Nov. 6, 1962 E. J. CARON ET AL 3,063,033 RADIO TUBE SOCKET Filed March 19.‘ 1957 2 Sheets-Sheet 1 5h 64 W54 46“ FIG‘ 3' FIG. 5. INVENTORS EUGENE J. CARON 8| BY GEORGE W. CARTER day. @5217 ATTORNEYS Nov. 6, 1962 E. J. CARON ET AL RADIO TUBE SOCKET 3,053,033 ' Filed March 19, 1957 . 2 Sheets-Sheet 2 "6 122/7 a h F I G. H. INVENTORS EUGENE J. CARON BY GEORGE W. CAR 1 1 I v ATTORNEYS / United States Patent O?Fice 3,063,033 Patented Nov. 6, 1962 1 3,063,033 Eugene J. Caron, Collingswood, and George W. Carter, RADIO TUBE SOCKET separated as illustrated so as to be insulated from each other. The left hand ring 16 is provided for attachment by soldering of the socket in a supporting chassis and the same is true of the right hand end portion of the ring 24. The rings 16 and 24 may be continued by metal discs on the ends of the rod 14 so that they take the form of metal caps. Thus, the socket itself may be rigidly supported. Ths invention relates to radio tube sockets and par A left hand contact member indicated generally at 26 ticularly to sockets for tubes of very small size. 10 is formed of a ?at sheet of metal, desirably silver plated There have been recently developed radio tubes of as are the other metallic conductive contact elements of generally cylindrical shape having lengths of the order the socket. This contact member has several elemental of one-half inch with overall diameters of the order of portions of which the lowermost portion 28 is provided three-eighths to one-half inch, such tubes being well with an opening 30 provided by punching an extrusion to adapted for inclusion in circuits occupying a minimum 15 form a ?ange 32 arranged to ?t over and to be soldered of space. In particular, they are adapted for use in to the metallic ring 18. At 34 there is a transverse bend ultrahigh frequency circuits. It would be evident that between the portion 28 and the portion 36, the latter being the utility of such vtubes depends upon the possibility provided with an extruded inwardly projecting dimple 38. of mounting them in sockets of correspondingly small Another bend indicated at 40 delimits the lower edge of size in which they may be properly held in removable 20 a portion 42 which is directed outwardly to provide a fashion for replacement. de?ecting cam action upon insertion of the tube. The It is the general object of the present invention to contact member 26 is of a spring metal, such as beryllium Harrington, N.J., assignors to Radio Condenser Com pany, Camden, N.J., a corporation of New Jersey Filed Mar. 19, 1957, Ser. No. 647,059 7 Claims. (61. 339-—182) provide socket construction for such tubes which are in themselves very compact and to which direct connections may be readily made, the latter being particularly im portant in ultrahigh frequency circuits. The foregoing and other objects of the invention will be apparent from the following description, read in conjunction with the accompanying drawings, in which: copper. The right hand contact member indicated generally at 44 is rather similar to the member 26 and of similar spring metal, having its lowermost portion 46 provided with an opening 48 extruded to provide a ?ange 50 which ?ts upon and is arranged to be soldered to the metallic ring or cap 24. A bend 52 delimits the upper end of the portion 46 FIGURE 1 is a side elevation and FIGURE 2 is an 30 and above it the contact member is bifurcated by a slit end elevation of a typical tube of the type for which an 54 to provide individual spring portions 56 which are provided with bends 69 beyond which the end portions 62 vention; are de?ected outwardly for camming engagement by the FIGURE 3 is a side elevation of a socket for the re heater buttons 8 of the tube. Each of the portions 56 ception of the tube of FIGURES 1 and 2; 35 is provided with an opening 64 in which there is pressed FIGURE 4 is an end elevation of the left hand contact an insulating ?tting 66, formed, for example, of Te?on member shown in FIGURE 3 looking at the left side and provided with a ?ange 68 arranged to abut and limit thereof as viewed in that ?gure; outward movement of the ?tting. Within each ?tting FIGURE 5 is an end elevation of the right contact there is ?tted a metallic contact pin 70 provided with a member of FIGURE 3 viewed from the right hand side head '72 rounded for engagement by a corresponding but improved socket is provided in accordance with the in - thereof; FIGURE 6 is a transverse section taken on the plane