US1591707A - Attchment-plug receptacle - Google Patents

Description

vJuly 6 1926.

W. H. HARRINGTON ATTACHMENT FOR PLUG RECEPTACLES lied Sept. 8, 1922 2 Sheets-Sheet `l mv n@ Nw MN .l

M H H M m L a N Bij/MM July 6 1926.

` w. H. HARRINGTON ATTACHMENT FOR PLUG RECEPTACLES Filed Sept. 8, 1922 2 Sheets-Sheet 2 Patented July 6, 1926.

UNITED STATES PATENT oF F ICE.l

WILLIAM H. HARRLNGTON, or HARTFORD,

CONNECTICUT, A'SIGNOR TO THE ELECTRIC COMPANY, OF HARTFORD CONNECTICUT, A CORPORATION OF CONNECTI- CUT.

ATTACHMENT-PLUG RECEPTACLE.

Application led September 8, 1922. Serial No. 588,911.

My invention relates to attachment plug receptacles, and particularly to receptacles of the flush type. The object of my inven tion is to sim lify and improve the structure of both the insulating body and electrical conductors of the receptacle, while maintaining full electrical and mechanical efficiency of the structure.

In the accompanying drawings- Fig. 1 is a ceptacle in w in one form; Y

Fig. 2 is a broken inverted plan thereof;

Fig. 3 is a section on the line 3-3, Fig. 1;

Fig. 4 is a section on the line 4-, Fig. 1;

Fig. 5 is a perspective of the. combined terllninal and contact element for the receptac e;

Fig. 6 is a section of a modified construc- 0 tion of the means for holding the parts assembled;

Fig. 7 is a plan view Aof a single iiush receptacle in which the invention is embodied;

Fig. 8 is a section on the line 8 8, Fig. 7;

Fig. 9 is a broken inverted plan of the body portion of the receptacle;

Fig. 10 is a perspective of one of the combined wire terminal and receptacle contact elements; and

Fig. 11 is a plan view of the same.

The construction shown in Figs. 1 to 6 inclusive illustrates a duplex receptacle, affording two sets of receptacle contacts arranged in arallel in a single fitting. The insulating bbdy of the fitting comprises two spaced bays 15 and 16, each having a pair of contact chambers, said bays being united by an integral web 17 of less diameter. On the upper face of the body, the web 17 is depressed, and the bosses 18 and l19thus formed by the up er portions o f the bays, project into or t apertures in the face plate 2O for a fiush receptacle such as shown, as is now ,common practice in the art. l

Seated in longitudinally extending recesses 21 in the lower face of the bays 15 and 16 and web 17 are straps 22, one at each ls)ide of the longitudinal center line of the ase.

minal lug 23 car 'ng a binding screwr24 by means of whidli,1 a lead wire may be secured thereto. In assembled position .the

straps lie with,their outer edges substantially aligned w'th the sidefwalls of the ich my invention is embodied plan view of a duplex flush re-` rough similarly shaped,

Offset from each strap is a wire terweb 17, and the offset wire terminal lugs 23 11e against and are supported by the opposite side walls of the web which takes the strains incident Ito the turning down of the screws 24 to bind the leadwires. To accommodate the Shanks of these screws the web 17 is recessed at appropriate points 25.v

Inasmuch as the straps 22 are identical, one being reversed with respect to the other, on opposite sides of the web 17, and further inasmuch as the terminal lugs 23 are offset from the straps 22 at a point to one side of the longitudinal center of the stra the binding screws are apart ori-opposite sides of the web 17. The recesses 25 to accommodate the inner ends of the binding screwsare thus offset from one another, and the -strength of the web is thus maintained. l

At cpposite ends of each strap 22 I pro-4 vide o set contact fingers 26, 27 and 28, ,so shaped and related to each other that they form cooperating contact brushes, each` group adapted to receive and engage jack blades inserted either (1) between the face of the brush 28 on the one hand, and the face of brush y26 and edge of brush 27 on the other hand, or

angles to the foregoing, that is between the face of brushA 27 on the one hand, and the edge of brush 26 on the other hand', with an edge engagement face of the brush 28. To receive these con- 1s recessed from its lower face to a pair of wells 30 and 31, the upper face of the receptacles a pair of T-slot a ertures 32 and 33` for the uidance of jack E ceptacle contacts 4in either of the two positions above mentioned.' f

Each strap 22 is also provided at its opposite ends wlth a lug 34 adapted to be received in a recess 35 adjacent the wells .30 and 31.4 These `lugs have the function of retaining the stra s 22 in position and resistin the frictiona drag of the jack blades wen the latter gagement with the contacts.

