US 2095254 A
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Description (OCR text may contain errors)
Patented Oct. 12,- 1937 UNITED s'lxa'rssy PATENT OFFICE SHIELDED CONNECT@ 'll'neodore B. Holliday and Raymond K. Stout,
Dayton, Ohio Application May 8, 1935, Serial No. 20,40G
(Granted under theact of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein maybe manuof plugs and the other a plurality of complemen- 15 tary sockets, said shell members being relatively rotatable so that one may be screwed into the other, and one of them being rotatable relative to the circuit making contact members enclosed within it. m l
0 In accordance with a further feature of the invention the socket member comprises a block having shouldered recesses each -for receiving a conductive socket member through the rear end thereof. Each conductive socket is shouldered at 95 the rear end and provision is made of aslotted retaining plate removably mounted on the rear end of the block and adapted to overlie the sho,u1 dered ends of all of the conductive sockets to retain them in place.
In accordance with a further feature of the invention,v each of the conductive socket members is adapted to have a conductive wire soldered to the rear exposed end thereof and is formed to 35 facilitate the securement of a iish wire tothe forward end of the socket member, the arrangement being such that a socket member may be soldered to the appropriate wire, then pulled through an electrical conduit,and thenvassem- 40 bled with the other socket members in the socket block.
In accordance with a` further feature of the invention, the block assembly comprises a plurality oi terminal posts set in a common insulating base 45 member and each having secured to it a jack or stem formed of a piece of. resilient vsheet metal,-
having a central body portion and radial arms the arms beingfolded tc bring their ends together and having their ends received in a recess v50 of the terminal post, so that they form resilient Vslightly bulging sides for the jack or stem of which they form a part.
Other objects and advantages will hereinafter appear. l 55 In the drawings forming part of this speeltication and illustrating certain preferred embodi-J ments of the invention,
Figure 1 is a fragmentary view in a side elevation of a completely assembled plug embodying 1 features of the invention;
Figure 2 is a sectional view of the plug of Figure 1, the two units being shown separated slightly one from the other;
Figure 3 is a. view in elevation of the socket' block and of the retaining plate, the latter being shown in a position ready to be slipped into place on the socket block; f
Figure 4 is a view in rear elevation showing the retaining plate applied to the socket block;
Figure 5 is a view in front yelevation of the jack 15 assembly;
Figure 6 isa view in front `elevation of the socket block with the socket members shown in place;
Figure 7 is a disassembled view in sectional side au elevation showing the parts forming the socket assembly; and
Figure 8 is a view in sectional elevation illustrating a modied embodiment of the invention.
The plug is composed of two principal units, as seen in Figure 2, namely,'a jack unit l and a socket unit 2.
The jack unit comprises a base block 3 of suitable insulating material such as "Bakelite and a shell member 4 which may be desirably made of 30 aluminum. The jack unit may be attached to the junction or other box by means of screws 5, which extend through ears 6 formed on the shell base and through holes in the base 3. The base 3 is provided with a number of passages l through 35 it for `receiving the shanks 8 of terminal posts 9. Nuts l0 are threaded on the outerends of the terminal posts 9 for clamping conductive terminal members Il of wires l2 to the respective posts.
Each terminal post includes an enlarged head 40 I3, and each head is provided with an abutment shoulder M for engaging the inner face of the base plate 3. Each head I3 hasa cylindrical res cess formed in the forward face thereof for recaving a jack as. Each jack is soldered in the recess of one of the base heads I3. Each jack is made of sheet metal. and comprises a tip Portion It and bulging arms I1.l The arms il, which inltially extend `radially from the portion I3 are folded down into substantial parallelism and conjointly form the resilient bochr of the jack. The ends of the arms l1, remote from the head I6 are inserted in the recess of one of the terminal post .base heads vl 3 and soldered in place.
sneu member 4 is provided with an internal 55 allel slots 39.
