US 2417369 A
Description (OCR text may contain errors)
March 11, 1947. H. P. LUHN 2,417,369
MULTIPLE CIRCUIT CONNECTOR OF THE PLUG TYPE Filed March 29, 1944 3 Sheets-Sheet 1 f/VULA 7/071 :9 7
INVENTQR ATTORNEY HANS P. LUHN.
March 11, 1947. H. P. LUHN 2,417,369
MULTIPLE CTRCUIT CONNECTOR OF THE PLUG TYPE Filed March 29, 1944 3 Sheets-Sheet 2 lNVENTOE-t 'HANS P. LUHN.
' Ti'oRNEY March 11, 1947. H. P. LUHN 2,417,369
MULTIPLE cmcun' CONNECTOR OF THE PLUG TYPE Filed March 29;, 1944 3 Sheets-Sheet I5 INVENTOR HANS P. LUHN.
ATTORNEY Patented Mar. 11, 1947 MULTIPLE CIRCUIT CONNECTOR OF THE PLUG TYPE Hans P. Luhn,
Armonk, Y., .assignor to International Business Machines Corporation, New
York, N. Y.,
a corporation of New York Application March 23, 1944-, Serial No. 528,656 (01. 173-428) Claims.
This invention relates to circuit connectors and generally to the detachable plug type for making multiple circuit connections at will. More specifically the invention relates to multiple circuit connectors of the plug type wherein circuit connections can be made by the attachment of associated connector units and conversely circuit connections can be broken by detachment of the associated connector units.
The main object of the invention is to provide an improved construction of circuit connector wherein a plug connector of a limited area can provide for a larger number of circuit connections than generally possible heretofore, and a more specific object in this connection is to devise a circuit connector which will not only provide for an increased number of'circuit connections but enable efficient circuit connections as well.
Another object of the invention is to provide a circuit connector which consists of three interconnecting units, an intermediate connector unit, and a pair of connector units joined at each side of said intermediate connector unit.
An advantage following from the preceding construction and which fulfills another object is that each of the outside connectors can be pro vided with means to receive plug connections which can be altered at will without changing the plug connections made to the other outside connector. This flexibility is of a decided advantage for circuit connections in some electrical systems.
Another object of the invention is to provide means to assemble a plurality of such associated units whereby circuit connections can be multiplied to the required number and nevertheless retain the principal advantages of the elementary system.
This object may be carried out by providing an intermediate frame to which is assembled a plurality of intermediate connector units and other frames for carrying a plurality of the plug connector units of the other type, that is, the type which provides for the desired plug connections.
The assembly of panel the intermediate connectors and allows another plugboard having different plug connections to be substituted. The same advantages are in this multiple arrangement as in the elementary system, namely, that the plug connections on the plug connectors can be varied at will without altering the plug connections of the other plug connectors.
plug COnneCtOI'Si provides a or plugbo'ard which can be detached from Other objects or the invention will be pointed: out in the following description and claims and illustrated'in the accompanying drawings, which disclose, by Way of example, the principle of theinvention. and the best mode, which has been contemplated, of applying that principle.
In said drawings:
Fig. 1 is an end view of eachof the three connector units showing the association of the three units of the elementary system.
Fig. 2 is a fragmentary view in side elevation of the intermediate connector.
Fig. 3 is an end view of the intermediate connector.
Fig. 4 is a sectional view taken on the line l i of Fig. 2.
Fig. 5 is a plan view of nector.
Fig. 6 is a fragmentary view in side elevation of one of the outside plug connectors.
Fig. 7 is a fragmentary plan view of. the plug connector shown in Fig. 6.
Fig. 8 is an end view of the plug connector shown in Figs. 6 and 7.
Fig. 9 is a. sectional view taken on the line Q-9 of Fig. 6.
Fig. 10 is a View Fig. 6.
Fig. 11 shows the the multiple jack.
Fig. 12 is a fragmentary plan view showing the the intermediate contaken on the line I il -IE! of preferred construction of supporting frames which carry the assembly of the different connector units to multiply the circuit connections to make upa plugboard.
Fig. 13 is a fragmentary plan view of one of the outside frames.
Fig. 14 is: a view showing the three connector I units joined together in contact relationship, and
when mounted in the frames of Fig. 12 show how the frames are closed upon each other to secure a contact relationship between the" connector units.
