US2557746A - Electronic-tube socket contact - Google Patents
Electronic-tube socket contact Download PDFInfo
- Publication number
- US2557746A US2557746A US116903A US11690349A US2557746A US 2557746 A US2557746 A US 2557746A US 116903 A US116903 A US 116903A US 11690349 A US11690349 A US 11690349A US 2557746 A US2557746 A US 2557746A
- Authority
- US
- United States
- Prior art keywords
- contact
- pin
- tube
- socket
- electronic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011324 bead Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
- H01R33/74—Devices having four or more poles, e.g. holders for compact fluorescent lamps
- H01R33/76—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket
- H01R33/7607—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket the parallel terminal pins having a circular disposition
- H01R33/7614—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket the parallel terminal pins having a circular disposition the terminals being connected to individual wires
- H01R33/7628—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket the parallel terminal pins having a circular disposition the terminals being connected to individual wires the wires being connected using solder
Definitions
- My invention relates to electrical contacts and more particularly to a contact adaptable for a socket designed to receive an electronic tube.
- the tube socket be rovidecl with contact elements each capable of supporting a 0.090 inch diameter pin having a 3 ounce weight suspended upon it after a 0.096" diameter pin has been inserted and removed ten times from the contact element.
- the pins on the radio tubes have an inherent diametric tolerance of plus or minus 0.002". For example, for
- a tube pin having the diametric variations above noted, such element being so designed as to permit frequent insertion and removal of the tube pin into and out of contact element without overstressing the same and so reducing or otherwise impairing its capability for making proper electrical contact with the tube pin inserted therein.
- Another object of my invention is to provide high pressure points of contact or low contact resistance between the pin and an electrical conducting socket contact.
- Another object of my invention is to provide a wiping contact between a tube socket and tube which will remove any severe oxide or other contaminations, which otherwise would result in high resistance contact.
- Fig. 1 is a perspective view of a socket contact sleeve in association with the prong or pin of an electronic tube;
- Fig. 2 is a rear view sleeve per se
- Fig. 3 is a side View of the socket contact of the socket contact a 0.093 pin the diameter limits of the pin are e e; a d 0.091" to 0.095".
- I show a pressed metal electrical contact sleeve or pin contactor, generally designated as A, a plurality of which are adapted to be mounted in any suitable manner upon the supporting socket for an electronic tube having imately 0001" due to a coating film of solder or pron s r pi u a r sp v l n toxide, so that the actual diameter of the tube a l n h l v on a t members of the pin or prong ranges between 0.091 to 0.096" socket.
- Each sleeve contact member A is after the tubes come from the tube manufacturing plant and wires are soldered to the bottom of each such pin or prong.
- the variation of tube pins described in the aforementioned example is correspondingly applicable to pins of other diametrical sizes.
- an object of my invention to provide a contact element capable of satisfactorily adapted to receive the pin of an electronic tubepin, whereby the tube will be mechanically supported by the socket and the pins on the tube will be electrically engaged by the sleeves on the socket.
- the electrical contact sleeve A is formed of electrically conductive sheet metal which is preferably suitably coated to render it non-corrosive,
- the socket A is formed to provide a longitudinally split, generally tubular upper section A and an arcuately shaped lower section A transversely curved to the same wall curvature as that of the upper section A
- the upper tubular section A is provided along the longitudinal line of its split with a pair of laterally spaced longitudinally extending edge portions 14 and I6 which are respectively flattened and disposed in angularly related intersecting planes extending chordally across minor parts of the full circumference of said tubular section A
- These angularly related flattened portions I l and I6 are'respectively provided with longitudinally extending parallel.
- edges l0 and I2 and constitute in eliect, a pair of resilient wing-like elements which serve conjointly with the circular portion of the tubular section A to engage the tube pin B at three circumferentially spaced points.
- the tubular section A is circumferentially restricted to provide an internal bead 20. adjacent the entrance and it of the sleeve contactA, this bead being extended to and through the flattened portions it and 16 thereof.
- the internal bead 20- not only reinforces and strengthens the contact sleeve against its being overstressed beyond the elastic limit of the sheet material of which it is formed, but also provides points of contact for the tube pin, which are of lower electrical resistance than would be. the case were the pin in elongated line or surface contact with the sleeve. Also, the circumferentially spaced point contacts permit the tube pin to rock within or assume a non-coaxial relation with respect to the contact sleeve without reducing the efficiency of the electrical connection between the pin and its contact sleeve, at the same time that they present high pressure wiping contacts for removal of severe oxide or other such surface contamination as might result inexcessive. resistance against passage of current through the connection between the pin and its contact sleeve.