thread I8 for coacting with an external thread I9 formed on a shell member 20, the latter shell member forming the housing member of the socket unit. 'I'he shell member 2U is cylindrical in form and is provided at the rear end thereof with an internal annular shoulder 2|. A bushing 22 has an external flange 23 thereof disposed within the shell 20 against the shoulder 2|, and the body of the bushing projects outward through an opening in the rear end of the shell. A cylindrical spacer sleeve 24 of insulating material is set in the shell against the flange 23 of the bushing 22. A socket assembly 25, which will be described in ,detail presently, is set in the shell against the spacer sleeve 24, and the elements are retained in place by means of a resilient split retaining ring or wire 21 which is snapped into a groove 21a formed in the shell 20, adjacent the mouth thereof. The described parts may be readily taken out of the shell for inspection, repair or replacement by rst removing the retaining ring 21.
The socket assembly 25 comprises a cylindrical socket block 26 which is free to rotate relative to the shell 2|). bores 28 extending through it, each bore being reduced in size at its forward end to provide a rearwardly facing annular shoulder 29. The socket bores correspond in number and position to the jacks or pins of the jack assembly. A metallic socket member `30 may be inserted in each bore 28 through the rear of the socket block 26. Each socket member 30 engages at its forward end against the shoulder 29 of the bore in which it is inserted, and each socket member 30 is provided with a bore 3| in axial alignment with the reduced forward portion of the bore in the block. Each socket member 30 has a. reduced rear end portion 32 and is provided with an abrupt annular shoulder 33 surrounding such reduced portion. 'Ihe shoulders 33 stand substantially flush with the rear face of the socket block 26, and the reduced portions 32 protrude beyond the rear face of the socket block. Each of the reduced portions 32 has a central, axial recess 34 formed in it, in which an electric Wire may be soldered. 'I'he sockets 30 are all held in place in the socket block by means of a retaining plate 35 and a retaining screw 36. The retaining screw 36 is threaded into a bushing 31 which is fixed in a' recess 38 of the socket block.
'I'he retaining plate 35 is formed of insulating materialand is provided with a plurality of par- It will be observed that the ends of the sockets, which protrude beyond the rear face of the socket block, are arranged in parallel rows and that the retaining screw 36 is in line with the central row. Each slot of the retaining plate 35 is, therefore, adapted to receive a plurality of the protruding members 32 and to overlie the shoulders of a plurality of the socket members 30 to retain the socket members in place. The central slot also receives the shank of the screw at4 the end of the slot remote from the base of the slot, and may be clamped down firmly against the back of the socket block by rotation of the screw. 'Ihe arrangement makes possible` quick and economical of the parts.
.The fact that the socket members may be readily put in place through the rear of the socket block and then retained by the plate 35 has the further important advantage that the Wires do not have to be soldered to the socket members after the socket members have been assembled in the block. Each socket member 30 may beinassembly and disassembly The socket block has a plurality of dividually soldered to its wire, then drawn through a conduit which is coupled to the bushing 22, then put in place in the socket block and retained by the plate 35. To facilitate the pulling of a socket member, together with its attached wire, through a conduit by means of a fish wire, each socket member has a pair of diametrically aligned openings 40 formed in the wall thereof near its forward end. The sh wire may be passed through these openings for attaching it temporarily to the socket.
Suitable indicia, not shown, are desirably provided upon the face of the socket block 26 and upon the individual sockets 30 to assure correct assembly. Similar indicia are provided on the outer face of the base plate 3 of the jack unit to facilitate the connection of the wires to the the bores of the socket block before any relative4 rotation of the shell members 4 and 20 occurs. Thus the jacks are properly located with reference to their sockets and hold the socket block 26 against rotation as the shell 20 is rotated to screw it into the shell 4. 'I'he screwing together of the shell members forces the resilient jacks into the sockets 3| of the socket members 30, and causes good electrical connections to be made.
, If desired, a dummy post or guide pin 4| may be provided upon the base 3 for entering one of the bores 28 of the socket block, and this particular bore may be left empty for cooperating with the guide pin. The guide pin 4| is preferably a little longer than the jacks, is large enough in diameter to fill the forward end of the bore 28 with which it cooperates, and is rounded on the end so as to facilitate its entry into the cooperating bore. The guide pin relieves the jacks of the necessity of resisting relative rotation of the jack unit and the socket block.