indicated at 6-6 in FIGURE 3; FIGURE 7 is a side elevation and FIGURE 8 is an end elevation of another form of miniature tube; FIGURE 9 is a side elevation of a socket for the recep tion of the tube shown in FIGURES 7 and 8; FIGURE 10 is an elevation of the left hand contact member of the socket, looking at the left thereof as viewed ton 8. Associated with the rings 20 and 22 are clip members 74 which may be of identical form and which are arranged to engage the rings 10 and 12 of the tube. The form of 45 each of these will be evident from FIGURE 6. Each comprises a spring wire, e.g. piano wire silver plated, bent at 76 to provide upwardly extending legs 78 which are bent to provide circular arc portions 80 to embrace and be soldered to the rings 20 and 22‘. The legs then continue ‘ in FIGURE 9; 50 upwardly and are bent at 82 outwardly through somewhat FIGURE 11 is an elevation looking at the right hand more than a right angle to provide seats. They are then contact of the socket as viewed from the right in FIGURE bent inwardly at 84 to provide side portions 86 and then ' 9; and FIGURE 12 is a section taken on the plane indicated at ‘ 12__12 in FIGURE 9. Referring ?rst to FIGURES 1 to 6, inclusive, a typical tube is indicated at 2 which is provided with a ceramic envelope 4 having at its left hand end a metallic button 6 which provides the anode connection. At its right hand further inwardly to provide engaging portions 88 which are spaced by less than the diameters of the rings 10 and 12. At their free ends the legs are everted outwardly at 90 to provide for a cam spreading action during insertion of the tube. The wire used for each of the members 74 has a diameter slightly less than the width of the grooves in which the rings 10 and 12 of the tube are located. end as viewed in FIGURE 1 a pair of buttons 8 provide 60 The contact members 28, 74 and 46 are soldered to the heater connections. Within groves in the body are their respective rings with the socket taking the ?nal metallic rings 10 and 12 providing, respectively, grid and form indicated in FIGURE 3 when a tube is absent. The lower ends of the contact elements may be soldered cathode connections. The tube illustrated in FIGURE 1 to wires or other connecting elements of the desired cir has an overall length of approximately one-half inch. 65 cuit. As will be noted in comparing FIGURES 1 and 3, In accordance with the present invention there is pro these ?gures being to the same scale, the spacing between vided the socket shown in FIGURE 3 which comprises the dimple 38 and each of the contact heads 72 is less an insulating rod '14 of steatite or vitreous alumina, than the overall distance between the faces of the but though it may consist of other insulating material. On this red 14 there are deposited by one of the usual metal 70 tons 6 and 8, though the outer ends of the portions 42 and 62 of the outermost contact members are more widely izing processes rings 16, 18, 20, 22 and 24 which are desirably tinned to facilitate soldering. These rings are spaced. Accordingly, if the tube 2 is pressed down wardly the end contact members are forced apart and at 3 the same time the legs of the contact members 74 are spread apart so that the tube may ?nally rest in a posi tion in which it is endwise compressed between the dimple 38 and the contact heads 7?. and transversely between the legs of the contact members ‘72. Inward movement of the tube is limited by the resting of the rings 1% and 12. on the seats provided by the bends 82, the tube being urged downwardly against these seats by the portions Li. inwardly of dimples then securely holds the tube in posi tion though it may be readily removed by pulling it out wardly. It will be noted that the members 124 are of different lengths so that when the tube is inserted the dif ferent diameter ?anges lie just inside the paired dimples 137. Good electrical contact is provided by the wiping action of the embossings. By this form of socket as in the case of that shown in FIGURE 3, there is provided a small tube-socket assembly which is highly reliable in of the legs below the bends 88 which tend to spring in holding the tube in position while maintaining good con 10 Wardly to provide a downward camming action. The nections to the electrodes. The soldering of the various Wires of these legs are of such diameter that they are contact members to their mounting rings provides a rigid received freely within the grooves