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Publication numberUS2760128 A
Publication typeGrant
Publication dateAug 21, 1956
Filing dateNov 3, 1954
Priority dateNov 3, 1954
Publication numberUS 2760128 A, US 2760128A, US-A-2760128, US2760128 A, US2760128A
InventorsColby Robert A
Original AssigneeCollins Radio Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Grid terminal pick-up plate
US 2760128 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 21, 1956 COLBY 2,760,128

GRID TERMINAL PICK-UP PLATE Filed Nov. 3. 1954 4 U a d I 3 1u l2 Q1 5 l3 INVENTOR I I I; 3 ROBERT A. 001.5)

A T TOR/VE Y United States Patent GRID TERMINAL PICK-UP PLATE Robert A. Colby, Marion, Iowa, assignor to Collins Radio Company, Cedar Rapids, Iowa, a corporation of Iowa Application November 3, 1954, Serial No. 466,625

2 Claims. (Cl. 317257) This invention relates to vacuum tube sockets and more particularly to such sockets employing by-pass condensers.

Priorly, sockets employing by-pass condensers have incorporated tubular condensers in the tube sockets around socket terminals. In high frequency circuits employing electron tubes, to obtain proper circuit operat-ion, some :of the tube elements must necessarily be connected to ground at the desired frequency. This connection should not comprise a ground connection for direct current and it is customary to use a condenser of the proper capacitance to bypass the high frequency currents to ground. There are disadvantages to connecting an ordinary condenser in a normal manner as a by-pass condenser, the primary one being that the leads connecting the terminals and the bypass condenser create an inductive impedance. This inductive impedance becomes larger as the frequency increases and at high frequencies may completely eliminate the ground connection desired. This invention provides a means for using one by-pass condenser to connect the desired tube elements to ground at high frequency with very short and very broad leads or connections, thereby minimizing any inductive eifects.

It is an object of this invention to provide an eifective means of connecting various terminals of a vacuum tube to ground through a by-pass condenser.

It is another object of this invention to provide this connection at very high frequencies and minimize the inductive effects of such connection at very high frequencies.

It is a further object of this invention to provide this connection between the tube elements and ground in an economical manner. It is a further object of this invention to provide for readily connecting various terminals of the tube socket to said by-pass condenser.

Other objects and advantages of this invention will be apparent when the following description is read in conjunction with the drawing, in which:

Figure 1 is a bottom view of the tube socket and its mounting plate with the terminal plate and bypass condenser in position.

Figure 2 is an exploded side view of these same elements and Figure 3 is a side elevation of this invention in position on a tube socket.

The socket structure as shown in Figure 1 is held in position in the terminal plate 8 by a flange 7. This plate 2 is a normal terminal plate and is provided with ears a to fasten the plate to a chassis. The socket is composed of insulating material and is formed with indentations 3 which fit into apertured ears on the terminal plate 2. Socket 5 has prong receiving recessed contacts 13, one of which is shown in Figure 3. Socket 5 has a variable number of contact projections for terminals extending from its lower surface, of which contact projection 12 is one. This projection 12 is bent from the vertical position of the remaining terminals to align with the lug 10 on the terminal pick-up plate 3. This iug 10 and terminal 12 ice provide a connection for external elements if such connection is required by the circuitry in which the tube is being used.

The contact terminals are electrically connected to the prong receiving contacts on the face of the tube socket. Terminal pick-up plate 3, which is basically circular, has lugs or projections on its outer periphery to connect the plate with the desired terminals of socket and has cut- Way sections in its outer periphery opposite the terminals which are not to be connected to plate 3. This pick-up plate 3 has a circular section removed at its center (as shown in Figure 2) to receive the button by-pass condenser 6. This condenser has a lug 4 for connection to ground or to an inter-stage shield as desired. Plate 3 and condenser 6 are soldered or in some manner electrically connected so that terminals on the socket are now connected to ground at radio frequencies through the plate 3 and the condenser 6.

