US 2225728 A
Description (OCR text may contain errors)
w. T. WEIDENMAN, sa `2,225,728 SEPARABLE ELECTRCAL CONNECTOR Dec. 24, 1940.V
.Filed Jan. 3, 1959 j wenn s Patented Dec. 24, 1940 SEPRABLE ELECTRICAL CONNECTOR William T. Weidenman, Sr., Spring Valley, N. Y., C assignor to Telephonics Corporation, New York, N. Y., a corporation of New York Application January 3, 1939, serial No. 248,971
This invention relates to separable electrical connectors, and has particular reference to connectors comprising two interlocking elements adapted to electrically connect a plurality of electrical conductors, regardless of the relatively angular positions of the contacting portions of each element when joined. l
separable electrical connectors are commonly used in aeroplane telephony, particularly as quickly detachable connections for use with radio appliances such as head phones and microphones. These connectors are subjected to varying weather conditions, high and low temperatures and are used in restricted spaces and associated with many other instruments so that little space and poor visibility are provided for manipulating such connections. t v j Because of the field of use of such `devices a desirable type of device, therefore, should bey 2 weatherproof and provide a connection of reasonable strength yet easily detachableby a jerk or pull in emergency. For this and other uses, the elements should be readily connected under all adverse conditions and to that end eliminate t the necessity of fitting parts toa number of par- Accordingly, devices embodying the present invention including cooperating, releasably connected plugs and sockets forming one` set of electrical connections and concentricallyv arranged contact portions thatare capable of` completing circuits when the plugs and sockets are connected, the elements of the device being provided with waterproof sheaths that coact to render the entire connection moistureproof.
The concentric arrangement of the contacts of o the separable elements assures completion of the connections between the several electrical conductors regardless of relative rotation of the parts, thus overcoming the difdculties encountered in inserting multiple prong plugs in connectors having multiple sockets.
For a more complete understanding of the invention, reference may be had to the accompanying drawing, wherein:
Figure 1 is a plan-view of a connector constructed in accordance with the present invention, with parts of the device broken away, a Y cord being appended to one end 'of the connector;
Figure 2 is an enlarged sectional View of the device with the adjacent portions thereof in con- 4 l The stud 38 is encircled by an insulating bushing 55 tacting position completing the circuits; and
the sheaths are cupped, feather-edged and slightly overlength so that the edges deform each other upon abutment, thus sealing the joint and forming a moistureproof connection I3 when members I0 and Il are joined, as illustrated in Figure 2. 15
A suitably insulated electrical lead wire I 4 is molded in the end of the sheath I2 of element I0, and secured in` a recess I8 in the end of a threaded stud `2l) having a flange 20a thereon. the end of wire I4 being serrated to insure suit- 20 able anchorage within the stud 20.
The stud 2U extends through an insulating bushing 22 formed of Bakelite, hard rubber or other insulating material, andis threaded into or f otherwise secured in terminal connecting 25 piece or plug member 26. The bushing 22 includes a iiange 22a which abuts the flange 20a on the stud 20. The plug member 26 may be permanently secured to the stud 20 by punching in or deformlng the plug at point 28- before en- 30 closure within the rubber sheath I2. An insulating bushing 3|) formed of Bakelite or other hard insulating material encloses the major poi tion of the plug member 26 and has an inwardlir directed flange 30a disposed between the plug 35 member -2li and the end of the bushing 22.
VKThe wire or cable` is illustrated as the shielded type, the shield 24 forming its second conductor and encircling and being insulated from the wire I4, as is usual. The shield 24 is electrically con- 40 nected and bound by wire 34 to a metallic sleeve 32, which is supported on the bushings 22 and 30 concentrically with respect to said plug member 26 and insulated therefrom by the bushings 22 and 30. The sleeve 32 includes a reduced por 45 tion 32a which is disposed between the flange 22a on the bushing 22 and the end 30a of the bushing 30, thereby retaining all of these elements in nxed relationship.
The connecting or socket member II similarly 50 consists of a protecting rubber sheath I2 enclosing .a threaded and ilanged stud 38 having a socket in which an electrical conductor 36 is inserted and electrically connected as by solder.
