US2055093A - Translating device - Google Patents

Description

R. M. WISE TRANSLATING DEVICE Sept. 22, 1936.

Filed July 15, 1932 Patented Sept. 22, 1936 UNITED STATES PATE T OFFICE TRANSLATING D v oE- Roger M. Wise, Emporium, Pa.i, assignor to Hygrade Sylvania Corporation, Salem, Mass, a

corporation of Massachusetts 7 Application July 15, 1932, sesame. 622,754

g 17 Claims. (cu ate-+1215 embodied in the construction of a translating device or radio tube that cooperates to eliminate the electro-static coupling between the electrodes of the tube and parts adjacent thereto, theinvention being particularly adapted and directedtoward reducing and substantially eliminating the capacity coupling between-the grid and the plate that would otherwise occur, such as the capacity coupling between the plate and the terminal for the grid that is now applied on the end of some tubes opposite to, the base. i

The invention further comprehends a shield construction for use in tubes of the various well known forms, that includes the provision of a member adapted for contraction and expansion to facilitate the insertion of the shield into a tube for assembly purposes, the shield being adapted-for normal expansion so as to extend v transversely throughout the portion of the tube of larger diameter. In this way, this shield will extend throughout the glass envelope enclosing the electrodes, in the portion oflarger diameter, so that when the tube isused-in a radio set with an enclosing tubular shield of well known form or the equivalent thereof, there willonly be a very small gap between the marginal portion of the shield provided by this invention and the tubular shield enclosing the tube or translating device.

As a result, the tubular shield will cooperate with the shield provided by this invention to substantially eliminate electro-static coupling between the electrodes of the translating device and adjacent parts of the radiantenergy translating apparatus. The invention also comprehends the provision of a special shield construction and mounting therefor.

-In the drawing: i Fig. 1 is a perspective view'of a translating device or radio tube constructed in accordance with this invention. or v Fig. 2 illustrates the translating'device incorporating the present invention and shown inside elevation in applied position with adjacent portions of radiant energyreoeiving apparatus. 1

Fig. '3 shows a vertical cross section through the translating device on a substantially enlarged scale to illustrate the details of the in- 'vention in its assembled position. i

r Fig. 4 shows how the electrodes are mounted on the stem with the shield in contracted position for passage through the restricted opening in thebulb during assembly. Fig. 5 is a disassembled perspective of the parts 5 for supporting and attaching the shield construction to the supporting wires of a translating device or radiotube, and the spacing disc for the upper endsof the supporting wires.

" The invention is disclosed as applied to one 10 form of construction for radio tubes or translating devices, in which the device includes the envelope lof a common form having an enlarged roundedend 2 and a contracted or small end 3 attached to the base member 4 provided with a 15 plurality of contact members 5 for detachable engagement in a well known manner with other par'tsofa radio'set. The envelope I usually constructed of transparent glass, is provided with the usual stem 6 assembled in the envelope'in the well known manner. This stem carries a plurality of supporting wires that have lead-in wires connectedthereto and extending through the stem for connection with the terminal wires in a manner well knownin the art. 2

The supporting wires carried by the stem 6 support the electrodes for the tube, and the tube illustrated isoi the pe'ntode type having a 'pair of supporting wires 1 for the cylindrical anode orplatet, a pair of supporting wires 9 for the 30 suppressor grid Ill and the shield ll forming the principal features of the present invention.

The suppressor grid is mounted within the anode as illustrated-and within the suppressor grid are additional supporting wires 12 for the 35 screen grid l3,the control grid I 4, and the oathode I5, each mounted one within the other and.

within the suppressor grid in a well known manner. p

The free ends of the supporting wires 9 are con- 40 nected to and support a ring member l6 by means of the tongues ll formed from the ring and extended laterally thereto and suitably attached by welding or the-like to supporting wires 9. The supporting ring I6 is provided with a laterally 45 extending flange l8 normally extending toward the stem ofthe-device in assembled relation. This flange I8 encloses a mica or other insulating disc l9 that is provided with a series of openings to receive, retainand space supporting wires l2 relative to'each other to properly support the electrodes carried thereby in proper spaced relation tosecure the normal operation of these electrodes in cooperation with each other.

eThe shield I I is formed of apiece of resilient 55 flexible sheet metal and has a central opening 20 and a ring section 2| while a plurality of wing members 22 are formed by radially cutting the piece of sheet material outwardly from the ring section 2|. These wing members are twisted slight-1y out of the plane of the ring section 21 in order that their edges will be adapted to overlap one another when they are flexed laterally relative to ring section 2|. The purpose of flexing these wing sections laterally is in order to provide for the permanent attachment of ring section 2| to supporting ring IS in the construction of the tube so that this shield is mounted in fixed .posi-- tion with the electrodes in the construction of the tube in the usual manner, and when all of the electrodes and supporting wires carried by the stem with this shield placed in position as illustrated, it may then be inserted in the envelope I.

through the ability of the resiliently supported wing members being adapted to flex and pass through the opening in the contracted end 3 of the envelopeas shown in Fig.4.