The three principal elements of the improved connector are shown associated in Fig. 1 and shown joined in interlocking contact relationship in Fig. 14'. The improved' plug consists of an intermediate connector unit ill and cooperating outside plug connector units H and I2. The plug connector unit H has wire connections t3 and the plug connector unit 12" has wire connections HI. When the units It, H and I! arejoined in contact relationship as in Fig. 14' the wires [3 are electrically connected through the units to the wires 14 for desired circuit con nections.
slots 2|, 22 of the 9,417,369 ii I V.
' of the connectors H) and desired number of contact blades 23, but as shown J herein the elements l5, support for two series of contact blades with ten in each series. A e provided with two series of slots 2| and likewise the block I1 is provided with two series of slots 7 22 and such slots receive the spring blades, 24 to not only suitably space them in insulating relationship but also to provide a support for such blades. Each contact blade 20 is provided with shoulder portions 23 and 24 fitting in the related blocks |5 and H, respectively. Of course, the block it in cooperation with the block I5 also secures the contact blades 20 of the other series in a similar manner. When all of the parts are in the assembled relationship, shown in Fig. 5, the blocks l5, l6, and H. are fastened together by a tubular rivet 25 at one end and a similar form of rivet 26 atthe other end (see Fig. 14). By the above preferred construction the intermediate connector l3 provides for a suitable spacing of. the contact blades20 and mounting thereof. V The plug connector units H and I2 which are joined to each side of the intermediate connector |0 are alike in construction. The description will be confined to only. one of these plugs connectors with particular reference to Figs. 6 to 11, inclusive. Each plug connector II or l2 consists of a main body portion 30 which is rectangular in shape conforming to the length and width of the intermediate connector Hi. This main body portion is made of insulating material, either. molded to the desired shape or formed by machining.
- The'main body portion has extending therefrom a comblike structure consisting of teeth 32 and intermediate recesses or channels 33. Within these channels 33 are interposed the resilient contact blades 34 and 35. Each row of contact blades 34 consists, as shown in Fig. 14, of five.
contact blades bent in one direction and inv the adjacent row the series of five contact blades 35 are similarly formed but are. bent in opposite directions. Therefore, there is disposed in each channel 33, but in two adjacent rows so as to be separated from each other, a contact blade 34 which is adapted to make firm electrical contact with a blade 29 and also a contact blade 35 adapted to make electrical contact with the adjacent blade 2|]. 7 The adjacent pairs of blades 25 are spaced apart, equivalent to the width of the channel 33 so that as plug connector II or I2 is joined to the intermediate connector l0, one of I the blades 23 of each pair will slide between the contact blade 34 and the surface 35 (Fig. 6) of the channel and the adjacent contact blade 23 will slide between the. contactblade 35 and the surface 31 (Fig. 6) of the same channel 33. The blades 34, and 35 are resilient and while slightly displaced from normal position by a blade 23as shown in Fig. 6, nevertheless the extremities are" l3 and 11 provide the The intermediate block. |5is r 20. Each connectormaybe assem- .7 blades 34 and 35'can bled to provide the supporting means for the" 4 not moved sufficiently so th t they make contact with the adjacent blade 20 at the other side of the channel 33. This keeps the circuit connection established through the contact blades 34 and 35 independent to thereby eliminate any possible back circuits. To facilitate the joining .Hporllland |2, the to provide flared edges to contact makchannels 33 are machined 38 whereby blades 23 are guided 'ing position.
for carrying the contact be provided, but consists a construction which enables the Any suitable means preferably of contact blade carrying units to be manufactured that the. blades 34 alike, irrespective of the fact and 35 extendin opposite directions. Furthermore, it is preferable to make such contact blade carrying units of such construction that there is formed at the extremity opposite the blades 34 or 35 jacks 44 in which plugs may enter to make the desired electrical connections. These plugs aredesignated by 43 inFig. l4 and are soldered to the extremities of the'wires it or l4.
The construction of each blade carrying unit is best shown. in Fig. 11 wherein it will be seen that it consists of parallel cylinders 4| and 42 which areseparated from each other by an integral strap 43 but electrically connected by such strap. The contact blade 34 or 35 is an integral extension of cylinder 42. The plugs 43 are entered in the jacks 44 formed at the ends of the cylinders 4| and 42 to provide the desired plug connections. While generally only, one plug connection is usually made, the duplex jack construction provides for two plug connections for the same con-l tact blade which is sometimes desirable.
