US2380589A - Radio tube socket - Google Patents

Description

July 31, 1945. A. w. FRANKLIN RADIO TUBE SOCKET Filed April 10, 1943 INVEN TOR. A lbw? Frank/1r? Pa lented July 31, 1945 UNITED .STATES' PATENT OFFICE assosso asmo ms sooner Albert w. Mn, New York my. Application April 10. 194:. Serial No. 482.565

2 Claims. (01. ts-'32s) This invention involves improvements in radio tube sockets for special use with the ultra high frequency type of tube known in the art as the acom tube.

The main object of this invention is to Provide an ultra high frequency radio tube socket which is extremely simple in construction and particularly characterized by the features of construction of the pin receiving contacts forming a part thereof.

A particular object vide a contact for sockets of this typ which insures good electrical engagement with the tube pins and which maintains this contact under the normal intensities of vibration to, which suchdevices are subjected.

A further object of the invention is to provide contact clips for this purpose which require a minimum of effort to insert and remove the pins while maintaining good contact with the pins under the severest vibration conditions normally to be encountered.

A more detailed object of thisinvention is to provide a terminal pin clip so constructed as to normally act to maintain firm mechanical and electrical engagement with the tube pins.

'Ihese and other detailed obiects successfully secured by the structure herein disclosed will be fully described in the following specification when taken in connection with the attached drawing.

This invention resides substantially in the combination, construction, arrangement and relative location of parts as will be described in detail below.

In the accompanying drawing:

Figure 1 is a top .plan view of a radio tube socket with terminal clips constructed in accordance with this invention;

Figure 2 is a cross-sectional view taken on the line 2-2 of Figure l; and

Figure 8 is a front elevational view, somewhat enlarged, of one of the contact clips.

The socket oi thisinvention includes a base or support 10 of'any suitable configuration as, for example the ring or washer-like formation illustrated. This support may be made oi any proper insulating material available for eillcient of the invention is to pro-- use especially at ultra high frequencies and, for

example, may be a ceramic material. The base is provided with a pair of holes II by means of which it may be attached to a suitable support in the apparatus of which itis to form a part.

Mounted on the support and. as illustrated, extending radially with respect thereto are a plurality of terminal pin clips or contacts II secured to the support in any suitable manner as. for axe ample, by means of the riveted eyelets l3. Each clip I! i formed from a single piece of suitable resilient metal such as, forexample, phosphor bronze preferably heavily silver plated to provide .low contact resistance with the tube pins.

Each clip includes what may be called a base plate which terminates at one end in a downwardly extending integral tip iladapted to lie in an axial slot is on the inner face of the support "III as is clear from Figures 1 and 2. The opposite end of the base plate is provided with an aperture II by means of which a circuit wire may be hooked thereto and soldered in place in accordance with the usual practice. Extending along the opposite sides of the base plate l4 and integral therewith are a pair of upstanding walls is which have a vertical relation with respect to the plane of the base plate ii. The inner ends of the side walls are out free of the base plate, as is clear in Figures 2 and 3. and are bent so as to lie in converging planes towards the center of the support. The terminal ends is of the converging wall portions are bent towards each other so as to extend towards each other, as is clearly illustrated in the front end elevational view of Figure 8. The upper edges of the ends is are smoothly curved in a downward direction into a pair of straight edges which diverge downwardly into curved edges which terminate in overlappini tips 20. I

As will be seen from the type of socket illustrated, the clips are adapted to receive the tube terminal pins by movement in an axial direction towards the support I 0 as is true of the acorn type of tube whose terminal pins radiate from the base thereof. One terminal pin is shown in cross-section at P inFigure 3 in the position it will assume when the tube is in the socket. In order to reach this position the pin is applied to the top curved edges of the end walls is of the clip and is guided smoothly as it is forced downwardly to a position to cause the converging side walls to move apart to allow the entry of the pin P into the more or less similarly shaped seat defined at the lower diverging edges of the end walls. The downward movement of the pins is limited by the overlapping tips 20 and the adiacent edges of the end walls is being inclined, as shown, exert downward pressure on the pin P causing it to be firmly seated on the tips II and to be firmly engaged at opposite sides of the inclined edges. Thus each pin has at least three points of contact with each clip insuring good mechanical and electrical contact between the pins and the clips. The result is a firm engagementor the clips withthepins toresistvibration while maintaining excellent electrical contact therebetween. By reason 01 the shape of the cooperatingedgesottheendwalls lithepins may be relatively easily withdrawn forcing the iiexible converging side walls apart as the pin is withdrawn. The upper curved edges aid in properly aligning the tube with the socket at the timepressureisappliedtoseatthepins.

From the above description those skilled in this art will readily appreciate the advantages and utility, of the structure herein disclosed and will be aware or possible modifications thereof while employing the novel subject matter herein disclosed. I do not, therefore, desire to be strictly limited to the disclosure given herein in an illustrativesensebutratherbythescopeoitheclaims granted me.

What is claimed is:

1. An electricalcontact terminal clip of metal comprising a bottom wall. a pair of parallel side walls attached to said bottom wall, and a pair of opposed ears at the corresponding ends oi the side walls defining a constricted slot closed on one end and open at the other, said side walls bein: detached from the bottom wall at the edges adiacent said ears and said ears having overlappinz extensions forming the closure for the closed end of the slot. 7

2. In the combination or claim 1. said slot being divergent from a point oi constriction towards its closed end.

ALBERT W. FRANKLIN.

Images