Ihe manner in which the parts of the socket unit may be quickly and completely disassembled is particularly well illustrated in Fig. '7. In this figure the retaining ring 21' has been removed from the groove 21a. 'I'he socket block 26 has been withdrawn from the shell 2|). 'I'he retaining plate 35 has been withdrawn from the socket block 26. One of the socket members 30 is shown as partially withdrawn from the socket block, and all are free to be withdrawn. The spacer sleeve 24 is shown withdrawn from the shell 20, and the bushing 22, which is the only part remaining in the shell, can be readily Withdrawn or merely dropped out of the shell by turning the shell open end downward.
In Fig. 8 a modified form of connecter is shown. This connecter is generally similar to the connecter of Figures 1 to 7 and corresponding reference numerals, with the subscript a added, have accordingly been applied to corresponding parts. The parts thus numbered will not be again described. 'I'his form diiers from the form of Figures 1 to 7, in the fact that an elbow 42 is rotatably mounted upon la reduced end portion 20h of a shell 20a. Thesocket block 26a is provided with a shouldered retaining post 36a in place of the screw 36 of Figure 2, and this post .s lsituated centrally of the socket block. The
post 36a is, itself, provided with an axial threaded bore 36h, and a screw I3 which passes throughla wall of the elbow 42 in alignment with axis of the shell 20a is threaded into. the bore 36D and serves both to retain the elbow 42 in association with the shell 20a and to retain the socket block 26a in its proper location in the shell 20a. The spacer sleeve 24 and the retaining ring 21 of Figures 1 to 7 are dispensed with. The retaining `plate 35a of Figure 8 is caused .to bear against the shoulder '21a of the shell 2M, and hence is pressed around socket block 26a.
'I'he use `of a guide pin as described in connection with Figures l to 'I ls not a necessary feature, particularly where a large number of' lacks is employed, and hence the form of Figure 8 has been illustrated as not including a guide pin. n
The elbow 42 is-shown as provided with the union coupling 44 on the outer end thereof.
We have described what we believe to be the preferred embodiments of our invention. We do not wish, however, to be confined to the embodiments shownbut what we desire to cover by Letters Patent is set forth in the appended claims. 1. In an electrical connecter, a socket unit, comprising a shell member, a socket block therein, a plurality of conductive socket members set in the socket blockfrom the rear and each having a rearwardly facing shoulder and a reduced rear end portion, a retaining plate having parallel slots extending through its periphery, the reduced portions of the sockets being arranged in parallel rows so that the retaining plate can be moved laterally into embracing relation to alLof said reduced portions, and means for securing the retaining plate to the back of the socket block.
-2. In an electrical'connecter. a socket unit, comprising a shell member, a socket block therein, a plurality of conductive socket members set in the socket block from the rear and each having a rearwardly facing shoulder and a reduced rear 'lend portion, a retaining plate having parallel slots extending through its periphery, the reduced portions of the sockets being arranged in parallel rows so that the retaining plate can be moved laterally in embracing relation to all of said reduced portions, and a screw threaded in the socket block and having its shank received in one of said slots and its head overlying the retaining platei for holding the retaining plate to the socket bloc 3. In an electrical connecter, a socket unit, and a jack unit, said units comprising complementary cylindricalshell members adapted to be screwed togetherfsald socket unit comprising a cylindrical socket block fitting in the shell member of the socket unit, a plurality of conductive socket members in` said block, a retaining plate overlying the socket members on the rear of the socket block, a headed member extending axially of the socket block and having the head thereof disposed over the retaining plate for holding the latter to the socket block, an elbow mounted on the shell of the socket unit for rotation about the common axis of the shell and the socket block of said unit, and a screw threaded axially into said headed member, for holding the elbow to the shell and the socket block in place.
THEoDoRE B.HoLLmAY. RAYMOND K. s'rou'r.