In Fig. 13, it will be observed, that for each row of contact blades 34 or 35 ten holes are provided to receive five of the units shown in Fig. 11. In the adjacent row to'the left where the same number of holes are provided to receive a similar number of blade carrying units such holes are staggered (see Figs. 13, 7 and 10). Now referring to Figs. 6 and '7, it will be seen that in the righthand row the units 4|, 42 of Fig..1l are mounted so that the contact blades 35, extend in one direction. A unit 4|, 42 can be inserted in the holes until strap 43 abuts the bottom ofchannel 33. By insertion of the units 4|, 42 in theholes of the adjacent row but turned oppo-' sitely, it will be seen that the blades 34 .will be 7 disposed in the channels 33 but extend in an op-.
posite direction. Hence, this enables the blade carrying units of Fig. 11 to be manufactured alikebut by assembling them oppositely with respect to adjacent rows, contact blades 34 and 35 extend in opposite directions. To securely hold contact blade carrying units 4|, 42 within the holes of the block 34, the jack formed extremities of.
the cylinders are cut to provide locking portions 45 which extend above the plane of the block 30 and which may be suitably offset or bent away from the cylinders 4| and 42 as shown in Fig.10 to effectively lock with cooperation of strap 43,
the blade carrying unit in assembled position. It is, of course, obvious that by the construction just described the jacks 44 of adjacent rows are staggered to provide a more convenient means of fitting the plugs 40 therein. This also reduces the possibility of short circuits in the event that a non-staggered arrangement was utilized.
It is further evident that since the intermediate connector l0 provides for five circuit 0 11-;
nection'sfor each row and therefore tenj circuit connections for two rows, the associated plug con:
a um-see for the same number of circuit connections. The
two jacks 44 for each unit 4|, 42 enable the possibility of two circuit wire connections It to one or two wire circuit connections l4, and conversely.
Whenever it is desired to readjust or change the circuit connections made to either the plug connector I I or 12, it is to be noted that one may be dissociated from the intermediate connector unit Ill and such plug connections may be read justed with ease without, however, afifecting the plug connections made to the other plug connector or 2. The preferred form of multiple plug construction also enables a large number of circuit connections with a minimum of space without, however, creating the possibility of short circuits. The arrangement in Fig. 14 shows the connectors l5, H and I2 associated so that when each series is plugged to maximum capacity, five circuit connections through the wires [3 may be operatively associated with five wires M for each row. However, the possibility of ten circuit connections for two rows is not the limitation of the present device and an arrangement will be now described which will point out the extended circuit connecting capacity of the present arrangement.
The arrangement above referred to is shown in Figs. 12, 13 and 14 wherein reference numeral 50 represents a frame which, relative to swinging frames and 52, is stationary. The frame 55 may be mounted in the framework of the machine, a base casting or by other means and is adapted to carry a plurality of the intermediate connectors l5 of the type shown in Figs. 2, 3, 4 and 5. The frame 55 consists of an upper plate 5.3 and a lower plate 54 (Fig. 14) spaced apart by any suitable means, such as a sleeve 5-5 fitting over a cooperating fastening bolt and nut 55. Of course, at the other end of frame 50 a similar spacing means is provided. Between the frame plates 53 and 54 of frame 50 there is attached a series of the intermediate connectors Ill.
The preferred form of locking means for looking the intermediate connectors in position consists of resilient plates 51 (Figs. 2 and 3) mounted at each end of the connector Hi by the aforementioned tubular rivet or 25. Bent out of each of the plates 51 are locking projections 58 which, as shown in Fig. 3, are semi-circular in form. Each of the plates 57 is provided with a bent-over portion 59 at each end. When the connectors ID are assembled on the frame 55 between plates 53, 54, the bent-over portions 59 fit beyond the longitudinal edges of the frame plates 53 and 54 (see Fig. 14). The semi-circular locking projections 58 will, through the resiliency of the plate 51, cooperate with circular locking holes 6|! formed in the frame plates 53 and 54 (see Fig. 12) Each plate 51 is provided with four locking projections 58 (see Fig. 3) to cooperate with a similar number of holes 55 in the cooperating frame plates 53 and 54 to prevent movement of a connector ll) in either direction. By such fastening means the connectors ill are rigidly but releasably secured to the frame 56 and may be detached therefrom by manually pressing the portions 59 of the plates 51 away from the cooperating frame plates 53 or 54 to completely disengage the locking projections 58 from the holes 60. The frame 50 may receive and have attached thereto an indefinite number of intermediate connectors lil, depending upon the circuit connecting requirements. The capacity of 6 course, can be extended indefinitely, depending upon the length of the frame 55.