To support the straps 22,l and their associated elements on the insulating body, I

provide a yoke 36 extending beneath the atter and having u with offset lugs 38 ierced at 39 to accommoj date screws by"wh1ch the receptacle may be tacts, each bay 15 and 16 of the recpptfaclel or a spaced longitu inally Y (2) in a position at right I Aof the jack blade by the to which open from lades into'en agement wit the -reare withdrawnmfrom en pwardly angled ends 37 integral unit, the sup ceptacle body itself mounted in an outlet box (not shown), in accordance with the usual practice. Inas-` much as the yoke 36 is of metal, it is spaced from the straps 22 by sheets of insulating material40, such as fiber, mica', or the like, which may be arranged ab ve the yoke, or both above and below, an mechanically' support the straps 22 and serve to hold them in position, and prevent contact with stray wire beards. i The yoke may be secured to the insulating body in any7 suitable way. Thus. as illustrated in Figs. 1 to 4. the heads of rivets 41 are molded in the insulating bodv of the receptacle. at a point intermediate the straps 22. while their Shanks pass through the in sulation 40 and yoke 36, and are spread bcneath the latter. In Fig. 6 a single rivet 42 is used passing through the body of the receptacle, 4 f The face plate 20 may be secured in position by a screw 43 taking into a tapped rivet;- 44 molded into the upper portion of the web 17 of the body, or into the tapped4 upper endl cf the rivet 42 in the construction shown in ig. 6. y In they modification showninllligsaf? to 11 inclusive, the underlying features are identical. Thus, the insulating body comprises a boss 45 integral with the web 46.. Let into the lower face of the insulating body are rivets 47 which pass through he insulating plates 48 and position beneath the base and to support the combined wire terminal and contact members 50. In this construction, which embodies the invention in a single outlet receptacle, each strap 50 has but a single set of contact lugs 26, 27 and 28 oiiset therefrom, and entering the contact chambers 51, one at each end of the body. The. wire terminal lugs 52 lie against the opposite sides of the web 46, and the latter is pierced to accommodate the Shanks of the binding screws 53. In this construction the shanks of the binding screws enter the respective chambers 5l, in which'the associated contacts of the strap are arranged.

In both constructions, the invention4 presents marked economies over rece tacles in common use, by reason of the re uction in amount of material employed in the body of the fitting, the combination of the wire ter? minal with the receptacle contacts as an rt not only of the rein the outlet box, r-but alsoof the contact straps upon the insulatin ,body of the receptacle b means of the yo e iece, while the means or securing the yoke' inl position are of the simplest possible character. `The appearance of the receptacle is an improvement upon those in which lthe securing screws pass through the exposed portion of the insulating body, .the vosses of the present construction having with the `yoke,

' supporting yoke definitely .locates fh'olesin the lugs yoke 49 to hold the latter in commodated in said merely guide slots for the jack blades of the cooperating plug. The receptacle contacts are adapted for cooperation with both tandem andparallel blades, and for polarity construction of the latter. The shallow base permits the receptacle to bemounted in wall moldings, While when mounted in outlet boxes an increased wiring space is available. The one-piece contact and wire termina] construction insures the best possible electrical connection between these parte.

.with no possibility of defect through the loosening of securing screws, and the like. The arrangement of the binding screws at the sidesV of the webs enables wiremen to eiiec't a. loop connection with the binding screw without diiiculty. The one-piece the position of the holes 39 for the reception of the the latter may bia/.poin register with the tapped of a standard outlet box. Various modifications in details of construction will occur to those dealing with the mounting screws, and sitioned exactly claim as my invention.