The plate 3 provides the short leads or projections 11 to connect the condenser 6 and the terminals of the tube socket, thereby minimizing inductive reactance to high frequency currents. The plate 3 and condenser 6 operate as described herein as a low impedance connection for frequencies up to several hundred megacycles with miniature tubes. Thus, the invention provides a connection to ground which has minimal inductive impedance at very high frequencies.

Although this invention has been described with respect to a particular embodiment thereof, it is not to be so limited as changes and modifications may be made therein which are within the full intended scope of the invention as defined by the appended claims.

What is claimed is:

l. A socket structure for devices having contact prongs comprising a cylindrical base of insulating material, said base having recessed contacts cylindrically arranged on one flat surface thereof and projected contacts cylindrically arranged on the other fiat surface thereof, a ringshaped plate of conducting material, said plate having a plurality of projections on its peripher the number of said projections being less than the number of projected contacts, the projections of said plate being in contact with certain of said projected contacts, a button condenser having a metallic shoulder as a connection to one electrode of said condenser, said con lenser having means for connecting its other electrode to ground, and said condenser being integrally connected to said plate by said shoulder securely fitting in said plate.

2. A socket structure for devices having contact prongs comprising a cylindrical base of insulating material, said base having recessed contacts cylindrically arranged on one flat surface thereof and projected contacts cylindrically arranged on the other flat surface thereof, a ringshaped plate of conducting material, said plate fitting inside the cylinder formed by said projected contacts and having a plurality of projections on its periphery, the number of said projections being less than the number of projected contacts, the projections of said plate being in contact with certain of said projected contacts, a button condenser having a convex metallic shoulder as a connection to one electrode of said condenser, means for connecting the other electrode of said condenser to ground, and said condenser integrally connected to said plate by snapping said shoulder into said plate.

References Cited in the file of this patent UNITED STATES PATENTS 2,259,740 Del Camp Oct. 21, 1941 2,427,563 Lavoie Sept. 16, 1947 2,496,095 Kallmann Jan. 31, 1950 2,625,582 Hiebel Jan. 13, 1953

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2259740 *Nov 8, 1939Oct 21, 1941Cinch Mfg CorpElectrical connection
US2427563 *Jul 3, 1944Sep 16, 1947Gen Railway Signal CoCombined tube socket and by-pass condenser unit
US2496095 *Jul 10, 1947Jan 31, 1950Kallmann Heinz ECombined tube socket and by-pass condenser
US2625582 *Jan 7, 1946Jan 13, 1953Erie Resistor CorpTube socket
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2840791 *Sep 7, 1955Jun 24, 1958Page Jr FranklinMounting for plug-in units
US3172716 *Jun 14, 1962Mar 9, 1965Special Devices IncClosure arrangement
US3638071 *Dec 31, 1970Jan 25, 1972Motorola IncShorting device
US5181859 *Jun 5, 1992Jan 26, 1993Trw Inc.Electrical connector circuit wafer
US5290191 *Aug 31, 1992Mar 1, 1994Foreman Kevin GInterface conditioning insert wafer
US5387131 *Apr 23, 1993Feb 7, 1995Trw Inc.Network conditioning insert
US5414587 *Dec 30, 1992May 9, 1995Trw Inc.Surge suppression device
US5428288 *Jun 20, 1994Jun 27, 1995Trw Inc.Microelectric monitoring device
US5455734 *Jul 1, 1993Oct 3, 1995Trw Inc.Insert device for electrical relays, solenoids, motors, controllers, and the like
US5568348 *Aug 29, 1995Oct 22, 1996Trw Inc.Insert device for electrical relays, solenoids, motors, controllers, and the like
US5590058 *Feb 24, 1995Dec 31, 1996Trw Inc.Battery monitor for unobstrusive installation with a battery connector
US5692917 *Apr 18, 1996Dec 2, 1997Trw Inc.Computer hardware insert device for software authorization
Classifications
U.S. Classification361/301.2, 439/108
International ClassificationH01G2/00
Cooperative ClassificationH01G2/00
European ClassificationH01G2/00