Associated with the frame 50 are the afore mentioned swinging frames 5| and 52 which are shown to have a movement relative to the frame 50 by virtueof their pivotal mountings El and 62 to the frame 50 (Fig. 12). This relative displace- I ment is provided for so that in the manner of a gate theframes 5| and 52 may be swung away from the frame 50 to facilitate the positioning of the intermediate connectors In. Each of the frames 5| and 52 is, adapted to carry plug connectors ll, |2 of the type as shown in Figs. 6-10 and as many connectors of this type are attached to the related frames as is necessary to conform to the circuit connection requirements. In general, there is one of such plug connectors H, |-2 in the frames 5| and 52 for cooperation with the intermediate connector I5 in the frame so, thereby providing a plurality of multiple plug circuit connecting devices of the elementary system. i i The preferred means for attaching the'plug connectors H or IE to the frames 5| and 52 will now be described. At the end of each of these connectors there is secured by tubular rivets 53 attaching plates 54 (see Figs. 6, 7 and 8). These are cut out to form fingers 55 and 66 and each plate 64 has a bent-over portion 57. In positioning the plug connector i or I? between the frame plates Ill, Ii the fingers 55 and 56 enter in recesses 58 between fingers 59' (see Fig. 12'). The recesses 55 and fingers 55 are formed by suitably cutting out the frame plates it and H of the movable frames 5|, 52. Each of the frame plates l5 and 'H is bent as shown in Fig. 12 at l2'so that the recesses 65 and fingers 59 are in the same plane as fingers 65, 65 to provide the positive interlocking relationship of the cooperating elements. When the plug connectors i2 are assembled on either the frames 5| or 52, the bent-over portion 61 cooperates with the outside marginal edge 16 of the frame plates 10 or H (see Fig. 14). To firmly lock such plug connectors H, vided a channel piece 15 which passes over the marginal edge 75 of the frame plates 15 and H of frames 5|, 52 and by cooperation with the bent-over portion 67 the plug connectors I2 are locked to the frames 5| and 52 to prevent their movement when the frames 5| and 52 are closed upon the frame 55 for making the desired circuit connections through the connectors placed in contacting relationship.
It is obvious, therefore, that when the required number of connectors of the two types previously described are mounted upon their respective frames, multiple circuit connections may be completed through such connectors, depending upon the requirements. The principal advantage of this arrangement is that the plug connections made to the plug connectors ii carried by the frame 52 may be variously changed while the plug connections to the plug connectors, i2 carried by the frame 5| may be unchanged and not interfered with. With the frame 52, for example, carrying several of the plug connectors H and with the plug connections made thereto, it is evident that thi provides a plugboard with multiple circuit connections made through plugs and related jacks. In the same way the assembly of several.
plug connectors I2 on the other frame 5| will form a plugboard in which plug connections may be made to the desired jacks. In some electrical systems it is desirable to have one of these plugboards associated with certain electrical elements l2 to the frames 5|, 52, there is proby'the selective plug connections." The circuit connections can be made through the plug connectors of the type described herein and at the other plugboard 52 selective, plug connections are made to other elements of the machine in which it is desirable to change at will the last named described plug connections- One requirement in which the present arrangement will find particular use is in tabulating machines wherein a number of plugboards are provided, each having plug connections, dependent upon-the specific form of tabulating card controlling the machine. In the present arrangement such plug connections may be made on'the plugboard of frame 52 and used to control the machine. When the requirement changes this plugboard may be detached from the machine and another one substituted. In such change it is, of course, obvious. that-the other plugboard remains in permanent electrical connection with the intermediate connectors I carried by the stationary frame 50, although, of course, plug connections thereon may be independently changed. The arrangement just described is so flexible in its use that it is evident that it may be utilized in different ways,,depending upon the selective circuit requirements of the electrical system.