- extension or terminal 22 integrally formed at the lower end of the sleeve which may have hooked sides 26 so that an electric wire or conductor may be attached thereto, and there also may be an eye or opening in the terminal 2.4 end for receiving an electrical conductor.
- the number of sleeves which are installed on a tube socket will depend upon the number of pins or prongs on the tube, and in the case of a lock-in or an octal socket the number of pins may be eight in number.
- the split tubular portion A of the contact sleeve A fits into a circular opening suitably formed in the insulating base of the socket while its arcuately shaped portion A which normally projects beyond the lower surface of the; socket base, may be indented so that it will engage said lower surface of the socket base in order that the sleeve will not be pulled from said base.
- a sleeve-type contact element for an electronic tube socket comprising a one-piece sheet metal part stamped and rolled to provide a generally tubular section for receiving 1e contact pin of an electronic tube, said tubular section being longitudinally split to provide it with a pair of laterally spaced longitudinally extending edge portions, the laterally spaced edge portions being respectively flattened and disposed in angularly related intersecting planes extending chordally across a minor part of the full circumierence of said tubular section, said tubular section, including its laterally spaced flattened edge portions, having an internal circumferential bead providing three tangential contacts with a tube contact pin inserted into the tubular section of said contact element.
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Description
June 19, 1951 w. l. INGHAM ELECTRONIC TUBE SOCKET CONTACT Filed Sept. 21, 1949 INVENTOR. WILLIAM \RVYIN INGHAM Patented June I9, 1951 Application September 21, 1949, Serial No. 116,903
NT FFlCE 2 Claims.
My invention relates to electrical contacts and more particularly to a contact adaptable for a socket designed to receive an electronic tube. This application is a continuation of my ccpending application, Serial No. 664,767, filed April 25, 1946, now abandoned.
While heretofore, sockets having tub'ular contact elements for receiving the pins of electronic tubes have been employed, it has been found that with repeated use, poor electrical contact be-= tween the contact element and the tube pin often results, due generally to the fact that the metal comprising the contact element spreads to such extent that no electrical contact exists or at least an unsatisfactory contact is established between the contact element and the tube pin.
For example, for one type of tube, radio manufacturers have required that the tube socket be rovidecl with contact elements each capable of supporting a 0.090 inch diameter pin having a 3 ounce weight suspended upon it after a 0.096" diameter pin has been inserted and removed ten times from the contact element.
With the contact element of my invention, I am able to meet the requirements hereinbefore set forth so that after many times ten insertions of a 0.096" diameter pin in its socketcontact element, the latter will still support such pin even when weighted with ounces instead of the aforementioned specified test weight of only 3 ounces.
It is further to be pointed out that the pins on the radio tubes have an inherent diametric tolerance of plus or minus 0.002". For example, for
receiving and supporting therein a tube pin having the diametric variations above noted, such element being so designed as to permit frequent insertion and removal of the tube pin into and out of contact element without overstressing the same and so reducing or otherwise impairing its capability for making proper electrical contact with the tube pin inserted therein.
Another object of my invention is to provide high pressure points of contact or low contact resistance between the pin and an electrical conducting socket contact.
Another object of my invention is to provide a wiping contact between a tube socket and tube which will remove any severe oxide or other contaminations, which otherwise would result in high resistance contact.
Other objects of my invention are to provide an improved device of the character described, that is easily and economically produced, which is sturdy in construction, and which is highly efficient in operation.
With the above and related objects in View, my invention consists in the details of construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accompanying drawing in which:
Fig. 1 is a perspective view of a socket contact sleeve in association with the prong or pin of an electronic tube;
Fig. 2 is a rear view sleeve per se;
Fig. 3 is a side View of the socket contact of the socket contact a 0.093 pin the diameter limits of the pin are e e; a d 0.091" to 0.095". The tube manufacturers, how- Fi 4 i a op pl n v w as ak n al n h line ever, have commercial reasons for guaranteeing of their tolerances to plus or minus 0.003", and thus such manufacturers will accept as a 0.093" pin one having a diameter variation of from 0.090" to 0.096". While a 0.093" pin is commercially made within the tolerance limits of 0.091 and 0.095" as previously explained, the actual pin diameter is soon increased approx- Referring now in greater detail to the drawing wherein similar reference characters refer to similar parts, I show a pressed metal electrical contact sleeve or pin contactor, generally designated as A, a plurality of which are adapted to be mounted in any suitable manner upon the supporting socket for an electronic tube having imately 0001" due to a coating film of solder or pron s r pi u a r sp v l n toxide, so that the actual diameter of the tube a l n h l v on a t members of the pin or prong ranges between 0.091 to 0.096" socket. Each sleeve contact member A is after the tubes come from the tube manufacturing plant and wires are soldered to the bottom of each such pin or prong. The variation of tube pins described in the aforementioned example is correspondingly applicable to pins of other diametrical sizes.
