through plastic or metallic caps 20, and are cemented in place.

Through the shell cap S, pass two or more knurled or threaded tubes 2|, one use being for exhausting the shell. These are pinched together at the end and may be soldered or welded. These tubes could Optionally be formed as a part oi' the tube top 3. 'I'he second tube is provided to serve as a connection to an element, or for reexhausting the element chamber if the tube is opened to replace a part.

Grooves 22 are cast or cut in the inner wall of the shell. One purpose is to provide space and prevent radiorequency losses between plate II sa and the shell wall. Such grooves could 'be omitted for small tubes. Soft plastic gaskets 23 may be placed between shell 3 and base I, and also between the shell and cap 6 to afford an air tight seal. Ii no water chamber is needed, parts I and 3 could be formed in one piece.

Circular grooves 24 are provided in the bottom of the shell 3 for retaining the ends of plate, grid, similar grooves 25 are in the Extra grooves could be provided in between, of the same or of diierent depths for elements of diierent sizes. A threaded insert 26 serves to hold the `bolt 5. The bottom of the shell under insert 26 could also be gasketed. If the parts are carefully tted, no gaskets may benecessary.

By removing nuts 2l the cap 6 may be removed for the replacement of filaments or other parts. The parts of the shell, once proper ele ments are found, can be permanently cemented together.

The complete electronic tube is assembled by placing the plastic disk I flat and setting into the the desired cathode I4, the

the desired plate II.

cover 6 and the nuts caps 20 if used are then cemented at the sealed oriiices. One of the tubes 2I is plugged, and the can be cui; off and used again.

If exhaust; tube 2| is metallic, it may also be used as a grid lead making direct grid contact or by use of wire 28, connecting tube 2I and grid The second exhaust tube could likewise be machine screw 5 the shell 3 and the base I.

Having thus described the invention, what I claim is new is:

1. A vacuum tube comprising a cup-shaped dielectric receptacle, a removable dielectric cap for said receptacle, circular grooves in the bottom of said receptacle, circular grooves in said cap, cy-

lindrical cathode, grid and plate elements held in place by said grooves, and means for removably aiiixing said cap to said receptacle.

2. A vacuum tube comprising a cup-shaped nonconducting receptacle, a removable cap for said receptacle, conductive exhaust tubes perforating said cap, concentrically disposed cathode, grid, and plate elements within said receptacle, and electric conductors connecting said elements and said exhaust tubes.

3. The combination of a vacuum tube comprising a porcelain cup, a waterway in the walls of said cup, a removable cap for said cup, a. gasket between said cup and said cap, removable cathode, grid, and plate elements within said cup, a plurality of exhaust tubes penetrating said cap, electric conductors connecting said tubes and said elements, and a porcelain base fon the tube removably attached thereto.

4. A vacuum tube having ber, an axial cathode within said chamber, a conductor from said cathode passing through the top of said chamber, a grid surrounding said cathode, a plate surrounding said grid, a lateral aperture in said plate.- a conductor attached to said grid,

passing through said aperture and through the wall of said chamber, and a conductor attached to said plate and passing through the wall of said chamber.

5. A vacuum tube having an inner dielectric, cup-shaped chamber, insulated electrodes within said chamber, a removable dielectric cap for said chamber, 'an outer cylindrical chamber surrounding said'inner chamber and having walls integral at the top 'with the walls of said inner chamber, an annular opening equal in diameter with said outer chamber for said outer chamber at the bottom of the tube, and a removable closure for said outer chamber.

6. A radio tube comprising a cylindrical blocko 'tending upwardly nearly to of dielectric material, a central cylindrical chamber extending downward nearly to the bottom of said block, an outer annular cooling chamber exthe top of saidblock and having an annular opening of equal diameter therewith, a dielectric closure at the top for said inner chamber, and another closure at the bottom for said outer chamber, and concentrically arranged electrodes within said central chamber.

7. A vacuum tube comprising a cup-shaped dielectric receptacle, aremovable dielectric cap for siad receptacle, corrugations on the inner wall of said receptacle, a cylindrical anode adjacent said corrugations and supported thereby. a cylindrical grid enclosed by said anode and concentric therewith, a cylindrical cathode at the center of said receptacle, and concentric circular grooves in the bottom of said receptacle and also in the under surface of said cap for holding in spaced relation said anode, grid, and cathode.

8. A radio tube comprising a cylindrical plastic receptacle integrally closed at the bottom, a plastic cap for said receptacle, said .cap to be used also as leads, concentric circular grooves in the bottom of said receptacle, similar grooves in the under surface of said cap, electrodes supported in spaced relation by said grooves, and conductors, each connecting. one of said electrodes with one of said exhaust tubes.

9. A radio tube having a cylindrical receptacle, an axial electrode within said receptacle, concentric cylindrical electrodes surrounding said axial electrode, holes in said surrounding electrodes, lateral holes in said receptacle, and wire conductors attached to said electrodes, thence passing through the holes in said electrodes and said receptacle to the exterior.

ABRAHAM BINNEWEG, J a.

metal exhaust tubes in

Images