After the stem and the parts carried thereby are inserted into the envelope in the assembly of the tube in the usual manner, the resiliency of the sheet material from which the wing members are formed will cause them to return to their normal position to extend substantially radially from the ring section 2! so that the projections or lips 23 on the outer edge portions will engage the inner wall of the envelope l at the portion of larger diameter or size, as clearly illustrated by the drawing and 'which' position it will maintain throughout the normal operation of' the translating device.

The control gridis usually connected with a terminal cap 24 on the large end 2 of theenvelope in tubes of certain types in order to facilitate the connection of the control grid with other parts of radio apparatus so as to eliminate capacity coupling between the cap and other connections and parts of the tube. This is to reduce the tendency of the tubes to oscillate due to this capacity coupling between the control grid and the anode. To further reduce the electro-static coupling between the electrodes in the tubes and other parts of the radio apparatus, the tubes are usually shielded by enclosing them in a tubular shield 25 as shown in Fig. 2. The shield in the assembled relation of the tube in radio receiving apparatus as illustrated 'in Fig. 2 will effectively cooperate with the shield 25 to substantially eliminate electro-static coupling between the electrodes of the tube and adjacent parts of the radio apparatus. The shield will particularly reduce or eliminate its connection through the'terminal 24 with the anode.

The supporting ring to which the shield is secured provides a particularly convenient support for the shield as well as for the mica spacing discl9 so as to hold all of the electrodes of the tubesv inproper spaced relation and provide for their assembly in a simple, efficient and economical manner.

The getter in the tube as shown in the drawing may. preferably be mounted on the underside of shield II by securing it in the usual manner to some of the wings 22. Upon the normal reaction of the getter in the tube it will thenbe deposited on the inner wall of the envelope I so as to substantially completely cover the inner wall below shield II as shown at 26 in Fig. 3. The lips 23. on the shield will contact with the deposited get-; ter 12% and by reason of its connection witha grounded or other desired circuit in the radio set will cooperate to substantially completely shield the electrodes in the envelope from electro-static coupling with adjacent parts, and parts and circuits externally thereof. In this way it has been reduce electro-static coupling with the tube ele- 'ments, and thereby further reduce or eliminate the necessity for external shielding.

The invention claimed is:

1. In a radiant energy translating apparatus wherein an electron emitting device isrmounted on said apparatus, and said device comprises an envelope of, non-uniform diameter provided with a base at one end having means for connecting the device to said apparatus, having a terminal member on the opposite end,,an electron emitting and controlling elements within the envelope, and a shield disposed upon the inner side walls of the envelope, the combination of a flexible sheet metal member carried by said device between said terminal and saidelectron emitting and controlling elements and extending in substantial radial relation to said tubular shield and having its marginal portions flexibly engaging and in conductive connection with said tubular shield for cooperation to substantitally eliminate electro-static coupling between the elements of said device.

2. In a radiant energy translating apparatus wherein an electron emitting device is mounted on said apparatus and has a surrounding shield, and said device comprises an envelope provided with a base at one end having means; for connecting the device to said apparatus, having a terminal member on the opposite end. and electron emitting and controlling elements within the envelope, the combination of a shield member formed of sheet material and having a plurality of wing members thereon relatively movable to each other, said shield member being mounted in said envelope between said elements and said jacent relation to said tubular shield for cooperation to substantially reduce electro-static coupling between the elements of said device.

3. A translating device comprising an envelope of non-uniform diameter having means supporting a plurality of electrodes therein, a terminal onthe other end of said envelope, and a shield disposed transversely in said envelope between said electrodes and said terminal, said shield being formed of a plurality of radially extending sectors of flexible sheet material with adjacent sectors in contact and adapted to flexibly engage said envelope and to substantially eliminate electro-static coupling. between said electrodes.

4. A translating device comprising an envelope,

means supporting a plurality of electrodes in the central portion of said envelope, a, terminal on the other end of said envelope electrically connected to one ofsaid electrodes, and a shield in said envelope. formed of resilient flexible sheet material formed. to. provide a pluralityofwing members having adjacent overlapping edge portions, said wing members being relatively mov-v able to facilitate assembly in said envelope and extending transversely of said envelope through! out a portion of maximum transverse dimension for substantially eliminating electro-static coupling between said terminal and certain of said electrodes.

5. A translating device comprising an envelope provided with a plurality of supporting wires carrying a plurality of electrodes in the central portion of said envelope, a terminal on the other end of said envelope, a shield formed of resilient sheet material having a central opening and a plurality of wing members radiating therefrom, said shield being positioned between said electrodes and said terminal, and a supporting ring mounted on certain of said supporting wires, said shield having the central portion attached to said ring.