It is, therefore, an object of my invention to provide a contact element capable of satisfactorily adapted to receive the pin of an electronic tubepin, whereby the tube will be mechanically supported by the socket and the pins on the tube will be electrically engaged by the sleeves on the socket.
The electrical contact sleeve A is formed of electrically conductive sheet metal which is preferably suitably coated to render it non-corrosive,
The socket A is formed to provide a longitudinally split, generally tubular upper section A and an arcuately shaped lower section A transversely curved to the same wall curvature as that of the upper section A The upper tubular section A is provided along the longitudinal line of its split with a pair of laterally spaced longitudinally extending edge portions 14 and I6 which are respectively flattened and disposed in angularly related intersecting planes extending chordally across minor parts of the full circumference of said tubular section A These angularly related flattened portions I l and I6 are'respectively provided with longitudinally extending parallel. edges l0 and I2 and constitute in eliect, a pair of resilient wing-like elements which serve conjointly with the circular portion of the tubular section A to engage the tube pin B at three circumferentially spaced points. In order to provide for maximum contact pressure at said three points of contact and to insurev maximum spring of the flattened wing-like portions. 14 and IS, the tubular section A is circumferentially restricted to provide an internal bead 20. adjacent the entrance and it of the sleeve contactA, this bead being extended to and through the flattened portions it and 16 thereof.
It will be noted that by virtue of the inturned. flattened portions i4. and 16, the tube pin B represented by dotted lines in Figure 4, is engaged by the internal bead 29 at three circumferentially spaced pressure points.
The internal bead 20- not only reinforces and strengthens the contact sleeve against its being overstressed beyond the elastic limit of the sheet material of which it is formed, but also provides points of contact for the tube pin, which are of lower electrical resistance than would be. the case were the pin in elongated line or surface contact with the sleeve. Also, the circumferentially spaced point contacts permit the tube pin to rock within or assume a non-coaxial relation with respect to the contact sleeve without reducing the efficiency of the electrical connection between the pin and its contact sleeve, at the same time that they present high pressure wiping contacts for removal of severe oxide or other such surface contamination as might result inexcessive. resistance against passage of current through the connection between the pin and its contact sleeve.
There is an extension or terminal 22 integrally formed at the lower end of the sleeve which may have hooked sides 26 so that an electric wire or conductor may be attached thereto, and there also may be an eye or opening in the terminal 2.4 end for receiving an electrical conductor. The number of sleeves which are installed on a tube socket will depend upon the number of pins or prongs on the tube, and in the case of a lock-in or an octal socket the number of pins may be eight in number.
The split tubular portion A of the contact sleeve A fits into a circular opening suitably formed in the insulating base of the socket while its arcuately shaped portion A which normally projects beyond the lower surface of the; socket base, may be indented so that it will engage said lower surface of the socket base in order that the sleeve will not be pulled from said base.
Although my invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention maybe variously embodied, and the scope. of the invention is to be determined as claimed.
What is claimed to be new and useful is:
1. A sleeve-type contact element for an electronic tube socket comprising a one-piece sheet metal part stamped and rolled to provide a generally tubular section for receiving 1e contact pin of an electronic tube, said tubular section being longitudinally split to provide it with a pair of laterally spaced longitudinally extending edge portions, the laterally spaced edge portions being respectively flattened and disposed in angularly related intersecting planes extending chordally across a minor part of the full circumierence of said tubular section, said tubular section, including its laterally spaced flattened edge portions, having an internal circumferential bead providing three tangential contacts with a tube contact pin inserted into the tubular section of said contact element.
2. In a sleeve-type contact element as defined in claim 1 wherein said internal bead is located adjacent the entrance end of said split tubular section and wherein the latter section is provided with a terminal extension in longitudinal continuation of the arcuate, unsplit portion of said tubular section.
