US2125485A - Electrical connecter - Google Patents

Description

Aug. 2, 1938. A. E. CALDWELL ELECTRICAL CONNECTER Fil ed Feb. 28, 1936 Patented Au:- g I UNITED STATES PATENT OFFICE ELECTRICAL ooNNEc'rEa Albert E. Caldwell, Lockport, 111., asslgnor to George D. Ladd, Lockport, Ill.

- Application February 28, 1936, Serial No. 66,260

' 3 Claims. (01. 173-322) My invention relates to electrical terminals and Fig. 7 is a view similar to Fig. 6 but showing a particularly to plug connecters such as are used terminal pin seated in the socket.

for connecting conductor cords to electrical ap- Referring to the drawing, the connecter of my pliances. invention includes a suitable body or grip portion Devices this type .-usually comprise a body I comprising two complementary members 2 portion of insulating material having mounted which may be of molded insulated material and therein a plurality of socket type contacts. The which may be permanently secured together by a body portion ordinarily consists of two complerivet 3 or by any other suitable means. Formed mentary half sectionsfand the conductors or elecin the inner faces of the members 2, are recesses 4 m trical cord with which the connecter is used are f rming seats f r a p of improved Contact connected to the contacts within the body by suitments 5, which are adapted to be connected to able screws or the like. the conductor wires 6 oi the usual electrical cord 1.

Under the requirements of the insurance un- In the form shown, each of the contact elederwriters for connecters of the above described ments 5 comp a socket member 8 r ve e type, an approved plug must be capable of susor otherwise rigidly secured to an offset arm 9 15 taining a weight of twenty pounds applied across of a tang Ill. The socket member 8 may be made the contacts and the associated cord, for a period of a single flat strip of metal which is doubled of five minutes, without permitting separation of over the arm 9 to which it is riveted so as to the cord and the contacts, when. the screws for form a p of substantially Parallel Spaced secfastening the cord conductors to the contacts tions II and H. the free ends of which are 20 .have been backed oflf one-halt turn. The princivexed outwardly to form.the socket for one of pal object of the present invention is to provide the terminal pin l3 of the appliance (not s ow a connecter capable oi passing this test. in connection with which the connecter is used. Another object of my invention is to provide Formed on the section i I adjacent the convexed a contact structure for connecters of this type P is a lug which is bent around the 25 which shall be so arranged that electrical con- Jaoent edge of the section I2 so as to serve as a nection to the cord conductors can be made withhin e. Th mem r 8 r mad f r en m l out opening or taking apart the body member. and their sections normally assume the positions A further object of my invention is to provide an shown in Figs. 3 and 6. When the terminal P improved contact structure of this type, which are inserted, these sections II and I! are spread shall include means for relieving the electrical apart o Opened t0 the Position Shown in '7- connection between the cord conductors and the With this imp e form 0f socket be contact elements of the connecter from stress there is 110 necessity for a y ble c ect on beduring the use of the connecter. tween the body sections 2 and therefore the body An illustrative embodiment of this invention is y be Permanently sealed, as y the rivet 3. shown in the accompanying drawing, where1n;. The outer ends of the contact tangs iii are Fig. 1 is an axial section, partly in elevation, 0! Provided with Screws 0 attachment 1 the a connecter plug to which thi invention is conductor wires 6. In order to relieve these plied, wires-and screws from stress during use, the con- 40 Fig, 21 a s ctio partly in elevation taken on tact elements are clamped to the cord 1 by a pair 40 t line 1.4 of Fig.1 of complementary serrated Jaws i6 which are Fla 3 is an enlarged, perspective View of the formed on the tangs l0 adjacent the screws.

contact elements and cord connecting means These jaws are adapted to embrace the 70rd 'forming a part of the connecter illustrated i are held m effective engagement with the cord by 5 Figs 1 and 2 a retaining ring ll of insulating material which v is secured against accidental displacement by a Fig. 4 is a fragmentary view showing the cord clamping portion of the contact elements. pair of outwardly projecting lugs '8 formed on the jaws. In attaching the connecter to the Fig. 5 is a transverse section taken on the line cord. the jaw n are pressediinwardly y a t- 5 01' illustrating the a t o the cord able tool and the retaining ring is then slipped clamping means forming a part of the contact qver th lugs I; structure. In oi-derto facilitate the attachment of the i 6 is a transverse section of e lthe o cord to the contact elements, the latter are of tact sockets, theview being taken on the line H suilieient length to position the screws l5 and of Fig. 3. laws It wholly outside of the body member. 55

Mia-a.

Shoulders I! on the tanks ll engage the end of the body I,

The outwardly projecting portions of the con tact elements are protected by an insulating sleeve 20 whichhas an annular recess 2| formed in its inner wall for receiving an annular peripheral flange 22 formed on the body member.

The method of assembly of this improved connecter is believed to be obvious from the foregoing description. With this improved construction any stress .transmitted by the cord will be borne by the jaws l6 and will not impair the electrical -connection between the screws l5 and the conductor wires.

Although but one specific embodiment of this invention has been herein shown and described,

it will be understood that details of the con- ;struction shown maybe altered without departing from the spirit of my invention as defined by the following claims:--

I claim:

1. An electricalconnecter for use in connec tion with a multi-conductor cord having an outer insulating covering common to said conductors,

said connecter comprising a body, insulatingly spaced contacts in said body, the number of contacts corresponding to the number of said conductors and each of said conductors being electrically connected to one of said contacts. a

2. An electrical connecter for use in connectionwith-a multi-conductor cord having an cu insulating covering common to said conductors, said connecter comprising a body, in sulatingly spaced contacts in said body, the number of contacts corresponding to the number of said conductors and each of said conductors being electrically connected to one of said contacts, a jaw carried by each of said contacts, said jaws being arranged to grip the insulating covering of said cord in spaced apart relation around the surface of said covering, and a ring of insulating material disposed around said insulating covering, said ring being axially slidable'over the said jaws to clampingly retain the jaws in gripp n engagement with said cov ering and mechanically support the contacts in relation to said cord.

3. An electrical connecter for usein connection with a multi-condu'ctor cord having an outer insulating covering common to said conductors,v

said connecter comprising a body, insulatingiy spaced contacts in said body, the number of contacts corresponding to the number of said conductors and each of said conductors being electrically connected to one of said contacts, a jaw carried by each of said contacts,'said jaws being arranged to grip the insulating covering of ALBERT ri. CALDWELL.

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