US1518795A - Electric connecter - Google Patents

Description

Dec. 9, 1924- J. S. JONES ELECTRICAL CONNEGTER Filed Oct. 9, 1 22 [N VEN TOR gym (1 gmw z WMzi/w A TTORNE y:

we 17 o Patented Dec. 9, 192%, li,.l sii,il i? nnnornio NNEC'EEE.

Application files ,Qcioher e, 332%. Serislfio. 59,2 ,272.

T all whom it may concern: 7 The plug in u pref-erred form, illus- Be it known that l, ilossrn S. Jones, tinted, consists of two principal nortions: s. citizen of the United States, and resident composite part A, built upon 1-: piste New York, in the countyof New York and or base 1, and comprising the met-sills (301% 6 btate of New York, have invenced certain ducting and contact members the plug new and useful Improvements in Electrical with their necessary insulating elements, and Connecters, of which the following is a the wire-terminal sockets or iihunecterghnd specification. a housing, insulating and hani ile pert My invention relates to electrical connec- The base-plate i has s screw-lhreml Q'en so ters of the class generally known as plugs, gaging an internal thread in one end of and more particularly to plugs which are housing Ii, and. a knurled flange 3 which especially well adapted to use in telephone engages the end of the housing; wall and switchboard circuits, wireless telephone and forms a, graspinpelement of substantial ditelegraph apparatus and for various other anicter for inserting and removing part A 15 purposes.x as a unit.

The general object of the invention is to A contact sleeve 4- is inserted in a, central provide a plug of strong, eompuctysimple aperture inthe base i and secured in any 4 and economical construction. suitable way, as by screwing or rivetin A more particular object is to arrange the An insulating sleeve 5 is located in contact 2 parts so that bored circuitwrires may be eassleeve 4, and 2, metal conducting and con- 25 of the plug.

ily connected to the plug terminals without necting stem 6 passes through ineinsulating the necessity for looping thetwire ends, or sleeve and at its outer end is screwed into spade or pin wire terminals me be just a contact knob T, and at its inner end IS as readily connected Withonhmo ification screwed into a metal terminal bushing "8, which is a, fist piece of generally oblong A further object is to improve the one form with rounded ones. An insulator 9, chanical structure of plugs in certain which may be substantially the same shape details as sufficiently explained hereafter. as the bushing S, is placed between the bush- The accompanying drawings show certain ing and the base 1, and an insulating washer so exemplifyin structures embodying the in- 10 is located between the contact. knob T and vention. A ter considering}; these, persons the ends of the sleeves 4 and (hie termiskilled in the art will understand that modinal post 11 is sccuredtobushing 8, desirably 'fications may be made without departing in the present case by providing the post from the principles of the invention, and I with a small stem 12 passing through a hole 5 do not limit myself to deteilsexcept as in the bushing and'sccured by upsetting the claimed. end. Another terminal posl; 13 has n longer In the drawings: stem 14 assing through a hole in base 1 and Figure 1 IS a longitudinal section of a secured y upsetting. Post 13 1S insulated lug embodvin the invention in one form b washers 15 16 and 17. A hole 18 is 0 P y g 1 y 1 a about twice the usual size in order to show bored axially in each of the terminal posts,

smallparts clearly. and another hole 19 is bored transversely Figure 2 is a transverse section at 2-2, through each post intersecting the hole 18, lg. 1. and each hole 19 is screw-threaded at one Figures 3 and 4 are detail views showing side of the longitudinal hole to receive a for adaptability of the device to different styles minel screw 20. The posts are set so that of conductor-terminals. the axes of the screws are substantially par- Figure 5 is a detail View of a modificanllel, as best shown in Fig. 2. and in this way lion providing a cord anchor. the screws may he mode of suitable size and Figure 6 shows the general mode of malength, and are easily accommodated withnipulating the 'plug in attaching it to circuit in a casing B of moderate diameter.

wires. The casing B desirably has a longitudinal 'tions A of the plug are so compact in the lengthwise direction that a chamber 22 of ample size may be provided without making the-casing of undue length, or in fact, any longer than is desirable for convenient handling. At the end remote from the terminal posts the casing has an end .wall 23 with an aperture 24 of suitable size to accommodate the conductor cable. r

In some cases the bushing 8 is provided, as best shown in Fig. 5, with a lateral enlargement 25 having a perforation 26 to serve as a conductor cord anchor.