WILLIAM IRWIN INGHAM.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,017,940 Bessey Oct. 22, 1935 2,211,726. Knutson Aug. 13, 1940 2,269,605 Smith Jan. 13, 1942 FOREIGN PATENTS Number Country Date 381,393 England Oct. 6, 1932 471,375 France Oct. 24, 1914 559,579 England Feb. 24, 1944
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US116903A US2557746A (en) | 1949-09-21 | 1949-09-21 | Electronic-tube socket contact |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US116903A US2557746A (en) | 1949-09-21 | 1949-09-21 | Electronic-tube socket contact |
Publications (1)
Publication Number | Publication Date |
---|---|
US2557746A true US2557746A (en) | 1951-06-19 |
Family
ID=22369931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US116903A Expired - Lifetime US2557746A (en) | 1949-09-21 | 1949-09-21 | Electronic-tube socket contact |
Country Status (1)
Country | Link |
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US (1) | US2557746A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677116A (en) * | 1950-03-21 | 1954-04-27 | Hugh H Eby Inc | Electronic tube socket |
US2740942A (en) * | 1953-06-05 | 1956-04-03 | Breeze Corp | Bi-metal contact springs |
US3054083A (en) * | 1957-09-24 | 1962-09-11 | Aymar Julian Robert | Electrical contact devices |
US3075169A (en) * | 1960-06-13 | 1963-01-22 | Amico Anthony F D | Snap-in contact for multiple connectors |
US3120989A (en) * | 1961-04-10 | 1964-02-11 | Burndy Corp | Electrical socket contact |
US3155448A (en) * | 1960-09-19 | 1964-11-03 | Haydon Switch & Instr Inc | Electrical connector |
US9985358B2 (en) * | 2016-08-18 | 2018-05-29 | Foxconn Interconnect Technology Limited | Electrical connector with short length along mating direction |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR471375A (en) * | 1913-04-28 | 1914-10-24 | Jean Paul Marie Malleville | Mechanical or electrical connection device |
GB381393A (en) * | 1931-12-02 | 1932-10-06 | Dora Gottlieb | Improvements in thermionic valve-holder and like metal tubular sockets |
US2017940A (en) * | 1933-01-14 | 1935-10-22 | Cinch Mfg Corp | Socket for vacuum tubes and the like |
US2211726A (en) * | 1938-03-05 | 1940-08-13 | Cinch Mfg Corp | Electrical socket |
US2269605A (en) * | 1939-03-31 | 1942-01-13 | Rca Corp | Socket |
GB559579A (en) * | 1942-10-14 | 1944-02-24 | Carr Fastener Co Ltd | Improvements in and relating to holders for thermionic valves and other electric devices |
-
1949
- 1949-09-21 US US116903A patent/US2557746A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR471375A (en) * | 1913-04-28 | 1914-10-24 | Jean Paul Marie Malleville | Mechanical or electrical connection device |
GB381393A (en) * | 1931-12-02 | 1932-10-06 | Dora Gottlieb | Improvements in thermionic valve-holder and like metal tubular sockets |
US2017940A (en) * | 1933-01-14 | 1935-10-22 | Cinch Mfg Corp | Socket for vacuum tubes and the like |
US2211726A (en) * | 1938-03-05 | 1940-08-13 | Cinch Mfg Corp | Electrical socket |
US2269605A (en) * | 1939-03-31 | 1942-01-13 | Rca Corp | Socket |
GB559579A (en) * | 1942-10-14 | 1944-02-24 | Carr Fastener Co Ltd | Improvements in and relating to holders for thermionic valves and other electric devices |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677116A (en) * | 1950-03-21 | 1954-04-27 | Hugh H Eby Inc | Electronic tube socket |
US2740942A (en) * | 1953-06-05 | 1956-04-03 | Breeze Corp | Bi-metal contact springs |
US3054083A (en) * | 1957-09-24 | 1962-09-11 | Aymar Julian Robert | Electrical contact devices |
US3075169A (en) * | 1960-06-13 | 1963-01-22 | Amico Anthony F D | Snap-in contact for multiple connectors |
US3155448A (en) * | 1960-09-19 | 1964-11-03 | Haydon Switch & Instr Inc | Electrical connector |
US3120989A (en) * | 1961-04-10 | 1964-02-11 | Burndy Corp | Electrical socket contact |
US9985358B2 (en) * | 2016-08-18 | 2018-05-29 | Foxconn Interconnect Technology Limited | Electrical connector with short length along mating direction |
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