6. A translating device comprising a plurality of electrodes mounted on supporting wires in an envelope of non-uniform diameter, a supporting ring mounted on predetermined supporting wires, a shield mounted on said ring having a plurality of radial sectors and extending outwardly therefrom to flexibly engage said envelope, said ring having a cupped flange formed thereon, and an insulating member mounted within said cupped flange and receiving and retaining the remaining supporting wires in relative spaced relation.

7. A translating device comprising an envelope having portions of difierent diameters, a plurality of electrodes operatively mounted in said envelope, a shield mounted in and extending transversely of said envelope electrically connected with a predetermined electrode, and a metallic coating on the inner walls of said envelope electrically and conductively contacting marginal portions of said shield to provide electro-static shielding substantially enclosing said electrodes, said shield flexibly engaging said coating.

8. A translating device, comprising an envelope having portions of diflerent diameters, a plurality of electrodes operatively mounted in said envelope, a shield disposed transversely in said envelope at one end adjacent said electrodes, and a metallic liner on the walls of said envelope electrically and conductively connected to said shield for cooperation therewith to provide electrostatic shielding substantially enclosing said electrodes, the marginal portions of the shield being substantially contiguous with the metallic liner and flexibly engaging the same.

9. A translating device, comprising an envelope of non-uniform diameter, a plurality of electrodes operatively mounted in said envelope, a shield formed of flexible resilient sheet material disposed in said envelope adjacent one end of said electrodes, said shield extending transversely of said envelope and having a, plurality of projections flexibly engaging the inner walls of said envelope, and a metallic coating on the inner walls of said envelope engaged with said projections, said coating and shield cooperating to substantially enclose and provide electro-static shielding for said electrodes.

10. A translating device comprising an envelope rounding the anode, a member having portions of flexible resilient sheet material disposed transversely in said envelope at one end of said electrodes and a central insulating portion serving to space said electrodes, and a plurality of projections-on the margin. of said member flexibly engaging the inner walls of said envelope and slightly spacing the edge portions of said member from said envelope.

11. In a device of. the character described, a base and an envelope supported thereby, a plurality of electrodes includinga central electrode and an electrode extending annularly about said central electrode, a grid disposed between said electrodes, and a contact disposed on the end of the envelope opposite the base and connected to said grid, a resiliently expansible shield comprising a plurality of radial sectors extending across said envelope between said contact and the grid, and a second shield disposed upon the walls of the envelope between the base and the first mentioned shield, the edges of said first mentioned shield resiliently engaging the inner walls of said envelope.

12. In a translating device, an envelope containing a plurality of electrodes, the walls of the said envelope diverging from one end thereof to a maximum diameter and thence converging, and a shield extending transversely across said envelope, said shield having a resiliently expansible skirt formed of a plurality of contacting radial sectors with marginal portions of each sector resiliently engaging said walls at said maximum diameter.

13. In a translating device, an envelope containing electrodes, and a shield within and extending substantially transversely of said envelope, said shield being formed of a sheet having a central portion and having slits extending outwardly from said central portion to provide a plurality of outwardly extending wings, and said wings being deflected from the initial plane of said sheet to cause their lateral edges to overlap.

14. In a translating device, an envelope containing electrodes, and a shield extending transversely across said envelope, said shield being formed of a sheet having a central portion and with slits extending outwardly from the central portion to provide a plurality of outwardly extending wings, and said wings being resiliently deflected from the initial plane of said sheet to cause their lateral edges to overlap and to cause marginal portions of at least some of said wings to resiliently contact the inner Walls of said envelope.

15. In a translating device, an envelope, a plurality of electrodes, and. means for supporting said electrodes in said envelope including a plurality of wires, one end of said wires being free, an insulating member having a plurality of openings receiving end portions of the wires and providing support therefor,a cupped member extending over and receiving said insulating member, a substantially central portion of the cupped member being struck out to provide an opening for passing the wires, parts of said struck out portion being deflected and secured to certain of said wires, and a shield seated upon said cupped member, said shield having an aperture receiving said deflected parts of said cupped member and passing the free ends of said wires.

16. A translating device comprising an envelope having portions of different diameters, a plurality of electrodes operatively mounted in said envelope including an electron-emitting cathode, a control-grid, an anode, and inner and outer shield electrodes, a member of sheet material disposed transversely in said envelope between the upper ends of. said-electrodes and the upper end of said envelope, and means carried bysaid member extending outwardly .therefromand flexibly engaging the Wall of said envelope around the inner periphery thereof at'a plurality of restricted. areas.

17. A translating device comprising an envelope'having portions of different. diameters, a plurality of electrodes operatively mountediwithin said envelope, said electrodes including'a cathode, an anode, a control-grid, inner and outer shields, said outer shield being contiguous With the inner surface of the envelope, and an end shieldextending across said envelope with the edge portions thereof in flexible and conductive engagement with the said outer shield.

ROGER M. WISE.

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