40 throughout a portion of its length and is threaded into a metallic sleeve 42. The sleeve 42 and stud 38 are permanently connected by prick-punching the assembly at 44. An insulating sleeve 46 encircl-es flanged sleeve 42 and together with bushing 40 supports and insulates the concentric contact sleeve 56 from the Contact sleeve 42. lThese elements are assembled and retained in fixed relationship similarly to the corresponding portions of plug member I0.
The outer end of the sleeve 42 is longitudinally slotted, permitting spreading of its flanged ends 50 to allow insertion of coaxial connecting plug 52 on the end of the plug member 26, said plug 52 being undercut to allow the ends 50 to grip and retain the plug 52 after its lnsertion. Any number of slots 41 such as, for example, six, may be provided to render the sleeve 42 sufficiently resilient to allow the anged ends 50to spread` to receive plug 52*` Inasmuch as the sleeve 42 and the sheaths I2 are'resilient, the connector elements I0 and II need not be in alignment when they are snapped together. Moreover, they can be disconnected by pulling them apart axially or by bending them at an angle relatively to eachother.
A conductor 54 is attached to the contact sleeve by a binding 58, a portion of the sleeve silient ngers 66.
of the sleeves 32 and 56 are so related that the 56 extending outwardly beyond the bushing 46 and being slotted longitudinally to provide re- The diameters and lengths ngers 60 are exed outwardly in passing over the end of sleeve 32 when the plug 52 is received within the anged ends 50 of the'sleeve 42, and the ends of the fingers 60 and sleeve 32 are chamfered to allow them to engage easily.
The conductors 36 and 54 may be of any pliable material with high electrical conductivity, such as tinsel, said conductors extending through separate exible insulated elements 62 and 64 that diverge from the connecting member II, thus forming a Y cord as shown in Figure l. Suitably insulated supporting Wires 66 form a framework for the super-imposed soft rubber housing of the Y cord, increasing its strength and also providing a carrying member for conductors 36 and 54. Any other types of conductors may be used instead of Y cord construction, as the particular purpose may demand.
The connecting elements may be easily produced. In assembling for example the connector element I0, .the bushing 22 is slipped onto the stud against the flange 20a, the sleeve contact 32 then being telescoped on the bushing 22 and the bushing 30 slipped between the sleeve contact 32 and the stud 20. The plug member 26 is then threaded onto the stud, locking the sleeve contact 32 and bushings 22 and 30 in place and the assembly punched at 28 to secure it in permanent relationship. The conductors I4 and 24 are then connected to the contact elements, and the rubber sheath I2 molded thereon. The completed connector thus forms a unitary member, in which all of the parts are permanently associated in accurate relationship.
Inasmuch as theelectrical contacts are con centrically disposed it is unnecessary to connect them in any predetermined rotated relationship. Connectors embodying the invention, therefore, are particularly suitable for use under conditions such that they must be connected, and disconnected quickly and without being visable, and thus fulfull the requirements of radio appliances in the aviation field since they eliminate the formation of reversed connections and the necessity of observing the relationship of the parts before connecting. Additionally, the moistureproof coverings of the devices allow them to be used under adverse weather conditions and the soft rubber sheathsreduce the tendency of thel plugs to break under shock and vibration.
While the invention has been described with reference to the specic structures shown in the accompanying drawing, it is not to be limited save as defined by the appended claim.
A separableelectrical connector comprising a pair of connector elements, each having a stud member, a contact carried by the stud member, a pair of insulating elements concentric with said member. a contact sleeve supported on said insulating members concentric with the said stud member and contact and having an inwardly directed flange interposed between said insulating elements, and a resilient moisture-proof sheath having a free outer edge portion of reduced thickness surrounding said stud, insulating elements and sleeve, the contact of one of vsaid connector elements including an undercut plug disposed inwardly of the free edge of its sheath and the contact of the other connector element including a plurality of annularly disposed flanged ngers extending beyond the free edge of its sheath adapted to detachably receive and grip said undercut plug and retain said contact sleeves in engagement and free edge portions of said sheaths in resilient engagement to i form a moisture-proof seal, whereby the connector elements maybe connected and disconnected when in axial alignment or out of axial alignment.
WILLIAM T. WEIDENMAN, Sn.