' While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a single embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art Without departing from the spirit of the in- 1 vention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.
What is claimed is:
1. A selective circuit connector for multiple circuits comprising an intermediate frame carrying a plurality of intermediate connector units, each comprising a body portion carrying contact members extending oppositely for circuit connections at each side of said body, individual means carried by each of said connector units to lock the latter at desired positions of said frame, a plurality of frames mounted at opposite sides of the intermediate frame and each carrying a plurality of plug connector units carrying contact members cooperating with the related contact members of the intermediate connectors when said frames are releasably joined together, and said plug connector units carrying jacks integral with the related contact members for receiving plugs variously positioned in said jacks, the releasable interconnection of said frames enabling one of said frames to be dissociated from the intermediate frame to enable plug connections on the plug connectors carried thereby to be changed, While the plug connectors on the other frame remain associated with the intermediate connector units of the intermediate frame and its plug connections remain unchanged, and means for collectively locking one or more plug connectors to the related frame at desired positions for co: operation with the intermediate connector units locked at corresponding positions.
2. A circuit connector for multiple circuits comprising a contact support member carrying a single series of spaced contact plates, portions of which project from the plane of said support to provide a series of contact making blades, a 00- operating contact member comprising a body, a plurality of teeth extending from one side of 8 said body,'each' of which bears against adjacent contact blades and retains them separatedwhen said members are joined, said teeth providing intervening recesses for internally receiving a pair of contact blades when said members are joined, Q
contact fingers carried by said body and shaped and arranged in such manner that a pair fitting within the related recess clear each otherras-they araboth' inwardly moved by contact with-the associated pair of contact blades inserted in the recess when said members are joined, and plug receiving jacks integral with said contact fingers and disposed at the outsideoi' said body. i 7
3. A circuit connector for multiple circuits comprising an intermediate connector unit having a contact support body carrying a single series of spaced contact plates, portions of which project from each side of said body to provide twoseries of oppositely extending contact making blades,
a pair of cooperating connector units disposed at each side of the intermediate connector unit and each comprising a support member having in-' tegral blade separating teeth, each of the re-' cesses separating adjacent teeth receiving a pair of adjacent contact blades, contact fingers car- 7 ried by said support member and shaped and arranged in such manner that a pair of contact fingers within the related recess clear each other as they are both moved inwardly by contact with a pair of blades'inserted in the recess when a cooperating connector unit is joined to said intermediate connector unit, and jacks integral with said contact fingers and arranged on the other side of said support member for receiving variously disposed plug connections.
4. A circuit connector for multiple circuits comprising a contact support member carrying a single series of spaced contact plates, portions of which project from the plane of said support to provide a series of contact making blades,,
a cooperating contact member comprising a body, a plurality of teeth extending from one side of the body, each of which bears against adjacent contact blades and retains them separated when said members are joined, said teethproviding intervening recesses for internally receiving a pair of contact blades when said members are joined, a series of contact fingers extending in said re cesses and corresponding in number to the num ber of contact plates and carried by said body in two spaced and staggered series, one series bent in one direction to make contact with the blades at one side of the recesses and the other series bent in the other direction to make con-. tact with the blades at the other side of said recesses.
5. A circuit connector for multiple circuits comprising a contact support member carrying a' tact plates and carried by said body in two spaced and staggered series,.one series bent in one direc-v tion to make contact with the blades at one side of the recesses and the other seriesbent in the other direction to make contact with the UNITED STATES PATENTS blades at the other side of said recesses, and
jacks integral with said fingers and arranged on Number ame Date one face of said body in two spaced and staggered 445,751 Hoflman Feb. 3, 1891 series. 5 12,17 44 Davison Oct. 3, 1939 HANS LUHN 2,124,207 Neesen July 19, 1938 2,006,436 Bowers July 2, 1935 REFERENCES CITED 2,111,118 Lake Mar. 15, 1938 2,283,040 Brinkmann et a1. May 12, 1942 g g ggg gg ggf of in the 10 2,265,341 Borchert ec. 1, 1941 FOREIGN PATENTS Number Country Date 114,796 Austrian Oct. 2'5, 1929