in which the rings it) construction particularly maintained by the extruded and 12‘ lie. Thus, good electrical contacts are provided ?anges of the end contact members. The intermediate for the grid and cathode connections. Good spring con contact members 74 and 124 do not require any special tacts are also provided against the buttons 6 and 3. The ‘ ?anging, soldering being su?icient to hold them in posi< tube is thus quite rigidly clamped in position but may tion since the end members prevent the imparting to them be easily removed by pulling the tube outwardly, the vari through insertion and removal of the tube of any con ous spring actions providing yielding movements of the contact members to permit such removal. It will be evident that there is thus provided a socket of very small dimensions comparable with those of the tube itself so that a minimum space is required for the tube-socket assembly. It will be evident that the socket construction may vary ‘with the electrode arrangement of the tube. For example, if the tube is a diode having an indirectly located cathode, the ring in may be missing and the corresponding spring clip member 74 may be omitted. Or double contacts may be provided at the left hand end of the tube corresponding to those at the right hand end and these may provide all siderable disturbing forces. It will be evident that various details of construction may be modi?ed without departing from the invention to take care of special forms of tubes. For example, if a single tube contains both ?anges and contact members set in grooves, there may be used suitable combinations of inner contact members as shown in the two modi?~ cations of the invention which have been described. Fur thermore, different dispositions of the contact members of the socket may be made to accommodate various ex ternal terminal connections of tubes, for example, as pointed out in connection with ?rst described modi?ca~ tion. The insulating member 14 or 106 of the socket may, of course, be non-circular, e.g., rectangular. It is arrangement at 44 could be provided at both ends of the accordingly to be understood that the invention is not to socket, one of the contacts such as '74 being provided be regarded as limited except as required by the following ‘solely to locate the tube laterally and arranged asym claims. 35 metrically with respect to the end contacts to insure place What is claimed is: ment of the tube in proper position. 1. A tube socket comprising an elongated member of The general socket construction which has been de insulating material, end spring contact members secured 'of the external terminals of the tube. Then the contact scribed is also applicable to another type of tube 92 which to said elongated member, and at least one intermediate is illustrated in FEGURES 7 and 8 and which comprises contact member secured to said elongated member be the ceramic body 9%, a button $6 providing an anode 40 tween said end members, said intermediate contact mem connection w ich has an extension 93, a pair of heater ber being provided with opposed leg portions embracing connection buttons 1%, and ?anges 162 and which provide grid and cathode connections. The socket for ‘this type of tube is illustrated in FIGURE 9 and comprises said elongated member and opposed leg portions adapted for embracing a tube and making contact with a tube electrode, said spring contact members being oppositely ‘the insulating rod 1% which may be of steatite, vitreous 45 disposed for contact with the ends of a tube embraced alumina, or other insulating material on which are pro by said intermediate contact member to limit longitudinal vided the rings I198, 119, 112, 114, and 116 of the type movement thereof relative to said elongated member, said ‘previously described, the rings 1% and 116 being desirably intermediate contact member projecting from said elon vcontinued over the ends of the rod to provide caps. The gated member to de?ne a terminal for electrical connec left hand contact member 118 is essentially the same as 50 tion. the contact member 26 previously described though it is 2. A tube socket as de?ned in claim 1 wherein the provided with a slot 126) to receive the button extension tube embracing leg portions and the elongated member 93. The right hand contact member 122, may be iden embracing leg portions are adapted for mounting said tical with the right hand contact member 44 previously tube and member in laterally spaced ?xed relation to ‘described. The intermediate contact members 1124 take 55 one another. ‘a form suitable for engagement with the ?anges 162 and 3. A tube socket comprising an elongated member of 164 of the tube. For this purpose they are desirably insulating material, end spring contact members secured formed of silver plated spring sheet metal, each being to said elongated member, and at least one intermediate doubled back on itself at the tabs 126 which provide for contact member secured to said elongated member be 60 the making of external soldered connections. The con tween said end members, said intermediate contact mem tact members are provided with circular openings 128 for ber being provided with opposed leg portions embracing reception of, and soldering to, the rings 112. and 114. said elongated member and opposed leg portions adapted Bifurcation is provided at 130 to provide outwardly and for embracing a tube and making contact with a tube upwardly diverted portions 132 which are desirably em electrode, said spring contact members being oppositely bossed as indicated at 134 to provide good wiping con 65 disposed for contact with the ends of a tube embraced tacts. The outer ends 136 are everted to permit camming by said intermediate contact member to limit longitudinal spring action as the tube is inserted. Paired dimples 137 movement thereof relative to said elongated member, said are provided near the ends of the portions 132. When intermediate contact member projecting from said elon the tube is inserted, the end contact members 113 and gated member to de?ne a terminal for electrical connec 122 are sprung outwardly as previously described and the 70 tion, said elongated member being one continuous length ?anges 102 and 10d engage and de?ect apart portions 132 of a cylindrical rod having axially spaced metalized sur of the contact members 124. Final seating of the tube face areas to which said contact members are soldered. occurs when the body 94 rests on the ledges provided at 4. A tube socket comprising an elongated member of 138. Friction due to the spring action of the various .insulating material, end spring contact members secured ‘contact members and location .of the flanges M2 and 164 3,063,033 to said elongated member, and at least one intermediate contact member secured to said elongated member be tween said end members, said intermediate contact mem ber being bifurcated for reception of a tube and ar ranged to make electrical contact with a tube electrode, at least one of said spring contact members being bifur 7. A tube socket as claimed in claim 6 wherein said end spring contact members are constructed to urge an embraced tube toward said elongated member. References Cited in the ?le of this patent cated and having mounted upon each furcation thereof UNITED STATES PATENTS a terminal-engaging pin projected therethrough and in sulated therefrom, the corresponding inner ends of said pins being fully exposed. 5. A tube socket as de?ned in claim 1 wherein the in termediate contact member is formed of spring metal, and including two pairs of opposed legs having emboss ings thereon, said embossings on each pair of opposed legs facing each other. 6. A tube socket comprising an elongated member of 15 insulating material, end spring contact members secured to said elongated member, and at least one intermediate contact member secured to said elongated member be tween said end members, sa-id intermediate contact mem 20 ber being provided with opposed leg portions embracing said elongated member and opposed leg portions adapted Brown ______________ __ June 22, 1909 Harvey ______________ __ July 25, 1911 Lyhne _______________ __ Dec. 19, 1922 Buchenberg __________ __ Nov. 30, 1926 1,845,047 2,016,470 2,397,985 2,405,554 2,462,622 2,473,526 Holland ______________ .. Feb. 16, White ________________ __ Oct. 8, Schriei’r'er ____________ __ Apr. 9, Barbour ____________ __ Aug. 13, Farrow ______________ __ Feb. 22, Hood et al ___________ __ June 21, 2,478,887 2,836,807 2,965,873 Nelson ______________ __ Aug. 9, 1949 Goodfellow et al. ____ __ May 27, 1958 Sindelar ____________ _. Dec. 20, 1960 1932 1935 1946 1946 1949 1949 OTHER REFERENCES for embracing a tube and making contact with a tube electrode, and last-named leg portions being constructed to urge an embraced tube toward said elongated member. 925,452 998,895 1,439,429 1,608,578 25 Electronic Equipment (Publication), February 1957 (pages 18-21).