I claim- I A 1. An attachment plug receptacle comprisingamolded insulating body rec from its lower face to aiord a contact chamber, `a.contact ventering said chamber from said lower' face of the body, and having an associated wire terminal lyin against a side of said body, 'sheet insulation underlying said contact, means for securing said contact in position, and receptacle supporting means engaged by said securing means.

2. An attachment plug 'receptacle comprising an insulating body recessed from its lower face, a contact member lyingl against thelower face of said body and aving a contact projecting into said recess in the body, and an oisetwire terminal lug lyin 'against aside of'said body, a shect meta problem, without departing from what l strap passing beneath the insulating body and serving to support said contact member against the lower face of the body, in assem led position, and means for securing said strap to the insulating body, together with means for insulating said strap from the contact member. f

3. An attachment pug receptacle comprising an insulating dy recessed from its lower face to aiord a contact chamber with lateral channel vopening to said contact chamber, said body being pierced from its outer face to aord a guideway for a jack entering said chamber, in combination with a contact member adapted to enter said chamber from the back of thev body, an a8- sociaited wire terminal' adapted to lie .the side of Ithe body member, a

screw carried by saidwire terminal and aclateral-channel in the body during the insertion of the contact into said chamber. sheet insulation underlying said contact in assembled position, and means for securing said sheet insulation to the base to support the contact in said chamber.

4. An attachment plug receptacle comprising an insulating body recessed from its lower' face to aiiord a contact chamber with lateral channel Aopening to said contact chamber, said body heilig pierced from its outer face to afford a guideway for a jack entering said chamber, in combination with a contact member adapted to enter said chamber from the back of the body, an associated wire tern'linal adapted to lie against the side of the body member, a binding Screw carried by said wire terminal and accommodated in said lateral channel in the body during the insertion ol the contact into said chamber, sheet insulation underlying said contact in assembled position, together with a sheet metal member arranged beneath ihe receptacle body and sheet insulation and .secured lo the body to support said contact brush and wire terminal in 'assembled posilion.

5. An attaclunent plug receptacle comprising an insulating body recessed from its lower face to aliord contact-receiving chambers, and pierced from its outer face to afford guideways leading to said chambers,

contacts arranged below the body of the re.

ceptaclo and projecting into said chambers, associated Wire terminals extending from said contacts to exposed position at the side of the receptacle body, in combination with a` metallic strap passing beneath the receptacle body and contact chambers, a sheet of insulation separating said strap from the contacts arranged in said chambers, and means for permanently attaching said strap to the insulating body, said strap affording means for supporting the contacts in their respective chambers and also means for supporting the receptacle body in an appropriate location.

6. An attachment plug receptacle comprising a molded insulating body recessed from its lower face to afford contact-receiving chambers and pierced from its outer face to afiord guideways leading toV the chambers, contacts extending into said charian bers from the lower face of the receptacle.y associated Wire .terminals extending from said contacts to exposed position at the side of the receptacle body, sheet insulation underlying said c0ntaets,a sheet metal member underlying said sheet insulation, together with securing means molded into the lower vface of the receptacle bodyand affording tacle, associated wire terminals extending from said contacts to exposed position at the side of the receptacle body, sheet 'insulation underlying said contacts, a sheet metal member underlying said sheet insulation, together with securing means molded into the lower face of the receptacle body and afford ing means for securing the sheet metal member in position, said sheet metal member embracing the op osito ends of the receptacle body and ailiornling means for mounting the receptacle in an appropriate location.

8. An attachment plug receptacle comprising a molded insulating body recessed from its lower face to receive contacts and on opposite sides to receive wire terminals, in combination with a pair of one-piece combined contact and wire terminal units, each of said units being ap lied to the receptacle body from its4 lower ace, with the contact housed within the body, and its associated `wire'terminal exposed at the side of the body, the wire terminals of said units being located at opposite sides of the body, in combination with sheet insulation underlying said units, means for securing said insulation to the body, and receptacle supporting means engaged by said securing means.

In testimony whereof I have signed my name to this specification.

WILLIAM H. HARRINGTON.

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