In connecting the plug to a conductor cable the main portions of the plug are separated, asshown in Fig. 6, and the cable C is passed through aperture 24; the cable fabric or casing is cut away to expose the separate insulated conductors C C andthe insulation of the individual conductors or wires w is removed, and the bare wire ends may then be inserted directly into the longitudinal post holes 18 without the necessity of looping the wire ends or providing them with any special form of terminal. T he Wire ends are then securely clamped by setting up the screws 20, and a very firm mechanical grip and electrical contact is obtained by the tendency of the screw ends to deform the Wires and press them into outward portions of the transverse holes 19.

Otherwise, the individual wires may be provided with spade or eye terminals e, Fig. 3, which may be connected by inserting the screw shanks through the terminals and clamping them against sides of the posts, or the individual wires may have pin termi: nals p which may be inserted in the longitudinal holes 18 and clamped in an obvious way, as indicated in Fig. 4. p

The cable may be provided with a cord 8 tied to the cable at s, and this cord may be cut to a suitable lcngtlrand inserted and tied in the anchor hole 26, as sutlicicntly shown in Fig. 6. i

The casing or handle B is then slid down over the Wire ends and screwed on to the base 1, whereupon the plug'is ready for use.

By thedescribed construction and arrangement of parts the cable connections niay be very quickly and easily made or changed.

I claim:

1. A plug for electrical circuits comprising a substantially cylindrical handle and easingmember having a wall at one end apertured to admit a cable, and an internal thread at'the other end, a metal base member screwed into the threaded end of the handle,

a contact sleeve secured in a central aperture in the base, a contact knob at the end of the sleeve and insulated therefrom, a stem passing through the sleeve and insulated therefrom and secured to the contact knob, an insulator on the inner face of the base, a metal terminal bushing on said insulator and connected to the inward end of said stem, a metal terminal post secured to said bushing, another metal terminal post insulated from the bushing and provided witha stem passing through the bushing and secured to the base, the posts extending substantially parallel within thehandle member, the posts having longitudinal holes extending inward from their free ends and terminal screws in; serted in the posts and arranged substantially parallel with their heads in opposite directions and with the screw ends arranged to intersect the longitudinal holes to-secuie wire ends or pin terminals.

2. A plug for electrical circuits comprising a substantially cylindrical handle and easing member having anv'all at one end 'apertured to admit a. cable, and an internal thread at the other end, a metal base member screwed into the threaded end of the handle, a contact sleeve secured in a central aperture in the base, a contact knob at the end of the sleeve and insulated therefrom, a stem passing through the sleeve and insulated therefrom and secured to the contact knob, an insulator on the inner face of the base, a metal terminal bushing on said insulator and connected to the inward end of .said stem, a metal terminal post secured to said bushing, another metal terminal post insulated from the bushing and provided with a stem passing through the bushing and a secured to the base, posts extendingsub stantially parallel within the handle mem her, the posts having axial holes extending inward from their free ends and also having transverse holes arranged substantially parallel, and terminal screws inserted in the transverse holes, the terminal post and screw arrangement permitting the'comiection of various forms of conductorterminals.

3. A. two-conductor electrical plug connecter, the parts constituting a'main insulating' handle and-an assembled plug connection, said handle being a solid of revolu-, tion and being so formedas to accommodate the connecting wires in'one end and the electrical plug assemblyin' the other, which electrical plug assembly is in part composed of a threaded sleeve contact engaging'the said insulating handle, which contact sleeve is a solid of revolution, 'an'd"drilled to accommodate an insulating cylindrical'sleeve, which insulating sleeve is so constructed as to reach from the extreme outer endi'otthe Ill) contact sleeve in front to a point'a'shortdistance behind the rear face of the contact sleeve is a metallic member constituting part of the tip conned ion, which consists of a fiat disc-like lnQllllKl'. :1 shaft fixed to said momher. the. member being: drilled in (me loca tion to receive :1 binding post connection, and drilled in another to zu-con'ln'mclate an insulating bushing! W'llllP the shaftis threaded to accommodate the metallic tip and an insulat'ing washer.

Signed at New York in the vounty of New York and State of New York this 4th day (ff ()vtolver A. D. 1922.

JOSEPH STANSBURY JONES.

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